研究论文
王一茹,Crosby D G.新型除草剂快杀稗在水田环境中归宿的研究[J].环境科学学报,1992,12(3):261-267
新型除草剂快杀稗在水田环境中归宿的研究
- ENVIRONMENTAL FATE OF QUINCLORAC IN RICE FIELDS
- 基金项目：
- 作者
- 单位
- 王一茹
- 农业部环境保护研究所, 天津 300191
- Crosby D G
- 美国加州大学Davis分校环境毒理系, 美国加州大学Davis分校环境毒理系访问学者
- 摘要：快杀稗为新型选择性水田除草剂,正在世界各地实验推广.快杀稗在太阳光下,纯水中稳定,田水中光解较快.在模拟太阳光的紫外光下（即光解反应器内）,在灭菌的田水中光解较慢,H2O2可大大加快光解速率,主要光解产物为3,7-二氯喹啉.在pH8的水中稳定,不易为微生物降解,几乎不与水田底泥结合,且不易挥发.在田间,快杀稗在30天内消解93—99％,其中第一天消解约50％.稻田底泥中快杀稗含量很低.可以推测,快杀稗污染环境的潜在危险性较小.
- Abstract：Quinclorac was found to be stable in distilled water and broken down faster in rice field water toward sunlight. Under simulated sunlight(in photorea-ctor), it was slowly degraded in sterile field water and the photolysis rate was greatly increased by addition of hydrogen peroxide. The principal photoproduct identified is 3, 7-dichloroquinoline. Quinclorac was stable in water at pH 8 toward microorganisms, not appreciably bound to field sediment, and virtually nonvolatile. In rice field, quinclorac levels in water declined 93-99% within 30 days, about half of the loss occurring during the first day.
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