POTENSI BUBUK BIJI ALPUKAT (Persea americana Mill) SEBAGAI ADSORBEN ION KADMIUM (II) DAN TIMBAL (II) DENGAN AKTIVATOR H2SO4

Abstract

Avocado seeds was investigated as adsorbent in powder form and activated with variation of sulfuric acid concentration 2.5, 5.0 and 7.5%. The characterization result showed that activation of avocado seeds powder with sulfuric acid concentration 7.5% have characteristic 13.82% of moisture contain, 0.06% of ash content, 530.6693 mg/g of iodine adsorption and 87.5253 m2/g of surface area. Avocado seeds powder were contacted in variation of concentration cadmium and lead solution for 24 hours and analyzed with Atomic Absorption of Spectrophotometer with efficiency of adsorption were 85.78% and 93.88% respectively. The presence of functional groups like carbonyl in avocado seed have important role for the adsorption process and confirmed by FTIR Spectroscopy