Aktivasi Deoiled Spent Bleaching Earth (DSBE) dengan Menggunakan Metode Ultrasonik untuk Mengadsorpsi Ion Logam Pb2+

Abstract

Spent bleaching earth (SBE) as adsorbent of Pb²⁺ ion, through oil extraction process and continued by acid activation has been studied, this process assisted by ultrasonic wave in 30, 60 and 90 minutes reaction time. Based on the results analysis of X-Ray Flourescence (XRF), the reaction time of  30, 60 and 90 minutes showed an increase of SiO₂ were 37.802 %, 42.374 % and 38,793 %. From the surface area with method methylene blue adsorption showed the surface area of DSBE-A 30, 60 and 90 were 34.3057 m²/g, 36.3375 m²/g and 35.8893 m²/g, respectively. XRD analysis showed the type of DSBE-A 60 was rectorite mineral with chemical compound was Na.Al₄(Si,Al)₈.O₂₀.(OH)₄.H₂O and has a crystallinity 53.93%. Optimum conditions of DBSE-A 60 to adsorb Pb²⁺ ion in contact time was at 80 minutes, pH 3 and 20 ppm of Pb²⁺ ion concentration with adsorbtion efficiency up to 46.04 % and the optimum capacity of DSBE-A 60 to adsorb Pb²⁺ ion was 0.9209 mg/g.