Linking the source, molecular composition, and reactivity of dissolved organic matter in major rivers across the pearl river delta
文献类型：期刊论文
| 作者 | Huang, Lu1,2; Wang, Wencai2; Wei, Gangjian1; Li, Shida1,2; Yang, Mengdi1,2; Wu, Yao3; Luo, Qianli2; Huang, Zhiwei2; Fang, Huaiyang2; Fan, Zhongya2 |
| 刊名 | JOURNAL OF CLEANER PRODUCTION
 |
| 出版日期 | 2023-09-25 |
| 卷号 | 420页码:10 |
| 关键词 | Dissolved organic matter Molecular composition Fourier transform ion cyclotron resonance mass spectrometry Degradation kinetics Anthropogenic perturbation |
| ISSN号 | 0959-6526 |
| DOI | 10.1016/j.jclepro.2023.138460 |
| 英文摘要 | Dissolved organic matter (DOM) constitutes a substantial portion of the global carbon cycle and serves as the largest reservoir of reactive carbon on Earth. Studying DOM's sources, molecular compositions, and reactivity is central to understanding the fate and environmental effects of organic carbon, yet, links between DOM composition and reactivity remain to be established. In this study, stable carbon isotopic composition and ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) were combined with degradation experiments to comprehensively study DOM's properties in the major rivers across the Pearl River Delta (PRD) in South China. The increasing delta 13C-DOC along the Pearl River at the PRD suggests that terrestrial DOM from upstream was gradually diluted by local processes. Although affected by different inter -action patterns of multiple sources, a major component of DOM, enriched in CHO and lignins, is molecularly indistinguishable in different rivers (molecular Bray-Curtis dissimilarity of 15%-31%). The photo-degradation removed 34% (PDOC%) of initial DOM within 14 days, twice that by biodegradation (BDOC%). In contrast to earlier research, the distinctive integration of molecular characterization with DOM degradation kinetics in-dicates that both regional (common shared molecules) and local (partial shared and unique molecules) derived DOM play a collective role in governing the bio-degradation kinetics of DOM, while the photo-degradation ki-netics of DOM are barely correlated to molecular composition. The thorough investigation of DOM molecular composition and its correlation with bulk DOM properties in the PRD region, though requiring further investi-gation into its mechanisms, offers valuable insights into the role of riverine DOM in coastal hypoxia and the global carbon cycle. |
| WOS研究方向 | Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001147843400001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/76107]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Fan, Zhongya; Zeng, Fantang |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Isotope Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 2.Minist Ecol & Environm, South China Inst Environm Sci, Key Lab Water & Air Pollut Control Guangdong Prov, Guangzhou 510530, Peoples R China 3.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Changchun 130102, Jilin, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Lu,Wang, Wencai,Wei, Gangjian,et al. Linking the source, molecular composition, and reactivity of dissolved organic matter in major rivers across the pearl river delta[J]. JOURNAL OF CLEANER PRODUCTION,2023,420:10. |
| APA | Huang, Lu.,Wang, Wencai.,Wei, Gangjian.,Li, Shida.,Yang, Mengdi.,...&Zeng, Fantang.(2023).Linking the source, molecular composition, and reactivity of dissolved organic matter in major rivers across the pearl river delta.JOURNAL OF CLEANER PRODUCTION,420,10. |
| MLA | Huang, Lu,et al."Linking the source, molecular composition, and reactivity of dissolved organic matter in major rivers across the pearl river delta".JOURNAL OF CLEANER PRODUCTION 420(2023):10. |
入库方式： OAI收割
来源：广州地球化学研究所
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