The tendency of linuron in microcosmic system and its response to hydrodynamic conditions

4th International Conference on Water Resource and Environment

地球科学;生态环境科学

Liu, J.C.^1 ; Sun, Y.^1 ; Hou, K.K.^1 ; Lu, G.H.^1,2 ; Chen, W.^1

Key Laboratory for Integrated Regulation and Resources Development on Shallow Lakes, College of Environment, Hohai University, Nanjing

210098, China^1

College of Hydraulic and Civil Engineering, Xizang Agricultural and Animal Husbandry College, Linzhi

860000, China^2

关键词: Bioaccumulation potential;    Environmental fate;    Environmental media;    Hydrodynamic conditions;    Initial concentration;    Laboratory microcosm;    Reduction rate;    Toxicological effects;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/191/1/012051/pdf
DOI  :  10.1088/1755-1315/191/1/012051

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The environmental fate and bioaccumulation of linuron in a laboratory microcosm were investigated at three flow velocity over a period of 10 days. Linuron concentrations were quantified in the environmental media water, sediment, algae and fish after 1, 2, 4, 7 and 10 days of exposure. The results showed that rapid decrease in water phase of the microcosm was occurred, linuron had decreased to 56.7%-67.9% of the initial concentrations on day 10, and reduction rates showed an obvious increase with increased flow velocity. The linuron concentrations in the sediment were 1.25-2.13 ng/g on day 10, which were much less than that in algae (387-477 ng/g). The linuron was widely detected in fish tissues, and the bioaccumulation concentrations were generally in the following order: liver > kidney > brain > skin > muscle > gill at an early stage of exposure. However, the ability of liver detoxification increased with the exposure time and exposure flow velocity, so that the bioaccumulation potential was highest in kidney at the end stage of exposure. This result indicates that a significant uptake potential of linuron in organisms, further studies are necessary to elucidate food chain bioaccumulation and toxicological effects of linuron.