Parameters studied Nostocmuscorum [(C0-C25)]/C0]×100 Anabaena variabilis [(C0-C25)]/C0]×100 Lyngbyamajuscula[(C0-25)]/C0]×100 Oscillotoriasalina [(C0-C25)]/C0]×100 pH 34.2 32 23.2 20 Calcium mg/l 40 17.5 28 44 Magnesiummg/l 43.4 28 36 51.2 Sulphate mg/l 57.4 55.4 65.2 70.3 COD mg/l 55.5 75.0 62.4 66.4 BOD mg/l 73 83.2 79.3 86 Nickel mg/l 74 63 76.1 76.1 Zinc mg/l 57 67 73 73.5

Table 6: Bioremediation efficiency of Nostoc muscorum, Anabaena variabilis, Lyngbya majuscule and Oscillotoria salina.