Water Quality Assessment: Part V - Five Stations of River Damodar and one Station of River Nalkari of South Karanpura Coalfield

摘要

Studies on physico-chemical parameters of underground mine water, OCP direct discharge water and sump water of Urimari, Sayal 'D' Block, Khas Karanpura area and Bhurkunda area of South Karanpura Coalfield of Central Coalfields Limited, a subsidiary of Coal India Limited were carried out in 2004-05 and 2005-06 in all the three seasons, namely summer, monsoon and winter. On analysis of the data it was found that the colour of the water samples were turbid, pH of these waters were slight alkaline ranging from 7. ii to 8.30, total dissolved solids varied between 29 and 262 mg/L, total suspended solids ranged between 20 and 1075 mg/L for river Damodar while for Nalkari river it was from 1480 to 3208 mg/L, dissolved oxygen is within the range 4.82 to 8.50 mg/L, biological oxygen demand of these water samples is in the order 4 to 14.5 mg/L, chemical ratio of all the three water samples are beyond 3 making the water unsafe for human consumption and hence pretreatment is essential to make it potable water. The nitrate ion concentration is from 0.26 to 4.25 mg/L. The hardness varied from 17.1 to 222 mg/L as calcium carbonate. The ions present are chloride, fluoride, sulphate, calcium and magnesium for which analyses were done. Oil and grease were also found to be present as usual. Metal analysis of water samples of both the rivers were also done with respect to Fe, Zn, Mn, As , Cd, Cr, Rb, Se, Hg, Cu, Ni, Na and K.