Knowledge Management System Of Guangzhou Institute of Geochemistry，CAS
Yang, Biwei1,2; Du, Penghui2; Chen, Guoping2; Zhang, Peng2; Zhang, Qiang2; Wang, Zhongying2; Zhang, Gan3,4 ; Cai, Zongwei1; Wang, Junjian2
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| Dual role of soil-derived dissolved organic matter in the sulfamethoxazole oxidation by manganese dioxide | |
| Source Publication | WATER RESEARCH
 |
| ISSN | 0043-1354 |
| 2023-05-15 | |
| Volume | 235Pages:8 |
| DOI | 10.1016/j.watres.2023.119901 |
| Language | 英语 |
| WOS Research Area | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| Abstract | 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. |
| Keyword | Manganese dioxide Soil-derived dissolved organic matter Sulfamethoxazole Oxidation Fourier transform ion cyclotron resonance mass spectrometry |
| WOS ID | WOS:001027077100001 |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.gig.ac.cn/handle/344008/74442 |
| Collection | 有机地球化学国家重点实验室 |
| Corresponding Author | Wang, Junjian |
| Affiliation | 1.Hong Kong Baptist Univ, Dept Chem, State Key Lab Environm & Biol Anal, Hong Kong, Peoples R China 2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen, 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 |
| Recommended Citation 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. |
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