Synergistic effects between hydroxyl radicals and hydrated electrons on strengthening decomposition of an s-triazine compound: A combined experimental and theoretical study | |
Tang, L; Lyu, GX; Mao, W; Xue, YC; Li, L; Jia, CT; Wu, MH | |
刊名 | CHEMOSPHERE |
2018 | |
卷号 | 195页码:365-371 |
关键词 | Aqueous-solution Cyanuric Acid Herbicides Degradation Water Atrazine Pesticides Groundwater Mineralization Environment |
ISSN号 | 0045-6535 |
DOI | 10.1016/j.chemosphere.2017.12.097 |
文献子类 | 期刊论文 |
英文摘要 | The decomposition of an environmentally recalcitrant s-triazine compound, prometry (PMT), was carried out by experimental and theoretical approaches to study the combined effects of hydroxyl radicals (center dot OH) and hydrated electrons (e(aq)(-)). With the participation of strongly oxidative radicals (OH)-O-center dot and reductive radicals e(aq)(-) induced by electron beam (EB), PMT obtained a good decomposition performance, which was obviously better than those methods simply using (OH)-O-center dot as the single active species. The evolution of cyanuric acid (CA) during the EB and UV irradiation processes elucidate that former method could efficiently decompose such chemically stable intermediate. The experiments of radical scavengers further suggest that (OH)-O-center dot was the predominant radical during PMT degradation, while e(aq)(-) was beneficial to further decomposition and mineralization. Combined with the results of density functional theory (DFT) calculations, the strengthened synergistic effects between (OH)-O-center dot and e(aq)(-) were proven. The calculations illustrated (OH)-O-center dot could attack the carbon-branch-chains of s-trazine ring and form OH-adducts rather than nitrogen oxides. Moreover, the presence of e(aq)(-) could not only greatly change the geometry of the s-triazine ring, but also help cleaving alkyl chain on ring, thus facilitate the complete mineralization. (C) 2017 Elsevier Ltd. All rights reserved. |
语种 | 英语 |
WOS记录号 | WOS:000424172400037 |
内容类型 | 期刊论文 |
源URL | [http://ir.sinap.ac.cn/handle/331007/29160] |
专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
作者单位 | 1.Tang, L 2.Lyu, GX 3.Mao, W 4.Xue, YC 5.Li, L 6.Jia, CT 7.Wu, MH |
推荐引用方式 GB/T 7714 | Tang, L,Lyu, GX,Mao, W,et al. Synergistic effects between hydroxyl radicals and hydrated electrons on strengthening decomposition of an s-triazine compound: A combined experimental and theoretical study[J]. CHEMOSPHERE,2018,195:365-371. |
APA | Tang, L.,Lyu, GX.,Mao, W.,Xue, YC.,Li, L.,...&Wu, MH.(2018).Synergistic effects between hydroxyl radicals and hydrated electrons on strengthening decomposition of an s-triazine compound: A combined experimental and theoretical study.CHEMOSPHERE,195,365-371. |
MLA | Tang, L,et al."Synergistic effects between hydroxyl radicals and hydrated electrons on strengthening decomposition of an s-triazine compound: A combined experimental and theoretical study".CHEMOSPHERE 195(2018):365-371. |
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