Adsorption of Pb2+ and Zn2+ from aqueous solutions by sulfured orange peel
首发时间:2010-12-14
Abstract:In this study, sulfured orange peel (MOP) was used as adsorbent to investigate its adsorption behaviors of lead and zinc ions from aqueous solutions. The effects of solution pH, adsorption time and metal ion concentration on adsorption were studied in batch experiments. Both adsorption kinetics of Pb2+ and Zn2+ proceeded rapidly and could be well described by pesudo-second-order equation. The maximum Langmuir adsorption capacities for Pb2+ and Zn2+ removal by MOP were evaluated as 163.93 and 80.06 mg/g, respectively. A binary mixture of Pb2+ and Zn2+ was studied by using a packed column, suggesting that effective mutual separation and pre-concentration of Pb2+ away from Zn2+ using MOP could be satisfactory achieved. The results indicate that sulfured orange peel could be employed as an effective low-cost adsorbent for adsorption and separation of Pb2+ and Zn2+ from wastewater.
keywords: Sulfured orange peel Adsorption Pb2+ Zn2+
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硫化橘子皮从水溶液中吸附Pb2+和Zn2+
摘要:本文研究了硫化改性橘子皮(MOP)作为吸附剂对溶液中铅锌离子的吸附行为。采用静态吸附实验考察了溶液pH值、吸附时间和金属离子浓度的影响。MOP对Pb2+和Zn2+的吸附速度都很快,吸附动力学均符合准二级动力学方程。MOP对Pb2+和Zn2+的Langmuir 最大吸附量分别为163.93 和80.06 mg/g。采用动态柱吸附实验探索了MOP对铅锌混合溶液的分离行为,结果表明在低pH条件下微量的Pb2+可以从高浓度的Zn2+中进行分离并富集。实验结果表明硫化橘子皮是有效的廉价吸附剂,可以实验从废水中吸附分离Pb2+和Zn2+.
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No.4395638236615129****
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