Enhanced triallyl isocyanurate(TAIC)degradation through application of an 03/UV process:Performance optimization and degradation pathways  

作　　者：Yapeng Song Hui Gong Jianbing Wang Fengmin Chang Kaijun Wang 

机构地区：[1]State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China [2]School of Chemical&Environmental Engineering,China University of Mining and Technology,Beijing 100083,China

出　　处：《Frontiers of Environmental Science & Engineering》2020年第4期103-113,共11页环境科学与工程前沿（英文）

基　　金：This work was supported by the Major Science and Technology Program for Water Pollution Control and Treatment of China(Nos.2018ZX07105004 and 2018ZX07105003).

摘　　要：Triallyl isocyanurate(TAIC,C12H15N3O3)has featured in wastewater treatment as a refractory organic compound due to the significant production capability and negative environmental impact.TAIC degradation was enhanced when an ozone(O3)/ultraviolet(UV)process was applied compared with the application of an independent O3 process.Although 99%of TAIC could be degraded in 5 min during both processes,the O3/UV process had a 70%mineralization rate that was much higher than that of the independent O3 process(9%)in 30 min.Four possible degradation pathways were proposed based on the organic compounds of intermediate products identified during TAIC degradation through the application of independent 03 and O3/UV processes.pH impacted both the direct and indirect oxidation processes.Acidic and alkaline conditions preferred direct and indirect reactions respectively,with a pH of 9 achieving maximum Total Organic Carbon(TOC)removal.Both CO32-and HCO3-decreased TOC removal,however only CO32-negatively impacted TAIC degradation.Effects of Cl-as a radical scavenger became more marked only at high concentrations(over 500 mg/L Cl-).Particulate and suspended matter could hinder the transmission of ultraviolet light and reduce the production of HO·accordingly.

关 键 词：Triallyl isocyanurate O3/UV Advanced oxidation processes(AOP) Degradation pathway 

分 类 号：X703.5[环境科学与工程—环境工程]