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Table 2

Summary of the analysis of variance (ANOVA) for tests involving adsorbent mass and pH of Cd2+ solution

Sources of variationDegrees of freedomAverage squares
E. in naturaE. H2O2E. H2SO4E. NaOH
Mass (L) 0.658324a 1.059795a 0.563293a 1.886175a 
Mass (Q) 0.171143a 0.201129a 0.140963a 0.409658a 
pH (L) 0.002291ns 0.010476ns 0.078108b 0.000035ns 
pH (Q) 0.00338ns 0.002326ns 0.030001ns 0.001817ns 
Mass × pH 0.002113ns 0.002002ns 0.01655ns 0.00001ns 
Residue 0.00498 0.002645 0.006695 0.010799 
Total 11     
Sources of variationDegrees of freedomAverage squares
E. in naturaE. H2O2E. H2SO4E. NaOH
Mass (L) 0.658324a 1.059795a 0.563293a 1.886175a 
Mass (Q) 0.171143a 0.201129a 0.140963a 0.409658a 
pH (L) 0.002291ns 0.010476ns 0.078108b 0.000035ns 
pH (Q) 0.00338ns 0.002326ns 0.030001ns 0.001817ns 
Mass × pH 0.002113ns 0.002002ns 0.01655ns 0.00001ns 
Residue 0.00498 0.002645 0.006695 0.010799 
Total 11     

ns, not significant.

aSignificant at 1%.

bSignificant at 5%.

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