Photodegradation of etridiazole by UV radiation during drinking water treatment
文献类型：期刊论文
| 作者 | Chao Liu, Zhimin Qiang *, Fang Tian, Tao Zhang |
| 刊名 | Chemosphere
 |
| 出版日期 | 2009 |
| 卷号 | 76期号:1页码:609-615 |
| 关键词 | Etridiazole fungicide UV radiation Photodegradation Quantum yield Byproducts |
| 英文摘要 | The photodegradation of etridiazole (ETZ) in water by UV radiation at 254 nm was investigated. Results indicate that the simulated first-order rate constants decreased with the increase of initial ETZ concentration (i.e., 5, 20 and 30 lM), and did not show any pH dependence within the range from 6.0 to 8.0. The quantum yield was 0.46 ± 0.02 mol E 1 at pH 7.0. H2O2 was generated at trace levels in the range from 0 to 1.0 lM during photodegradation of ETZ. Direct photodegradation was responsible for the decomposition of ETZ in distilled water by UV radiation. Three organic byproducts were identified: 5-ethoxy-3-dichloromethyl-1,2,4-thiadiazole, 5-ethoxy-1,2,4-thiadiazole-3-carboxylic acid and 5-ethoxy-3-hydroxyl-1,2,4-thiadiazole. About 90% of chloro mass in the initial ETZ was released as Cl at the end of photodegradation. In contrast, the formation of sulfate and nitrate was insignificant. In general, ETZ decayed more quickly in groundwater than in sand-filtered or surface water. It is reasonably deduced that ETZ may not get removed effectively under a typical UV dose of 40 mJ cm 2 at most water treatment plants that employ UV radiation for disinfection. |
| WOS记录号 | WOS:000268197400005 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21815]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Chao Liu, Zhimin Qiang *, Fang Tian, Tao Zhang. Photodegradation of etridiazole by UV radiation during drinking water treatment[J]. Chemosphere,2009,76(1):609-615. |
| APA | Chao Liu, Zhimin Qiang *, Fang Tian, Tao Zhang.(2009).Photodegradation of etridiazole by UV radiation during drinking water treatment.Chemosphere,76(1),609-615. |
| MLA | Chao Liu, Zhimin Qiang *, Fang Tian, Tao Zhang."Photodegradation of etridiazole by UV radiation during drinking water treatment".Chemosphere 76.1(2009):609-615. |
入库方式： OAI收割
来源：生态环境研究中心
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