Metal speciation and pH effect on Pb, Cu, Zn and Cd biosorption onto Sphaerotilus natans: Langmuir-type empirical model

Biosorption data of lead, copper, zinc and cadmium onto Sphaerotilus natans at different equilibrium pH (3–5 units) were here reported and analysed. Experimental results outlined the positive effect of pH increase on pollutant uptake and also the biomass affinity series (Pb>Cu>Zn>Cd) reflec...

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Bibliographic Details
Published in:Water research (Oxford) 2003-02, Vol.37 (3), p.627-633
Main Authors: Pagnanelli, F, Esposito, A, Toro, L, Vegliò, F
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Biomass
Biosorption
Gram-Negative Aerobic Bacteria
Heavy metal
Hydrogen-Ion Concentration
Langmuir
Metals, Heavy - chemistry
Modelling
Models, Theoretical
Speciation
Sphaerotilus natans
Water Pollutants - isolation & purification
Water Purification
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Summary:Biosorption data of lead, copper, zinc and cadmium onto Sphaerotilus natans at different equilibrium pH (3–5 units) were here reported and analysed. Experimental results outlined the positive effect of pH increase on pollutant uptake and also the biomass affinity series (Pb>Cu>Zn>Cd) reflecting the hydrolytic properties of metals. An original empirical model was proposed to represent the effect of pH on heavy metal biosorption inserting q max vs. pH empirical functions into the classical Langmuir isotherm.
ISSN:0043-1354
1879-2448
DOI:10.1016/S0043-1354(02)00358-5