Photochemical behavior of dissolved organic matter in environmental surface waters:A review  

作　　者：Yichen Xu Yutong Zhang Longlong Qiu Ming Zhang Jiaojiao Yang Rong Ji Davide Vione Zhanghao Chen Cheng Gu 

机构地区：[1]State Key Laboratory of Pollution Control and Resource Reuse,School of Environment Nanjing University,Nanjing 2023,China [2]Department of Environmental Engineering,College of Biology and the Environment,Nanjing Foresty University,Nanjing 210037,China [3]Quanzhou Institute for Environmental Protection Industry,Nanjing University,Quanzhou 362000,China [4]Department of Chemisty,University of Turin,Via Pietro Giuria 5,10125,Torino,Ital

出　　处：《Eco-Environment & Health》2024年第4期529-542,共14页生态环境与健康(英文)

基　　金：supported by the Youth Talent Support Program of Fujian Province (2023J05089);National Natural Science Foundation of China (22206078,22176092);Outstanding Postdoctoral Program of Jiangsu Province,and the Fundamental Research Funds for the Central Universities (021114380204);support from the Project CH4.0 under the MUR program"Dipartimenti di Eccellenza 2023-2027" (CUP:D13C22003520001);Next Generation EU-PNRR project GRINS (Growing Resilient,INclusive,and Sustainable),PE9-spoke 6.

摘　　要：As an important group of widespread organic substances in aquatic ecosystems,dissolved organic matter(DOM)plays an essential role in carbon recycling and transformation processes.The photochemical behavior of DOM is one of the main ways it participates in these processes,and it attracts extensive attention.However,due to a variety of sources and water conditions,including both freshwater and seawater environments,the photochemical properties of DOM exhibit great differences.Nowadays,a large number of studies have focused on the generation process of reactive species(RS)from sunlit DOM,while lttle effort has been made so far to provide a comprehensive summary of the photochemical behavior of DOM,especially in fresh and saline aquatic ecosystems.In this review,we analyzed the research hotspot on DOM photochemistry over the last 30 years,summarizing the generation of photoreactive species in natural water environments containing DOM(both freshwater and seawater)and listing the main factors affecting the rate,yield,and species of RS photoproduction.Compared with freshwater,seawater has unique characteristics such as high pH value,high ionic strength,and halide ions,which affect the photogeneration of Rs,the photoconversion process,as well as the reaction pathways of various environmental substances.In general,DOM-induced surface water photochemistry has important impacts on the environmental transformation and toxic effects of aquatic pollutants and can even contribute significantly to the Earth's carbon cycle,which would have potential implications for both human and ecological health.

关 键 词：Dissolved organic matter PHOTOCHEMISTRY Reactive species Surface waters Ecological impact 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]