Evaluation of the Eriobotrya japonica leaf powder for the biosorption of mercury from aqueous system
Publish place: 6th Conference and Exhibition on Environmental Engineering
Publish Year: 1391
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
CEE06_557
تاریخ نمایه سازی: 30 آبان 1391
Abstract:
The mercury biosorption onto powdered leaves of Eriobotrya japonica was investigated in a batch adsorption system. The metal removal was rapid, with more than 80% of total biosorption taking place in 30 min, and equilibrium was achieved at around 60 min. The maximum biosorption capacity of mercury was found to be 48.2 mg/g at optimum pH 5. The applicability of two kinetic models including pseudo-first order and pseudo-second order model was tested to elucidate the biosorption mechanism. The kinetics of biosorption followed pseudo-second order model. The Langmuir and Freundlich isotherm models were used to explain the equilibrium data for mercury-biosorbent system. The Langmuir model showed better fit of data with correlation coefficient of 0.99. The results demonstrated that the leaf powder of Eriobotrya japonica could be used as an efficient and low-cost biosorbent for the removal of mercury ions from contaminated aqueous environment.
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Authors
Mohamad Hajar
Chemical Engineering Department, AmirKabir University of Technology (Tehran Polytechnic
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