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
2018
发表期刊CHEMOSPHERE
ISSN0045-6535
卷号195页码:365-371
文章类型期刊论文
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.
关键词Aqueous-solution Cyanuric Acid Herbicides Degradation Water Atrazine Pesticides Groundwater Mineralization Environment
DOI10.1016/j.chemosphere.2017.12.097
收录类别SCI
语种英语
WOS记录号WOS:000424172400037
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/29160
专题中科院上海应用物理研究所2011-2018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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