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Removal of anionic pollutants from groundwaters using Alamine 336: chemical equilibrium modelling
Author(s) -
Bringas Eugenio,
San Román M Fresnedo,
Ortiz Inmaculada
Publication year - 2006
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.1610
Subject(s) - sulfate , chloride , chemistry , chromium , extraction (chemistry) , inorganic chemistry , chemical equilibrium , environmental chemistry , chromatography , organic chemistry
This work reports the study of the chemical equilibrium of the extraction of chromium(VI) anions from groundwaters where other anionic species are present, mainly sulfate and chloride anions, using Alamine 336 as extractant. The analysis was performed working with two different systems: (i) a binary system (sulfate and chloride anions) and, (ii) a tertiary system (chromium, sulfate and chloride anions) with a composition of 9.6–15.4 mol Cr 6+ m −3 , 5.2–16.7 mol SO 4 2− m −3 and 4.2–13.5 mol Cl − m −3 respectively. A careful experimental design was performed and the data were correlated to the mathematical models obtaining the equilibrium parameters of the extraction reactions in both systems. Copyright © 2006 Society of Chemical Industry