EXPERIMENTAL AND THEORETICAL INSIGHTS INTO PHOTOCHEMICAL TRANSFORMATION KINETICS AND MECHANISMS OF AQUEOUS PROPYLPARABEN AND RISK ASSESSMENT OF ITS DEGRADATION PRODUCTS
文献类型：期刊论文
| 作者 | An, TC ; Fang, HS ; Li, GY ; Wang, SL ; Yao, SD |
| 刊名 | ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
 |
| 出版日期 | 2014 |
| 卷号 | 33期号:8页码:1809—1816 |
| 关键词 | POLYCYCLIC AROMATIC-HYDROCARBONS PHOTOCATALYTIC DEGRADATION EXCITED-STATES PARABENS PHOTODEGRADATION PHOTOLYSIS OXIDATION PHENOLS TIO2 IRRADIATION |
| ISSN号 | 0730-7268 |
| 通讯作者 | antc99@gig.ac.cn |
| 英文摘要 | The kinetics and mechanisms of ultraviolet photochemical transformation of propylparaben (PPB) were studied. Specific kinetics scavenging experiments coupled with quantum yield determinations were used to distinguish the roles of various reactive species induced by self-sensitized and direct photolysis reactions, and the excited triplet state of PPB ((PPB)-P-3*) was identified as the most important species to initiate the photochemical degradation of PPB in aquatic environments. The computational results of time-resolved absorption spectra proved that (PPB)-P-3* is a highly reactive electron acceptor, and a head-to-tail hydrogen transfer mechanism probably occurs through electron coupled with proton transfer. Physical quenching by, or chemical reaction of (PPB)-P-3* with, O-2 was confirmed as a key step affecting the initial PPB transformation pathways and degradation mechanisms. The transformation products were identified and the toxicity evolutions of PPB solutions during photochemical degradation under aerobic and anaerobic conditions were compared. The results indicate that anaerobic conditions are more likely than aerobic conditions to lead to the elimination and detoxification of PPB but less likely to lead to PPB mineralization. (C) 2014 SETAC |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000340536900019 |
| 公开日期 | 2015-03-13 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/14131]  |
| 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 |
| 推荐引用方式 GB/T 7714 | An, TC,Fang, HS,Li, GY,et al. EXPERIMENTAL AND THEORETICAL INSIGHTS INTO PHOTOCHEMICAL TRANSFORMATION KINETICS AND MECHANISMS OF AQUEOUS PROPYLPARABEN AND RISK ASSESSMENT OF ITS DEGRADATION PRODUCTS[J]. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY,2014,33(8):1809—1816. |
| APA | An, TC,Fang, HS,Li, GY,Wang, SL,&Yao, SD.(2014).EXPERIMENTAL AND THEORETICAL INSIGHTS INTO PHOTOCHEMICAL TRANSFORMATION KINETICS AND MECHANISMS OF AQUEOUS PROPYLPARABEN AND RISK ASSESSMENT OF ITS DEGRADATION PRODUCTS.ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY,33(8),1809—1816. |
| MLA | An, TC,et al."EXPERIMENTAL AND THEORETICAL INSIGHTS INTO PHOTOCHEMICAL TRANSFORMATION KINETICS AND MECHANISMS OF AQUEOUS PROPYLPARABEN AND RISK ASSESSMENT OF ITS DEGRADATION PRODUCTS".ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 33.8(2014):1809—1816. |
入库方式： OAI收割
来源：上海应用物理研究所
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