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COPPER INHIBITION OF SOIL ORGANIC MATTER DECOMPOSITION IN A SEVENTY-YEAR FIELD EXPOSURE

机译:十年来土壤中铜对土壤有机物分解的抑制作用

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摘要

On a site contaminated decades ago with Cu from a wood treatment facility, we can observe that the decomposition of soil organic matter has been slowed. This represents an exceptional data set, and it allows us to address many challenges faced by regulators and risk assessors who are trying to derive appropriate soil quality criteria. These data are representative of a field study with a very well-equilibrated contamination and allow the derivation of chronic toxicity threshold values for the inhibition of microbial respiration. Soil respiration is the main determinant of the carbon balance, and it is assessed using the accumulation of soil organic matter (SOM) in this case. Using data derived from a 70-year-old field study also has the advantage of not being subject to risk assessment uncertainty factors arising from the potential aging effects of spiked soil or to the uncertainty caused by laboratory-to-field differences, both of which are very difficult to address. The resulting toxicity thresholds for an inhibition of SOM degradation are 154, 193, and 285 mg Cu/kg dry soil for inhibition levels of 10, 20, and 50%, respectively. Setting those thresholds correctly is critical for a proper risk assessment relative to sustainable development and agriculture.
机译:在几十年前受到木材处理设施污染的铜污染现场,我们可以观察到土壤有机物的分解已经减缓。这代表了一个特殊的数据集,它使我们能够应对试图得出适当土壤质量标准的监管者和风险评估者所面临的许多挑战。这些数据代表了具有非常均衡的污染的现场研究,并允许推导用于抑制微生物呼吸的慢性毒性阈值。土壤呼吸是决定碳平衡的主要因素,在这种情况下,它是利用土壤有机质(SOM)的积累进行评估的。使用来自已有70年历史的实地研究得出的数据的优势还在于,它不受制于因加标土壤的潜在老化效应而产生的风险评估不确定性因素,也不受制于实验室与现场之间的差异所引起的不确定性。很难解决。所产生的抑制SOM降解的毒性阈值分别为154、193和285 mg Cu / kg干燥土壤,抑制水平分别为10%,20%和50%。正确设置这些阈值对于与可持续发展和农业相关的正确风险评估至关重要。

著录项

  • 来源
    《Environmental Toxicology and Chemistry》 |2006年第3期|p.854-857|共4页
  • 作者

    Sébastien Sauvé;

  • 作者单位

    Environmental Chemistry Laboratory, Department of Chemistry, Université de Montréal, P.O. 6128 Centre-ville, Montreal, Quebec H3C 3J7, 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Soil respiration, Microbial processes, Soil quality criteria;

    机译:土壤呼吸;微生物过程;土壤质量标准;
  • 入库时间 2022-08-17 23:32:07

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