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首页> 外文期刊>Environmental Science & Technology >Differences in Soil Solution Chemistry between Soils Amended with Nanosized CuO or Cu Reference Materials: Implications for Nanotoxicity Tests
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Differences in Soil Solution Chemistry between Soils Amended with Nanosized CuO or Cu Reference Materials: Implications for Nanotoxicity Tests

机译：纳米尺寸的CuO或Cu标准物质修正的土壤之间的土壤溶液化学差异：纳米毒性测试的意义

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摘要

Soil toxicity tests for metal oxide nanoparticles often include micrometer-sized oxide and metal salt treatments to distinguish between toxicity from nanomcter-sized particles, non-nanometer-sized parades, and dissolved ions. Test result will be confounded if each chemical form has different effects on soil solution chemistry. We report on changes in soil solution chemistry over 56 days-the duration of some standard soil toxicity tests-in three soils amended with 500 mg/kg Cu as nanometer-sized CuO (nano), micrometer-sized CuO (micrometer), or Cu(NO_3)_2 (salt). In the CuO-amended soils, the log Cu~(2+) activity was initially low (minimum -9.48) and increased with time (maximum -5.20), whereas in the salt-amended sots it was initially high (maximum -4.80) and decreased with time (minimum -6.10). The Cu~(2+) activity in the nano-amended soils was higher than in the micrometer-amended soils for at least the first 11 days, and lower than in the salt- amended soils for at least 28 d. The pH, and dissolved Ca and Mg concentrations in the CuO-amended soils were similar, but the salt-amended soils had lower pH for at least 14 d, and higher Ca and Mg concentrations throughout the test Soil pretreatments such as leaching and aging prior to toxicity tests are suggested.
机译：金属氧化物纳米颗粒的土壤毒性测试通常包括微米级的氧化物和金属盐处理，以区分纳米级，非纳米级游行和溶解离子的毒性。如果每种化学形式对土壤溶液化学的影响不同，则测试结果将会混淆。我们报告了在56天（某些标准土壤毒性测试的持续时间）中的土壤溶液化学变化-在三种以500毫克/千克铜修正为纳米级CuO（纳米），微米级CuO（微米）或Cu的土壤中（NO_3）_2（盐）。在经过CuO处理的土壤中，对数Cu〜（2+）活性最初较低（最低-9.48），并随时间增加（最高-5.20），而在经过盐改良的烟灰中，其最初较高（最高-4.80）。并随时间减少（最低-6.10）。至少在最初的11天中，纳米改良土壤中的Cu〜（2+）活性高于微米改良土壤，至少28 d低于盐改良土壤。 CuO改良土壤中的pH值和溶解的Ca和Mg浓度相似，但是盐改良土壤在至少14 d内具有较低的pH值，并且在整个测试土壤预处理（例如浸出和老化）中的Ca和Mg浓度较高。建议进行毒性试验。

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  • 来源
    《Environmental Science & Technology》 |2014年第14期|8135-8142|共8页
  • 作者

    Heather V. A. McShane; Geoffrey I. Sunahara; Joann K. Whalen; William H. Hendershot;

  • 作者单位

    Department of Natural Resource Sciences, McGill University, 21,111 Lakeshore Drive, Ste-Anne-de-Bellevue, Quebec H9X 3V9, Canada;

    National Research Council-Canada, 6100 Royalmount Avenue, Montreal, Quebec H4P 2R2, Canada;

    Department of Natural Resource Sciences, McGill University, 21,111 Lakeshore Drive, Ste-Anne-de-Bellevue, Quebec H9X 3V9, Canada;

    Department of Natural Resource Sciences, McGill University, 21,111 Lakeshore Drive, Ste-Anne-de-Bellevue, Quebec H9X 3V9, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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