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首页> 外文期刊>Journal of Hazardous Materials >Selective removal of heavy metal ions by disulfide linked polymer networks
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Selective removal of heavy metal ions by disulfide linked polymer networks

机译：通过二硫键连接的聚合物网络选择性去除重金属离子

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摘要

Heavy metal contaminated surface water is one of the oldest pollution problems, which is critical to ecosystems and human health. We devised disulfide linked polymer networks and employed as a sorbent for removing heavy metal ions from contaminated water. Although the polymer network material has a moderate surface area, it demonstrated cadmium removal efficiency equivalent to highly porous activated carbon while it showed 16 times faster sorption kinetics compared to activated carbon, owing to the high affinity of cadmium towards disulfide and thiol functionality in the polymer network. The metal sorption mechanism on polymer network was studied by sorption kinetics, effect of pH, and metal complexation. We observed that the metal ions-copper, cadmium, and zinc showed high binding affinity in polymer network, even in the presence of competing cations like calcium in water. (C) 2017 Elsevier B.V. All rights reserved.
机译：重金属污染的地表水是最古老的污染问题之一，对生态系统和人类健康至关重要。我们设计了二硫键连接的聚合物网络，并用作从污染水中去除重金属离子的吸附剂。尽管聚合物网络材料的表面积适中，但由于镉对聚合物中二硫键和硫醇官能团的高亲和力，因此它显示出的镉去除效率与多孔活性炭相当，而吸附动力学则比活性炭快16倍。网络。通过吸附动力学，pH值和金属络合作用研究了金属在聚合物网络上的吸附机理。我们观察到，即使在水中存在竞争性阳离子（如钙）的情况下，金属离子-铜，镉和锌在聚合物网络中也显示出高结合亲和力。 （C）2017 Elsevier B.V.保留所有权利。

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