Influence of soil conditions on dissolved organic matter leached from forest and wetland soils: a controlled growth chamber study

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• 作者：Eun-Ah Kim ; Hang Vo-Minh Nguyen ; Hae Sung Oh…
• 关键词：Dissolved organic matter (DOM) ; Drying ; rewetting ; PARAFAC ; Fluorescence excitation–emission matrix (EEM) ; Humification ; Principle component analysis (PCA)
• 刊名：Environmental Science and Pollution Research
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：23
• 期：6
• 页码：5203-5213
• 全文大小：1,071 KB
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• 作者单位：Eun-Ah Kim (1) (3)
  Hang Vo-Minh Nguyen (1)
  Hae Sung Oh (1)
  Jin Hur (2)
  Jung Hyun Choi (1)
  
  1. Department of Environmental Science and Engineering, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul, 120-750, South Korea
  3. Center for Chemical Safety and Security, 141 Gajeongro, Yuseong, Daejeon, 34114, South Korea
  2. Department of Environment and Energy, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul, 143-747, South Korea
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Industrial Pollution Prevention
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7499

文摘

This study investigated the effects of various soil conditions, including drying-rewetting, nitrogen deposition, and temperature rise, on the quantities and the composition of dissolved organic matter leached from forest and wetland soils. A set of forest and wetland soils with and without the nitrogen deposition were incubated in the growth chambers under three different temperatures. The moisture contents were kept constant, except for two-week drying intervals. Comparisons between the original and the treated samples revealed that drying-rewetting was a crucial environmental factor driving changes in the amount of dissolved organic carbon (DOC). The DOC was also notably increased by the nitrogen deposition to the dry forest soil and was affected by the temperature of the dry wetland soil. A parallel factor (PARAFAC) analysis identified three sub-fractions of the fluorescent dissolved organic matter (FDOM) from the fluorescence excitation–emission matrices (EEMs), and their compositions depended on drying-rewetting. The data as a whole, including the DOC and PARAFAC components and other optical indices, were possibly explained by the two main variables, which were closely related with the PARAFAC components and DOC based on principal component analysis (PCA). Our results suggested that the DOC and PARAFAC component information could provide a comprehensive interpretation of the changes in the soil-leached DOM in response to the different environmental conditions.