Ultraviolet degradation of methyltins: Elucidating the mechanism by identification of a detected new intermediary product and investigating the kinetics at various environmental conditions
文献类型：期刊论文
| 作者 | Zhai, Guangshu; Liu, Jingfu; He, Bin; Zhang, Jianbin; Zhou, Qunfang; Jiang, Guibin |
| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2008-06 |
| 卷号 | 72期号:3页码:389-399 |
| 关键词 | ultraviolet degradation methyltin reaction intermediates mechanism kinetics |
| 英文摘要 | The photodegradation of methyltins, as environmental pollutants, has scarcely been studied so far because of the shortage of rapid and sensitive speciation methods, even though they have very simple structures. The photodegradation of monomethyltin trichloride (MMT), dimethyltin dichloride (DMT) and trimethyltin chloride (TMT) was studied with our new developed HPLC-FPD hyphenated system, which enables rapid and sensitive detection of methyltins. The half-life times and kinetic rate constants of their degradation at different pH were calculated. The results suggest that MMT, DMT and TMT can be degraded under the UV irradiation rapidly at different pH, with a degradation rate sequence of TMT < DMT < MMT. Ail unknown intermediary product, which is more stable and has higher concentration at pH 8 for MMT and DMT, of methyltin photodegradation was detected for the first time. This unknown intermediary product was identified as methyloltin with electrospray mass spectrometry, and the possible mechanism was proposed based on the intermediary product. The effects of some environmental parameters such as salinity and humic acid on the degradation rate of methyltins were also investigated. Results suggest that salinity and humic acid have strong effect on their degradation, especially for TMT, which was almost never degraded in the solutions containing NaCl and humic acid. (C) 2008 Elsevier Ltd. All rights reserved. |
| WOS记录号 | WOS:000256870900005 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/22009]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhai, Guangshu,Liu, Jingfu,He, Bin,et al. Ultraviolet degradation of methyltins: Elucidating the mechanism by identification of a detected new intermediary product and investigating the kinetics at various environmental conditions[J]. CHEMOSPHERE,2008,72(3):389-399. |
| APA | Zhai, Guangshu,Liu, Jingfu,He, Bin,Zhang, Jianbin,Zhou, Qunfang,&Jiang, Guibin.(2008).Ultraviolet degradation of methyltins: Elucidating the mechanism by identification of a detected new intermediary product and investigating the kinetics at various environmental conditions.CHEMOSPHERE,72(3),389-399. |
| MLA | Zhai, Guangshu,et al."Ultraviolet degradation of methyltins: Elucidating the mechanism by identification of a detected new intermediary product and investigating the kinetics at various environmental conditions".CHEMOSPHERE 72.3(2008):389-399. |
入库方式： OAI收割
来源：生态环境研究中心
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