Synthesis and Application of Positively Charged and Magnetically Separable Magnetite/Silica-Ammonium as an Effective Platinum(IV) Adsorbent

Ngatijo, Ngatijo and Marlinda, Lenny and Heriyanti, Heriyanti and Gusti, Diah Riski and Lazuardi, Ahmad Fatwa and Ishartono, Bayu and Basuki, Rahmat (2023) Synthesis and Application of Positively Charged and Magnetically Separable Magnetite/Silica-Ammonium as an Effective Platinum(IV) Adsorbent. Materials Science Forum, 1069. pp. 37-45. ISSN 1662-9752

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Abstract

Abstract. Platinum is a valuable metal that is widely used in industry, electronics, and catalysts. The use of platinum has a significant impact on the production of waste, necessitating effective metal recovery. This study investigated platinum(IV) recovery from wastewater using a positively charged and magnetically separable Magnetite/Silica-Ammonium (MSA). The MSA was prepared by co-precipitation procedure of silica-decorated quaternary ammonium in the Fe3+/Fe2+ solution. The characterization result of the MSA by FT-IR, X-ray diffraction (XRD), SEM-EDX, and Vibration Sample Magnetometer (VSM) demonstrated the success of MSA synthesis. The application of MSA to the Pt(IV) solution occurred at pH optimum 6.0 with the easy and quick retraction of MSA-loaded Pt(IV) by 29.3 emu/g magnetic strength of an external magnet. The adsorption isotherm study followed the Freundlich model (R2 =0.9895) with the KF=2.57×10-2 mol/g. The monolayer capacity by Langmuir showed the remarkable performance of 139.09 mg/g adsorption capacity through the ion exchange interaction mechanism based on the Dubinin�Radushkevich energy (ED-R=8,3 kJ/mol). The kinetics study was fitted well to the Pseudo-second�order model indicated the fast adsorption of Pt(IV) into the MSA surface.

Type:	Article
Subjects:	Q Science > QD Chemistry
Divisions:	Fakultas Sains dan Teknologi > Kimia
Depositing User:	Gusti
Date Deposited:	04 May 2023 04:39
Last Modified:	04 May 2023 04:39
URI:	https://repository.unja.ac.id/id/eprint/47805

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