碱活化过一硫酸盐氧化去除剩余污泥中三氯生  

Triclosan removal from excess sludge by alkali activated peroxymonosulfate oxidation

作　　者：赵爽 宋秀兰[1] 崔香玉 ZHAO Shuang;SONG Xiulan;CUI Xiangyu(College of Environmental Science and Engineering,Taiyuan University of Technology,Jinzhong 030600,China;Zhoukou Ecological Environment Bureau,Zhoukou 466000,China)

机构地区：[1]太原理工大学环境科学与工程学院,山西晋中030600 [2]周口市生态环境局,河南周口466000

出　　处：《化工环保》2024年第5期674-683,共10页Environmental Protection of Chemical Industry

基　　金：山西交通科学研究院集团有限公司技术委员会创新发展项目(21-JKCF-61);山西省应用基础研究计划项目(201901D111067)。

摘　　要：采用碱活化过一硫酸盐(PMS)氧化去除剩余污泥中三氯生(TCS),考察了TCS去除效果的影响因素,探究了TCS的去除机理,并揭示了TCS的可能降解路径。实验结果表明,在PMS投加量为23 mmol/L、初始pH为11、反应时间为120 min的优化条件下,TCS去除率可达84.95%。3D-EEM和FTIR分析表明,碱活化PMS生成的活性物种能够破坏胞外聚合物的官能团,促使TCS从固相释放到液相中。自由基鉴别实验结果表明,碱活化PMS氧化降解TCS的主要活性物种为单线态氧(^(1)O_(2))和超氧自由基(·O_(2)^(-))。通过LC-MS技术识别了TCS降解的7种中间产物,并据此推测出TCS降解的3种可能路径,包括羟基化、水解和脱氯反应。In this paper,alkali activated peroxymonosulfate(PMS)oxidation process was utilized to remove triclosan from sludge.The influencing factors of the triclosan(TCS)removal effect were investigated and the degradation mechanism and pathway of TCS in alkali activated PMS system were analyzed.The results show that the removal rate of TCS in sludge is up to 84.95%under the optimum conditions of initial pH 11,PMS concentration of 23 mmol/L and reaction time of 120 min.According to 3D-EEM and FTIR analysis,active species produced in alkali activated PMS oxidation process destroyed the functional groups of the extracellular polymeric substance,promoting the release of TCS from the solid phase into the liquid phase.Radical scavenger experiments indicate that singlet oxygen(^(1)O_(2))and superoxide radicals(·O_(2)^(-))are the primary active substances responsible for TCS oxidative degradation.Based on the identification of 7 intermediate TCS degradation products by LC-MS technique,three possible pathways of TCS degradation were hypothesized,including hydroxylation,hydrolysis,and dechlorination.

关 键 词：剩余污泥 过一硫酸盐 三氯生 高级氧化 碱 

分 类 号：X705[环境科学与工程—环境工程]