Transformation of iopamidol and atrazine by peroxymonosulfate under catalysis of a composite iron corrosion product (Fe/Fe3O4): Electron transfer, active species and reaction pathways
文献类型：期刊论文
| 作者 | Hu, Jun; Chen, Hao; Dong, Huiyu; Zhu, Lulu; Qiang, Zhimin; Yu, Jianming |
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2021-02-05 |
| 卷号 | 403页码:- |
| 关键词 | Cast iron pipe Fe/Fe(3)O(4)catalysis Peroxymonosulfate Iopamidol Atrazine |
| ISSN号 | 0304-3894 |
| 英文摘要 | Cast iron pipes are commonly applied in drinking water distribution systems (DWDSs); peroxymonosulfate (PMS) is a promising alternative for drinking water disinfection; organic micropollutants is still present in drinking water after waterworks' treatment. However, iron corrosion products may affect the reactions between a disinfectant and organic micropollutants. The study investigated the transformation of iopamidol (IPM) and atrazine (ATZ) by PMS under the catalysis of a composite iron corrosion product (Fe/Fe3O4). The pseudo-first order rate constants (k) for the degradation of IPM and ATZ were 1.47 and 1.03 min(-1), respectively. Electron paramagnetic resonance (EPR) experiments indicated that PMS was effectively activated to yield sulfate radical (SO4 center dot-) and hydroxyl radical (HO center dot), mainly via the reduction by Fe component, dissolved Fe2+ and generated Feocta2 + . SO4 center dot- contributed more than HO center dot to the degradation of IPM and ATZ, and the radical yield achieved 0.97 mol/mol. The k values reached maximum with Fe/Fe3O4 and PMS doses of 2.5 g L-1 and 25 mg L-1, respectively. The optimum mass fraction of Fe3O4 in Fe/Fe3O4 (MFmag) and pH were 10% and 7.0, respectively. The k values increased with increasing temperature, while decreased in the presence of water matrix. Most of the iodine released from IPM was oxidized to IO3-, and NH4+ was the dominant species of nitrogen released from ATZ. The identification of transformation intermediates showed that the radical chain reactions of IPM was mainly initiated from single electron transfer and radical adduct formation, while those of ATZ was primarily initiated from hydrogen atom abstraction and radical adduct formation. |
| WOS研究方向 | Engineering, Environmental ; Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/46270]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Univ Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, 18 Shuang Qing Rd, Beijing 100085, 2.Ningbo Huayan Energy Efficiency Environm Protect, 123 Bao Shan Rd, Ningbo 315800, Peoples R China 3.Zhejiang Univ Technol, Collaborat Innovat Ctr Yangtze River Delta Reg, Coll Environm, 18 Chao Wang Rd, Hangzhou 310014, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Jun,Chen, Hao,Dong, Huiyu,et al. Transformation of iopamidol and atrazine by peroxymonosulfate under catalysis of a composite iron corrosion product (Fe/Fe3O4): Electron transfer, active species and reaction pathways[J]. JOURNAL OF HAZARDOUS MATERIALS,2021,403:-. |
| APA | Hu, Jun,Chen, Hao,Dong, Huiyu,Zhu, Lulu,Qiang, Zhimin,&Yu, Jianming.(2021).Transformation of iopamidol and atrazine by peroxymonosulfate under catalysis of a composite iron corrosion product (Fe/Fe3O4): Electron transfer, active species and reaction pathways.JOURNAL OF HAZARDOUS MATERIALS,403,-. |
| MLA | Hu, Jun,et al."Transformation of iopamidol and atrazine by peroxymonosulfate under catalysis of a composite iron corrosion product (Fe/Fe3O4): Electron transfer, active species and reaction pathways".JOURNAL OF HAZARDOUS MATERIALS 403(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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