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Biosorption thermodynamics of cadmium on coconut copra meal as biosorbent

Paper ID Volume ID Publish Year Pages File Format Full-Text
4999 269 2006 7 PDF Available
Title
Biosorption thermodynamics of cadmium on coconut copra meal as biosorbent
Abstract

Coconut copra meal, a waste product of coconut oil production was investigated for its potential use as a biosorbent for cadmium ions from an aqueous solution. A comparison of linear least-squares method and a trial and error non-linear method of three widely used isotherms, Langmuir, Freundlich, and Redlich–Peterson, were examined. Langmuir isotherm parameters obtained from the four Langmuir linear equations by using linear method were not similar, but were the same when non-linear method was used. The best-fitting isotherms were Langmuir and Redlich–Peterson isotherms. Langmuir isotherm is a special case of Redlich–Peterson isotherm when constant g is unity. In addition, various thermodynamic parameters, such as ΔG°, ΔH°, and ΔS°, were calculated. The biosorption process is a spontaneous and exothermic process.

Keywords
Copra meal; Cadmium ions; Langmuir isotherm; Temperature; Adsorption
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 30, Issue 2, 1 June 2006, Pages 117–123
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Price was $35.95
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