With kamman charcoal produced from type route, there are 6 different stimulation types and compare the efficiency of lead and cadmium adsorption solution of commercial coal-fired kamman and kamman.
By type of activated carbon produced from the various stimulus into 6 types and compare the performance of absorbing a solution of cadmium, lead and activated carbon commercially available activated carbon manufactured.
The type of activated carbon produced from activation process models into 6 type. And the efficiency in the adsorption of lead and cadmium of activated carbon and activated carbon production and trade.