期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 45, 期 11, 页码 4733-4739出版社
AMER CHEMICAL SOC
DOI: 10.1021/es104126f
关键词
-
资金
- Swedish Research Council for Environment, Agriculture Science and Spatial Planning [217-2006-547]
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 m(2) 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 chromatography 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 calored, less hydrophobic, less aromatic, and of lower molecular weight, compared to the low add treatment. This supports the hypothesis that reduction in sulfur deposition is an important driver behind the ongoing brownification of surface waters in many regions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据