Saraswati, Dian Hana and Harumi, Mellia and Triyono, Triyono and Sudiono, Sri (2019) The Effectiveness Adsorption of Au(III) and Cu(II) Ion by Mangosteen Rind (Garcinia mangostana L.) Using Point of Zero Charge Calculation. The Effectiveness Adsorption of Au(III) and Cu(II) Ion by Mangosteen Rind (Garcinia mangostana L.) Using Point of Zero Charge Calculation, 840. pp. 10-15. ISSN 1662-9795
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Abstract
Adsorption of Au(III) and Cu(II) by mangosteen rind adsorbent had been carried out. Mangosteen rind has several functional groups including –OH phenolics, ‒C=C‒ aromatics, and ethers. Dried mangosteen rind which was obtained from maceration was used to determine Point of Zero Charge (PZC). The most effective pH adsorption was determined by mixing adsorbent with Au(III) or Cu(II) solutions with various pH. The adsorption capacity was affected by the interaction between adsorbent and adsorbate. The solid adsorbent before and after interaction was characterized by FTIR, XRD, and microphotography. The PZC pH value of adsorbent was 3.7 while the optimum pH for Au(III) and Cu(II) were at pH 2 and pH 5, respectively. The adsorption capacity (qmax) value was 333.33 mg/g by following the Langmuir isotherm equation. The crystalline structure of adsorbent was analyzed using XRD and gave 4 peaks characteristics of gold metal on 2ϴ = 38º, 44º, 64º, and 77º after adsorption which indicated the reduction of Au(III) ions into Au(0).
| Item Type: | Article |
|---|---|
| Subjects: | 500 Science > 540 Chemistry 500 Science > 570 Life sciences, biology 500 Science > 570 Life sciences, biology > 572 Biochemistry |
| Divisions: | Faculty of Agricultural Technology |
| Depositing User: | Ms Mellia Harumi |
| Date Deposited: | 01 Apr 2020 03:11 |
| Last Modified: | 01 Apr 2020 03:16 |
| URI: | http://repository.unika.ac.id/id/eprint/21221 |
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