The charcoal does not stimulate efficiency in absorbing metals have higher carbon that is triggered by acid with standard deviation increased to 15.52 and 32 for Pb and Cd uptake, respectively.
Charcoal is not motivated to show the efficiency of adsorption is higher than coal were stimulated with acid, with the standard deviation increased to 15.52 and 32 for the adsorption Pb and Cd, respectively.
Charcoal does not stimulate the performance of adsorption than charcoal activated by acid with standard deviation and rose to 15.52 32 for adsorption and Pb Cd. Respectively.