Quality Assessment of Different Industrial Effluents for Irrigation in Agriculture
Journal of Earth Science and Engineering
A laboratory experiment was undertaken in Soil Science Division of BRRI (Bangladesh Rice Research Institute) during 2010 to assess the quality of industrial effluents and city waste as a source of irrigation water for agriculture. The treatments of the studies were the effluents of five different industrial sources like polyvinyl, dyeing, pharmaceuticals, beverage, tannery, mixed waste water (contaminated with effluents from many industries), CWW (city waste water) and underground water as
... round water as control. The industrial effluents, MWW (mixed waste water), CWW and control water were tested for electrical conductivity, pH, and soluble ions such as Na + , Ca 2+ , Mg 2+ , K + , HCO 3 -, CO 3 2-, NH 4 + -N and H 2 PO 4 -. Micronutrients (Fe, Mn, Cu and Zn) and heavy metals (As, Pb, Cd, Cr and Ni) were analyzed from the samples. Beverage industry effluent showed acidic reaction, while the other industrial effluents showed alkaline reaction (pH 7.25-9.07). Pharmaceutical, dyeing and tannery effluents showed EC of 3.40, 4.30 and 9.49 dS m -1 , respectively, compared to 0.54 dSm -1 of the control. All the effluents except polyvinyl and beverage effluents and CWW recorded higher carbonate and bicarbonate content than that of control. Industrial effluents and CWW were higher in micronutrient content as compared to control. Dyeing, pharmaceutical and tannery effluents contained 2.51, 3.94 and 4.29 mg L -1 lead, 0.15, 0.14 and 0.38 mg L -1 chromium and 0.25, 0.24 and 0.16 mg L -1 nickel, respectively which might be concerned for health hazard through food chain.