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Experimental and Theoretical Investigations of Biosorption of Lead Mercury Chromium and Arsenic onto Dry Activated Sludge from Wastewater
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Abstract
The biosorption of lead, mercury, chromium and arsenic ions from simulated of wastewater onto dry activated sludge in single component systems has been studied using batch adsorber. A film-pore diffusion model has been used to predict concentration-time decay curves successfully for metals ions using COMSOL multiphysics software. The external mass transfer coefficient and diffusion coefficient were determined from the model at optimum agitation speed, 600 rpm and optimum weight of sewage sludge biomass. Eleven isotherm models were used. Among these, Langmuir model gave the best fit to an experimental data
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