Sintesis Karbon Aktif Kulit Durian Serta Penyerapannya Terhadap Logam Berat Pb(II) dengan Metode Batch

Abstract

Activated carbon from durian peel is synthesized by chemical activation using an alkaline sodium hydroxide. The carbonization process is carried out for 2 hours at a temperature of 320ºC. Activated carbon is characterized by conducting several quality tests based on SNI 06-3730-1995 which has met all specified standards. The results of the FTIR spectrum show that activated carbon has a cluster of -OH at wave numbers 3000-3400 cm^-1, C = C at wave numbers 1540-1630 cm^-1, C-O in wave numbers 1150-1275 cm^-1. Adsorption test results by batch method showed that the prepared activated carbon was able to absorb Pb²⁺ ions at an optimum concentration of 280 mg/L and an optimum contact time of 150 minutes with an absorption capacity of 34,145 mg/g that was close to langmuir's isoterm equation by producing a regression coefficient value of R² = 0.999.