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Enhanced chemodiversity, distinctive molecular signature and diurnal dynamics of dissolved organic matter in streams of two headwater catchments, Southeastern China

文献类型：期刊论文

作者Gong, Chen3,4; Jiao, Ruyuan1,2; Yan, Weijin4; Yu, Qibiao4; Li, Qingqian4; Zhang, Peipei4; Li, Yanqiang4; Wang, Dongsheng1,2
刊名WATER RESEARCH
出版日期2022-03-01
卷号211页码:12
关键词Dissolved organic matter FT-ICR MS Molecular composition Headwater stream Disinfection byproducts
ISSN号0043-1354
DOI10.1016/j.watres.2022.118052
英文摘要Dissolved organic matter (DOM) is a complicated assembly of organic molecules, including thousands of molecules with various structures and properties. However, how the stream DOM sources respond to carbon compositions and the transformation processes remains unclear. In this study, the chemical characteristics and spectral and mass spectrometry (FT-ICR MS) of DOM were analyzed. Six sampling points of headwater stream (HWSs) were sampled, and an effluent polluted stream (WSR) and a main stream of the Changjiang River (DT) were also sampled for comparison. In situ degradation experiments and FT-ICR MS analysis were also performed to observe the dynamic processes of DOM in HWS. The results showed that the anthropogenic markers of sewage (i.e. sulfur (S) compounds and marker from antibiotics and estrogen) in HWS were higher than those in DT. The molecular weight decreased while the degradation products (S-containing compounds and unsaturated compounds (HU)) increased after in situ degradation due to the influence of both the photodegradation and biodegradation process. In addition, the KMD plots showed that the DOM homologue intensities in range 400-600 Da changed significantly after demethylation by biodegradation. The components of highly refractory substances and the degradation degree of DOM in DT was higher than that in HWS. We extracted the refractory DOM pool in HWS, which was mainly small molecular with molecular weights < 600 Da. These molecular will be difficult to remove in traditional drinking water treatment processes and easily produced disinfection byproducts (DBPs). This study emphasized the necessity of identifying the sources and transformation processes of DOM in HWS and clarified the types and characteristics of DOM that should be considered in future drinking water treatment.
WOS关键词RESOLUTION MASS-SPECTROMETRY ; ULTRA-HIGH-RESOLUTION ; FLUORESCENCE SPECTROSCOPY ; RIVER ; DEGRADATION ; TRANSFORMATION ; PERSISTENCE ; PERFORMANCE ; CONTINUUM ; INSIGHTS
资助项目National Natural Science Foundation of China[42077304] ; National Natural Science Foundation of China[41877483] ; National Natural Science Foundation of China[41371454]
WOS研究方向Engineering ; Environmental Sciences & Ecology ; Water Resources
语种英语
WOS记录号WOS:000758734100004
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/171614]  
专题陆地表层格局与模拟院重点实验室_外文论文
作者单位1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Yangtze River Delta Branch, Yiwu City 322000, Zhejiang, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Gong, Chen,Jiao, Ruyuan,Yan, Weijin,et al. Enhanced chemodiversity, distinctive molecular signature and diurnal dynamics of dissolved organic matter in streams of two headwater catchments, Southeastern China[J]. WATER RESEARCH,2022,211:12.
APA Gong, Chen.,Jiao, Ruyuan.,Yan, Weijin.,Yu, Qibiao.,Li, Qingqian.,...&Wang, Dongsheng.(2022).Enhanced chemodiversity, distinctive molecular signature and diurnal dynamics of dissolved organic matter in streams of two headwater catchments, Southeastern China.WATER RESEARCH,211,12.
MLA Gong, Chen,et al."Enhanced chemodiversity, distinctive molecular signature and diurnal dynamics of dissolved organic matter in streams of two headwater catchments, Southeastern China".WATER RESEARCH 211(2022):12.

入库方式： OAI收割

来源：地理科学与资源研究所

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