Sintesis Selulosa Termodifikasi Polietilenimina (PEI) Tertaut Silang Glutaraldehid Sebagai Adsorben Zat Warna Alizarin Red S
KANIA SANDRINA DEWINTA, Dr. Sri Sudiono, S.Si., M.Si.; Prof. Dr. Triyono, S.U.
2024 | Skripsi | KIMIA
Research on the synthesize of cellulose modified polyethylenimine (PEI) cross-linked by glutaraldehyde as an adsorbent of alizarin red s dye was carried out. The aims of this analysis were to synthesize the cellulose-bagasse modified with polyethylenimine (PEI) cross-linked by glutaraldehyde as an adsorbent and to determine the optimum pH of alizarin red s adsorption, determine the adsorption isotherm and kinetic model of alizarin red s using cellulose-glutaraldehyde-polyethylenimine (SEL-GAL-PEI) adsorbent. Cellulose-based adsorbent was prepared through the isolation process from bagasse using hydrolysis, delignification, and bleaching processes.
SEL-GAL-PEI adsorbent was made by synthesizing cellulose from bagasse and modified with polyethylenimine (PEI) and cross-linked using glutaraldehyde. The results of the synthesize were characterized using FT-IR, XRD, and SEM-EDX spectrophotometers. The results showed that the SEL-GAL-PEI adsorbent was stable in all pH variation. Adsorption of alizarin red s using SEL-GAL-PEI adsorbent was carried out at an optimum pH 2 while the optimum contact time for adsorption occurs at 40 minutes. Adsorption of alizarin red s using SEL-GAL-PEI adsorbent showed that followed the Langmuir isotherm model (qmax = 30.34 mg g-1) and the pseudo-second-order kinetics model (k = 2.29 × 10-2 g mg-1 min-1). The desorption test declare that a 0.1 M NaOH solution was the most effective solution for desorption of alizarin red s dye.
Kata Kunci : adsorpsi, alizarin red s, glutaraldehid, polietilenimina