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Rezultatele pentru amberlite xad7Rezultate gasite: 7
Recovery of p-hydroxybenzoic acid from wastewaters by reactive extraction 1. Extraction mechanism and influencing factors
Environmental Engineering and Management Journal › Vol. 7 › Nr. 2 AbstractThe comparative study on reactive extraction of p-hydroxybenzoic acid with Amberlite LA-2 and D2EHPA in two solvents with different polarity (n-heptane and dichloromethane) indicated that the extractant type and solvent polarity control the extraction mechanism. Thus, the reactive extraction with Amberlite LA-2 occurs by means of the interfacial formation of an aminic adduct with three extractant molecules in low-polar solvent, or of an salt with one extractant molecule in higher polar s... Autori: Anca-Irina Galaction, Dan Caşcaval, Maria Cămăruţ ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25250
Study of the separation process of tartaric acid by ion-exchange with solid anionites Amberlite IRA-67 AND Amberlite IRA-410
Environmental Engineering and Management Journal › Vol. 7 › Nr. 4 AbstractThe present work describes an investigation of process of ion-exchange separation of tartaric acid in model systems. These investigations will be used for the separation of tartaric acid from secondary wine products. Their valorisation allows obtaining valuable compounds, as well as decreasing the huge quantities of wastes accumulated at wine making factories.As ionic exchangers, there have been used weakly basic anion exchanger Amberlite IRA-67 (tertiary functional amine groups) and str... Autori: Aliona Mereuţa, Gheorghe Duca, Herbert G. Boechzelt, Natalia Marchitan ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25286
Environmental Engineering and Management Journal, Vol. 7 Nr. 4
Environmental Engineering and Management Journal › Vol. 7 › Nr. 4 Include urmatoarele articole:â€? Removal of nickel from aqueous solution by Nordmann FIR (ABIES Nordmanniana (STEV.) SPACH SUBSP. Nordmanniana) conesâ€? Determination of heavy metals in extracts and macerates from garden flowersâ€? Biological phosphorus removal in a high performance single reactor â€? Advanced Cd2+ removal on dispersed TioO2-fly ash â€? Remediation techniques for contaminated soilsâ€? Separation of uranium(vi) from soils by extraction in aqueous PEG (1550) - Na2SO4 - Na2CO3 two-... Autori: ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25296
USE OF D2EHPA-IMPREGNATED XAD7 RESIN FOR THE REMOVAL OF Cd(II) AND Zn(II) FROM AQUEOUS SOLUTIONS
Environmental Engineering and Management Journal › Vol. 10 › Nr. 10 Abstract:The adsorption performance of a novel support for metal ions sorption and their removal from aqueous solutions was examined.The support is a new solvent-impregnated resin (SIR) which can be considered as an alternative adsorbent material capable ofselective sorption. The adsorbent was prepared by impregnating di-(2-ethylhexyl)-phosphoric acid (D2EHPA) onto AmberliteXAD7 resin beads, by dry impregnation method. The interaction between XAD7 resin and D2EHPA was evaluated by FTIRspectrosco... Autori: Adina Negrea, Adriana Popa, Cornelia Muntean, Corneliu Davidescu, Lavinia Lupa, Mihaela Ciopec, Petru Negrea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=25793
KINETIC, EQUILIBRIUM AND THERMODYNAMIC STUDIES OF CESIUM REMOVAL FROM AQUEOUS SOLUTIONS USING AMBERJET UP1400 AND AMBERLITE IR120 RESINS
Environmental Engineering and Management Journal › Vol. 12 › Nr. 5 AbstractThe performance of two cation exchanger resins, Amberjet UP1400 and Amberlite IR120 in the process of Cs(I) ions removalfrom aqueous solutions was examined. Batch experiments were carried out to determine the influence of several parameters(resin dosage, contact time, temperature and initial concentration of Cs(I) ions) on the removal process. The equilibrium wasreached after 60 min for Amberlite IR120 and after 120 min for Amberjet UP1400, with an overall adsorption performance of~97% f... Autori: Adina Negrea, Cornelia Muntean, Corneliu Mircea Davidescu, , Mihaela Ciopec, Petru Negrea ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26032
SORPTION OF HEXAVALENT CHROMIUM ION ONTO A STRONG BASIC ANION EXCHANGER: EQUILIBRIUM ISOTHERMS AND KINETIC STUDIES
Environmental Engineering and Management Journal › Vol. 13 › Nr. 2 AbstractHexavalent chromium can contaminate drinking water resources and should therefore be removed from industrial waste effluents. The use of ion exchange resin was examined in batch tests to remove Cr (VI) from acidic solution by Amberlite IRA 410. Equilibrium data were analyzed and modelled using Freundlich and Langmuir adsorption isotherms and the results showed that the adsorption behaviour of Cr (VI) could be accurately described by means of a Langmuir model. The monolayer adsorption cap... Autori: Abdeltif Amrane, Aicha Bensmaili, Malika Chabani, Yasmine Ait Ouaissa ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26289
COMPARATIVE STUDY ON ROSMARINIC ACID SEPARATION BY REACTIVE EXTRACTION WITH AMBERLITE LA-2 AND D2EHPA 2. KINETICS OF THE INTERFACIAL REACTIONS
Environmental Engineering and Management Journal › Vol. 13 › Nr. 6 AbstractThe study on the kinetics of reactive extraction of rosmarinic acid with two extractants, Amberlite LA-2 and D2EHPA,underlined the strong influence of extractant type, solvent polarity, and 1-octanol content on the relative magnitude of thediffusional or kinetic resistances and on the interfacial reaction rate. Thus, indifferent of the extractant type, the highest values ofinterfacial mass flows and reaction rates have been reached for extraction in dichloromethane. The addition of 1-oct... Autori: Mădălina Poştaru ISSN: 1843 - 3707 http://www.ecozone.ro/reviste.php?RID=26412 |
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