Harumi, Mellia and Saraswati, Dian Hana and Triyono, Triyono and Sudiono, Sri (2019) Isotherm and Thermodynamics Adsorption of Au(III) Ion by Mangosteen Rind (Garcinia mangostana L.). Isotherm and Thermodynamics Adsorption of Au(III) Ion by Mangosteen Rind (Garcinia mangostana L.), 840. pp. 16-21. ISSN 1662-9795
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Abstract
The mangosteen rind has O‒H, C=C aromatics, and ethers functional groups, its performance for Au adsorption become an interesting research to both environment and economic purpose. In this study, waste mangosteen rind as eco-friendly adsorbent had been used for Au(III) adsorption. Initiate by maceration for pre-treatment of biosorbent, the mangosteen rind’s perfomance was revealed. Crystalline structure of mangosteen rind was analyzed by X-ray diffraction, while after interaction with Au(III) ions gave three characteristic peaks indicated Au(III) reduction into Au(0). The adsorption followed isotherm Langmuir model and afforded spontaneous reaction that evidenced by enhancement of ∆G by increasing of temperature (–1.7 at 30 C to –8.4 at 60 C). The value of ∆H and ∆S were 71.1 kJ mol–1 and 238.5 J mol–1 K–1 , respectively.
| Item Type: | Article |
|---|---|
| Subjects: | 500 Science > 540 Chemistry 500 Science > 570 Life sciences, biology > 572 Biochemistry 500 Science > 570 Life sciences, biology > 577 Ecology |
| Divisions: | Faculty of Agricultural Technology |
| Depositing User: | Ms Mellia Harumi |
| Date Deposited: | 09 Apr 2020 10:01 |
| Last Modified: | 09 Apr 2020 10:01 |
| URI: | http://repository.unika.ac.id/id/eprint/21222 |
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