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Influence of phosphate and solution pH on the mobility of ZnO nanoparticles in saturated sand.
Sci Total Environ. 2014 Feb 15; 472:971-8.ST

Abstract

The mobility of nanoparticles (NPs) strongly depends on the chemical characterization of the environmental medium. However, the influence of phosphate on NPs mobility was ignored by scientists despite the serious phosphate contamination in natural environments. Hence, the influence of phosphate and solution pH on the mobility of zinc oxide nanoparticles (ZnO-NPs) was investigated in water-saturated sand representative of groundwater aquifers, which encompassed a range of P/Zn molar ratios (P/Zn: 0-4) and pH (4.8-10.0). The transport of ZnO-NPs was dramatically enhanced in the presence of phosphate, even at a low P/Zn molar ratio namely 0.25, and the retention of ZnO-NPs in the saturated sand decreased with increasing P/Zn molar ratio. Moreover, attachment efficiencies (α) and deposition rates (kd) of ZnO-NPs rapidly decreased with increasing P/Zn molar ratio. In contrast, the solution pH had negligible effects on ZnO-NP transport behavior under phosphate-abundant condition (P/Zn: 4). The distinct effects may be explained by the energy interaction between ZnO-NPs and sand surface under different conditions. Interestingly, under phosphate-abundant condition (P/Zn: 4), solution pH could strongly affect the transport of Zn(2+) in the water-saturated sand. Overall, this study outlines the importance of taking account of phosphate into risk assessment of NPs in the environment.

Authors+Show Affiliations

Institute of Water Quality Control, Technische Universität München, Am Coulombwall 8, 85747 Garching, Germany; Department of Chemistry, Technische Universität München, Lichtenbergstraβe 4, 85747 Garching, Germany.Department of Chemistry, Technische Universität München, Lichtenbergstraβe 4, 85747 Garching, Germany. Electronic address: michael.schuster@ch.tum.de.

Pub Type(s)

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

Language

eng

PubMed ID

24355393

Citation

Li, Lingxiangyu, and Michael Schuster. "Influence of Phosphate and Solution pH On the Mobility of ZnO Nanoparticles in Saturated Sand." The Science of the Total Environment, vol. 472, 2014, pp. 971-8.
Li L, Schuster M. Influence of phosphate and solution pH on the mobility of ZnO nanoparticles in saturated sand. Sci Total Environ. 2014;472:971-8.
Li, L., & Schuster, M. (2014). Influence of phosphate and solution pH on the mobility of ZnO nanoparticles in saturated sand. The Science of the Total Environment, 472, 971-8. https://doi.org/10.1016/j.scitotenv.2013.11.057
Li L, Schuster M. Influence of Phosphate and Solution pH On the Mobility of ZnO Nanoparticles in Saturated Sand. Sci Total Environ. 2014 Feb 15;472:971-8. PubMed PMID: 24355393.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of phosphate and solution pH on the mobility of ZnO nanoparticles in saturated sand. AU - Li,Lingxiangyu, AU - Schuster,Michael, Y1 - 2013/12/17/ PY - 2013/10/07/received PY - 2013/11/12/revised PY - 2013/11/12/accepted PY - 2013/12/21/entrez PY - 2013/12/21/pubmed PY - 2014/9/5/medline KW - Mobility KW - Phosphate KW - Solution pH KW - Water-saturated sand KW - ZnO nanoparticles SP - 971 EP - 8 JF - The Science of the total environment JO - Sci Total Environ VL - 472 N2 - The mobility of nanoparticles (NPs) strongly depends on the chemical characterization of the environmental medium. However, the influence of phosphate on NPs mobility was ignored by scientists despite the serious phosphate contamination in natural environments. Hence, the influence of phosphate and solution pH on the mobility of zinc oxide nanoparticles (ZnO-NPs) was investigated in water-saturated sand representative of groundwater aquifers, which encompassed a range of P/Zn molar ratios (P/Zn: 0-4) and pH (4.8-10.0). The transport of ZnO-NPs was dramatically enhanced in the presence of phosphate, even at a low P/Zn molar ratio namely 0.25, and the retention of ZnO-NPs in the saturated sand decreased with increasing P/Zn molar ratio. Moreover, attachment efficiencies (α) and deposition rates (kd) of ZnO-NPs rapidly decreased with increasing P/Zn molar ratio. In contrast, the solution pH had negligible effects on ZnO-NP transport behavior under phosphate-abundant condition (P/Zn: 4). The distinct effects may be explained by the energy interaction between ZnO-NPs and sand surface under different conditions. Interestingly, under phosphate-abundant condition (P/Zn: 4), solution pH could strongly affect the transport of Zn(2+) in the water-saturated sand. Overall, this study outlines the importance of taking account of phosphate into risk assessment of NPs in the environment. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/24355393/Influence_of_phosphate_and_solution_pH_on_the_mobility_of_ZnO_nanoparticles_in_saturated_sand_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(13)01340-5 DB - PRIME DP - Unbound Medicine ER -