Uranium Removal from Aqueous Solution by Banyan Leaves: Equilibrium, Thermodynamic, Kinetic, and Mechanism Studies
Uranium Removal from Aqueous Solution by Banyan Leaves: Equilibrium, Thermodynamic, Kinetic, and Mechanism Studies
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DOI：
10.1061/(asce)ee.1943-7870.0000695
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发表时间：
2013-06
影响因子：
2.2
通讯作者：
Liangshu Xia;Kaixuan Tan;Xiao Wang;Weina Zheng;Wenjuan Liu;C-F Deng
中科院分区：
文献类型：
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作者：
Liangshu Xia;Kaixuan Tan;Xiao Wang;Weina Zheng;Wenjuan Liu;C-F Deng
AbstractBiosorption is an effective and economic method to treat wastewater containing low concentrations of uranium pollutants. In this study, banyan leaves (BLs) were used as a biosorbent to adsorb uranium ions. The biosorption behavior, thermodynamics, and kinetics of this adsorption process, as well as its mechanism, were investigated. The results indicated that the optimal adsorption effect was achieved when the initial pH was 3.0, the initial uranium concentration was 100 mg L−1, the absorbent dosage was 5 g L−1, and the temperature was chosen to be 293 K. The biosorption rate could be described better by a pseudo-second-order model than a pseudo-first-order model, an Elovich kinetic model, and a double-constant speed kinetic model. The adsorption of uranium(VI) ions proceeded very rapidly in the first 30 min, which subsequently slowed down, and finally reached equilibrium after 50 min. The biosorption isotherm of uranium adsorbed onto BLs could be described better by Freundlich isotherm than Lang...
