Opposite effects of the earthworm Eisenia fetida on the bioavailability of Zn in soils amended with ZnO and ZnS nanoparticles. (May 2020)

• Record Type: Journal Article
• Authors: Bao, Shaopan; Huang, Manqi; Tang, Wei; Wang, Tao; Xu, Jian; Fang, Tao
• Is Part Of: Environmental pollution. Volume 260(2020)
• Publication Date: 2020-05
• Subjects: Extractability -- Sulfidation -- Bioavailability -- Toxicity -- Remediation; 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.2020.114045
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: The increasing release of metallic nanoparticles (NPs) or their sulfidized forms into soils have raised concerns about their potential risks to soil ecosystems. Hence, there is a need for novel strategies to remediate metallic NPs pollution in soils. In this study, to explore the feasibility of using earthworm Eisenia fetida to manage soils contaminated with metallic NPs, we simultaneously investigated the chronic soil toxicities of ZnO NPs and ZnS NPs to E. fetida, and the effects of E. fetida on Zn extractability in soils amended with ZnO NPs and ZnS NPs. After a 28 d exposure, survival rate and weight loss of earthworms were not impacted by either ZnO NPs or ZnS NPs at a concentration of 400 mg Zn per kg soil. Further, while ZnO NPs activated earthworm antioxidative system, ZnS NPs resulted in significant alleviation of oxidative damage in earthworm. The presence of earthworms significantly decreased the bioavailability of Zn in ZnO NPs contaminated soil, whereas significantly increased the bioavailability of Zn in ZnS NPs contaminated soil. These findings implied that the earthworm E. fetida could play an important role in altering the mobilization of metals originating from metallic NPs in soils, which may further aid in the development of a method for the treatment of metallic NPs pollution in soils. Graphical abstract: Image 1 Highlights: E. fetida in soils oppositely affected the bioavailabilities of ZnO and ZnS NPs. E. fetida accumulated more Zn in ZnO NPs treated soil compared to ZnS NPs. ZnO NPs induced higher toxicity to E. fetida than ZnS NPs. The use of E. fetida in treating NPs pollution should consider the type of NPs. Abstract : The impacts of Eisenia fetida on bioavailability of metallic nanoparticles in soils varied with the type of nanoparticles.