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25%噻嗪酮可湿性粉剂对稀有鮈鲫(Gobiocypris rarus) 的急性毒性及生物富集性
严虎,商照聪,舒耀皋
0
(上海化工研究院检测中心,上海 200062; 上海化学品公共安全工程技术研究中心,上海 200062)
摘要:
为评价杀虫剂噻嗪酮对我国特有物种稀有鮈鲫的影响,采用了静态法测定了25%噻嗪酮可湿性粉剂对稀有鮈鲫的急性毒性和生物富集性。结果表明,25%噻嗪酮可湿性粉剂对稀有鮈鲫的96 h-LC50大于有效成分浓度100 mg·L-1;选择有效成分浓度1和10 mg·L-1进行生物富集试验,连续暴露8 d的富集系数(BCF8d)分别为470.6和53.7。根据化学农药环境安全评价试验准则,噻嗪酮(25%可湿性粉剂)对稀有鮈鲫的毒性为低毒,富集等级为中等富集性。研究表明,噻嗪酮低浓度暴露的富集系数远大于高浓度暴露,并且在低浓度的水体暴露下,稀有鮈鲫体内的噻嗪酮浓度接近于高浓度的水体暴露。在使用噻嗪酮时应注意其使用范围和施用量,避免通过食物链富集对人体健康造成危害。
关键词:  噻嗪酮  稀有鮈鲫  生物富集
DOI:10.13610/j.cnki.1672-352x.20200113.010
基金项目:上海化工研究院科研计划项目(N307-2016jczx-01)资助。
Acute toxicity and bioconcentration of 25% buprofezin wettable powder (WP) on rare minnow (Gobiocypris rarus)
YAN Hu,SHANG Zhaocong,SHU Yaogao
(Testing Centre, Shanghai Research Institute of Chemical Industry, Shanghai 200062; Shanghai Engineering Research Center of Chemical Public Safety, Shanghai 200062)
Abstract:
In order to evaluate the effect of buprofezin on the endemic species of rare minnow in China, acute toxicity and bioconcentration of 25% buprofezin WP on rare minnow were measured by the static method. The results showed that: the 96 h-LC50 of 25% buprofezin WP to rare minnow was greater than the active ingredient concentration of 100 mg·L-1; the 8 days’ bioconcentration factors (BCF8d) of 25% buprofezin WP to rare minnow were 470.6 and 53.7 at the active ingredient concentration of 1 and 10 mg·L-1, respectively. According to the Environmental Safety Evaluation Test Guideline of Chemical Pesticides, 25% buprofezin WP is low toxicity and moderate enrichment to rare minnow. The results obtained in this study showed that the BCF of buprofezin at low concentration was much higher than that at high concentration. And the buprofezin concentration in rare minnow at low concentration was close to that at high concentration. The use range and dosage of buprofezin should be noticed to avoid health risks through food chain.
Key words:  buprofezin  rare minnow  bioconcentration

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