Abstract
A study about the effect of biosorbent particle size on adsorption Pb ions from seeds and shell lengkeng ( Euphoria longan lour) has been conducted. Shell and seeds lengkeng were activated with HNO 3 and characterized by FTIR to analyze the mayor functional groups in biosorbent. The effect of seed and shell lengkeng ( Euphoria longan lour) on the adsorption capacity of Pb (II) metal ions was carried out with variation 106 μm, 150 μm, 250 μm, and 300 μm. The results obtained from the particle size 106 μm of seed and shell lengkeng have a greater adsorpsition of 25,626 mg/g dan 30,095 mg/g respectively. This study shows that the biosorbent particle size afffects the amount of adsorption of metal ions.
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