Volume No. 10 Issue No.: 3 Page No.: 436-444 Jan-Mar 2016

 

IMPACT OF COAL MINING ON WATER QUALITY IN MANGKOLEMBA REGION UNDER MOKOKCHUNG DISTRICT NAGALAND, INDIA

 

Jamir Tiakaba. T

Department of Chemistry, Kohima Science College (Autonomous), Jotsoma, Nagaland (INDIA)

 

Received on : October 09, 2015

 

ABSTRACT

 

Coal is one of the most exploited minerals in the region. The usual method for coal extraction is predominantly rat-hole mining while open cast mining is employed to a lesser extent. Most of the mining activities are small scale ventures controlled by individuals, private parties or landowners. Coal mining undoubtedly generated wealth and employment opportunity in the area but simultaneously has led to environmental degradation. The water bodies are the greatest victims of the coal mining. The variations of physicochemical parameters of rivers and stream in the area were studied. Samples were collected from six main affected water sources. The collected samples were then analyzed viz, temperature, pH, Electric Conductivity (EC), Total Dissolved Solids (TDS), Dissolved Oxygen (DO), Salinity, ORP, sulphate, total hardness, calcium hardness. Contaminations of Acid Mine Drainage (AMD) originated from mining activities are the major causes of degradation of water quality in the area. Low pH, high electrical conductivity, high TDS, high concentration of sulphate, Low Dissolved Oxygen (DO) are some of the physicochemical parameters which characterize the degradation of water quality.

 

Keywords : Coal mining, Water quality, Physicochemical parameters, Acid Mine Drainage, Contamination, WHO

 

 

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