金属组学方法识别水中络合态重金属形态及其吸附净化技术研究进展

Research Progress on Identification of Heavy Metal Complexes in Water by Metallomics and Its Purification Technologies by Adsorption

Cu^(2+)、Pb^(2+)和Ni^(2+)等重金属离子可与水中乙二胺四乙酸、柠檬酸、酒石酸等有机分子形成络合态重金属。相比于游离态离子,络合态重金属具有更高的水溶性和环境毒性,在广泛的pH值范围内稳定存在且形态复杂,难以通过化学沉淀等常规方法高效去除。对近年来基于金属组学方法的水中络合态重金属复杂形态分析方法进行总结,对吸附净化技术在络合态重金属废水处理中的研究进展进行综述,并对上述领域需要解决的问题进行了探讨和展望。

Heavy metal ions such as Cu^(2+),Pb^(2+)and Ni^(2+)can form complexes with certain organic molecules in water,including ethylenediaminetetraacetic acid(EDTA),citric acid,tartaric acid,and so on.Compared with the free ions,the heavy metal complexes have higher water solubility and environmental toxicity.They can exist in water with stable complex forms in a wide range of pH,making them difficult to be removed efficiently by traditional methods such as chemical precipitation.In this article,the recent advances in speciation analysis of heavy metal complexes in wastewater based on metallomics methods were summarized,the research progress of adsorption purification techniques in the treatment of heavy metal complexes contained in wastewater was reviewed,and the problems that need to be addressed in the above fields were explored and prospected.