Photodegradation of new herbicide HW-02 in organic solvents |
| |
Authors: | Zhongbin Lu Zhiguang Hou Xiumei Wang Siwei Wang Yanyan Shang and Xing Yuan |
| |
Institution: | 1. College of Urban and Environmental Science, Northeast Normal University, Changchun 130024, China;College of Resource and Environmental Science, Jilin Agricultural University, Changchun 130118, China 2. The Center for Measurement and Test, Jilin Agricultural University, Changchun 130118, China 3. Institute of Modernization, Jilin Agricultural University, Changchun 130118, China 4. College of Resource and Environmental Science, Jilin Agricultural University, Changchun 130118, China 5. College of Urban and Environmental Science, Northeast Normal University, Changchun 130024, China |
| |
Abstract: | HW-02 is a new organophosphates herbicide which is discovered and developed in China. The kinetics and mechanism of HW-02 photodegradation in the organic solvents were studied at 25°C under the irradiation of ultraviolet light. The results showed that photochemical reaction of HW-02 in organic solvents such as n-hexane, methanol, dimethyl benzene and acetone under UV light could be well described by the first kinetic equation, and the photodegradation efficiency decreased with a order of n-hexane > methanol > xylene > acetone. The photodegradation efficiency constant of HW-02 in n-hexane, methanol, xylene and acetone were 4.951 × 10?2, 3.253 × 10?2, 2.377 × 10?2 and 1.628 × 10?2 min?1, and the corresponding half-lives were 13.99, 21.20, 29.15 and 42.56 min, respectively. By separation and identification of photoproducts using GC-MS, it could be concluded that HW-02 was photolyzed through ester cleavage, photo-dechlorination and photoisomerization of the molecule itself. |
| |
Keywords: | HW-02 organic solvent photodegradation kinetics degradation mechanism |
本文献已被 CNKI 万方数据 ScienceDirect PubMed 等数据库收录! |
| 点击此处可从《环境科学学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《环境科学学报(英文版)》下载免费的PDF全文 |
|