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首页> 外文期刊>Environmental Science & Technology >Organic Matter Chlorination Rates in Different Boreal Soils: The Role of Soil Organic Matter Content
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Organic Matter Chlorination Rates in Different Boreal Soils: The Role of Soil Organic Matter Content

机译：不同北方土壤有机质氯化率：土壤有机质含量的作用

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摘要

Transformation of chloride (Cl~-) to organic chlorine (Cl_(org)) occurs naturally in soil but it is poorly understood how and why transformation rates vary among environments. There are still few measurements of chlorination rates in soils, even though formation of Cl_(org) has been known for two decades. In the present study, we compare organic matter (OM) chlorination rates, measured by ~(36)Cl tracer experiments, in soils from eleven different locations (coniferous forest soils, pasture soils and agricultural soils) and discuss how various environmental factors effect chlorination. Chlorination rates were highest in the forest soils and strong correlations were seen with environmental variables such as soil OM content and Cl~ concentration. Data presented support the hypothesis that OM levels give the framework for the soil chlorine cycling and that chlorination in more organic soils over time leads to a larger Cl_(org) pool and in turn to a high internal supply of Cl~- upon dechlorination. This provides unexpected indications that pore water Cl~- levels may be controlled by supply from dechlorination processes and can explain why soil Cl~- locally can be more closely related to soil OM content and the amount organically bound chlorine than to Cl~- deposition.
机译：氯化物（Cl〜-）向有机氯（Cl_（org））的转化自然发生在土壤中，但人们对转化率如何以及为什么在环境中变化的了解很少。尽管Cl_（org）的形成已经知道了二十年，但土壤中氯化率的测量仍然很少。在本研究中，我们比较了〜（36）Cl示踪剂实验在11个不同位置（针叶林土壤，牧场土壤和农业土壤）的土壤中有机物（OM）的氯化率，并讨论了各种环境因素如何影响氯化作用。森林土壤中的氯化率最高，并且与环境变量（如土壤有机质含量和Cl〜浓度）具有很强的相关性。所提供的数据支持以下假设：OM水平为土壤氯循环提供了框架，并且随着时间的推移，更多有机土壤中的氯化会导致更大的Cl_（org）池，进而导致脱氯时Cl_-的内部高供给。这提供了意想不到的迹象，表明孔隙水中Cl_-的水平可以通过脱氯过程的供应来控制，并且可以解释为什么土壤Cl_-局部地与土壤OM含量和有机结合氯的量比与Cl_-沉积更紧密地相关。

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  • 来源
    《Environmental Science & Technology》 |2012年第3期|p.1504-1510|共7页
  • 作者

    Malin Gustavsson; Susanne Karlsson; Gunilla OEberg; Per Sanden; Teresia Svensson; Salar Valinia; Yves Thiry; David Bastviken;

  • 作者单位

    Department of Thematic Studies, Water and Environmental Studies, Linkoping University, 58183 Linkoping, Sweden;

    Department of Thematic Studies, Water and Environmental Studies, Linkoping University, 58183 Linkoping, Sweden;

    Institute for Resources, Environment and Sustainability, University of British Columbia, 428-2202 Main Mall Vancouver, British Columbia, Canada, V6T 1Z4;

    Department of Thematic Studies, Water and Environmental Studies, Linkoping University, 58183 Linkoping, Sweden;

    Department of Thematic Studies, Water and Environmental Studies, Linkoping University, 58183 Linkoping, Sweden;

    Department of Aquatic Sciences and Assessment SLU, Swedish University of Agricultural Sciences, P.O. Box 7050, SE 75007 Uppsala, Sweden;

    Andra, Research and Development Division, 1/7 rue Jean-Monnet, 92298 Chatenay-Malabry Cedex, France;

    Department of Thematic Studies, Water and Environmental Studies, Linkoping University, 58183 Linkoping, Sweden;

  • 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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