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Effect of soil organic matter content and pH on the toxicity of ZnO nanoparticles to Folsomia candida.
Ecotoxicol Environ Saf. 2014 Oct; 108:9-15.EE

Abstract

Organic matter (OM) and pH may influence nanoparticle fate and effects in soil. This study investigated the influence of soil organic matter content and pH on the toxicity of ZnO-NP and ZnCl2 to Folsomia candida in four natural soils, having between 2.37% and 14.7% OM and [Formula: see text] levels between 5.0 and 6.8. Porewater Zn concentrations were much lower in ZnO-NP than in ZnCl2 spiked soils, resulting in higher Freundlich sorption constants for ZnO-NP. For ZnCl2 the porewater Zn concentrations were significantly higher in less organic soils, while for ZnO-NP the highest soluble Zn level (23mgZn/l) was measured in the most organic soil, which had the lowest pH. Free Zn(2+) ion concentrations were higher for ZnCl2 than for ZnO-NP and were greatly dependent on pH (pHpw) and dissolved organic carbon content of the pore water. The 28-d EC50 values for the effect of ZnCl2 on the reproduction of F. candida increased with increasing OM content from 356 to 1592mgZn/kg d.w. For ZnO-NP no correlation between EC50 values and OM content was found and EC50 values ranged from 1695 in the most organic soil to 4446mgZn/kg d.w. in the higher pH soil. When based on porewater and free Zn(2+) concentrations, EC50 values were higher for ZnCl2 than for ZnO-NP, and consistently decreased with increasing pHpw. This study shows that ZnO-NP toxicity is dependent on soil properties, but is mainly driven by soil pH.

Authors+Show Affiliations

Department of Ecological Science, Faculty of Earth and Life Sciences, VU University, Amsterdam, The Netherlands.Aquatic Ecology, Faculty of Biology, University Duisburg-Essen, Essen, Germany.Centre for Ecology and Hydrology, Lancaster Environment Centre, Lancaster, United Kingdom.Centre for Ecology and Hydrology, Wallingford, Oxfordshire, United Kingdom.Department of Ecological Science, Faculty of Earth and Life Sciences, VU University, Amsterdam, The Netherlands. Electronic address: kees.van.gestel@vu.nl.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

25038266

Citation

Waalewijn-Kool, Pauline L., et al. "Effect of Soil Organic Matter Content and pH On the Toxicity of ZnO Nanoparticles to Folsomia Candida." Ecotoxicology and Environmental Safety, vol. 108, 2014, pp. 9-15.
Waalewijn-Kool PL, Rupp S, Lofts S, et al. Effect of soil organic matter content and pH on the toxicity of ZnO nanoparticles to Folsomia candida. Ecotoxicol Environ Saf. 2014;108:9-15.
Waalewijn-Kool, P. L., Rupp, S., Lofts, S., Svendsen, C., & van Gestel, C. A. (2014). Effect of soil organic matter content and pH on the toxicity of ZnO nanoparticles to Folsomia candida. Ecotoxicology and Environmental Safety, 108, 9-15. https://doi.org/10.1016/j.ecoenv.2014.06.031
Waalewijn-Kool PL, et al. Effect of Soil Organic Matter Content and pH On the Toxicity of ZnO Nanoparticles to Folsomia Candida. Ecotoxicol Environ Saf. 2014;108:9-15. PubMed PMID: 25038266.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of soil organic matter content and pH on the toxicity of ZnO nanoparticles to Folsomia candida. AU - Waalewijn-Kool,Pauline L, AU - Rupp,Svenja, AU - Lofts,Stephen, AU - Svendsen,Claus, AU - van Gestel,Cornelis A M, Y1 - 2014/07/17/ PY - 2014/03/24/received PY - 2014/06/24/revised PY - 2014/06/25/accepted PY - 2014/7/20/entrez PY - 2014/7/20/pubmed PY - 2014/12/15/medline KW - Bioavailability KW - Folsomia candida KW - Organic matter content KW - Soil pH KW - Zinc oxide nanoparticles SP - 9 EP - 15 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 108 N2 - Organic matter (OM) and pH may influence nanoparticle fate and effects in soil. This study investigated the influence of soil organic matter content and pH on the toxicity of ZnO-NP and ZnCl2 to Folsomia candida in four natural soils, having between 2.37% and 14.7% OM and [Formula: see text] levels between 5.0 and 6.8. Porewater Zn concentrations were much lower in ZnO-NP than in ZnCl2 spiked soils, resulting in higher Freundlich sorption constants for ZnO-NP. For ZnCl2 the porewater Zn concentrations were significantly higher in less organic soils, while for ZnO-NP the highest soluble Zn level (23mgZn/l) was measured in the most organic soil, which had the lowest pH. Free Zn(2+) ion concentrations were higher for ZnCl2 than for ZnO-NP and were greatly dependent on pH (pHpw) and dissolved organic carbon content of the pore water. The 28-d EC50 values for the effect of ZnCl2 on the reproduction of F. candida increased with increasing OM content from 356 to 1592mgZn/kg d.w. For ZnO-NP no correlation between EC50 values and OM content was found and EC50 values ranged from 1695 in the most organic soil to 4446mgZn/kg d.w. in the higher pH soil. When based on porewater and free Zn(2+) concentrations, EC50 values were higher for ZnCl2 than for ZnO-NP, and consistently decreased with increasing pHpw. This study shows that ZnO-NP toxicity is dependent on soil properties, but is mainly driven by soil pH. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/25038266/Effect_of_soil_organic_matter_content_and_pH_on_the_toxicity_of_ZnO_nanoparticles_to_Folsomia_candida_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0147-6513(14)00287-5 DB - PRIME DP - Unbound Medicine ER -