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Several electroplating industry including agricultural sector industries, sewage treatment and mining operations all combine to generate hazardous waste water containing enormous amounts of toxic heavy metals. The accumulation of toxic heavy metals in human beings and animals cause many metabolic disorders. Heavy metal concentration was estimated in sewage, sludge and electroplating wastewater collected from Karnal, Panipat, and Sonepat districts of Haryana. Heavy metals were estimated by Atomic Absorption Spectrophotometer. The results showed that Cd, Cr, Pb and Ni were found in the industrial effluent, sludge, and sewage samples of Karnal, Panipat and Sonepat. The soluble heavy metals ranged from: Cd (0.015 - 0.451 mg/L), Cr (0.015 - 0.248 mg/L), Pb (0.014 - 0.351 mg/L) and Ni (0.023 - 0.624 mg/L). Similarly total heavy metals ranged from: Cd (0.2 - 6.5 mg/ L), Cr (0.1- 180 mg/L), Pb (0.1 - 180 mg/L) and Ni (0.3 - 125 mg/L).

A study of heavy metals in sludge, sewage and industrial waste water of different districts of Haryana