卡马西平对藻菌体系锰氧化进程的影响及机制  

Effects and mechanisms of carbamazepine on manganese oxidation process in algae-bacteria systemEffects and mechanisms of carbamazepine on manganese oxidation process in algae-bacteria system

作　　者：高珊珊 张长禄 王茜[2] 倪蓉 吴佳萍 戚菁[2] 胡承志[2] GAO Shanshan;ZHANG Changlu;WANG Xi;NI Rong;WU Jiaping;QI Jing;HU Chengzhi(School of Civil and Transportation,Hebei University of Technology,Tianjin 300401,China;Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]中国科学院生态环境研究中心,环境水质学国家重点实验室,北京100085

出　　处：《环境工程学报》2024年第7期1812-1819,共8页Chinese Journal of Environmental Engineering

基　　金：国家自然科学面上基金资助项目(52170014)。

摘　　要：随着工农业的发展,新污染物在水体中的检出率越来越高,严重威胁到饮用水安全。滤池作为一种运维简单的绿色水处理工艺被广泛应用,它能够依靠滤料吸附和藻菌协同作用有效去除新污染物。为了明晰新污染物对滤池中的藻菌体系的影响从而充分发挥藻菌体系对新污染物的去除作用,本研究选取铜绿微囊藻和锰氧化菌QJX^(-1)组成的藻菌体系作为研究对象,卡马西平(CMZ,carbamazepine)作为新污染物代表,以对新污染物有去除能力的生物锰氧化物为切入点,全面研究了CMZ的去除效果和CMZ对该藻菌体系锰氧化的影响。研究发现:在铜绿微囊藻和QJX^(-1)组成的藻菌体系中,生物锰氧化物对CMZ的氧化能力为6.334μg·g^(-1),吸附能力为4.170μg·g^(-1);藻和细菌细胞对CMZ的生物降解能力为1.307μg·g^(-1),细胞吸附能力为0.245μg·g^(-1),两者均表现出对CMZ的去除能力。CMZ对藻菌体系锰氧化的影响表现出低浓度促进(5μg·L^(-1)、50μg·L^(-1)),高浓度抑制(500μg·L^(-1)、5000μg·L^(-1))的现象。进一步从锰氧化机制入手深入研究,发现低浓度的CMZ可以促进藻菌体系产生超氧自由基,对比不加入CMZ的藻菌体系,超氧自由基发光强度提升了4000~6000 CLU,进而加快了该藻菌体系的锰氧化进程。本研究从CMZ对藻菌体系锰氧化进程的影响以及影响机制进行了一系列探究,为明晰新污染物对藻菌体系的影响以及充分利用藻菌体系提高滤池的净水效能提供了较好的理论依据。With the development of industry and agriculture,the detection rate of emerging contaminants in water is increasing,which seriously threatens the safety of drinking water.As an environmentally friendly water treatment process with simple operation and maintenance,the filters are widely used,which can effectively remove emerging contaminants by adsorption of filter media and synergistic effect of algae and bacteria.In order to clarify the effect of emerging contaminants on the algae-bacteria system in the filters and to give full play to the removal of emerging contaminants by the algae-bacteria system,this study selected the algae-bacteria system composed of Microcystis aeruginosa and manganese oxidizing bacterium QJX-1 as the object of the study,and carbamazepine(CMZ)as the representative of emerging contaminants,and the biological manganese oxide,which has the ability of removing emerging contaminants,were used as the starting point,comprehensively explored the removal of the CMZ and the effect of CMZ on manganese oxidation in the algaebacteria system.It was found that in the algae-bacteria system composed of Microcystis aeruginosa and QJX-1,the oxidizing capacity of biological manganese oxide on CMZ was 6.334μg·g^(-1)and its adsorption capacity was4.170μg·g^(-1);the biodegradation capacity of algae and bacteria cells on CMZ was 1.307μg·g^(-1),and the adsorption capacity of the cells was 0.245μg·g^(-1),both of them showed the removal capacity on CMZ.The effect of CMZ on the process of manganese oxidation of the system showed the phenomenon of promotion at low concentrations(5μg·L^(-1),50μg·L^(-1))and inhibition at high concentrations(500μg·L^(-1),5000μg·L^(-1)).Further study from the manganese oxidation mechanism found that the low concentration of CMZ could promote the generation of superoxide radicals in the system,and compared with the system without CMZ,the luminescence intensity of superoxide radicals increased by 4000~6000 CLU,which then accelerated the process of manganese oxidation in th

关 键 词：卡马西平 锰氧化 藻菌体系 超氧自由基 

分 类 号：X703[环境科学与工程—环境工程]