Effect of Acid Deposition on Quantity and Quality of Dissolved Organic Matter in Soil-Water

Sara M. Ekstroem; Emma S. Kritzberg; Dan B. Kleja; Niklas Larsson; P. Anders Nilsson; Wilhelm Graneli; Bo Bergkvist

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Effect of Acid Deposition on Quantity and Quality of Dissolved Organic Matter in Soil-Water

机译：酸沉降对土壤水中溶解有机物数量和质量的影响

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The aim of this study was to explore how acid deposition may affect the concentration and quality of dissolved organic matter (DOM) in soil-water. This was done by a small-scale acidification experiment during two years where 0.5 X 0.5 m2 plots were artificially irrigated with water with different sulfuric acid content, and soil-water was sampled using zero-tension lysimeters under the O-horizon. The DOM was characterized using absorbance, fluorescence, and size exclusion chroma-tography analyses. Our results showed lower mobility of DOM in the high acid treatment At the same time, there was a significant change in the DOM quality. Soil-water in the high acid treatment exhibited DOM that was less colored, less hydrophobic, less aromatic, and of lower molecular weight, compared to the low acid treatment. This supports the hypothesis that reduction in sulfur deposition is an important driver behind the ongoing brownification of surface waters in many regions.

机译：这项研究的目的是探讨酸沉降如何影响土壤-水中溶解有机物（DOM）的浓度和质量。这是通过两年的小规模酸化实验完成的，其中人工灌溉了0.5 X 0.5 m2的地块，并使用了不同硫酸含量的水，并在O视线下使用零张力测渗仪对土壤水进行了采样。使用吸光度，荧光和尺寸排阻色谱分析来表征DOM。我们的结果表明，在高酸处理中DOM的迁移率较低。同时，DOM质量也发生了显着变化。与低酸处理相比，在高酸处理中的土壤水表现出的DOM着色少，疏水性差，芳族少且分子量低。这支持了以下假设：硫沉积的减少是许多地区地表水持续褐化的重要驱动力。

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《Environmental Science & Technology》 |2011年第11期|p.4733-4739|共7页
作者
Sara M. Ekstroem; Emma S. Kritzberg; Dan B. Kleja; Niklas Larsson; P. Anders Nilsson; Wilhelm Graneli; Bo Bergkvist;
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作者单位

Department of Biology/Aquatic Ecology, Plant Ecology & Systematics, Lund University, Lund, Sweden;

Department of Biology/Aquatic Ecology, Plant Ecology & Systematics, Lund University, Lund, Sweden;

Department of Soil and Environment, Swedish University of Agricultural Science, Uppsala, Sweden;

Department of Chemistry/Organic Chemistry, and Plant Ecology & Systematics, Lund University, Lund, Sweden;

Department of Biology/Aquatic Ecology, Plant Ecology & Systematics, Lund University, Lund, Sweden;

Department of Biology/Aquatic Ecology, Plant Ecology & Systematics, Lund University, Lund, Sweden;

Department of Biology/Plant Ecology & Systematics, Lund University, Lund, Sweden;

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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
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Effect of Acid Deposition on Quantity and Quality of Dissolved Organic Matter in Soil-Water

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