Chemodiversity of Dissolved Organic Matter in Groundwater Elucidated by the Ultrahigh-Resolution Mass Spectrometry: A Case Study of the Jianghan Plain, China

作     者：Jingjing Sun Ying Liang Qinglong Fu 

作者机构：School of Environmental Studies China University of Geosciences 

出 版 物：《Journal of Earth Science》 (地球科学学刊)

年 卷 期：2023年

核心收录：

学科分类：082803[工学-农业生物环境与能源工程] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0828[工学-农业工程] 070302[理学-分析化学] 0804[工学-仪器科学与技术] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China (No. 42107484) Natural Science Foundation of Hubei Province (No. 2022CFA029) the Fundamental Research Funds for the Central Universities,China University of Geosciences (Wuhan)(No. 122-G1323522145) 

摘      要：Dissolved organic matter (DOM) is an important reservoir of organic carbon ***,informationregardingthechemodiversityof ***,theFouriertransformioncyclotron resonancemassspectrometry(FT-ICRMS)wasusedtocharacterizethemolecularcompositionand chemodiversity of groundwater DOM from the Jianghan Plain, China. Overall, the groundwater DOM was mainly composed of CHO molecules, followed by CHON and CHOS molecules. Results of the Kendrickmassdefect(KMD)-basedhomologousanalysisrevealedthatthemajorityofCH2-homologue,H2O-homologue, and COO-homologue series generally have 2 to 8, 2 to 6, and 2 to 6 formulae for a given homologousseries, respectively. The positive correlation observed amongfunctional diversity indicessuggestingthatthechemodiversityofgroundwaterDOMislargelygovernedbytheirmolecular characteristics*** functionaldiversityofuniquemoleculesthancommonmoleculessuggestsitspotentialroleintracing the transformation of DOM in various environments. The findings of this study are expected to deepen the understanding of chemical composition and structure, degradation and transformation of groundwater DOM, and its biogeochemical cycle in groundwater and surface water.