血链球菌驱动的Fe^(Ⅲ)-TAML/H_(2)O_(2)体系构建及其去除水中4-氯酚  

Development of Streptococcus sanguis-driven Fe^(Ⅲ)-TAML/H_(2)O_(2)Systems to Remove 4-chlorophenol in Water

作　　者：汤宜昆 蔡喜运 TANG Yikun;CAI Xiyun(School of Environmental Science and Technology,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学环境学院,辽宁大连116024

出　　处：《湖南科技大学学报（自然科学版）》2024年第2期109-117,共9页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家重点研发计划土壤专项课题资助项目(2019YFC1803803)。

摘　　要：Fe^(Ⅲ)-TAML因能活化H_(2)O_(2)氧化多种有机污染物受到广泛关注,但在投加H_(2)O_(2)的过程中存在过度损耗的问题,并且在H_(2)O_(2)的运输、处理和储存中存在潜在危险.本研究利用血链球菌产生H_(2)O_(2)的特性,通过原位生成H_(2)O_(2)替代预制H_(2)O_(2),构建血链球菌驱动的FeⅢ-TAML/H_(2)O_(2)体系,降解水中4-氯酚,并探究相关影响因素对4-氯酚降解效果的影响.结果表明:在血链球菌驱动的Fe^(Ⅲ)-TAML/H_(2)O_(2)降解体系中,4-氯酚的降解速率常数与温度和细胞密度呈正相关,去除率随着Fe^(Ⅲ)-TAML浓度和pH值的增加先升高后降低.该体系可以实现4-氯酚的高效降解,在环境温度为25℃,pH值为8,Fe^(Ⅲ)-TAML浓度为2μmol/L,血链球菌OD600为0.4的条件下,10 mg/L的4-氯酚在3 h内的去除率可达到96.9%.Fe^(Ⅲ)-TAML has received growing attentions due to an efficient activator of H_(2)O_(2) to oxidize varieties of organic pollutants.There are many concerns about excessive losses and potential hazard of H_(2)O_(2)in the transportation,handling and storage.This study aims to construct microbial-driven Fe^(Ⅲ)-TAML/H_(2)O_(2) systems by using Streptococcus sanguis with feature of generating H_(2)O,and investigate effects of related parameters on the removal of 4-chlorophenol.Results show that in the S.sanguis-driven Fe^(Ⅲ)-TAML/H_(2)O_(2),systems,the degradation rate constants of 4-chlorophenol are positively correlated with temperature and cell density,whereas the removal of 4-chlorophenol is initially increased and subsequently decreased with increasing Fe-TAML concentrations and pH.High removal of 96.9% is achieved for 4-chlorophenol in water within 3 h under the optimized conditions,including reaction temperature of 25℃,pH 8,Fe^(Ⅲ)l-TAML of 2μmol/L and OD_(60) of 0.4.

关 键 词：血链球菌 过氧化氢 原位合成 Fe^(Ⅲ)-TAML 4-氯酚 

分 类 号：X703[环境科学与工程—环境工程]