Pollution Research Paper

Vol. 35, Issue 2, 2016; Page No.(353-361 )

SEASONAL VARIATIONS IN PHYSICAL, CHEMICAL AND BIOLOGICAL CHARACTERISTICS OF A FEW CANAL SYSTEMS OF EAST KOLKATA WETLANDS

ARINDAM DATTA, MOUMITA MAITY AND RAJARSHI BANERJEE

Abstract

Present work is related to the physico-chemical parameters of water quality analysis and microbial analysis of canal water in East Kolkata. Three different points of canal were studied during the present work for a period of one year and results are presented seasonally. The parameters are temperature, pH, D.O, B.O.D.5, C.O.D, total alkalinity, PO4, NO3-N, lead, cadmium and chromium. From microbiological analysis a number of pathogenic bacteria have been identified and their count and type varies with nature of water. Water temperature varied from 21ºC to 37ºC, pH from 6.5 to 7.5, D.O from 0 to 1.8mg/L, B.O.D.5 from 88 to 560 mg/L, C.O.D from 562.25 to 1146.12mg/L, phosphate 1.9 to 11.6 mg/L, NO3-N from 15.3 to 41.80 mg/L, total alkalinity from 185 to 268 mg/L, lead from 0.32 to 0.62 mg/L, cadmium from 0.08 to 0.22 mg/L and chromium from 0.01 to 0.4 mg/ L. The results indicate that water is very highly polluted and has a high possibility of heavy metal concentration like lead. Microbial analysis showed high bacterial load which may have a high potentiality of spreading disease like dysentery, cholera etc.

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