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Kinetics modelling of biosorption by algal biomass from binary metal solutions using batch contactors

Paper ID Volume ID Publish Year Pages File Format Full-Text
4651 236 2008 7 PDF Available
Title
Kinetics modelling of biosorption by algal biomass from binary metal solutions using batch contactors
Abstract

The biosorption from four binary metal solutions, Pb2+/Cu2+, Pb2+/Cd2+, Pb2+/Zn2+ and Cd2+/Zn2+, onto algae Gelidium, algal waste and composite material, at pH 5.3 and 20 °C, were studied in batch adsorber. A mass transfer model based on a one-dimensional intraparticle diffusion rate, combined with a binary Langmuir isotherm, was applied to describe the overall biosorption rate of binary metal solutions mixture in flat seaweed biomass. A good correlation has been found between mass transfer model and experimental data for all systems. Model equations were solved numerically yielding the metal ions homogeneous diffusion coefficients. The biosorbents showed a preference for sorbing Pb over Cd, Zn and Cu even for low lead initial concentrations. Cu and Pb show a similar competition for the binding sites, although a higher uptake was found for copper ions, due to the higher initial copper concentration.

Keywords
Algae; Algal waste; Modelling; Two-metal systems; Biosorption; Kinetic parameters
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Kinetics modelling of biosorption by algal biomass from binary metal solutions using batch contactors
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 38, Issue 3, 15 March 2008, Pages 319–325
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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