化工进展2024，Vol.43Issue(8)：4704-4713,10.DOI:10.16085/j.issn.1000-6613.2023-1247
硫化零价铁-微生物复合吸附剂对磷酸三(2-氯乙基)酯的吸附-降解机制
Adsorption-degradation mechanism of tris(2-chloroethyl)phosphate by a composite adsorbent of zero-valent iron sulfide and microorganism
摘要
Abstract
Chlorinated organophosphate flame retardants(Cl-OPFRs),a new type of pollutant,are widely detected in environment and has resistant to degradation,easy-migratory and biological toxicity.Tris(2-chloroethyl)phosphate(TCEP)with the highest detection rate in environment was chosen as the target pollutant in this study,and a composition adsorbent(named S/ZVI-N1)that prepared by zero-valent iron sulfide and Novosphingobium tardaugens was used as research material,to explore the removal performance and degrading pathway of TCEP by the S/ZVI-N1.The results showed that the removal of TCEP by S/ZVI-N1 fitted to the quasi-first-order kinetic equation and Langmuir model,which indicated this process was a physical adsorption of monolayer primarily and the R2 of quasi-second-order kinetic equation also proved the chemical adsorption.The removal rate of TCEP by S/ZVI-N1 was 58.9%after 12h,which was higher significantly than that by Novosphingobium tardaugens or S/ZVI only(biodegradation rate was 32.95%and S/ZVI removal rate was 31.2%).The analysis of degradation products indicated that the decomposition of TCEP by S/ZVI-N1 was more thorough than that by ZVI alone.This proved there was synergistic reaction between the S/ZVI and Novosphingobium tardaugens to remove TCEP,and the optimal conditions of TCEP removal was pH 5-7 and 30-35℃.The intermediates analysis could deduce two degradation pathways of TCEP by S/ZVI-N1,that one was the C—Cl bond broken down by S/ZVI and another was O—P bond broken down by Novosphingobium tardaugens,and the final products were triethyl phosphate(TEP)and H3PO4,which meant the completely degradation of TCEP.关键词
氯代有机磷阻燃剂/复合吸附剂/微生物降解/硫化零价铁/降解途径/磷酸三(2-氯乙基)酯Key words
chlorinated organophosphate flame retardants/composited adsorbent/bio-degradation/zero-valent iron sulfide/degradation pathway/tris(2-chloroethyl)phosphate分类
资源环境引用本文复制引用
黄鸿,欧阳浩民,杨依静,李昌霖,陈烁娜..硫化零价铁-微生物复合吸附剂对磷酸三(2-氯乙基)酯的吸附-降解机制[J].化工进展,2024,43(8):4704-4713,10.基金项目
岭南现代农业科学与技术广东省实验室河源分中心自主科研项目(DT20220016) （DT20220016）
河源市科技计划(河科2021001) （河科2021001）
广东省自然科学基金青年提升项目(2023A1515030284) （2023A1515030284）
岭南现代农业科学与技术广东省实验室河源分中心双聘团队项目(DT20220002). （DT20220002）
