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Short-term soil bioassays may not reveal the full toxicity potential for nanomaterials; bioavailability and toxicity of silver ions (AgNO₃) and silver nanoparticles to earthworm Eisenia fetida in long-term aged soils.
Environ Pollut. 2015 Aug; 203:191-198.EP

Abstract

This study investigated if standard risk assessment hazard tests are long enough to adequately provide the worst case exposure for nanomaterials. This study therefore determined the comparative effects of the aging on the bioavailability and toxicity to earthworms of soils dosed with silver ions and silver nanoparticles (Ag NP) for 1, 9, 30 & 52 weeks, and related this to the total Ag in the soil, Ag in soil pore water and earthworm tissue Ag concentrations. For ionic Ag, a classical pattern of reduced bioavailability and toxicity with time aged in the soil was observed. For the Ag NP, toxicity increased with time apparently driven by Ag ion dissolution from the added Ag NPs. Internal Ag in the earthworms did not always explain toxicity and suggested the presence of an internalised, low-toxicity Ag fraction (as intact or transformed NPs) after shorter aging times. Our results indicate that short-term exposures, without long-term soil aging, are not able to properly assess the environmental risk of Ag NPs and that ultimately, with aging time, Ag ion and Ag NP effect will merge to a common value.

Authors+Show Affiliations

Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK. Electronic address: mdiez@leitat.org.Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK.Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK.Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK; Department of Ecological Science, Faculty of Earth and Life Sciences, VU University, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands.Department of Ecological Science, Faculty of Earth and Life Sciences, VU University, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands.Department of Materials, Oxford University, Begbroke Science Park, Sandy Lane, Yarnton, Oxford OX5 1PF, UK.Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK.Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, UK.

Pub Type(s)

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

Language

eng

PubMed ID

25910462

Citation

Diez-Ortiz, Maria, et al. "Short-term Soil Bioassays May Not Reveal the Full Toxicity Potential for Nanomaterials; Bioavailability and Toxicity of Silver Ions (AgNO₃) and Silver Nanoparticles to Earthworm Eisenia Fetida in Long-term Aged Soils." Environmental Pollution (Barking, Essex : 1987), vol. 203, 2015, pp. 191-198.
Diez-Ortiz M, Lahive E, George S, et al. Short-term soil bioassays may not reveal the full toxicity potential for nanomaterials; bioavailability and toxicity of silver ions (AgNO₃) and silver nanoparticles to earthworm Eisenia fetida in long-term aged soils. Environ Pollut. 2015;203:191-198.
Diez-Ortiz, M., Lahive, E., George, S., Ter Schure, A., Van Gestel, C. A. M., Jurkschat, K., Svendsen, C., & Spurgeon, D. J. (2015). Short-term soil bioassays may not reveal the full toxicity potential for nanomaterials; bioavailability and toxicity of silver ions (AgNO₃) and silver nanoparticles to earthworm Eisenia fetida in long-term aged soils. Environmental Pollution (Barking, Essex : 1987), 203, 191-198. https://doi.org/10.1016/j.envpol.2015.03.033
Diez-Ortiz M, et al. Short-term Soil Bioassays May Not Reveal the Full Toxicity Potential for Nanomaterials; Bioavailability and Toxicity of Silver Ions (AgNO₃) and Silver Nanoparticles to Earthworm Eisenia Fetida in Long-term Aged Soils. Environ Pollut. 2015;203:191-198. PubMed PMID: 25910462.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Short-term soil bioassays may not reveal the full toxicity potential for nanomaterials; bioavailability and toxicity of silver ions (AgNO₃) and silver nanoparticles to earthworm Eisenia fetida in long-term aged soils. AU - Diez-Ortiz,Maria, AU - Lahive,Elma, AU - George,Suzanne, AU - Ter Schure,Anneke, AU - Van Gestel,Cornelis A M, AU - Jurkschat,Kerstin, AU - Svendsen,Claus, AU - Spurgeon,David J, Y1 - 2015/04/21/ PY - 2014/10/03/received PY - 2015/03/16/revised PY - 2015/03/23/accepted PY - 2015/4/26/entrez PY - 2015/4/26/pubmed PY - 2016/1/20/medline KW - Aging KW - Bioavailability KW - Dissolution KW - Earthworm KW - Silver nanoparticles SP - 191 EP - 198 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 203 N2 - This study investigated if standard risk assessment hazard tests are long enough to adequately provide the worst case exposure for nanomaterials. This study therefore determined the comparative effects of the aging on the bioavailability and toxicity to earthworms of soils dosed with silver ions and silver nanoparticles (Ag NP) for 1, 9, 30 & 52 weeks, and related this to the total Ag in the soil, Ag in soil pore water and earthworm tissue Ag concentrations. For ionic Ag, a classical pattern of reduced bioavailability and toxicity with time aged in the soil was observed. For the Ag NP, toxicity increased with time apparently driven by Ag ion dissolution from the added Ag NPs. Internal Ag in the earthworms did not always explain toxicity and suggested the presence of an internalised, low-toxicity Ag fraction (as intact or transformed NPs) after shorter aging times. Our results indicate that short-term exposures, without long-term soil aging, are not able to properly assess the environmental risk of Ag NPs and that ultimately, with aging time, Ag ion and Ag NP effect will merge to a common value. SN - 1873-6424 UR - https://www.unboundmedicine.com/medline/citation/25910462/Short_term_soil_bioassays_may_not_reveal_the_full_toxicity_potential_for_nanomaterials L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(15)00163-3 DB - PRIME DP - Unbound Medicine ER -