A model to describe Cr(VI) kinetics biosorption

Journal of Hazardous Materials
Jordi Poch, Isabel Villaescusa

Abstract

In this work, the effect of pH control on kinetics of Cr(VI) sorption onto grape stalks has been studied. A set of experiments were performed at a constant pH 3+/-0.1 which was assured by means of a Programmable Logic Controller (PLC). In a second set of experiments the initial pH was adjusted to pH 3 and then pH was allowed to freely evolve during the sorption process. Both sets of experiments were carried out at different temperatures within the range 5-50 degrees C. Constant temperature was assured by water recirculation from a thermostatic bath. Results demonstrated that pH has high influence on kinetics only at the lowest temperatures studied. A model based on a complex reaction sequence which takes into account Cr(VI) sorption, reduction of Cr(VI) to Cr(III), sorption of the formed Cr(III) which includes the pH variation during the sorption process has been proposed to model Cr(VI) kinetics sorption onto grape stalk waste. Furthermore, the robustness of the model has been tested.

References

Jan 3, 2006·Journal of Hazardous Materials·M Gheju, A Iovi
Apr 10, 2007·Bioresource Technology·Donghee ParkJong Moon Park
Oct 20, 2007·Bioresource Technology·Núria FiolIsabel Villaescusa
May 31, 2008·Bioresource Technology·Donghee ParkJong Moon Park
Jun 3, 2008·Journal of Hazardous Materials·Parinda SuksabyeWoranan Nakbanpote
Jun 2, 2009·Journal of Hazardous Materials·Carlos EscuderoIsabel Villaescusa

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Citations

Sep 24, 2015·The Science of the Total Environment·Chang LiuJordi Poch
Feb 22, 2017·Journal of Basic Microbiology·Shiny C Matilda, Chittibabu Shanthi

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