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一种重金属螯合剂的制备及其性能

Keywords: 螯合剂,重金属离子,废水处理

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Abstract:

采用聚丙烯酰胺和磺胺在碱性条件下合成了一种新型的重金属螯合剂—PAS,并对合成原料PAM和产物PAS进行了红外光谱和紫外光谱表征,分析结果表明,PAS中有N—C—S和C=S生成。将PAS用于重金属离子的螯合实验,研究了温度、pH和初始浓度对PAS去除镍离子性能的影响,用PAS处理100mg/L的Cu2+、Zn2+、Cd2+和Pb2+的单个离子模拟废水,去除率最高分别可达到90%、96%、99%和99%。用PAS处理含Pb2+、Cd2+、Zn2+和Cu2+混合废水,去除顺序为Pb2+>Cd2+>Zn2+>Cu2+。PAS对重金属离子具有很好的螯合效果,应用前景广阔。

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