Sr No Metal ion Salvinia Eichhornia Hydrilla Water Water Treated with Micro-organisms 1 Ca 2.051(0.003) 1.972(0.005) 1.176(0.003) 2.632(0.003) 1.203(0.004) 2 Mg 2.218(0.096) 1.173(0.005) 0.482(0.003) 2.725(0.002) 2.917(0.007) 3 Cr 0.189(0.005) 0.205(0.015) 0.067(0.012) 0.067(0.002) 0.004(0.00) 4 Mn 0.248(0.007) 1.02(0.005) 0.088(0.000) 0.122(0.001) 0.150(0.002) 5 Fe 0.966(0.006) 1.453(0.031) 0.466(0.008) 0.362(0.005) 0.168(0.005) 6 Co 0.065(0.001) 0.042(0.001) 0.043(0.003) 0.052(0.003) 0.000(0.001) 7 Cu 0.828(0.029) 1.655(0.012) 0.743(0.017) 2.179(0.020) 1.230(0.013) 8 Ni 0.211(0.003) 0.183(0.002) 0.109(0.012) 0.064(0.002) 0.000(0.001) 9 Zn 0.601(0.008) 0.744(0.004) 0.372(0.000) 0.133(0.001) 0.040(0.003) 10 Pb 0.434(0.001) 0.064(0.004) 0.061(0.004) 0.061(0.017) 0.000(0.000) 11 Cd 0.086(0.001) 0.003(0.001) 0.000(0.000) 0.005(0.000) 0.000(0.001) Values in parenthesis indicate standard deviation

Table 3: Metal Analysis in Salvinia, Eichhornia, Hydrilla and water sample collected from Rankala Lake by Atomic Absorption Spectrometer (Perkin Elmer; AAnalyst 300 [concentration of metals in ppm].