Abstract— The biosorption of Malathion from aqueous solution by green algal biomass was investigated. The green algae used were of the species Spirogyra and was collected from Neugal river near Sujanpur, Himachal Pradesh. Batch biosorption experiments were performed to examine the effect of contact time, pH, biomass concentration and initial Malathion concentration. The concentration of residual Malathion concentration after biosorption was determined using UV-Vis Spectrophotometer at a wavelength of 309 nm. The maximum adsorption was found to be at pH 7 after a contact time of 5 hours with initial Malathion concentration of 100 mg/L and biomass of weight 75 mg. The equilibrium biosorption data were analyzed using Langmuir and Freundlich isotherm. Freundlich isotherm was found to be more favorable than Langmuir isotherm.
Keywords— algae, biosorption, isotherm, Malathion, pesticide.
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