From a study of rice husk charcoal kamman urged using fosof acid 30% concentration kokwam foe burn 700° C temperature stimuli and absorb various concentrations that lead is 5 ppm, 10 ppm, and 15 ppm, respectively. Then, compare the effectiveness of lead uptake of rice husk charcoal kamman. Kamman charcoal and commercial use in laboratories That works as follows:
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