Metal oxide nanoparticles facilitate the accumulation of bifenthrin in earthworms by causing damage to body cavity. (August 2020)

• Record Type: Journal Article
• Authors: Li, Ming; Xu, Guanghui; Yang, Xiutao; Zeng, Ying; Yu, Yong
• Is Part Of: Environmental pollution. Volume 263(2020)Supplement Part A
• Publication Date: 2020-08
• Subjects: Bifenthrin -- Nano CuO -- Nano ZnO -- Accumulation -- Earthworms; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2020.114629
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: In this study, we explored the influence of two metal oxide nanoparticles, nano CuO and nano ZnO (10, 50, 250 mg/kg), on accumulation of bifenthrin (100 μg/kg) in earthworms ( Eisenia fetida ) and its mechanism. The concentrations of bifenthrin in earthworms from binary exposure groups (bifenthrin + CuO and bifenthrin + ZnO) reached up to 23.2 and 28.9 μg/g, which were 2.65 and 3.32 times of that in bifenthrin exposure group without nanoparticles, respectively, indicating that nanoparticles facilitated the uptake of bifenthrin in earthworms. The contents of biomarkers (ROS, SOD, and MDA) in earthworms indicated that nanoparticles and bifenthrin caused damage to earthworms. Ex vivo test was utilized to investigate the toxic effects of the pollutants to cell membrane of earthworm coelomocytes and mechanism of increased bifenthrin accumulation. In ex vivo test, cell viability in binary exposure groups declined up to 30% and 21% compared to the control group after 24 h incubation, suggesting that coelomocyte membrane was injured by the pollutants. We conclude that nanoparticles damage the body cavity of earthworms, and thus lead to more accumulation of bifenthrin in earthworms. Our findings provide insights into the interactive accumulation and toxicity of nanoparticles and pesticides to soil organisms. Graphical abstract: Image 1 Highlights: Nanoparticles enhanced the bifenthrin accumulation in the earthworms. Damaged body cavity caused by nanoparticles increases the accumulation of bifenthrin. Higher toxicity caused by nano CuO results in larger Sorbefacient Coefficient value. Nano CuO leads to severer damage to individual earthworms compared to nano ZnO.