Biosorption Kinetics and Thermodynamics of Arsenate and Arsenite on Spent Grains

Author

Chen Yun-nen ; Chai Li-yuan ; Yang Zhi-hui ; Wang Yun-yan

Author_Institution

Sch. of Metall. Sci. & Eng., Central South Univ., Changsha

fYear

2008

Firstpage

3260

Lastpage

3263

Abstract

The biosorption of arsenate and arsenite from aqueous solutions by spent grains, a by-product of the brewing process, was investigated. The effects of solution pH, contact time and temperature were studied in batch experiments. The initial removal is rapid and equilibrium was established in less than 180 min. Good correlation coefficients were obtained for the pseudo second-order kinetic model. The enthalpy of sorption was exothermic and the increase in As(III) removal was larger than that of As(V) over the same rise in temperature. Spent grains are a potential biosorbent for the removal of As(V) and As(III) from the effluent of metallurgical industry.

Keywords

arsenic; biochemistry; biotechnology; effluents; enthalpy; industrial pollution; metallurgical industries; sorption; wastewater treatment; water pollution; aqueous solutions; arsenate; arsenite; batch experiments; biosorption kinetics; brewing process; correlation coefficients; enthalpy; metallurgical industry effluent; pseudo second-order kinetic model; solution pH effects; spent grains; thermodynamics; Earth; Effluents; Environmental factors; Environmentally friendly manufacturing techniques; Filtration; Kinetic theory; Metals industry; Oxidation; Temperature; Thermodynamics;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioinformatics and Biomedical Engineering, 2008. ICBBE 2008. The 2nd International Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-4244-1747-6

Electronic_ISBN

978-1-4244-1748-3

Type

conf

DOI

10.1109/ICBBE.2008.1144

Filename

4536024