Activated Carbon from Cassava Peel as Adsorbent of Lead Metal (Pb2+) in the Water

Cassava peels contained carbon elements about 59.31%, it became the base of using cassava peels as activated carbon. One of utilization of activated carbon was adsorption metal lead. Production of activated carbon was conducted in 3 steps were dehydration, carbonation and activation. Study had been conducted by comparing characteristic of activated carbon without activator and activated carbon with variation of KOH concentration as activator were 0.2 M; 0.4 M and 0.6 M so that could be known the optimal KOH concentration. Characteristic testing was conducted for water content, ash content, adsorption of iodium and adsorption of methylene blue also adsorption of lead metal. Measuring of adsorption metal lead was done by Atomic Absorption Spectroscopy. Experiment result shows activated carbon with KOH 0.4 M has best characteristic by water content 3.79%, ash content 8.09%, adsorption of iodium 863 mg/g and adsorption of methylene blue 3116 mg/g also adsorption of metal lead 98%.Kulit singkong mengandung unsur karbon sebesar 59,31% menjadi dasar penggunaan kulit singkong sebagai karbon aktif. Salah satu pemanfaatan karbon aktif untuk adsorpsi logam Pb. Pembuatan karbon aktif dilakukan dengan 3 tahap yaitu dehidrasi, karbonasi dan aktivasi. Dilakukan perbandingan karakteristik terhadap karbon aktif yang tidak teraktivasi KOH dan teraktivasi KOH dengan variasi konsentrasi yaitu 0,2 M; 0,4 M dan 0,6 M untuk mengetahui konsentrasi optimal KOH. Pengujian karakteristik karbon aktif meliputi kadar air, kadar abu, adsorpsi iodium dan adsorpsi metilen biru serta uji adsorpsi terhadap logam Pb. Pengukuran adsorpi logam Pb dilakukan menggunakan Spektroskopi Serapan Atom. Hasil penelitian menunjukkan bahwa karbon aktif yang diaktivasi dengan KOH 0,4 M memiliki karakteristik  yang paling baik dengan hasil kadar air 3,79%, kadar abu 8,09%, adsorpsi iodium 863 mg/g dan adsorpsi metilen biru 3116 mg/g serta adsorpsi terhadap logam Pb sebesar 98%