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沸石负载淀粉对Pb2+、Cu2+和Ni2+的吸附性能

Keywords: 沸石负载淀粉,,,,吸附

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Abstract:

将淀粉负载到沸石表面得到新型重金属离子复合吸附剂ZLS。分别从沸石与淀粉质量比、吸附温度、吸附时间、pH与重金属初始浓度不同方面考察了复合吸附剂ZLS吸附Pb2+、Cu2+、Ni2+的影响。实验结果表明:当沸石与淀粉质量比为10:1,pH为6,吸附温度在30℃时,复合型吸附剂ZLS对Pb2+、Cu2+和Ni2+3种重金属离子的吸附效果最好;吸附动力学研究发现,ZLS对Pb2+、Cu2+和Ni2+的吸附行为均符合准二级动力学以及颗粒内部扩散模型;等温吸附数据符合Freundlich模型,吸附状态属于多层吸附。

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