Evaluation of the Adsorption and Reduction of Au(III) on Esterified Humic Acid
- DOI
- 10.2991/adics-phs-19.2019.5How to use a DOI?
- Keywords
- adsorption, reduction, Au (III), humic acid, esterification
- Abstract
Electronic waste is increasing every year, one of which is electronic waste metal. Gold mining is less profitable than taking gold from electronics. One of the adsorbents that can be used is humic acid. To study the effect of functional groups on the adsorption of Au (III) ions, the adsorption-reduction of Au (III) ions using esterified humic acid was studied. Humic acid that will be esterified is isolated from peat soil from Rawa Pening, Central Java. Esterification was performed by reaction with ethanol in acidic conditions and doing repeated. Estesterified humic acid was characterized by Fourier-Transform Infrared spectroscopy (FTIR), X-Ray Diffraction (XRD), ash content, total acidity, -COOH content, and -OH content, then used for adsorption-reduction of Au (III). Esterified humic acid has studied the effect of pH adsorption, adsorption kinetics, and adsorption isotherm on adsorption reduction process of Au (III). The Au metal formed was confirmed by XRD diffractogram and photo-optical microscope. Esterified humic acid has 0.78% ash content, total acidity of 1022 cmol/kg, COOH content of 217 cmol/kg, and -OH content of 805 cmol/kg. pH optimum on adsorption reduction Au(III) using esterified humic acid was 6. The adsorption capacity is 625 mg/g with Langmuir isotherm model esterified humic acid. The adsorption rate constant (k) is 1.50.10-3 g/mg min with Ho kinetic model for esterified humic acid. Peaks of gold particles in the diffractogram are detected on 2θ = 38, 44, and 64
- Copyright
- © 2019, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Dian Prasasti AU - Sri Juari Santosa AU - Sri Sudiono PY - 2019/11 DA - 2019/11 TI - Evaluation of the Adsorption and Reduction of Au(III) on Esterified Humic Acid BT - Proceedings of the 2019 Ahmad Dahlan International Conference Series on Pharmacy and Health Science (ADICS-PHS 2019) PB - Atlantis Press SP - 118 EP - 125 SN - 2468-5739 UR - https://doi.org/10.2991/adics-phs-19.2019.5 DO - 10.2991/adics-phs-19.2019.5 ID - Prasasti2019/11 ER -