植物-微生物电化学耦合降解底泥中氯硝柳胺的特性  

The degradation of the niclosamide in the sediment by the plant-microbial electrochemical coupled system

作　　者：黄冬根[1] 刘占京 周中敏 梁一夫 刘靖 HUANG Donggen;LIU Zhanjing;ZHOU Zhongmin;LIANG Yifu;LIU Jing(School of Resources&Environment,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学资源与环境学院,江西南昌330031

出　　处：《南昌大学学报（理科版）》2024年第3期280-287,294,共9页Journal of Nanchang University(Natural Science)

基　　金：国家自然科学基金资助项目(41967046)。

摘　　要：以植物-底泥-微生物电化学系统中氯硝柳胺的降解为研究对象,研究了外加电压、植物(菖蒲(Acorus Calamus L.)和黑麦草(Lolium Perenne L.))以及生物表面活性剂(鼠李糖脂)对氯硝柳胺降解的影响。研究结果表明:外加适量的直流电压可以对底泥-微生物电化学系统中氯硝柳胺的降解产生一定的促进作用,1.2 V外加电压作用下的底泥-微生物电化学耦合系统中氯硝柳胺降解的半衰期比0.2 V减少了11.59%;植物对底泥中氯硝柳胺降解具有促进作用,1.2 V电压作用下的菖蒲和黑麦草微生物电化学耦合系统氯硝柳胺降解半衰期比无植物时分别减少7.43%和1.58%;外加适量的鼠李糖脂对于底泥中氯硝柳胺的降解具有促进作用,外加1.2 V电压,在且菖蒲-底泥-微生物电化学耦合系统中加入0.50 g·kg^(-1)鼠李糖脂,氯硝柳胺降解半衰期最小,比不加入鼠李糖脂减少26.45%。耦合系统中的氯硝柳胺通过生成2-氯-4-硝基苯胺、5-氯水杨酸等中间产物逐渐降解,最终生成CO_(2)、H_(2)O等。This study focused on the degradation of the niclosamide in the plant-sediment-microbial electrochemical coupled system and investigated the effects of the applied voltage,the plants(Acorus Calamus L.and Lolium Perenne L.)and the biosurfactant(rhamnolipids)on chloramphenicol degradation.The results showed that a proper applied DC voltage could promote the degradation of the niclosamide in the sediment-microbial electrochemical coupled system.The half-life period of the niclosamide in the sediment-microbial electrochemical coupled system under 1.2 V was 11.59%shorter than that under 0.2 V.The degradation of the niclosamide in the sediment-microbial electrochemical coupled system was contributed by the plants.The degradation of the niclosamide under 1.2 V in the Acorus Calamus L.-sediment-microbial electrochemical coupled system and in the Lolium Perenne L.-sediment-microbial electrochemical coupled system was 7.43%and 1.58%shorter than those in the sediment-microbial electrochemical coupled system without any plant,respectively.The addition of an appropriate amount of rhamnolipid promoted the degradation of chloramphenicol in sediment.When 0.50 g·kg^(-1)of rhamnolipid was added to the Acorus Calamus L.-sediment-microbe electrochemical coupling system under 1.2 V applied voltage,the half-life of chloramphenicol degradation was minimized,reduced by 26.45%compared to without rhamnolipid.In the degradation process,the niclosamide in the coupled system was transformed into the 2-Chloro-4-nitroaniline,the 5-Chlorosalicylic acid,and other intermediate products,then finally to CO_(2),H_(2)O,etc.

关 键 词：微生物电化学系统 植物-微生物电化学耦合系统 生物表面活性剂 氯硝柳胺 生态环境治理 

分 类 号：X592[环境科学与工程—环境工程]