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Rezultatele pentru bentoniteRezultate gasite: 13
Application of polycations in separation processes
Environmental Engineering and Management Journal › Vol. 6 › Nr. 5 AbstractFlocculation performance of three chitosan samples with different viscosities (?§ = 400, 800 and 1000 mPas) and two strong synthetic polycations of integral type (PDADMAC and PCA5) on two model aqueous suspensions (kaolin and bentonite) was investigated. The flocculation results indicated that all the polycation samples were efficient in the kaolin flocculation, the turbidity being completely removed at approximately the same polycation dose; the flocculation window ranged between 2.7 an... Autori: Ecaterina Stela Dragan, Luminita Ghimici, Marcela Mihai ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25201
Environmental Engineering and Management Journal, Vol. 1 Nr. 4
Environmental Engineering and Management Journal › Vol. 1 › Nr. 4 Contain all the articles from this issue:ICEEM/01 -- Environmental Management Section Corporate environmental competence: A concept for characterising and assessing the environmental practice in companies and product chainsMichael S?¸gaard J?¸rgensen, Marianne Forman Life cycle assessment of some alternatives for the supply of thermal energy in the municipality of Iasi (Romania).Nicolae Peiu Management options for the industrial and municipal wastes in the city of Iasi Carmen Teod... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25169
Removal of acid red 398 dye from aqueous solutions by coagulation/flocculation process
Environmental Engineering and Management Journal › Vol. 7 › Nr. 6 AbstractThe removal of Acid Red 398 (AR398) dye from dye-containing solution using coagulation/flocculation process with polyaluminum chloride (PAC) and Alum was investigated. The effect of different parameters involving pH, dosage of coagulant, initial dye concentration, and bentonite as a natural coagulant aid was examined. According to the obtained results, the optimum pH, at which the maximum removal occurred, was about 4 and 5 for PAC and Alum, respectively. However, PAC performed efficient... Autori: Maryam Hasani Zonoozi, , Mokhtar Arami ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25335
Using of industrial waste materials for textile wastewater treatment
Environmental Engineering and Management Journal › Vol. 8 › Nr. 5 Abstract
Sorption is one of the several methods that have been successfully utilized for dyes removal. A large number of materials have been used as suitable sorbents for decolourization of industrial effluents: activated carbon (the most common but expensive adsorbent), polymeric resins, various low-cost adsorbents (agricultural and industrial by-products, peat, chitin, silica, bentonite, other clays, fly ash).
Our paper is a review about our researches regarding different types of industri... Autori: Daniela Suteu, Carmen Zaharia, Augustin Muresan, Rodica Muresan, Alina Popescu ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25532
ADSORPTION OF Cr(VI) ON Fe-Ni MODIFIED BENTONITES
Environmental Engineering and Management Journal › Vol. 10 › Nr. 7 A series of sodium bentonites as raw material were prepared to the modified inorganic iron-nickel montmorillonites and organic composite montmorillonites. The structural characterization and morphology of the iron-nickel crosslinked modified bentonites were observed by means of IR spectroscopy, X-ray diffraction, scanning electron microscopy. The effects of the amount of bentonites, adsorption time and pH change on the adsorption of Cr(VI) have also been studied. The results indicated that the a... Autori: Shao Hong, Cao Ninghttp://www.ecozone.ro/reviste.php?RID=25695
BENTONITE SYNTHETIC WATER BEHAVIOR DURING COAGULATION-FLOCCULATION PROCESS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 5 AbstractThe aim of this work is to characterize the flocculation process of a bentonite synthetic suspension with characteristics close toBega River from Timisoara, Romania. The time stability of the synthetic suspension was firstly investigated. After a few days ofcontinuous mixing a stable suspension was reached, stability being confirmed by monitoring the main physicochemicalparameters (pH, temperature, turbidity, dissolved organic carbon and initial particle size). In order to determine the ... Autori: Alain Liné, Cosmina-Mariana Militaru, Ligia Barna, Teodor Todinca ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26027
KINETICS AND EQUILIBRIUM ADSORPTION STUDY OF LEAD (II) ONTO LOW COST CLAYS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 3 AbstractThe performance of four low cost Iraqi clays, bentonite (BT), kaolinite (KT), attapalgite (AT) and flint (FT) to remove lead ionsfrom aqueous solutions by adsorption was investigated. Batch experiments were carried out at pre determined equilibration time,adsorbent dosage, solution pH, particle sizes, ionic strength, initial lead ions concentration and temperature. Adsorption of Pb2+ions was strongly affected by pH and best adsorption is achieved at pH 4.5. The systems were investigated ... Autori: Najwa I. Abdulla ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26086
NOVEL ELECTROKINETIC REMEDIATION SYSTEM - BORON DOPED DIAMOND (EKR-BDD) PROCESS FOR THE DESTRUCTION OF POLYAROMATIC HYDROCARBONS (PAHs) IN LIQUID PHASE
Environmental Engineering and Management Journal › Vol. 14 › Nr. 4 Abstract
This research evaluated two electrokinetic remediation systems (EKR) for separating phenanthrene from bentonite and its
electrochemical destruction by using a Boron Doped Diamond (BDD) electrode. The effect of the electrochemical potential for
the oxidation of phenanthrene in liquid phase with Ti/BDD was analyzed by Normal Pulse Voltammetry and Hydroxyl Radical
(●OH) analysis using the Spin Trapping Technique. The results showed that 70% of phenanthrene was removed from benton... Autori: Alejandro Medel ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26710
INVESTIGATION OF AMMONIUM ION ADSORPTION ONTO REGENERATED SPENT BLEACHING EARTH: PARAMETERS AND EQUILIBRIUM STUDY
Environmental Engineering and Management Journal › Vol. 15 › Nr. 4 The release of nitrogen compounds into the environment is a major concern worldwide. Different studies howed that recycled
materials have a high removal capacity for pollutants. Bentonite and its major clay minerals, smectites clays are common
bleaching agents used for oil refinery bleaching and known as bleaching earth (BE). In this study regeneration of spent bleaching
earth (SBE) acquired from the vegetable oil industry was surveyed via different methods and the regenerated spent bleaching... Autori: Mohammad Malakootian ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27000
SUITABILITY OF A CRETACEOUS NATURAL Na-BENTONITE AS CONSTRUCTION MATERIAL FOR LANDFILL LINERS
Environmental Engineering and Management Journal › Vol. 15 › Nr. 11 A natural Cretaceous sodium (Na) bentonite from North Patagonia, Argentine, is considered a potential construction material for landfill liners. It is studied alone and in mixtures with sand. Physical and chemical properties of the Na-bentonite were determined to verify the suitability of this material for the construction of low permeability mineral liners. Hydraulic conductivity measurements were conducted on pure bentonite and on mixtures of poorly graded sand with 3, 6, 9 and 12% of Na-bento... Autori: Telma Belén Musso ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27190
REMOVAL OF TURBIDITY AND HUMIC ACIDS USING CHITOSAN AS A COAGULANT AID: MODELING WITH ARTIFICIAL NEURAL NETWORK
Environmental Engineering and Management Journal › Vol. 16 › Nr. 1 In the present study, the effect of chitosan as an eco-friendly coagulant aid was investigated for removing turbidity (bentonite) and humic acid (HA) in the coagulation process. The effects of various operational parameters such as initial pH of the solution (4-9), dosage of chitosan (1-4.5 mg/L), dosage of alum (10-40 mg/L) and initial turbidity (10-150 NTU) were investigated. An artificial neural network (ANN) model was used to predict the performance of turbidity removal efficiencies by coagu... Autori: Abdolmotaleb Seid Mohammadi ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27223
PERFORMANCE OF MODIFIED BENTONITES FOR ADSORPTION OF PHENOL: MECHANISMS, KINETICS AND ISOTHERMS
Environmental Engineering and Management Journal › Vol. 16 › Nr. 11 Three modified bentonites, hydroxy-aluminum pillared bentonite (Al(OH)-Bent), cetyl trimethylammonium bromide modified bentonite (CTAB-Bent), and both cetyl trimethylammonium bromide and hydroxy-aluminum modified bentonite (Al(OH)-CTAB-Bent) were prepared and characterized by Fourier transform infrared spectroscopy (FTIR) analysis. Batch experiments were conducted on the adsorption of phenol at different temperatures, pH and initial concentration. The results indicated that adsorption capacity o... Autori: Xiping Luo ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27481
BEHAVIOUR OF NEW PULLULAN DERIVATIVE SOLUTIONS WITH BIOTECHNOLOGICAL POTENTIAL
Environmental Engineering and Management Journal › Vol. 18 › Nr. 2 The synthesis of dimethylamino-propylamine pullulan, DMAPA-P, with a substitution degree of 0.4 was performed in
dimethylsulfoxide using N,N’-carbonyldiimidazole as activator and dimethylaminopropylamine as amination agent. Then, two
quaternary derivatives (trimethylammonium-propylamine pullulan, TMAPA-P, and benzyldimethylammonium-propylamine
pullulan, BzDMAPA-P) were prepared from DMAPA-P by quaternization with methyl iodide and benzyl chloride. The behavior
of new pullulan derivativ... Autori: Anca Giorgiana Grigoras ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=27902 |