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Water Res

Title:		Source and formation process impact the chemodiversity of rainwater dissolved organic matter along the Yangtze River Basin in summer
Author(s):		Chen S; Xie Q; Su S; Wu L; Zhong S; Zhang Z; Ma C; Qi Y; Hu W; Deng J; Ren L; Zhu D; Guo Q; Liu CQ; Jang KS; Fu P;
Address:		"Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China. School of Urban and Environmental Sciences, Key Laboratory of the Ministry of Education for Earth Surface Processes, Peking University, Beijing 100871, China. Center for Environmental Remediation, Chinese Academy of Sciences, Institute of Geographic Sciences and Natural Resources Research, Beijing 100101, China. Biomedical Omics Center, Korea Basic Science Institute, Cheongju 28119, Korea; Division of Bio-Analytical Science, University of Science and Technology, Daejeon 34113, Korea. Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China. Electronic address: fupingqing@tju.edu.cn"
Journal Title:		Water Res
Year:		2022
Volume:		20211230
Issue:
Page Number:		118024 -
DOI:		10.1016/j.watres.2021.118024
ISSN/ISBN:		1879-2448 (Electronic) 0043-1354 (Linking)
Abstract:		"Rainwater dissolved organic matter (DOM) plays an important role in the biogeochemical cycle and evolution of organic matter in the land-atmosphere interface. To better understand their sources and molecular composition in the atmosphere, rainwater samples were collected at six different locations along the Yangtze River Basin. Based on the application of a combined approach including excitation-emission matrix (EEM) fluorescence and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS), various sources (terrestrial, anthropogenic, and autochthonous sources) of rainwater DOM were revealed. Results show that the derivatives of biogenic volatile organic compounds were widely distributed and contributed to rainwater DOM along the Yangtze River Basin. In the up-river city Batang, rainwater DOM was affected by the long-range atmospheric transport due to the Indian summer monsoon. Lijiang, a city on the southeastern edge of Tibetan plateau, was related to strong local biomass burning. The industrial cities of Panzhihua and Luzhou showed large differences in organic composition due to distinct industrial types. Fuling, a district in Chongqing Municipality, was significantly contributed by aged organics from biomass burning. While rainwater DOM in Shanghai, a coastal megacity, contained a high fraction of sea spray organics. Further, more than 70% of rainwater DOM molecules are associated with 36 typical transformation mechanisms during rainwater-scavenging processes, e.g., oxidation reactions, dealkylation and decarboxylation. Our study demonstrates that local natural and anthropogenic emissions and climatic conditions strongly shaped the chemodiversity and possible precursor-product pairs of rainwater DOM along the Yangtze River Basin, which helps to better understand the biogeochemical cycles of organic matter in a large-scale watershed under the influence of human activities"
Keywords:		Aged China *Dissolved Organic Matter Fluorescence Humans *Rivers Seasons Dissolved organic matter Excitation-emission matrix fluorescence Fourier-transform ion cyclotron resonance mass spectrometry Rainwater Yangtze River Basin;
Notes:		"MedlineChen, Shuang Xie, Qiaorong Su, Sihui Wu, Libin Zhong, Shujun Zhang, Zhimin Ma, Chao Qi, Yulin Hu, Wei Deng, Junjun Ren, Lujie Zhu, Dongqiang Guo, Qingjun Liu, Cong-Qiang Jang, Kyoung-Soon Fu, Pingqing eng England 2022/01/12 Water Res. 2022 Mar 1; 211:118024. doi: 10.1016/j.watres.2021.118024. Epub 2021 Dec 30"