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Simultaneous biosorption of Arsenic (III) and Arsenic (V): Application of multiple response optimizations.
Ecotoxicology and Environmental Safety 2018 December 31
In this work, simultaneous biosorption of As(III) and As(V) by Sargassum glaucescens was optimized using multiple response optimizations and Doehlert experimental design. The optimum condition for simultaneous biosorption of As(III) and As(V) were: biosorbent dosage 0.47 g L-1 , pH 5.9 and initial concentration 120.34 mg L-1 with maximum overall desirability of 0.94. Different isotherms were fitted to biosorption equilibrium data and the Freundlich isotherm was the most suitable model. Based on thermodynamic study, the biosorption of arsenic species onto alga was endothermic and spontaneous. Kinetic results indicated that intraparticle diffusion model was the best kinetic model. Biosorption capacity of S. glaucescens and other biosorbents were also compared.
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