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Novel Multi-isotope Tracer Approach To Test ZnO Nanoparticle and Soluble Zn Bioavailability in Joint Soil Exposures.

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Title: Novel Multi-isotope Tracer Approach To Test ZnO Nanoparticle and Soluble Zn Bioavailability in Joint Soil Exposures.
Authors: Laycock, Adam1,2 adain.laycocic@univie.ac.at, Romero-Freire, Ana3,4, Najorka, Jens5, Svendsen, Claus6, Gestel, Cornelis A. M. van7, Rehkämper, Mark1
Source: Environmental Science & Technology. 11/7/2017, Vol. 51 Issue 21, p12756-12763. 8p.
Subjects: Stable isotope tracers, Zinc oxide, Bioavailability, Metal content of soils, Nanoparticles & the environment
Abstract: Here we use two enriched stable isotopes, 68Znen, and 64Znen (>99%), to prepare 68ZnO nanopartides (NPs) and soluble 64ZnCl2. The standard LUFA 2.2 test soil was dosed with 68ZnO NPs and soluble 64ZnCl2 to 5 mg kg-1 each, plus between 0 and 95 mg kg-1 of soluble ZnCl2 with a natural isotope composition. After 0, 1, 3, 6, and 12 months of soil incubation, earthworms (Eisenia andrei) were introduced for 72 h exposures. Analyses of soils, pore waters, and earthworm tissues using multiple collector inductively coupled plasma mass spectrometry allowed the simultaneous measurement of the diagnostic 68Zn/66Zn, 64Zn/66Zn, and 68Zn/64Zn ratios, from which the three different isotopic forms of Zn were quantified. Eisenia andrei was able to regulate Zn body concentrations with no difference observed between the different total dosing concentrations. The accumulation of labeled Zn by the earthworms showed a direct relationship with the proportion of labeled to total Zn in the pore water, which increased with longer soil incubation times and decreasing soil pH. The 68Znen/64Znen ratios determined for earthworms (1.09 ± 0.04), soils (1.09 ± 0.02), and pore waters (1.08 ± 0.02) indicate indistinguishable environmental distribution and uptake of the Zn forms, most likely due to rapid dissolution of the ZnO NPs. [ABSTRACT FROM AUTHOR]
Copyright of Environmental Science & Technology is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 128814771
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  Data: Novel Multi-isotope Tracer Approach To Test ZnO Nanoparticle and Soluble Zn Bioavailability in Joint Soil Exposures.
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  Data: <searchLink fieldCode="AR" term="%22Laycock%2C+Adam%22">Laycock, Adam</searchLink><relatesTo>1,2</relatesTo><i> adain.laycocic@univie.ac.at</i><br /><searchLink fieldCode="AR" term="%22Romero-Freire%2C+Ana%22">Romero-Freire, Ana</searchLink><relatesTo>3,4</relatesTo><br /><searchLink fieldCode="AR" term="%22Najorka%2C+Jens%22">Najorka, Jens</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Svendsen%2C+Claus%22">Svendsen, Claus</searchLink><relatesTo>6</relatesTo><br /><searchLink fieldCode="AR" term="%22Gestel%2C+Cornelis+A%2E+M%2E+van%22">Gestel, Cornelis A. M. van</searchLink><relatesTo>7</relatesTo><br /><searchLink fieldCode="AR" term="%22Rehkämper%2C+Mark%22">Rehkämper, Mark</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Environmental+Science+%26+Technology%22">Environmental Science & Technology</searchLink>. 11/7/2017, Vol. 51 Issue 21, p12756-12763. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Stable+isotope+tracers%22">Stable isotope tracers</searchLink><br /><searchLink fieldCode="DE" term="%22Zinc+oxide%22">Zinc oxide</searchLink><br /><searchLink fieldCode="DE" term="%22Bioavailability%22">Bioavailability</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+content+of+soils%22">Metal content of soils</searchLink><br /><searchLink fieldCode="DE" term="%22Nanoparticles+%26+the+environment%22">Nanoparticles & the environment</searchLink>
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  Data: Here we use two enriched stable isotopes, <sup1>68</sup1>Znen, and <sup1>64</sup1>Znen (>99%), to prepare <sup1>68</sup1>ZnO nanopartides (NPs) and soluble <sup1>64</sup1>ZnCl2. The standard LUFA 2.2 test soil was dosed with <sup1>68</sup1>ZnO NPs and soluble <sup1>64</sup1>ZnCl2 to 5 mg kg<sup1>-1</sup1> each, plus between 0 and 95 mg kg<sup1>-1</sup1> of soluble ZnCl2 with a natural isotope composition. After 0, 1, 3, 6, and 12 months of soil incubation, earthworms (Eisenia andrei) were introduced for 72 h exposures. Analyses of soils, pore waters, and earthworm tissues using multiple collector inductively coupled plasma mass spectrometry allowed the simultaneous measurement of the diagnostic <sup1>68</sup1>Zn/<sup1>66</sup1>Zn, <sup1>64</sup1>Zn/<sup1>66</sup1>Zn, and <sup1>68</sup1>Zn<sup1>/64</sup1>Zn ratios, from which the three different isotopic forms of Zn were quantified. Eisenia andrei was able to regulate Zn body concentrations with no difference observed between the different total dosing concentrations. The accumulation of labeled Zn by the earthworms showed a direct relationship with the proportion of labeled to total Zn in the pore water, which increased with longer soil incubation times and decreasing soil pH. The <sup1>68</sup1>Znen/<sup1>64</sup1>Znen ratios determined for earthworms (1.09 ± 0.04), soils (1.09 ± 0.02), and pore waters (1.08 ± 0.02) indicate indistinguishable environmental distribution and uptake of the Zn forms, most likely due to rapid dissolution of the ZnO NPs. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Environmental Science & Technology is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1021/acs.est.7b02944
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 12756
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      – SubjectFull: Stable isotope tracers
        Type: general
      – SubjectFull: Zinc oxide
        Type: general
      – SubjectFull: Bioavailability
        Type: general
      – SubjectFull: Metal content of soils
        Type: general
      – SubjectFull: Nanoparticles & the environment
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      – TitleFull: Novel Multi-isotope Tracer Approach To Test ZnO Nanoparticle and Soluble Zn Bioavailability in Joint Soil Exposures.
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              M: 11
              Text: 11/7/2017
              Type: published
              Y: 2017
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