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Comparative chronic toxicity of nanoparticulate and ionic zinc to the earthworm Eisenia veneta in a soil matrix.
Environ Int. 2011 Aug; 37(6):1111-7.EI

Abstract

Manufactured nanoparticles (NPs) are increasingly being used in a range of consumer products and are already entering the environment. NP ZnO is one of the most widely used and potentially toxic NPs in aquatic exposures. It is likely that ZnO nanoparticles will also be bioavailable to soil organisms, studies on ZnO NP toxicity in a soil matrix are lacking. We exposed the earthworm Eisenia veneta to uncoated NP ZnO (<100 nm) dosed to soil and food at 250 and 750 mg Zn kg(-1) for 21 d. Concurrent exposures of equivalent ionic Zn were conducted with ZnCl(2) and for both forms effects on life history traits, immune activity and Zn body concentrations were compared. Despite slightly higher measured body concentrations, NP ZnO generally had less impact than ZnCl(2) on measured traits. At 750 mg Zn kg(-1), reproduction declined by 50% when exposed to NP ZnO but was almost completely inhibited by ZnCl(2). Similarly, immune activity was unaffected by NP ZnO but was suppressed by 20% when exposed to ZnCl(2). Scanning electron microscopy analysis of worm tissues following 24h aqueous exposure showed the presence of ZnO particles suggesting that NPs can be taken up in particulate form. This may explain the reduced effects at similar body concentrations seen in the soil study. Our findings suggest that risk assessments do not need to go beyond considering the metal component of NP ZnO in soils at least for the larger size uncoated particles considered here.

Authors+Show Affiliations

Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire, UK.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21440301

Citation

Hooper, Helen L., et al. "Comparative Chronic Toxicity of Nanoparticulate and Ionic Zinc to the Earthworm Eisenia Veneta in a Soil Matrix." Environment International, vol. 37, no. 6, 2011, pp. 1111-7.
Hooper HL, Jurkschat K, Morgan AJ, et al. Comparative chronic toxicity of nanoparticulate and ionic zinc to the earthworm Eisenia veneta in a soil matrix. Environ Int. 2011;37(6):1111-7.
Hooper, H. L., Jurkschat, K., Morgan, A. J., Bailey, J., Lawlor, A. J., Spurgeon, D. J., & Svendsen, C. (2011). Comparative chronic toxicity of nanoparticulate and ionic zinc to the earthworm Eisenia veneta in a soil matrix. Environment International, 37(6), 1111-7. https://doi.org/10.1016/j.envint.2011.02.019
Hooper HL, et al. Comparative Chronic Toxicity of Nanoparticulate and Ionic Zinc to the Earthworm Eisenia Veneta in a Soil Matrix. Environ Int. 2011;37(6):1111-7. PubMed PMID: 21440301.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparative chronic toxicity of nanoparticulate and ionic zinc to the earthworm Eisenia veneta in a soil matrix. AU - Hooper,Helen L, AU - Jurkschat,Kerstin, AU - Morgan,Andrew J, AU - Bailey,Joanne, AU - Lawlor,Alan J, AU - Spurgeon,David J, AU - Svendsen,Claus, Y1 - 2011/03/26/ PY - 2010/12/09/received PY - 2011/02/27/accepted PY - 2011/3/29/entrez PY - 2011/3/29/pubmed PY - 2011/9/13/medline SP - 1111 EP - 7 JF - Environment international JO - Environ Int VL - 37 IS - 6 N2 - Manufactured nanoparticles (NPs) are increasingly being used in a range of consumer products and are already entering the environment. NP ZnO is one of the most widely used and potentially toxic NPs in aquatic exposures. It is likely that ZnO nanoparticles will also be bioavailable to soil organisms, studies on ZnO NP toxicity in a soil matrix are lacking. We exposed the earthworm Eisenia veneta to uncoated NP ZnO (<100 nm) dosed to soil and food at 250 and 750 mg Zn kg(-1) for 21 d. Concurrent exposures of equivalent ionic Zn were conducted with ZnCl(2) and for both forms effects on life history traits, immune activity and Zn body concentrations were compared. Despite slightly higher measured body concentrations, NP ZnO generally had less impact than ZnCl(2) on measured traits. At 750 mg Zn kg(-1), reproduction declined by 50% when exposed to NP ZnO but was almost completely inhibited by ZnCl(2). Similarly, immune activity was unaffected by NP ZnO but was suppressed by 20% when exposed to ZnCl(2). Scanning electron microscopy analysis of worm tissues following 24h aqueous exposure showed the presence of ZnO particles suggesting that NPs can be taken up in particulate form. This may explain the reduced effects at similar body concentrations seen in the soil study. Our findings suggest that risk assessments do not need to go beyond considering the metal component of NP ZnO in soils at least for the larger size uncoated particles considered here. SN - 1873-6750 UR - https://www.unboundmedicine.com/medline/citation/21440301/Comparative_chronic_toxicity_of_nanoparticulate_and_ionic_zinc_to_the_earthworm_Eisenia_veneta_in_a_soil_matrix_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0160-4120(11)00050-X DB - PRIME DP - Unbound Medicine ER -