Studi Kinetika Adsorpsi Ion Au(III) Menggunakan Kulit Buah Manggis (Garcinia mangostana L.)

Abstract

Adsorption using biosorbent become an alternatif for recovery heavy metals such as gold from electronic waste. Mangosteen rind can adsorp Au(III) ions in acid condition pH 2 optimally. Kinetics study of Au(III) ions adsorption using mangosteen rind was aim to determine adsorption kinetics model, adsorption rate constanta (k) and activation energy (Ea) Au(III) ions using mangosteen rind. Adsorbent. Adsorbent preparation was carried out using maceration methof for activate adsorption functional group and remove contaminant materials. Au(III) ions adsorption was analyzed by varying temperature and time. Adsorbed Au(III) was determined using Atomic Adsorption Spectroscopy (AAS) and characterized using Fourier Transform Infra Red (FTIR) Spectroscopy dan X-Ray Diffraction (XRD) Spectroscopy. The result proved that KBM adsorbent could adsorp Au(III) ions effectivelly and follow Ho pseudo-second order kinetic with Ea of 24,65 kJ/mol and k of 2.05x10-3 (40); 3.63x10-3 (50) dan 3.60x10-3 (60) g mg-1 minutet-1 respectivelly.

The potential of mangosteen peel as a biosorbent: A review

“…Afterward, carbonization was carried out inside a 450 C furnace tube for 2 h. The sample showed a maximum adsorption capacity of 36.12 and 36.98 mg/g for metal ions Cr(VI) and Pb(II), respectively. The maceration method can also be carried out as physical modification, which has been done by Harumi et al, 15 by soaking the milled mangosteen peels in 100 mL aquadest for 24 h and drying the sample afterward in the oven for another 24 h. The experiment was conducted in various temperatures, resulting in 67.11, 74.64, and 80.64 mg/g maximum adsorption capacity for Au(III) at temperatures 40, 50, and 60 C, respectively. Mangosteen peel itself is mainly composed of cellulose, lignin, and hemicellulose, which is a lignocellulose-based material, which is good for activated carbon material.…”

“…F I G U R E 1 A schematic process of mangosteen peel activated carbon preparation. 15 T A B L E 1 Previous studies on utilization of mangosteen peel biosorbent for metal ion pollutants.…”