Simultaneous degradation of sulfadiazine and dissolved organic matter based on low-impact development facilities  

作　　者：Donghai Yuan Siyu Xiong Chenling Yan Linxiao Zhai Yanqi Cui Yingying Kou 

机构地区：[1]Key Laboratory of Urban Stormwater System and Water Environment,Ministry of Education,Beijing University of Civil Engineering and Architecture,Beijing 100044,China [2]Beijing Key Laboratory of Municipal Solid Waste Detection Analysis and Evaluation,Beijing Municipal Institute of City Management,Beijing 100028,China [3]ZC Daring(Beijing)Smart City Science and Technology Development Co.Ltd.,Beijing 101100,China

出　　处：《Journal of Environmental Sciences》2023年第8期223-233,共11页环境科学学报（英文版）

基　　金：supported by the National Water Pollution Control and Management Technology Major Project(No.2018ZX07110005);the National Natural Science Foundation of China(No.52170097);the Fundamental Research Funds for Beijing University of Civil Engineering and Architecture(No.X20137);BUCEA Post Graduate Innovation Project(No.2022).

摘　　要：Sulfadiazine(SD)is a common antibiotic administered to treat bacterial infections in livestock,and its fate andmigration are greatly affected by dissolved organicmatter(DOM).The soil infiltration system[a typical low-impact development(LID)facility]can significantly alterDOMproperties during runoff pollution,thus affecting the complexation of SDwithDOM.Here,the binding characteristics of different DOM components and SD in the soil infiltration system were explored using spectroscopic techniques(excitation–emission matrices,parallel factor analysis,and synchronous fluorescence spectroscopy).Combined with the weakening of DOM fluorescence intensity and 78.63%reduction in mean SD concentration following treatment,synchronous degradation may have occurred.The binding sequence of SD and DOM fluorophores was further explored using two-dimensional correlation spectroscopy.Effluent DOM showed greater sensitivity to SD and more binding sites than influent DOM.Moreover,hydrophobic protein-like substances exhibited higher log K_(M) values than other fluorescent components,indicating that protein-like components play significant roles in SD complexation.The soil percolation system improved the complexation stability and binding sequence of fulvic-like substances.Thus,SD–DOM can be intercepted and degraded using LID facilities to reduce the risk of SD in aquatic environments.

关 键 词：Sulfadiazine(SD) Low-impact development(LID) Agricultural non-point sources Dissolved organic matter (DOM) Parallel factor analysis(PARAFAC) 

分 类 号：X52[环境科学与工程—环境工程]