毒死蜱工业级及其乳油浓缩剂(20%EC)对淡水鲤鱼和淡水鲶鱼的急性毒性比较研究。

IF 2.7 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Rajib Majumder
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引用次数: 0

摘要

毒死蜱作为一种有机磷杀虫剂在全球广泛使用,并经常通过农田径流污染淡水水体。在实验室中进行了静态生物测定,以检验两种淡水鱼(Labeo rohita 和 Mystus vittatus)接触毒死蜱工业级(94% 有效成分)和乳油(20% EC)后所产生的急性毒性差异。在水中浸泡两小时后,毒死蜱实际浓度的回收率从 83%(工业级,T)到 89%(乳油,F)不等。两种鱼类对两种毒死蜱的敏感性各不相同。T 型和 F 型毒死蜱对 L. rohita 的 96 小时半数致死浓度值分别为 68 微克/升和 36 微克/升,对 M. vittatus 的 96 小时半数致死浓度值分别为 120 微克/升和 62 微克/升。随着接触时间的延长,半数致死浓度值逐渐降低。根据 Mayer 等人(1986 年)、Schmuck 等人(1994 年)、APHA(1995 年)和 Demetrio 等人(2014 年)的标准,比较了工业级和制剂的半致死浓度值。研究得出结论,毒死蜱乳油(20% EC)的毒性高于工业级毒死蜱。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Comparative Acute Toxicity Studies of Chlorpyrifos Technical Grade with its Emulsifiable Concentrate (20% EC) on Labeo rohita, a Freshwater Major Carp, and Mystus vittatus, a Freshwater Catfish.

Comparative Acute Toxicity Studies of Chlorpyrifos Technical Grade with its Emulsifiable Concentrate (20% EC) on Labeo rohita, a Freshwater Major Carp, and Mystus vittatus, a Freshwater Catfish.

Chlorpyrifos is widely used across the world as an organophosphate insecticide and frequently contaminates freshwater bodies through runoff from agricultural fields. In the laboratory, static bioassays were undertaken to examine differences in acute toxicity caused by exposure to the technical grade (94% a.i.) and an emulsifiable concentrate (20% EC) of chlorpyrifos to two species of freshwater fish, Labeo rohita and Mystus vittatus. The recovery of actual chlorpyrifos concentrations varied from 83% (technical grade, T) to 89% (emulsifiable concentrate, F) after two hours in water. The susceptibilities of the two fish species to the two types of chlorpyrifos varied. The 96-h LC50 values for T and F chlorpyrifos in L. rohita were 68 and 36 µg/L, respectively, and 120 and 62 µg/L in M. vittatus, respectively. As the exposure period was extended, the LC50 values gradually decreased. LC50 values between the technical grade and formulation were compared following the criteria of Mayer et al. (1986), Schmuck et al. (1994), APHA (1995), and Demetrio et al. (2014). It was concluded from the study that the emulsifiable concentrate (20% EC) of chlorpyrifos was more toxic than technical-grade chlorpyrifos.

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来源期刊
CiteScore
5.60
自引率
3.70%
发文量
230
审稿时长
1.7 months
期刊介绍: The Bulletin of Environmental Contamination and Toxicology(BECT) is a peer-reviewed journal that offers rapid review and publication. Accepted submissions will be presented as clear, concise reports of current research for a readership concerned with environmental contamination and toxicology. Scientific quality and clarity are paramount.
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