Monitoring of Soil Environment Under Influence of Coal Bed Water

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• 作者：Utpal Majee ; G. N. Chattopadhyay ; Shibani Chaudhury
• 关键词：Coal bed methane ; Coal bed water ; Soil contamination ; Soil environment ; Quality assessment
• 刊名：Water, Air, and Soil Pollution
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：226
• 期：8
• 全文大小：906 KB
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• 作者单位：Utpal Majee (1)
  G. N. Chattopadhyay (2)
  Shibani Chaudhury (1)
  
  1. Department of Environmental Studies, Visva-Bharati University, Santiniketan, 731235, West Bengal, India
  2. Ashirbad, Seba Pally, Santiniketan, 731235, West Bengal, India
  
• 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
  Terrestrial Pollution
  Hydrogeology
  
• 出版者：Springer Netherlands
• ISSN：1573-2932

文摘

During the extraction of coal bed methane (CBM), entrapped in the deep layers of different coal beds, large amount of coal bed water (CBW) is also simultaneously released. The quality of this water is generally very poor which may often contaminate the adjoining soil environment adversely. In the present study, some major changes occurring in CBW-contaminated soils were assessed with relation to nearby non-affected soils. The CBW was found to be moderately saline and highly alkaline in nature with high sodium absorption ratio (SAR) values. Contamination with this water affected the soil environments substantially resulting in significantly increased pH and exchangeable sodium percentage (ESP) in the affected soils thus rendering the soils unsuitable for undertaking common agricultural practices. However, in spite of moderately high electrical conductivity values of this contaminating water, the resultant increments in salinity status of the soils were not observed to reach near the critical level. This behaviour was attributed to light texture of these soils which probably helped in leaching of a part of the soluble salts. Some microbial properties as well as availability of nitrogen and phosphorus were also found to decline in these CBW-affected soils. The study showed that utmost care needs to be exercised before release of CBW during extraction of CBM. In case of any contamination to nearby arable soils, suitable amendment practices for alkaline soils need to be adopted to mitigate the adverse effects of such water on soil environment.