Preparation and evaluation of orange peel xanthate for effective removal of heavy metals from aqueous solutions
首发时间:2009-04-02
Abstract:The preparation of orange peel xanthate and its adsorption behaviors of heavy metals: Cu2+, Cd2+, Pb2+, Zn2+, Ni2+ were studied. FTIR spectrum and zeta potentials were used to characterize the prepared orange peel xanthate. Effects of various parameters including equilibrium pH, initial ion concentration and contact time on the adsorption processes for the five metal ions were investigated. For all five metal ions, adsorption isotherms were found to fit Langmuir model and the maximum adsorption capacities of Cu2+, Cd2+, Pb2+, Zn2+ and Ni2+ were obtained as 77.60, 76.57, 218.34, 49.85 and 15.45 mg•g-1, respectively. All adsorption processes can attain equilibrium within 20 min and kinetics was well fitted by psesudo-second order equation. It is proposed that the adsorption mechanism was complexation.
keywords: Orange peel xanthate Adsorption Heavy metals
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用于从水溶液有效去除重金属的橘子皮黄原酸酯的制备和评估
摘要:本文研究了橘子皮黄原酸酯的制备及其对Cu2+, Cd2+, Pb2+, Zn2+, Ni2+的吸附行为。采用FTIR光谱和zeta电位表征制备的橘子皮黄原酸酯。考察了不同的因素如平衡pH值、初始离子浓度和时间对5种离子吸附过程的影响。全部5种离子的等温吸附都符合Langmuir等温吸附方程,且 Cu2+, Cd2+, Pb2+, Zn2+ 和Ni2+的最大吸附量分别为:77.60, 76.57, 218.34, 49.85 and 15.45 mg•g-1。所有的离子的吸附过程都能在20分钟内达到平衡,且动力学遵循准二级动力学方程。吸附机理为配合反应。
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No.3102523661512386****
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