Regional difference in the microheterogeneous distribution of singlet oxygen photoproduction from soil-derived dissolved organic matter: unraveling functional group and molecular-level drivers
文献类型：期刊论文
| 作者 | Zheng, Xiaoyan4; Jiang, Yayin4; Sun, Qiyuan3,4; Wang, Feifeng3,4; Guo, Guanghui2; Lu, Jinfeng1; Luo, Yuting4; Huang, Pengcheng4 |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2026-05-15 |
| 卷号 | 296页码:125627 |
| 关键词 | Soil-derived dissolved organic matter Singlet oxygen Microheterogeneous distribution Photochemistry Molecular Components |
| ISSN号 | 0043-1354 |
| DOI | 10.1016/j.watres.2026.125627 |
| 产权排序 | 3 |
| 文献子类 | Article |
| 英文摘要 | Soil-derived dissolved organic matter (SDOM) is a critical terrestrial input that governs the photochemical reactivity of aquatic ecosystems. Its molecular composition exhibits significant variations along a latitudinal gradient, which in turn affects the microheterogeneous distribution and efficiency of photochemically produced reactive intermediates. This study deciphers spatial disparities and molecular mechanisms underlying the microheterogeneous photoproduction of singlet oxygen (O-1(2)) by SDOM across different regions. The results demonstrated that the microheterogeneous distribution of O-1(2) was more pronounced in high-latitude SDOM and gradually weakened toward lower latitudes. This spatial disparity was primarily governed by the SDOM's aromaticity and the abundance of nitrogen-containing functional groups, which correlated positively with O-1(2) heterogeneity, while correlated negatively with its sulfur-containing functional groups. Further analysis revealed that the aromaticity and nitrogen content of SDOM decreased from high to low latitudes. Conversely, sulfur content displayed a distinct increasing trend. Furthermore, the microheterogeneous distribution of O-1(2) generation in high-latitude SDOM was predominantly governed by high molecular weight fractions (<100 kDa), while in low-latitude SDOM, low molecular weight fractions (<10 kDa) served as the primary contributors. These findings provide a theoretical support for in-depth research on the latitude-dependent photochemical activity of SDOM within the study area, with significant implications for spatial variations in the degradation of aquatic pollutants. |
| URL标识 | 查看原文 |
| WOS关键词 | SOLID-PHASE EXTRACTION ; WATER ; DOM ; PHOTOCHEMISTRY ; FRACTIONS ; CHEMISTRY ; KINETICS ; IMPACT |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001707122100001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/221177]  |
| 专题 | 资源利用与环境修复重点实验室_外文论文 |
| 通讯作者 | Sun, Qiyuan; Wang, Feifeng |
| 作者单位 | 1.Nankai Univ, Coll Environm Sci & Engn, Tianjin 300050, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; 3.Fujian Coll & Univ Engn Res Ctr Municipal Waste Re, Fuzhou 350117, Fujian, Peoples R China; 4.Fujian Normal Univ, Coll Environm & Resource Sci, Fujian Key Lab Pollut Control & Resource Reuse, Fuzhou 350117, Fujian, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zheng, Xiaoyan,Jiang, Yayin,Sun, Qiyuan,et al. Regional difference in the microheterogeneous distribution of singlet oxygen photoproduction from soil-derived dissolved organic matter: unraveling functional group and molecular-level drivers[J]. WATER RESEARCH,2026,296:125627. |
| APA | Zheng, Xiaoyan.,Jiang, Yayin.,Sun, Qiyuan.,Wang, Feifeng.,Guo, Guanghui.,...&Huang, Pengcheng.(2026).Regional difference in the microheterogeneous distribution of singlet oxygen photoproduction from soil-derived dissolved organic matter: unraveling functional group and molecular-level drivers.WATER RESEARCH,296,125627. |
| MLA | Zheng, Xiaoyan,et al."Regional difference in the microheterogeneous distribution of singlet oxygen photoproduction from soil-derived dissolved organic matter: unraveling functional group and molecular-level drivers".WATER RESEARCH 296(2026):125627. |
入库方式： OAI收割
来源：地理科学与资源研究所
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