Iinclude urmatoarele articole:â€? Phenol degradation in water through a heterogeneous photo-fenton processâ€? Study concerning the influence of oxidizing agents on heterogeneous photocatalytic degradation of persistent organic pollutantsâ€? Nonmarket valuation of acequias: Stakeholder analysisâ€? Metals concentration in soils adjacent to waste depositsâ€? Polyelectrolyte - surfactant complexesâ€? Modelling of sorption equilibrium of Cr(vi) on isomorphic substituted Mg/Zn-Al - type hydrotalcitesâ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25206

AbstractThe present paper proposes the design of a modules system of measurement and control of data distributed transmission, implemental on automatic irrigation systems of central pivot or linear movement type. By this it is intended to obtain a complex irrigation system that allows optimization of nutrient application....
Autori: Codrin Donciu, Marinel Temneanu,
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25219

AbstractThis paper presents the connection between the heavy metals concentration in soil and their bioaccumulation in lettuce. Lettuce is a very good bioaccumulator of heavy metals and nutrients. In general, plants manifest a certain reaction to increasing the toxic metal concentrations in soil which they are cultivated on. The differences depend on plants sensitivity, and time exposure intensity (concentration of heavy metals, cultivation length, etc.), presence or absence of nutrients and oth...
Autori: Ana-Irina Smical, Elena Pop, Jozsef Juhasz, Vasile Hotea, Vasile Oros
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25299

AbstractA greenhouse experiment was conducted to determine the phytotoxic effect of heavy metals such as Cd, Cu, Ni, Pb and Zn on the growth of Sunflower (Helianthus annuus): on the seed germination, root/shoot growth and uptake of metals in soil-vermicompost media. The selected metals were dosed at various concentrations ranging from 0, 5, 10, 20, 40 and 50 ppm separately in soil - vermicompost media (3:1) in pot experiment. The seed germination, root and shoot growth were found significantly a...
Autori: Chhotu D. Jadia, Madhusudan H. Fulekar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25306

Pollution with sources from towns and industrial centres affect considerable the ecosystem waters. An accumulation of nutrients favourable to the growth of certain tiny marine organisms called phytoplankton stimulates their rapid reproduction in the water.These plankton blooms appear as patches on the surface of the water. The consequence of this process is the diminishing of the amount of oxygen from water (in the process of decompose the algae), the decease of aquatic animal and the multiply o...
Autori: Laura Stefanescu, Laura Ungureanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25351

AbstractAn experimental three-stage subsurface flow constructed wetland system was investigated for the removal of nutrient and organic matter from primary-treated domestic wastewater. Built in the Turkey Scientific and Technical Research Council-Marmara Research Center, Gebze, Turkey (Istanbul), the system consisted of a vertical flow-gravel filtration in the first stage, a horizontalsubsurface flow bed vegetated with Iris in the second stage, and a vertical-subsurface flow bed vegetated Phragm...
Autori: Bilal Tuncsiper
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25358

Include urmatoarele articole:� CsHSO4/mesoporous silica composites - new electrolytes for solid acid fuel cells� Trend in exhaust emissions from in-use gasoline vehicles� Analysis of distribution of oxygen transfer rate in stirred bioreactors for bacterial broths� Electrochemical characteristics of Ti6Al7Nb alloy in Ringer's solution� Pulsed high voltage discharge technology as a new method for killing Hepatitis C virus (HCV) cells� Hydrodynamic modelling of pollution with LNAPL gene...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25367

Abstract:Our research was focused on developing some new procedures to reduce the biodegradable wastes by composting. The aim of thisstudy was to obtain and asses at laboratory scale the maturity of three compost samples of different proportion of vegetable waste,beech sawdust and sewage sludge by analyzing their FT-IR spectra and C/N ratio. The composting process was monitored by testsperformed weekly on the three samples in order to investigate the physical parameters (pH and electroconductivi...
Autori: Anca Sauciuc, Claudia Zaha, Ileana Manciulea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25772

Abstract: The paper focuses on eutrophication due to nutrients load into a reservoir. A thermally stratified reservoir water body is divided in vertical layers and horizontal zones according to water temperature and depth. The layers show different compositions of limiting nutrient because of the density of flow and due to inhabitants on the bottom of the reservoir exposed to sunlight. The bioassay for algal growth potential test (AGPT) is the most direct and effective way to determine a limitin...
Autori: Dimitri Solomatine, Ioana Popescu, Jae-Ki Shin, Nahm-Chung Jung, Peter Kelderman, Roland K. Price
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25798

The availability of good quality water is an indispensable condition for preventing diseases and improving the quality of life. Water is one of the most important renewable resources, which must be prevented from deterioration in quality. Various physicochemical parameters like pH, alkalinity, total hardness, total dissolved solids, calcium, magnesium, nitrate, have a significant role in determining the potability of drinking water. In this study, samples were collected from wells situated in vi...
Autori: Maria Cioroi, Mirela Praisler
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25853

The paper aims to present the environmental impact of pulp and paper manufacturing and the most important production and control practices to minimizing this impact. The environmental consequences of manufacturing pulp and paper from pulping and bleaching processes are discussed in qualitative and quantitative terms. In these processes, sulfur compounds and nitrogen oxides are emitted to the air, and chlorinated and organic compounds and nutrients are discharged to the wastewaters. Large quantit...
Autori: Adrian Catalin Puitel, Dan Gavrilescu, Gheorghe Dutuc, Grigore Craciun
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25857

Global existence of a large percentage of lakes with eutrophication problems (54% in Romania) demands a predictive tool for the quality of these ecosystems. In this context, this paper proposes an eutrophication model that describes the thermal and biochemical behaviour of an eutrophic reservoir. This model was used to study an artificial lake (Goleşti reservoir) located in Romania. The conceptual model concerns a lake, which is considered as a closed aquatic system, and analyze a simply fo...
Autori: Gabriela Elena Dumitran, Iulia Rodica Damian, Liana Ioana Vuta
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25890

The nitrogen and phosphorus management in agricultural systems leads to an increased input of plant nutrients and sustains the soil fertility. Microbes contribute through different mechanisms to nutrient cycles, transforming it available for plants. Isolation of 18 Azospirillum and 18 Azotobacter bacterial isolates was effectuated from the rizosphere and interior roots of the following plants: Carex fusca All., Carex rostrata Stokes., Eriogonum latifolium Sm., Carex elata All., and from Equisetu...
Autori: Csaba Dezso Andras, Eva Gyorgy, Eva Laslo, Gyongyver Mara, Rozalia Veronika Salamon, Sarolta Szentes, Szabolcs Lanyi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25894

AbstractBy investigating the basic physicochemical characteristics, nutrients (nitrogen, phosphorus and potassium) and heavy metalconcentrations of the excess sludges from four wastewater treatment plant (WWTP) in Xi’an city, the feasibility of applyingsewage sludge to landscaping in Xi'an was studied. The results showed that the basic physicochemical properties of sewagesludge satisfy the requirement of most plants growth. The sewage sludges are rich of organisms, nitrogen and phosphorus, butre...
Autori: Bohan Yin, Qin Zheng, Rixia Zhang, Sheping Wang, Xinan Liu, Zhengliang Yang
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25964

A fast economic development in China over thelast three decades has lifted hundreds of millions ofpeople out of poverty. However, an annual GDPincrease of over 10% due to the large scale industrialactivities and fast urbanization has released substantialamounts of pollutants into the environment and exertedtremendous pressure on local ecosystems. Although alarge amount of investment has been made by theChinese government and a series of efforts have beenmade by the environmental regulators, scie...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25965

Abstract Using sludge with dangerous substances content as an agricultural fertilizer can provide risks for humans and all environmental components. An important risk factor that had to be taken into account is the combination of sludge used as a fertilizer and agriculture activities that has its own consequences. In this paper, a risk evaluation for sludge disposal was elaborated. The most important risk factors in the studied case, wastewater sludge used as an agricultural fer...
Autori: Elena Manea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26141

AbstractNutrient runoff is an environmental concern. There is a need for a robust method of predicting nutrient concentrations in runofffrom feedlots to facilitate management practices. To investigate the feasibility of using multiple linear regression (MLR) andartificial neural network (ANN) in predicting nutrients in runoff, simple water quality paramters (e.g., pH and EC) of runoff froma feedlot in North Dakota, USA, were used to train an ANN. Both models accurately predicted potassium concen...
Autori: Bilal Cemek
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26236

AbstractWastewater sludges are organic and nutrient-rich materials that could be used to improve soil tilth. However, the land applicationof sludge needs to be properly managed to avoid the detrimental effects on micro and macroorganisms in the soil. Earthwormsare one of the most important soil macroorganisms. Addition of sludge to the soil environment may impact earthworm activity,and in turn, soil productivity and health. In this study, sludge from the canned food industry was added to soil mi...
Autori: Efsun Dindar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26238

AbstractThe present study is aimed at a long-term treatment performance of a constructed wetland with horizontal subsurface flow atJimlíkov, Czech Republic. The system was put in operation in 1993 and the treatment performance is evaluated for the period1998-2009 due to non-existence of results from the beginning of operation. The parameters of concern were BOD5 (biochemicaloxygen demand), COD (chemical oxygen demand), TSS (total suspended solids), NH4-N (ammonia-N) and TP (totalphosphorus). A t...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26258

AbstractA septic tank is an essential part of the decentralized wastewater management system. The aim of the experiment described inthis paper was to evaluate the impact of the method of sampling and hydraulic retention time (HRT) on the performance of acircular three chamber septic tank and to design a septic tank for a single household with four residents and wastewater flowrateof 0.6 m3/d. It was found out that the difference between suspended solids (SS) and chemical oxygen demand (COD) remo...
Autori: Ala Kirjanova, Mindaugas Rimeika, Regimantas Dauknys
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26329

AbstractAlgal blooms in reservoirs used for both fish and drinking water production are a major water quality problem. The authorsassessed data gathered from both published literature and from their own field enclosure experiments to analyze the relationshipsof phytoplankton chlorophyll α concentrations with biomass and algal cell count. Experimental data were collected from indoorlocations, field enclosures, and natural water bodies. Under laboratory conditions, where the types of algae an...
Autori: Chang-juan Zang, Chao Lin, Feng Gao, Hong-chuan Pan, Miklas Scholz, Min Wu, Sheng-lan Du, Sui-liang Huang, Yong Guo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26335

AbstractIn this work, the effect of the addition of some nutrients on fungal growth and removal of Cr(III) were investigated. Theconsidered fungi, isolated from real tanning factory environment were Phanerochaete chrysosporium, Aspergillus niger and A.oryzae. Firstly, the optimal conditions for fungal growth were determined as a function of pH, contact time, temperature andagitation speed. Secondly, the effect of the addition of some nutrients on fungal growth was examined. Without the addition ...
Autori: Abdeltif Amrane, Mansur Zarrabi, Mohammad Noori Sepehr
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26337

AbstractAnalysis and monitoring of arsenic is still a challenging analytical task. Due to its complex behaviour (different forms of arsenicthat can be present depending on pH and oxidation states of arsenic) as well as demanding analytical procedures and instrumentaltools for control of arsenic concentration in drinking water which is set to 10 μg L–1, there are still some open questions andissues when arsenic is the scientific topic. In this paper the idea was to use a multivariate statist...
Autori: Vladana N. Rajakovic-Ognjanovic
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26506

AbstractWater recycling and reuse, answering the needs of creating cleaner water resources, need to be closely related with water resourcemanagement and technologies. Current municipal wastewater treatment plants are capable to control conventional pollutants(carbonaceous compounds, particulate matter, nutrients). Priority organic compounds, like polyaromatic hydrocarbons,polychlorinated biphenyls, endocrine disrupting chemicals, personal care products, pesticides etc., may escape the treatment ...
Autori: Andreea Chelba
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26521

AbstractGreywater (GW) has attracted global attention as an alternative water source over the last few decades. GW treatment andreliable reuse require the overall qualitative characterization of samples from different sources. This paper represents aninvestigation of household-generated GW in the Northern Great Plain Region of Hungary. Modern and reliable analyticaltechniques and instruments (ion chromatography, microwave plasma atomic emission spectrometry, Zetasizer Nano Z analysis,etc.) were ...
Autori: Ildiko Bodnar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26528

Abstract Biodegradable chitosan was used to cover fertilizer granules with an inert, impermeable layer in order to obtain a material with controlled release properties. The process was performed in a laboratory drum granulator. Prepared materials were characterized with available analytical methods (XRD, optical microscopy). The layer thickness of the obtained materials was in the range of 0.047 – 0.5425 mm. The degree of nutrients' release (0.64-0.965 within five hours) were deter...
Autori: Krzysztof Lubkowski
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26583

Abstract The biological removal of organic matter from a cosmetic wastewater by sequencing batch reactors has been optimized by analyzing the influence of the hydraulic retention time as well as the inclusion of anoxic and/or aerobic stages in the process sequence. Hydraulic retention time of 5 d led to the highest total organic carbon and chemical oxygen demand removal regardless the sequence used. Although a completely aerobic sequence can be used for cosmetic wastewaters treatment, the al...
Autori: Montserrat Tobajas
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26589

Abstract Anaerobic processes have been successfully applied in the treatment of municipal and industrial wastewaters. Judicious use of nutrients in anaerobic treatment has not been systematically investigated. The optimal nutrient dosage for anaerobic wastewater treatment systems is largely unknown. In this paper, COD:N:P ratio used by various researchers in anaerobic wastewater treatment systems for treating different types of wastewaters are compiled and critically analyzed. In order to ha...
Autori: Athar Hussain
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26697

Abstract Thermophilic anaerobic digestion is a suitable technology to treat agricultural waste because of its higher biogas production, hygienisation effect and solids removal efficiency. Although these benefits, poor effluent quality and instability are encountered in some cases. The anaerobic co-digestion of winery waste and waste activated sludge at 55°C, operating at 23 days HRT and with an organic loading rate of 3.2 kg COD/m3d, was characterized by accumulation of volatile fatty ac...
Autori: Cinzia Da Ros
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26775

Abstract This article presents the result of investigation on the spatial and temporal changes in water quality of Uluabat Lake. It examines the relationship between water and sediment quality parameters, and assesses the factors affecting eutrophication. Water and sediment quality are examined at 8 stations in the lake between May 2008, and May 2009. Water and sediment quality parameters measured are T, pH, EC, SD, NH4-N, NO3-N, TN, PO4-P, TP. Also DO, alkalinity, hardness, SS, BOD, COD, Ch...
Autori: Feza Karaer
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26850

Abstract Ash resulting from wood combustion constitutes a waste disposal problem to facility owners. The use of ash fertilizer or soil amendment could provide nutrients for agriculture if its nutrient content is adequate and it does not contain harmful amounts of heavy metals. The recycling of nutrients bound in ash would provide an inexpensive solution to waste problem. In our study, we aimed to characterize ash and clinker resulted from incineration of oak waste resulted from wood industry...
Autori: Ioan Oroian
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26885

Abstract Heavy metals are considered important pollutants found in sewage sludge. That is why sewage sludge can have a limited use as fertilizer in agriculture. Some aquatic plants can remove nutrients and heavy metals from media as sewage sludge or contaminated sediments. In this paper, we investigated the effects of different concentration levels of two heavy metals (Ni and Cd), respectively, 10, 35, 85 and 20, 50, 150 mg/kg in sedimentary media on plant uptake of Ni and Cd, considering th...
Autori: Shahram Goudarzi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26912

Abstract The possibility to use release controlled fertilizers in the agriculture of the tropical countries is more important than in the agriculture of the countries of the cold regions. In this context, the purpose of this work is the characterization of an encapsulated commercial Fertilizer of Controlled Release named FERLENT®, which was covered with a polymeric material, obtained in situ, under controlled conditions, which allowed to corroborate the fairly well adjustment of the synt...
Autori: Mayra González Hurtado
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26916

Moving bed biofilm reactor (MBBR) technique is a useful technology for the treatment of mature landfill leachate. The reactor start-up and acclimation processes illustrated that many factors, such as biomass, C/N ratio, and influent volumetric loading rates, could affect the ammonium-nitrogen (NH4+–N) and COD removal. The factorial experiments were carried out to determine the optimal reactor operational conditions, and the results demonstrated that when DO 2-4 mg/L, pH 7.5, and hydraul...
Autori: Wei Li
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26932

Composting is one of the most used biowaste recycling method. The paper highlights the influence of some natural organic additives such as cattle and poultry manure on the quality of compost and especially on the content in microelements and heavy metals. The mature compost showed the following macro and microelements concentrations: total N 1.12-1.38%, P 0.56-0.90%, K 0.68-0.92%, Ca 1.18-1.70%. Mg 0.38-0.66%. The compost that included cattle manure showed the highest content in humic substa...
Autori: Irina Smical
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27032

The investigation of bottom sediments in oxbow lakes was conducted in the free-flowing, meandering section of the Łyna River in N Poland. Seven oxbow lakes, differed by a degree of hydrological connectivity with the river channel, were chosen for the present study. In samples taken from 21 sediment profiles, particle size distribution, pH, bulk density, CaCO3, organic matter, total organic carbon as well as total forms of N, P, K, Ca, Na, Mg, Mn and Fe were determined. The gradient of de...
Autori: Szymon Kobus
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27052

This paper analyzes and compares the effects of bioremediation on total petroleum hydrocarbon (TPH) degradation using composting techniques as well as biostimulation and bioaugmentation approaches. Compost and sludge were added as organic amendments with the dual purpose of providing both nutrients and microorganisms to the contaminated soil. In addition, the effect of inoculation with white-rot fungus Trametes versicolor was assessed. Two different types of soils were considered: a poor soi...
Autori: Juliana Abraham
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27101

Intensive agriculture has become an indispensable practice because it has to meet the needs of increasingly large yields to feed the population of the planet. In recent years, tough challenges to increase the efficiency of bioconversion were performed, since the conventional system has negative impacts on the environment, especially on health products by low intake in nutrients. In this context, the aim of this study is to show the effects of fertilization measures, which improve the quality ...
Autori: Daniela Cristina Dimitriu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27110

The direct measurement of the nutrients largely contributes to understand how the quality of the information, coming from the instruments, may improve the performances of the plants. The advanced knowledge acquired on the meaning of the signals gives new possibilities to control the biological processes and estimate the operational state of the plant, improving the quality of the effluent and keeping the operational costs as low as possible. Such information, furthermore, can be used to under...
Autori: Carmine Fiorentino
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27127

Two 17β-Estradiol (E2) degrading strains were isolated from the activated sludge of swine wastewater bio-treatment aerobic facility and affiliated to Bacillus subtilis based on 16S rRNA gene sequencing. The degradation rates were more than 90–95% at 37 °C in 4 days when E2 was the sole carbon source. Steady and effective nutrients and estrogen removals were achieved in three parallel sequencing batch reactors (SBRs) treating real swine wastewater for 90 days, which contributed to ...
Autori: Meixue Chen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27162

Intensive cereal crops planted on soils from the Western part of Romania determine, annually, significant losses of essential microelements and macronutrients for plant development from the agricultural soil, which lead to the depletion of such lands. Fly ash (FA) resulted from coal combustion at the CET Timisoara power plant, can be used as supplement to an organic fertilizer, such as manure (M) to restore the balance of micro- and macronutrients, important to obtain healthy cereal crops and hi...
Autori: Smaranda Masu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27208

The paper discusses the pollution status in the case of an important NE Romanian watercourse (Siret River) in Pascani town area based on the analysis of some water quality indicators (pH, temperature, dissolved oxygen, organics (COD and BOD5), conductivity, fixed residues, nitrogen-based nutrients (N-NH4+, N-NO3-, N-NO2-), phosphates, total phosphorus (P), total calcium (Ca2+), magnesium (Mg2+), iron (Fe2+, Fe3+), turbidity and suspended solids content) measured at three local strategic control ...
Autori: Carmen Zaharia
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27281

Water is the source of life and a high water quality leads to a harmonious development of the surrounding environment (biotic and abiotic) and of humans. When water is loaded with various chemicals due to erosion, corrosion and human activities, the pollution phenomenon appears, causing harmfull effects over plant and animal organisms. The presence in water of substances derived from agriculture or mismanagement of manure organic obtained from various species of domestic animals affects the envi...
Autori: Alina Simionică Bădilă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27285

The paper presents a study concerning the influence of the hydraulic and hydrological connectivity among the oxbow lakes and the restoration of riparian-zones have on aging. Interconnectivity oxbow lakes emerge after complex regulating works for the protection of the shores and bottom of the lakes. Research has analyzed the influence of the hydraulic connectivity of three lakes located in northern Poland on the structure of associated bottom invertebrates – elements that monitor the cond...
Autori: Anca Balan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27342

This research was focused on the valorization of agro industrial waste/by products available in the local industry with the kilometer zero (km 0) concept, as a replacement of virgin raw materials (clay) to elaborate lightweight aggregates (LWAS). The alternative raw materials were employed as pore forming agent, in order to reduce sintering temperature and energy consumption of the furnace. The three technical nutrients studied were provided for local food industries: sludge from wastewater trea...
Autori: Romina D. Farias
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27405

Eutrophication is water pollution initiated by high amounts of plant nutrients. With the excess influx of nutrients from human activities, the eutrophication process begins and causes a breeding ground for algae. The amount of nutrients present in any given cycle will be higher than the levels present in previous cycles. Therefore, it is very important to manage water quality in lakes and dams to prevent and to slow or to reverse the eutrophication process. This can be ensured by using effect...
Autori: Saeed Bashiri
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27442

Mobilization of micro- and macronutrients and their uptake by Zea mays L. and Triticum aestivum L. in response to EDTA additions to risk metal contaminated agricultural soil was monitored over a three year period on the field scale. EDTA addition effectively increased the mobility of total water-soluble micronutrients (Cu, Fe, Mn) and macronutrients (Ca, Mg, P) in soil extracts. Mobilization was highest in the first year and decreased strongly over time. Elements with a high affinity for EDTA (C...
Autori: Reinhard Rauch
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27477

Pot experiments were performed with a barren soil amended with fly ash stabilized municipal sewage sludge to cultivate Brassica chinensis. Accumulation and transformation of heavy metals in the tested soil-plant system were investigated. The results showed that appropriate application of fly ash-sludge mixture could improve the growth of Brassica chinensis. The plants cultivated in F30 treatment, which contained 14% (volumetric) sludge and 6% (volumetric) fly ash, presented the highest yield and...
Autori: Ruilian Yu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27511

Weakly acidic Litavka and alkaline Malín soils are some of the most contaminated soils by multiple risk elements in the Czech Republic. The aim of this paper was to determine the effect of P sources (rock phosphate, superphosphate), each applied at three rates on the mobility of risk elements (Cd, Zn, Pb, As) and micronutrients (Fe, Mn) in soils and to compare their effectiveness with lime and dolomite tested in our previous study. In 7, 14, 28, and 42 days, we determined CaCl2-extractabl...
Autori: Stanislava Vondráčková
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27521

This work describes the variations in nitrogen (N) and phosphorus (P) removal performances and bacterial population dynamics in response to different influent C/N and C/P ratios in a novel BNR-IC process combining biological nutrients removal (BNR) with induced crystallization (IC). A good nutrients removal performance was achieved at 7.8 of C/N ratio and 23.3 of C/P ratio, where P and TN removal efficiencies were 94.0±2.4% and 90.5±4.3%, respectively. Moreover, significant changes...
Autori: Haiming Zou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27523

It is acknowledged that organic fertilizers and wastes, such as animal slurries/manure from intensive farm enterprise, sewage sludge, poultry litter are and will continue to be spread on agricultural land and provide beneficial nutrients to crops. However, many of these materials which are also potentially polluting if not properly managed can pose a risk to groundwater and surface water quality. Generally, their distribution on the soil is performed with specialized machines to reduce the risk...
Autori: Vasilica Ştefan
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27545

In this paper, a model based on Back-Propagation (BP) artificial neural network was proposed, as a tool predict the soil suitability for cultivation in Jiangxia district. The model takes the soil nutrients indicators as the input and the level of soil suitability as the output. The correlation analysis showed that the correlation coefficient between expected output and actual training result is 0.99. The simulative results indicate that the learning and generalization ability of the model perfor...
Autori: Zhuoyan Feng
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27546

This work evaluates the effect of 5 mixtures of water treatment sludge, soil from the Cerrado region (Brazil) and a commercial substrate on the growth of 4 species of native plants (Copaifera langsdorffii, Astronium fraxinifolium, Peltophorum dubium and Tabebuia roseo-alba) from the Brazilian Cerrado. A randomized design was setup with four repetitions and WTS loading rates of 0, 204, 417, 638 and 869 g/kg. Plant sampling for analysis was performed at 30, 60, 90, 120 and 150 days after planting,...
Autori: Paulo Scalize
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27593

The growth of a non-axenic Phormidium bigranulatum-dominated mat was tested under a range of chemical parameters and types of substrate. Total biomass yield (in term of mg chlorophyll a) of mats grown on muslin cloth (0.64 mg) and cotton mesh (0.62 mg) were significantly higher than those on other substrates, such as, nylon net (0.50 mg), sands of river Sone (0.43 mg) and river Ganga (0.30 mg), rice husk (0.38 mg) and saw dust (0.21 mg). The Phormidium mat would be easy to handle in bioremdation...
Autori: Dhananjay Kumar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27635

Pesticides are considered among the most serious environmental pollutants, frequently used in the control of agricultural and domestic pests. Biodegradation of chlorpyrifos and its 3,5,6-trichloro-2-pyridinol (TCP) derivative was studied in mineral medium and soil with fungal consortium consisting of JAS1 and JAS4 strains which were isolated from paddy field soil. The fungal consortium was spiked with 300 mg l-1 chlorpyrifos which was degraded completely within 12 h of incubation in the miner...
Autori: Jayanthi Abraham
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27655

The objectives of this study were to investigate: a) whether the duration of organic farming influences the dimension, shape and geometry (fractal dimension) of soil micropores (<50μm) and b) for relationships of morphometric traits with certain chemical and biochemical soil variables (microbial biomass, N- and C-mineralization rates, NH4+, NO3-, organic C and N, extractable P, Mg+2, K+, Ca+2). We compared soil micromorphometric traits (area, perimeter, compactness, solidity, eccentricity)...
Autori: Nikolaos Monokrousos
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27682

Gaseous toluene biofiltration as affected by ryegrass (Lolium perenne L.) roots was investigated in this study. The results revealed that the populations of bacteria, actinomycetes were larger in the ryegrass rhizosphere than in the bulk soil since ryegrass provided root exudates as major nutrients available for the microorganisms. An increase in the microbial populations in a ryegrass-growing biofilter would significantly stimulate toluene biodegradation in comparison with a vegetation-free bio...
Autori: Zhongjun Xu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27772

Water sea pollution is influenced mainly by anthropogenic causes due to industrial and municipal activities which affect the quality of sea water, sediments and the whole ecosystem. In this paper, the correlation between contamination sources and the environmental quality of marine sediments was analyzed through multivariate analysis, in particular Principal Components Analysis (PCA), Cluster Analysis (CA) and Correlation Analysis. Considering the case study of Mar Piccolo in Taranto (Ionian Sea...
Autori: Claudia Labianca
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27793

The goal of the present work is to evaluate the efficiency of bioventing on low permeability soils stimulated with hydraulic fractures and polluted by a mixture of semi-volatile and non-volatile hydrocarbons. A synthetic non-aqueous phase liquid (NAPL) composed of 5 hydrocarbons is prepared: 1,2,4-trimethylbenzene (TMB), methylcyclohexane (MCE), n-dodecane (n-C12), n-decane (n-C10), n-eicosane (n-C20). The capacity of indigenous bacteria to degrade high NAPL concentrations is evaluated with biov...
Autori: Dimitra N. Tzovolou
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27849

In this paper a two stage bench scale leaching procedure is used to assess the heavy metals release from a wood-based fly ash of a 5.0 MWth grate-fired boiler. In the first step mostly K was leached with water. In the subsequent acid leaching step heavy metals were leached at a pH of 3. The remaining solids were agglomerated together with the bottom ash and the dried K-concentrate from the first leaching step whereas the filtrate was treated before discharge. In the agglomerates produced the ...
Autori: Christof Lanzerstorfer
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27875

Lake Hazar is one of the largest and deepest lakes in the Eastern Anatolia Region of Turkey. It is an outstanding natural resource and famous for its blue, clear, deep and alkaline waters. However, a drastic decrease in water quality and water clarity of the lake has occured in recent years. This decrease is mainly a result of nutrient and sediment transport to the lake. This study was conducted to assess water quality of Behrimaz Stream and amounts of freshwater, nutrients, major ions, biolo...
Autori: Memet Varol
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27891

Clinoptilolite (Clin), the most widely used natural zeolite in environmental applications, was used as soil additive to investigate its effectiveness in protecting and improving the quality of soils that received surface disposal of OMW, as well as in limiting nutrients leaching from the degraded soils. Clin was added in a batch experiment of 18 months, where OMW were added in evaporation ponds and on soil for a period of more than 12 years. The zeolite was added as dust (particle diameter &l...
Autori: Maria K. Doula
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28018

Wastewater for irrigating tree crops may act both as water and mineral nutrients source, offering potential agronomical and environmental advantages. This work investigated the effect of an entire season supply of secondary treated wastewater (STW) on the nutritional and physiological responses of 3 year old apple trees. Trees (Gala /M9) were individually grown on 40-L pots filled with a sandy-loamy soil and drip irrigated with: 1)Tap water (TW) (without any mineral fertilizer inputs); 2) Tap wa...
Autori: Giulio Demetrio Perulli
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28079

Digestate derived from the anaerobic digestion of biowaste is a nutrient-rich substance whose direct use on land is not permitted by the Italian Legislation. The possibility of recovering its nutrients can be given by the processes of stabilisation and sanitation required by the Italian Legislation. Among these processes, composting and calcium hydrolysis with neutralization (CHN) permit to obtain useful soil improvers like compost and defecation gypsum (DG). In this paper a gate-to-gate Life Cy...
Autori: Sofia Spagnolo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28080

The aim of this research was to improve the removal of organic matter and nutrients from wastewater from pig farms in a combined batch reactor performed as anaerobic-aerobic sequential. For this purpose, it was suggested to include recirculation cycles of wastewater in a sequentially pulsed manner in the anaerobic treatment followed by intermittent aeration in the aerobic-anoxic treatment. This novelty implemented in both sequential reactors was studied under pilot scale conditions. The process ...
Autori: Jorge Alonso Cortes-Esquivel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28101

Aim of the study is to determine Fe, Mn and Cd adsorption in the carbonate-rich clayey soils and to assess their environmental impacts. Soil samples represented a carbonate-rich clayey soil (Isaoren), carbonate-rich soil (Maşuk) and clayey soil (Aşık) was obtained from three different villages in Sanliurfa, southeast of Turkey. Adsorption studies were carried out with batch method. The maximum Fe, Mn and Cd adsorption was found on Isaoren, Maşuk and Aşık soils with ...
Autori: Ayse Dilek Atasoy
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28116

In this study we present time-related 3D ERI models for a site that was contaminated using waste automobile engine oil. The pristine geo-electrical characteristics of the site were recorded before the contamination was carried out. The purpose of the study was to progressively monitor the geo-electrical responses of the site for possible natural bio-transformations on the waste oil. Data were acquired once every two weeks for a period of three months using eight parallel 2D resistivity profiles....
Autori: Bokani Nthaba
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28118

Municipal wastewater treatment is a global issue and an expensive process. Treatment of the wastewater using algal growth is a cost-effective approach, because of easy propagation of algae in wastewaters through utilization of most of the nutrients and in turn reduces the pollution load. As a preliminary research work, laboratory scale studies were done using native algal species collected from particular sources. They were grown in different pond waters to observe the biomass development in co...
Autori: Iqbal Ansari
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28135

The recovery of nutrients from sewage sludge ash, especial phosphorus, is one of the most important alternative in sewage sludge management. Phosphorus is an essential element for all living organisms and very important for agriculture and industry, as well as. Because the phosphorus is a non-regenerative resource, its recovery plays an important role for society. Phosphorus capitalization as struvite (NH4MgPO4.6H2O) from sewage sludge has attracted considerable attention due to its potential to...
Autori: Bogdan Adrian Militaru
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28158

The mineral contents of leaf, leaf petiole, fruit and fruit peduncle during the early and late stages of the production cycle may explain differences in response to fertilization in several strawberry genotypes. The aim of this study was to evaluate the nutritional status of two strawberry cultivars grown in soil. The nutritional status was determined as the amounts of nutrients taken up by the strawberry plants and the nutrient distribution within various parts of the plants during the produ...
Autori: Antonio DomĂ­nguez
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28187

Interest in water recycling has provided opportunities to evaluate the potential impact of pharmaceuticals and personal care products (PPCPs) on plants where recycled wastewater is used for watering and irrigation. Most researches have focused on the impact of pharmaceuticals on seed germination and plant physiology or the uptake of pharmaceuticals into plants. We sought to find out whether nutrient and metal uptake into wheat plants were affected by the presence of PPCPs (acetaminophen, caffein...
Autori: Etem Osma
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28193

Nutrients have been considered the main factor affecting microorganisms responsible for methane gas production during anaerobic digestion processes. In this study, the nutritional composition of some fruit wastes; mango (M), watermelon (W), pawpaw (P), their effects on methane gas production, and resulting energy values were assessed. Substrate samples for anaerobic digestion where prepared into various slurry treatments; M, W, P, WM, PW, MP, MWP and CONTROL. Proximate compositions of the subst...
Autori: Ogemdi Chinwendu Anika
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28233

Current landscapes have been intensively modified by humans and forest fragmentation has created substantial increases of forest edges. So far, scale-dependence between observable ecological patterns and the underlying processes affected by forest fragmentation have been widely ignored. To overcome the widespread ambiguity in selecting relevant spatial scales for studying the ecological effects of forest fragmentation, we investigated the effect of forest prevalence and edge length on carbon st...
Autori: Emilia I. Cojoc
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28242

Côte d'Ivoire is one of the world's leading producers and exporters of agricultural products. Unfortunately, the multiplicity of stakeholders in this sector and the absence of legislation and regulations have contributed to the pollution of the various hydro systems, particularly those of Taabo river basin. The purpose of this study was to assess the ability of the Soil and Water Assessment Tool (SWAT) model to test the applicability of three vegetative filter strips scenarios to m...
Autori: Kouao Armand Anoh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28346