Pemanfaatan Sekam Padi sebagai Adsorben Logam Timbal dalam Kerang darah

Abstract

Water pollution by lead affects one of potential food, such as blood cockles. The aim of this research is to compare rice husk and rice husk charcoalinreducinglead concentration in the blood cockles. The rice husk and rice husk charcoalwere activated by NaOH 1 M, then theiradsorption toward lead solution and lead in blood cockles were determined.The result showed that the maximum capacity of the activated rice husk and rice husk charcoal were29 mg/g and 52 mg/g,respectively,at optimum condition of adsorption. The optimumadsorption condition in 100 mL Pb solution by the activatedrice husk was 0.32 g, pH 5, and 4 hours, whileby theactivatedrice husk charcoalwas 0.20 g, pH 5, and 2 hours. Lead content in blood cockles was 2 mg/kg, which washigher thanthe threshold. Lead adsorption bythe activatedrice husk reduced lead concentration in blood cockles of 40% better than the activatedrice husk charcoal, which was 32%.