Mn_(2)O_(3)活化PMS降解染料AO7效果及机理  

Effect and Mechanism of Dye AO7 Degradation by Mn_(2)O_(3)Activated PMS

作　　者：李亚峰[1] 刘奕含 李姝 LI Yafeng;LIU Yihan;LI Shu(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《水处理技术》2024年第11期45-50,共6页Technology of Water Treatment

基　　金：国家水体污染控制与治理科技重大专项(2018ZX07601-001)。

摘　　要：试验研究了三氧化二锰(Mn_(2)O_(3))活化过一硫酸盐(PMS)体系降解酸性染料AO7的效果,考察了不同因素对降解效果的影响,并采用响应曲面法确定最佳试验条件。结果表明,在pH=3.4、Mn_(2)O_(3)投加量为42.6 mg、PMS投加量为248.3 mg/L、反应时间为60 min的条件下,脱色率为95.84%,COD去除率为85.79%。为进一步分析Mn_(2)O_(3)活化PMS机理,利用甲醇和叔丁醇确定活化体系中自由基的种类,发现在处理中发挥主要作用的活性自由基是SO_(4)·^(-)。The degradation of acid dye AO7 by manganese(Ⅲ)oxide activated permonosulfate(PMS)system was studied.The effects of different factors on the degradation were investigated and the optimum conditions were determined by response surface methodology.The results showed that the decolorization rate was 95.84%and COD removal rate was 85.79%under the conditions of pH=3.4,Mn_(2)O_(3)=42.6 mg,PMS=248.3 mg/L and 60 min.The reusability of the activator Mn_(2)O_(3)and the mechanism of activating PMS were further analyzed.The kinds of free radicals in the activated system were determined by using methanol and tert-butanol.

关 键 词：过硫酸盐 染料废水 高级氧化 Mn_(2)O_(3) 

分 类 号：X703.1[环境科学与工程—环境工程] X791