Study on Water pollution of Vairab River from Nowapara, Jessore to Labon Chara, Khulna

Abstract

only Vairab river is the vital source of water in Nowapara, Jessore to Khulna and is being polluted increasingly by effluents discharged from industries, municipal sewage, household wastes, linical wastes and oils. The purpose of this study is to investigate the impact of this wastewater on the river and thus to provide an updated report on the state of water quality of river Vairab. The water sample were collected from different areas in the river Vairab and analyzed for physico-chernical parameters and fresh water elements in the month of July, 2013 to November, 2013. The values of Temperature, turbidity, pH, chloride, hardness, DO, BUD, COD, Fe, As, Pb. Cd and Measured. During study period the temperature. turbidity,pH, hardness, chloride, DO, BUD and COD were found to be 28 Cr in the river °C to 31.5°C. 37 to 947 NTU, 7.2 to 8.01, 92 to 140 ppm, 9 to 34 ppm, 122 to 5.51 mg/L, 0.22 to 5.79 and 3.80 to 10.80 mg/L respectively. The concentration of Fe, Pb, As, Cd and Cr were found to be 0.10 to 2.60 ppm, 0.004 to 0.025 ppm, 0.001 to 0.004 ppm, 0.00015 to 0.0094 ppm and 0.001 to 0.006 ppm respectively. From the results of investigation, it was observed that the values of pH, Cl, hardness, As, Pb, Cd and Cr were within standard limit but the values of temperature, turbidity, DO, BUD, COD and Fe were not within acceptable limit as recommended by WHO and BDS guidelines. The results obtained from this investigation will help the people of the research area to be conscious for using the water in the Vairab river.