缓释作用对三价锰-焦磷酸盐/亚硫酸盐体系氧化效能的影响  

Effect of sustained-release on oxidation efficiency of trivalent manganese-pyrophosphate/sulfite system

作　　者：朱羽廷 乔俊莲[2] ZHU Yu-ting;QIAO Jun-lian(Tongji Architectural Design(Group)Co.,Ltd.,Shanghai 200092,China;College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海200092 [2]同济大学环境科学与工程学院,上海200092

出　　处：《现代化工》2024年第8期93-96,103,共5页Modern Chemical Industry

基　　金：国家重点研发计划(2021YFC3201300)。

摘　　要：利用过渡金属活化亚硫酸盐[HSO_(3)^(-)/SO_(3)^(2-),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(CaSO_(3))固态粉末替代溶解态亚硫酸钠(Na_(2)SO_(3))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/CaSO_(3)体系在氧化容量、pH适用范围等方面优于Mn(Ⅲ)-PP/Na_(2)SO_(3)体系。在pH 8.0条件下,Mn(Ⅲ)-PP/CaSO_(3)体系对有机污染物的去除率是Mn(Ⅲ)-PP/Na_(2)SO_(3)体系的1.73~2.47倍。Transition metal activated sulfite[HSO_(3)^(-)/SO_(3)^(2-),S(Ⅳ)]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(CaSO_(3))solid powder instead of dissolved sodium sulfite(Na_(2)SO_(3))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/CaSO_(3)system is better than Mn(Ⅲ)-PP/Na_(2)SO_(3)system in oxidation capacity and pH applicable scope.At a pH of 8.0,the removal efficiency of organic pollutants by Mn(Ⅲ)-PP/CaSO_(3)system is 1.73-2.47 times that by Mn(Ⅲ)-PP/Na_(2)SO_(3)system.

关 键 词：硫酸根自由基 亚硫酸钙 亚硫酸钠 缓释作用 

分 类 号：X131.2[环境科学与工程—环境科学]