净水技术2025，Vol.44Issue(5)：69-77,9.DOI:10.15890/j.cnki.jsjs.2025.05.008
陶瓷膜臭氧微纳米曝气工艺降解痕量毒死蜱的机制
Mechanism of Process of Ozone Micro-Nano Bubble Aeration Generated by Ceramic Membrane for Trace chlorpyrifos Degradation
摘要
Abstract
[Objective]In recent years,a large number of residual pesticides have entered the surface water and groundwater through rainwater erosion and surface runoff,which has seriously endangered the quality of water sources and human life health.Because pesticides are persistent and difficult to degrade,conventional drinking water treatment processes cannot achieve efficient removal of pesticides.Ozone is a green and high-efficient oxidant,but most ozone oxidation units in drinking water treatment plants use titanium plate aeration,and the milli-bubbles generated by it have the disadvantages of small specific surface area and low gas-liquid mass transfer efficiency,and the removal effect of pesticides is limited.[Methods]In this study,Chlorpyrifos,an organophosphorus pesticide,was taken as the target pollutant,and ceramic membrane aeration system(CA/O3)was proposed to replace the traditional titanium diffuser aeration system(TA/O3).[Results]The experimental result showed that the degradation rate of chlorpyrifos in CA/O3 system was increased by 67％～85％compared with TA/O3 system because of the advantages of ozone micro-nano bubbles such as large specific surface area and long residence time.The inlet ozone concentration significantly affected the degradation efficiency of chlorpyrifos and the ozone mass transfer rate.By LC-MS/MS,there were 10 kinds of degradation products with different retention time in CA/O3 system,and the main degradation pathways were phosphoms-sulfur double bond(P=S)oxidation,carbon-oxygen bond(C—O)cleavage and hydroxyl substitution.The acute toxicity and chronic toxicity of the degradation products were calculated by using ecological toxicity prediction model(ECOSAR)software,and the result showed that the toxicity decreased with the degradation.[Conclusion]This study shows that the ceramic membrane ozone micro-nano aeration system can effectively degrade chlorpyrifos,and effectively control the toxicity,which provides a feasible method for removing new refractory pollutants such as pesticides.关键词
臭氧微纳米曝气/陶瓷膜/毒死蜱/降解机理/毒性Key words
ozone micro-nano aeration/ceramic membrane/chlorpyrifos/degradation mechanism/toxicity分类
环境科学引用本文复制引用
韩沁雨,杜家豫,林涛,刘威..陶瓷膜臭氧微纳米曝气工艺降解痕量毒死蜱的机制[J].净水技术,2025,44(5):69-77,9.基金项目
国家重点研发计划:定向去除抗生素等的氧化-生物协同技术研发与示范(2022YFC3203702) （2022YFC3203702）
