Elements/Factors Cd2+ Pb2+
X pH BD    
-1 -1 -1 75.6 71.24 73.42 85.7 90.8 88.25
-1 -1 1 88.42 87.99 88.2 86.09 88.69 87.39
-1 1 -1 84.65 86.01 85.33 76.7 78 77.35
-1 1 1 87.96 89.23 88.59 82.66 81.57 82.12
1 -1 -1 15.82 14.14 14.98 55.64 59.11 57.38
1 -1 1 77.9 74.27 76.08 92.8 94.34 93.57
1 1 -1 61.16 64.04 62.6 82 80.9 81.45
1 1 1 79.67 79.84 79.75 83.4 83.5 83.45
Table 2: Experimental factorial design results for Cd2+ and Pb2+ biosorption.