Mechanisms regarding the enhanced degradation of chlorinated organophosphates by ultrasound-assisted thermally activated persulfates
LEI Hui-hui1, WANG Xiao-fei1, WANG Chao-yi1, WANG Ya-wei1, WANG Xue-dong1, KONG Ling-zhao1, QIN Hong-bing2, WANG Jun-xia1
1. School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China; 2. Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
Abstract：A heat-coupled ultrasonic activated persulfate (Heat/US/PDS) oxidation degradation technology of tri (2-chloroethyl) phosphate (TCEP) was established in this study. The reaction parameters were optimized by the central combination design method (CCD) of the response surface (RSM). The reaction parameters of TCEP removal in this system were more moderate (ultrasonic power was 402.5W, temperature was 52.6℃, reaction time was 120min), and the degradation rate of TCEP was predicted to reach 95.3%. Both coexisting ions and humic acids inhibited the removal of TCEP, and the degradation rate of TCEP was 76% in the four water bodies. Radical quenching experiments and EPR analysis showed that SO4·- and ·OH were the main reactive oxygen species. Five possible degradation intermediates of TCEP were detected. Zebrafish embryo exposure experiment showed that TCEP was safe to react in aqueous solution in this system, and the ecotoxicity of TCEP and its possible products to large fleas, algae and fish was evaluated, and the ecotoxicity of degradation products to aquatic organisms was low.
雷慧慧, 王孝飞, 王超毅, 王亚威, 王学东, 孔令照, 秦宏兵, 王俊霞. 超声增强热活化过硫酸盐降解氯代有机磷酸酯的机理探究[J]. 中国环境科学, 2024, 44(9): 4939-4947.
LEI Hui-hui, WANG Xiao-fei, WANG Chao-yi, WANG Ya-wei, WANG Xue-dong, KONG Ling-zhao, QIN Hong-bing, WANG Jun-xia. Mechanisms regarding the enhanced degradation of chlorinated organophosphates by ultrasound-assisted thermally activated persulfates. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(9): 4939-4947.
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