期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 166, 期 -, 页码 26-34出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2018.09.052
关键词
Ecotoxicology; Microbeads; Log Kow; Insecticide; Dimethoate; Deltamethrin
资金
- UK Natural Environment Research Council through National Capability funding of the Centre for Ecology and Hydrology Pollution and Environmental Risk Program
- NERC [ceh020007, NE/N00065X/1] Funding Source: UKRI
Daphnia magna were exposed to two pesticides in the presence or absence of microplastics (300 000 particles ml(-1) 1 mu m polystyrene spheres) and to microplastics alone. The pesticides were dimethoate, an organophosphate insecticide with a low log Kow, and deltamethrin, a pyrethroid insecticide with a high log Kow. Daphnia were exposed to a nominal concentration range of 0.15, 0.31, 0.63, 1.25, 2.5, 5 mg l(-1) dimethoate and 0.016, 0.08, 0.4, 2, 5 and 10 mu g l(-1) deltamethrin. Exposure to polystyrene microplastics alone showed no effects on Daphnia magna survival and mobility over a 72 h exposure. In the dimethoate exposures, mobility and survival were both affected from a concentration of 1.25 mg l(-1), with effects were seen on mobility from 28 h and survival from 48 h, with greater effects seen with increasing concentration and exposure time. In deltamethrin exposures, survival was affected from a concentration of 0.4 mu g l(-1) and mobility from a concentration of 0.08 mu g l(-1). Effects of deltamethrin on mobility were seen from 5 h and on survival from 28 h, with greater effects on survival and mobility seen with increasing concentration and exposure time. Contrary to expectations, pesticide toxicity to Daphnia magna was not affected by the presence of microplastics, regardless of chemical binding affinity (log Kow). This therefore suggests that polystyrene microplastics are unlikely to act as a significant sink, nor as a vector for increased uptake of pesticides by aquatic organisms. Capsule: Polystyrene microplastics are unlikely to act as vector for increased uptake of pesticides by aquatic organisms
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据