摘要：

以复合污染废水中有机砷[洛克沙胂(ROX)]及其降解产物无机砷[As(Ⅲ)/As(Ⅴ)]为研究对象，探讨了多功能处理剂高铁酸钾去除砷类复合污染废水的技术与机理。结果表明，最佳去除条件：pH为4，温度为30℃，铁砷质量比为10：1，反应时间为8 h，调节pH的碱性物质为Ca(OH)₂，此条件下，无机总砷去除率达到96.66%，ROX去除率达到66.38%。氧化动力学研究结果表明，表观二级反应动力学速率常数为0.000 18，相关系数为0.906 03。

关键词: 高铁酸钾, 洛克沙胂, As(Ⅲ)/As(Ⅴ), 氧化, 吸附

Abstract:

Taking the organic arsenic(ROX) and its degradation product inorganic arsenic[As(Ⅲ)/As(Ⅴ)] as the research object, the multi-functional treatment agent potassium ferrate was used to discuss removal technology and mechanism of arsenic in polluted wastewater. The results showed that the optimal removal conditions were as follows:pH value 4, temperature 30℃, iron-arsenic mass ratio 10:1, reaction time 8 h, and the alkaline substance Ca(OH)₂ used to adjust pH. Oxidation kinetics studies showed that the apparent secondary reaction kinetic rate constant is 0.000 18 and the correlation coefficient is 0.906 03.

Key words: potassium ferrate, roxarsine, As(Ⅲ)/As(Ⅴ), oxidation, adsorption

中图分类号: 

• X703.1