Item


New approach in modeling Cr(VI) sorption onto biomass from metal binary mixtures solutions

In the last decades Cr(VI) sorption equilibrium and kinetic studies have been carried out using several types of biomasses. However there are few researchers that consider all the simultaneous processes that take place during Cr(VI) sorption (i.e., sorption/reduction of Cr(VI) and simultaneous formation and binding of reduced Cr(III)) when formulating a model that describes the overall sorption process. On the other hand Cr(VI) scarcely exists alone in wastewaters, it is usually found in mixtures with divalent metals. Therefore, the simultaneous removal of Cr(VI) and divalent metals in binary mixtures and the interactive mechanism governing Cr(VI) elimination have gained more and more attention. In the present work, kinetics of Cr(VI) sorption onto exhausted coffee from Cr(VI)-Cu(II) binary mixtures has been studied in a stirred batch reactor. A model including Cr(VI) sorption and reduction, Cr(III) sorption and the effect of the presence of Cu(II) in these processes has been developed and validated. This study constitutes an important advance in modeling Cr(VI) sorption kinetics especially when chromium sorption is in part based on the sorbent capacity of reducing hexavalent chromium and a metal cation is present in the binary mixture

This research was funded by the Spanish Ministry of Science and Innovation as part of the project CTM2012-37215-C02-01

© Science of the Total Environment, 2016, vol. 541, p. 101-108

Elsevier

Author: Liu, Chang
Fiol Santaló, Núria
Villaescusa Gil, Isabel
Poch Garcia, Jordi
Date: 2016 January 15
Abstract: In the last decades Cr(VI) sorption equilibrium and kinetic studies have been carried out using several types of biomasses. However there are few researchers that consider all the simultaneous processes that take place during Cr(VI) sorption (i.e., sorption/reduction of Cr(VI) and simultaneous formation and binding of reduced Cr(III)) when formulating a model that describes the overall sorption process. On the other hand Cr(VI) scarcely exists alone in wastewaters, it is usually found in mixtures with divalent metals. Therefore, the simultaneous removal of Cr(VI) and divalent metals in binary mixtures and the interactive mechanism governing Cr(VI) elimination have gained more and more attention. In the present work, kinetics of Cr(VI) sorption onto exhausted coffee from Cr(VI)-Cu(II) binary mixtures has been studied in a stirred batch reactor. A model including Cr(VI) sorption and reduction, Cr(III) sorption and the effect of the presence of Cu(II) in these processes has been developed and validated. This study constitutes an important advance in modeling Cr(VI) sorption kinetics especially when chromium sorption is in part based on the sorbent capacity of reducing hexavalent chromium and a metal cation is present in the binary mixture
This research was funded by the Spanish Ministry of Science and Innovation as part of the project CTM2012-37215-C02-01
Format: application/pdf
ISSN: 0048-9697
Document access: http://hdl.handle.net/10256/12357
Language: eng
Publisher: Elsevier
Collection: MINECO/PN 2013-2016/CTM2012-37215-C02-01
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.scitotenv.2015.09.020
Articles publicats (D-EQATA)
Is part of: © Science of the Total Environment, 2016, vol. 541, p. 101-108
Rights: Tots els drets reservats
Subject: Metalls pesants -- Absorció i adsorció
Heavy metals -- Absorption and adsorption
Crom -- Absorció i adsorció
Chromium -- Absorption and adsorption
Crom -- Aspectes ambientals
Chromium -- Environmental aspects
Title: New approach in modeling Cr(VI) sorption onto biomass from metal binary mixtures solutions
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

Subjects

Authors