Synergistic effects of peroxydisulfate on UV/O_(3) process for tetracycline degradation:Mechanism and pathways  

作　　者：Fengrui Yang Debing Wang Xinying Zhang Jie Zhang Zhichao Wu Qiaoying Wang 

机构地区：[1]State Key Laboratory of Pollution Control and Resource Reuse,Shanghai Institute of Pollution Control and Ecological Security,School of Environmental Science and Engineering,Tongji University,Shanghai 200092,China [2]Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology,College of Environment&Safety Engineering,Fuzhou University.Fuzhou 350108,China

出　　处：《Chinese Chemical Letters》2024年第10期408-413,共6页中国化学快报（英文版）

基　　金：financial support from the National Natural Foundation of China(Nos.52370045 and 51838009);Natural Science Foundation of Shanghai(No.23ZR1467500),and Shanghai Rising-Star Program(No.20QC1400300)。

摘　　要：Tetracycline(TC)as a typical emerging pollutant is becoming a serious threat to the environment and human health.A combined advanced oxidation technology of UV/Ozone(O_(3))/peroxydisulfate(PDS)process was developed to explore an efficient and economic treatment process of TC in wastewater.Furthermore,the reactive sites and transformation pathways of TC were explored and the toxicity of the intermediates was quantified with a quantitative structure-activity relationship(QSAR)assessment.The degradation performance of TC was substantially enhanced in UV/O_(3)/PDS process with a kobsof 0.0949 min-1,which was 2.3 times higher than UV/O_(3)and 3.2 times than sole UV.The results demonstrated that there was a superior synergistic effect of PDS on UV/O_(3)processes for the degradation of TC.Electron paramagnetic resonance(EPR)analysis and quenching experiments show that·OH,SO_(4)·-,O_(2)·-and1O_(2)all contributed to TC degradation in the UV/O_(3)/PDS process and exhibited a synergistic effect,which inhibited the generation of harmful products.In addition,the UV/O_(3)/PDS system can effectively degrade TC in a wide range of substrate concentrations and pH,and also showed excellent adaptability to various concentrations of anions(Cl-and HCO_(3)-).This study proves the feasibility of UV/O_(3)/PDS process for treating TC contaminated wastewater with complicated water matrix.

关 键 词：UV/ozonation/peroxydisulfate Synergistic effect TETRACYCLINE DEGRADATION Wastewater 

分 类 号：TQ031.7[化学工程] X703[环境科学与工程—环境工程]