利用过渡金属活化亚硫酸盐[HSO^-₃/SO^2-₃,S(Ⅳ)]生成SO^-₄·可实现对水中有机污染物的去除。S(Ⅳ)不仅能够生成SO^-₄·,同时也能消耗SO^-₄·。选用缓释型亚硫酸钙(CaSO₃)固态粉末替代溶解态亚硫酸钠(Na₂SO₃)溶液,通过缓慢释放S(Ⅳ)削弱S(Ⅳ)对SO^-₄·的竞争消耗。结果表明,Mn(Ⅲ)-PP/CaSO₃体系在氧化容量、pH适用范围等方面优于Mn(Ⅲ)-PP/Na₂SO₃体系。在pH 8.0条件下,Mn(Ⅲ)-PP/CaSO₃体系对有机污染物的去除率是Mn(Ⅲ)-PP/Na₂SO₃体系的1.73~2.47倍。

Transition metal activated sulfite can be used to generate SO^·-₄ to remove organic pollutants from water.It is suggested that S(Ⅳ) serves as a "source" for SO^·-₄ production,also as a "sink" for SO^·-₄ consumption.As a result,sustained-release calcium sulfite (CaSO₃) solid powder instead of dissolved sodium sulfite (Na₂SO₃) solution is used to control the concentration of S(Ⅳ) at a lower level in the reaction system.Study results show that Mn(Ⅲ)-PP/CaSO₃ system is better than Mn(Ⅲ)-PP/Na₂SO₃ system in oxidation capacity and pH applicable scope.At a pH of 8.0,the removal efficiency of organic pollutants by Mn(Ⅲ)-PP/CaSO₃ system is 1.73-2.47 times that by Mn(Ⅲ)-PP/Na₂SO₃ system.

朱羽廷(1986-),男,博士生,高级工程师,主要从事高级氧化技术研究与应用,15021248600@126.com;乔俊莲(1969-),女,博士,副教授,研究方向为高级氧化技术在水处理中的应用,通讯联系人,qiaoqiao@tongji.edu.cn。