化学工程2025，Vol.53Issue(11)：7-12,6.DOI:10.3969/j.issn.1005-9954.2025.11.002
黑药脱除废水中共存重金属Cu、Zn和Cd机理研究
Mechanism of coexisting heavy metals Cu,Zn and Cd removal from wastewater using dithiophosphate
韩敬瑞 1王彦军 1张旗1
作者信息
- 1. 沈阳有色金属研究院有限公司,辽宁 沈阳 110141
- 折叠
摘要
Abstract
The removal mechanism of coexisting heavy metals Cu,Zn and Cd in acid industrial wastewater was investigated by using dithiophosphate as heavy metal capturing agent.Structural characterization of capturing agent and its chelate using FT-IR and XPS was employed to reveal the active group—P(=S)S—in dithiophosphate and its coordination mechanism with heavy metals.By constructing coexisting metal system,the deposition sequence of heavy metals was obtained as follows:Cu2+＞Cd2+＞Zn2+.The valence bond theory and Lewis acid-base theory were used to analyze the mechanism from the aspects of complex orbital type,electron acceptance ability and hard-soft-acid-base.Besides,because of the adsorption electrostatic neutralization of negative chelate on metal ions and the enlarged multi-metal chelates,the precipitation performance was improved,resulting in better removal of coexisting heavy metals than single metal system.Mechanism research reveals the interaction patterns between dithiophosphate and coexisting heavy metals,providing an important theoretical basis for the further applications.关键词
捕集剂/黑药/共存重金属/沉积顺序机理/螯合物Key words
capturing agent/dithiophosphate/coexisting heavy metals/deposition sequence mechanism/chelate分类
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韩敬瑞,王彦军,张旗..黑药脱除废水中共存重金属Cu、Zn和Cd机理研究[J].化学工程,2025,53(11):7-12,6.
