Parameters studied Concentration 0th day 5th day 10th day 15th day 20th day 25th day Control   Sample pH 7.3 7.3 7.9 8.3 8.5 8.7 9 Calcium mg/l 108 108 101 97.3 90 87.2 78.1 Magnesium mg/l 78 78 73 65 61 57 50 Sulphate mg/l 256 256 223 185 157.1 132.2 89 COD mg/l 459.3 459.3 302.1 246.3 224.2 198.2 172.6 BOD mg/l 104 104 96.2 85 64 48.1 21.5 Nickel mg/l 8.4 8.4 7 6.4 5.4 3.1 2 Zinc mg/l 12.1 12.1 100 8.4 7.6 5.4 3.3 Decolourization 1.83 1.83 - - - - 0.75

Table 4: Variability in physico-chemical properties of textile industry effluent during phycoremediation by Lyngbya majuscule.