POTENSI BUBUK BIJI ALPUKAT (Persea americana Mill) SEBAGAI ADSORBEN ION KADMIUM (II) DAN TIMBAL (II) DENGAN AKTIVATOR HCl

Abstract

In this study, the activator used to activate the avocado seed powder was HCl with variation concentration of 2.5, 5.0, and 7.5%. The result of characterization indicated that the powder avocado seed which activated by HCl 5.0% has the best result with water content, ash content, adsorption of iodine, and surface area were 12.28%, 0.02%, 823.71 mg/g, and 86.94 m2/g, respectively. The result of adsorption cadmium (II) and lead (II) ion on avocado seed powder which has been activated showed that efficiency adsorption were 89.05 and 96.81%, respectively. The result of capacity adsorption were 1.12 and 2.34 mg/g, respectively. The result of efficiency and capacity adsorption were effected by functional group of OH, CH, C=C, C–O and C–N which analyzed by Spectrofhotometer Fourier Transform Infrared (FTIR).