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

Ekström, Sara LU ; Kritzberg, Emma LU ; Kleja, Dan B; Larsson, Niklas LU ; Nilsson, Anders LU ; Granéli, Wilhelm LU and Bergkvist, Bo LU (2011) In Environmental Science & Technology 45(11). p.4733-4739
Abstract
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 × 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 colored, less hydrophobic, less aromatic,... (More)
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 × 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 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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Environmental Science & Technology
volume
45
issue
11
pages
4733 - 4739
publisher
The American Chemical Society
external identifiers
  • wos:000291128700013
  • pmid:21528901
  • scopus:79957792923
ISSN
1520-5851
DOI
10.1021/es104126f
project
BECC
language
English
LU publication?
yes
id
387affbf-183b-4dc0-a159-bbfa22993360 (old id 1973365)
date added to LUP
2011-07-14 10:29:06
date last changed
2017-08-13 03:51:05
@article{387affbf-183b-4dc0-a159-bbfa22993360,
  abstract     = {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 × 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 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.},
  author       = {Ekström, Sara and Kritzberg, Emma and Kleja, Dan B and Larsson, Niklas and Nilsson, Anders and Granéli, Wilhelm and Bergkvist, Bo},
  issn         = {1520-5851},
  language     = {eng},
  number       = {11},
  pages        = {4733--4739},
  publisher    = {The American Chemical Society},
  series       = {Environmental Science & Technology},
  title        = {Effect of Acid Deposition on Quantity and Quality of Dissolved Organic Matter in Soil-Water.},
  url          = {http://dx.doi.org/10.1021/es104126f},
  volume       = {45},
  year         = {2011},
}