Analysis of Platinum (Pt) Ion Biosorption Performance Using Chitosan

¹ Department of Metallurgical Technology, Bandung Polytechnic of Energy and Mining, Indonesia 40211
² Department of Materials and Metallurgical Engineering, Faculty of Industrial Technology and System Engineering, Sepuluh Nopember Institute of Technology (ITS), Indonesia 60111.

^* Corresponding author: Fahny.Ardian@esdm.go.id

Abstract

Platinum Group Metal has a continuous increase in demand. The demand for platinum is divided into four segments: automotive, jewelry, industry, and investment. However, the availability of PGM is limited, resulting in the potential scarcity of the metal and the necessity for developing more effective and environmentally friendly methods. Biosorption serves as an alternative method for capturing metal ions using biological materials. Biosorption is chosen due to its low operational costs, environmentally friendly, and utilization of abundant natural biomaterials. This study aims to analyze the influence of chitosan concentration and adsorbent surface area on the biosorption process of Pt metal from H₂PtCl₆ solution. The biosorption method utilizes chitosan membranes produced by mixing chitosan with PVA and using glutaraldehyde as a crosslinker to stabilize chitosan in solution. The research involves testing using UV-VIS, SEM-EDX, and FTIR techniques to analyze the concentration of adsorbed Pt metal, morphology, and functional groups on the membrane. The results indicate that chitosan is an effective adsorbent for absorbing Pt metal ions, particularly in the CS/PVA adsorbent with a surface area of 352 mm² and a chitosan concentration ratio of 2 gram, resulting in percentage adsorption of 47.948%.