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Kinetics and thermodynamics of heavy metal ions sequestration onto novel Nauclea diderrichii seed biomass

  • This study reports the sequestration of Cd(II) and Hg(II) using a new biosorbent. Nauclea diderrichii seed biomass. Experimental data obtained were fitted into kinetic and thermodynamic models. Experimental data fitted best into pseudo-second order kinetic model among others. Results obtained kinetically revealed that the biosorption of Cd(II) and Hg(II) using N. diderrichii seed biosorbent increased with increase in temperature. At the highest temperature, which was 333 K. the highest amount of metal biosorbed, q(e), for Cd(II) and Hg(II) obtained were 6.30 and 6.15 mg/g respectively. The biosorption of Cd(II) was kinetically faster than that of Hg(II), the highest initial biosorption rates for Cd(II) and Hg(II) were 56.19 and 4.39 mg/g min respectively. Thermodynamic parameters obtained by Erying equation from this study revealed that the biosorption process was spontaneous, feasible, endothermic with a decrease in the degree of chaos in the biosorption system. (C) 2012 Elsevier Ltd. All rights reserved.

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Author:Martins O. Omorogie, Jonathan O. Babalola, Emmanuel I. Unuabonah, Jian Ru Gong
ISSN:0960-8524 (print)
Place of publication:OXFORD
Document Type:Article
Year of first Publication:2012
Year of Completion:2012
Release Date:2017/03/26
Tag:Biosorption; Film diffusion; Kinetics; Nauclea diderrichii seed biosorbent; Thermodynamics
First Page:576
Last Page:579
Funder:Academy of Sciences for the Developing World; Chinese Academy of Sciences (TWAS-CAS); National Basic Research Program of China (973 Program) [2011CB933401]; National Natural Science Foundation of China [21005023]; K.C. Wong Education Foundation, Hong Kong