Rina Tri Vidia Ningsih, Anugrah Ricky Wijaya, Aman Santoso, Muntholib Muntholib
This research was conducted based on the manufacture of chitosan membrane in the process of adding silica to adsorb Na+ions. The added silica comes from the natural sediments of the Prigi Bay. The content of the sediment is silica, which has Si-O-Si and Si-OH groups so that the sediment is expected to be able to absorb Na+ions. This study aims to understand the addition of silica in the chitosan membrane in the level of absorption of Na+ions. Furthermore, modification of the chitosan membrane is carried out to produce a membrane that has better characteristics. For example, it can increase the stability in the membrane, can reduce the pore size so that the separation of a solution by the membrane becomes more effective. The design of this study is to determine the sampling point, take and prepare sediment samples, XRF testing, XRD testing, SEM-EDX testing, sediment ashing, silica extraction from sediment ash, membrane making with the addition of chitosan for Na+ion adsorption, membrane characterization with FTIR, and application membrane in the Na+ ion test. The results obtained from this study are silica from marine sediments, which are white in color which has a characteristic peak of stretching vibration of the -OH group which appears at wavenumber 3200-3400 cm-1and the addition of silica can increase the performance of the membrane in the absorption rate of Na+ions. The optimization level of the membrane on the maximum adsorption power of Na+ions is 96.90 % on a laboratory scale, and Prigi seawater is 84.32%. © 2023 American Institute of Physics Inc.. All rights reserved.
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, Indonesia