Dual role of soil-derived dissolved organic matter in the sulfamethoxazole oxidation by manganese dioxide
文献类型：期刊论文
| 作者 | Yang, Biwei1,2; Du, Penghui1; Chen, Guoping1; Zhang, Peng1; Zhang, Qiang1; Wang, Zhongying1; Zhang, Gan3,4; Cai, Zongwei2; Wang, Junjian1 |
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2023-05-15 |
| 卷号 | 235页码:8 |
| 关键词 | Manganese dioxide Soil-derived dissolved organic matter Sulfamethoxazole Oxidation Fourier transform ion cyclotron resonance mass spectrometry |
| ISSN号 | 0043-1354 |
| DOI | 10.1016/j.watres.2023.119901 |
| 英文摘要 | Manganese dioxide (MnO2) can mediate organic pollutant oxidation in aquatic environments, which has been reported to be inhibited or promoted by dissolved organic matter (DOM) in different studies. It remains unre-solved why conflicting results have been observed and whether such results depend on the type and concen-tration of DOM. Here, we used three types of well-characterized DOM derived from soil heated at 50, 250, or 400 degrees C (DOM_50, DOM_250, and DOM_400, respectively) to evaluate the impacts of DOM type and concentration and environmental pH on MnO2-mediated oxidation of sulfamethoxazole, a widely detected and ecotoxic emerging pollutant. We observed that the degradation rate of sulfamethoxazole was possibly promoted by DOM_250 (pH 6-8), while it was generally inhibited by DOM_50 and DOM_400. Furthermore, it was initially inhibited and then promoted with increasing DOM concentrations and was consistently less inhibited at a higher pH. The inter-DOM variations of sulfamethoxazole degradation could be explained by the more enriched poly-phenolics in DOM_250 than in DOM_50 and DOM_400, whereas the weak promoting effect of DOM_400 indicates that high DOM aromaticity may not necessarily promote pollutant degradation. Our results reconcile the debate on the role of DOM in the oxidation of sulfamethoxazole by MnO2 and highlight the decisiveness of the molecular composition and concentration of DOM and the reaction pH in the overall promoting or inhibiting role of DOM. |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001027077100001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/74441]  |
| 专题 | 有机地球化学国家重点实验室 |
| 通讯作者 | Wang, Junjian |
| 作者单位 | 1.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen, Peoples R China 2.Hong Kong Baptist Univ, Dept Chem, State Key Lab Environm & Biol Anal, Hong Kong, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangdong Prov Key Lab Environm Protect & Resource, Guangzhou, Peoples R China 4.Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Hong Kong Macao Joint Lab Environm Pollu, Guangzhou, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Biwei,Du, Penghui,Chen, Guoping,et al. Dual role of soil-derived dissolved organic matter in the sulfamethoxazole oxidation by manganese dioxide[J]. WATER RESEARCH,2023,235:8. |
| APA | Yang, Biwei.,Du, Penghui.,Chen, Guoping.,Zhang, Peng.,Zhang, Qiang.,...&Wang, Junjian.(2023).Dual role of soil-derived dissolved organic matter in the sulfamethoxazole oxidation by manganese dioxide.WATER RESEARCH,235,8. |
| MLA | Yang, Biwei,et al."Dual role of soil-derived dissolved organic matter in the sulfamethoxazole oxidation by manganese dioxide".WATER RESEARCH 235(2023):8. |
入库方式： OAI收割
来源：广州地球化学研究所
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