环境工程学报2025，Vol.19Issue(1)：167-177,11.DOI:10.12030/j.cjee.202407072
污泥生物炭耦合臭氧氧化去除渗滤液中多种药物类污染物
The removal of multiple pharmaceuticals from leachates by sludge biochar combined with ozonation
摘要
Abstract
Ozone(O3),as an common oxidant,is extensively applied in advanced oxidation processes.Adding catalysts can activate ozone to generate reactive oxygen species(ROS),such as hydroxyl radicals(OH),thereby enhancing the efficiency of wastewater treatment.However,there is limited researches on the efficiency and mechanism of sludge derived biochar catalyzed ozonation(SDBC/O3)for pharmaceutically active compounds(PhACs)removal from leachates.In this study,SDBC was prepared through high temperature pyrolytic cracking method,and SDBC/O3 was used to remove typical PhACs in leachates,such as sulfonamide antibiotics of sulfamethoxazole(SMX),the quinolone antibiotics of ciprofloxacin(CIP),the tetracycline antibiotics of tetracycline(TTC),and the antiepileptic drugs of carbamazepine(CBZ).The results showed that under unadjusted pH conditions(pH=7.8),all the PhACs could be rapidly removed by SDBC/O3 from leachates,with the removal efficiency exceeding 90％in 30 min,which is significantly higher than O3 or SDBC alone.This indicated that SDBC/O3 could well treat the micropollutants in the leachates.The effect of pH investigation revealed that higher removal efficiency occurred at neutral and alkaline pHs than acidic pHs,likely due to the unfavorable environment for ozone decomposition into reactive oxygen species and easy production of repulsion between pollutants and biochar in acidic water.Quenching experiments and electron paramagnetic resonance(EPR)indicated that the primary reactive species in the system were O2·-and singlet oxygen 1O2,and 1O2 played the major role in removing PhACs.The C=O and Fe2+on SDBC were the dominant reactive sites for O3 activating.This research elucidates the mechanism of SDBC/O3 removing PhACs in leachates and provides a theoretical and technical support for treating organic micropollutants in leachates.关键词
污泥生物炭/臭氧/渗滤液/药物Key words
sludge biochar/ozone/leachate/pharmaceuticals分类
资源环境引用本文复制引用
余阳,王园园,阮仁伟,钱雅洁..污泥生物炭耦合臭氧氧化去除渗滤液中多种药物类污染物[J].环境工程学报,2025,19(1):167-177,11.基金项目
国家自然科学基金资助项目(52170069) （52170069）
上海市青年科技启明星计划(21QC1400500) （21QC1400500）
