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Influence of soil pH on the toxicity of zinc oxide nanoparticles to the terrestrial isopod Porcellionides pruinosus.
Environ Toxicol Chem. 2013 Dec; 32(12):2808-15.ET

Abstract

The effects of soil pH on the toxicity of ZnO nanoparticles (NPs) to the terrestrial isopod Porcellionides pruinosus were evaluated. Isopods were exposed to a natural soil amended with CaCO3 to reach 3 different pH(CaCl2) levels (4.5, 6.2, and 7.3) and to standard LUFA 2.2 soil (pH 5.5) spiked with ZnO NPs (30 nm), non-nano ZnO (200 nm), and ionic Zn as ZnCl₂. Toxicity was expressed based on total Zn concentration in soil, as well as total Zn and free Zn²⁺ ion concentrations in porewater. Compared with ZnO-spiked soils, the ZnCl₂-spiked soils had lower pH and higher porewater Ca²⁺ and Zn levels. Isopod survival did not differ between Zn forms and soils, but survival was higher for isopods exposed to ZnO NPs at pH 4.5. Median effect concentrations (EC50s) for biomass change showed similar trends for all Zn forms in all soils, with higher values at intermediate pH. Median lethal concentration (LC50) and EC50 values based on porewater Zn or free Zn ion concentrations were much lower for ZnO than for ionic zinc. Zn body concentrations increased in a dose-related manner, but no effect of soil pH was found. It is suggested not only that dissolved or free Zn in porewater contributed to uptake and toxicity, but also that oral uptake (i.e., ingestion of soil particles) could be an important additional route of exposure.

Authors+Show Affiliations

Department of Biology and CESAM - Centre for Environmental and Marine Studies, University of Aveiro, Aveiro, Portugal.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

23983054

Citation

Tourinho, Paula S., et al. "Influence of Soil pH On the Toxicity of Zinc Oxide Nanoparticles to the Terrestrial Isopod Porcellionides Pruinosus." Environmental Toxicology and Chemistry, vol. 32, no. 12, 2013, pp. 2808-15.
Tourinho PS, van Gestel CA, Lofts S, et al. Influence of soil pH on the toxicity of zinc oxide nanoparticles to the terrestrial isopod Porcellionides pruinosus. Environ Toxicol Chem. 2013;32(12):2808-15.
Tourinho, P. S., van Gestel, C. A., Lofts, S., Soares, A. M., & Loureiro, S. (2013). Influence of soil pH on the toxicity of zinc oxide nanoparticles to the terrestrial isopod Porcellionides pruinosus. Environmental Toxicology and Chemistry, 32(12), 2808-15. https://doi.org/10.1002/etc.2369
Tourinho PS, et al. Influence of Soil pH On the Toxicity of Zinc Oxide Nanoparticles to the Terrestrial Isopod Porcellionides Pruinosus. Environ Toxicol Chem. 2013;32(12):2808-15. PubMed PMID: 23983054.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of soil pH on the toxicity of zinc oxide nanoparticles to the terrestrial isopod Porcellionides pruinosus. AU - Tourinho,Paula S, AU - van Gestel,Cornelis A M, AU - Lofts,Stephen, AU - Soares,Amadeu M V M, AU - Loureiro,Susana, Y1 - 2013/10/18/ PY - 2013/07/01/received PY - 2013/08/10/revised PY - 2013/08/19/accepted PY - 2013/8/29/entrez PY - 2013/8/29/pubmed PY - 2014/5/3/medline KW - Bioavailability KW - Isopods KW - Soil pH KW - Toxicology KW - ZnO nanoparticles SP - 2808 EP - 15 JF - Environmental toxicology and chemistry JO - Environ Toxicol Chem VL - 32 IS - 12 N2 - The effects of soil pH on the toxicity of ZnO nanoparticles (NPs) to the terrestrial isopod Porcellionides pruinosus were evaluated. Isopods were exposed to a natural soil amended with CaCO3 to reach 3 different pH(CaCl2) levels (4.5, 6.2, and 7.3) and to standard LUFA 2.2 soil (pH 5.5) spiked with ZnO NPs (30 nm), non-nano ZnO (200 nm), and ionic Zn as ZnCl₂. Toxicity was expressed based on total Zn concentration in soil, as well as total Zn and free Zn²⁺ ion concentrations in porewater. Compared with ZnO-spiked soils, the ZnCl₂-spiked soils had lower pH and higher porewater Ca²⁺ and Zn levels. Isopod survival did not differ between Zn forms and soils, but survival was higher for isopods exposed to ZnO NPs at pH 4.5. Median effect concentrations (EC50s) for biomass change showed similar trends for all Zn forms in all soils, with higher values at intermediate pH. Median lethal concentration (LC50) and EC50 values based on porewater Zn or free Zn ion concentrations were much lower for ZnO than for ionic zinc. Zn body concentrations increased in a dose-related manner, but no effect of soil pH was found. It is suggested not only that dissolved or free Zn in porewater contributed to uptake and toxicity, but also that oral uptake (i.e., ingestion of soil particles) could be an important additional route of exposure. SN - 1552-8618 UR - https://www.unboundmedicine.com/medline/citation/23983054/Influence_of_soil_pH_on_the_toxicity_of_zinc_oxide_nanoparticles_to_the_terrestrial_isopod_Porcellionides_pruinosus_ L2 - https://doi.org/10.1002/etc.2369 DB - PRIME DP - Unbound Medicine ER -