The Synthesis of Glutaraldehyde-modified Chitosan Utilizing MAOS (Microwave Assisted Organic Synthesis) Method as Adsorbent Pb(II) Ions Contained in Cikapundung River Water Sample

• Main Author: - Nim: 10514021 , Herayati
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/27832
• Institution: Institut Teknologi Bandung

<p align="justify">Indonesia has a vast territory. Approximately 2/3 of Indonesia is water. Indonesia has almost 6% of the world's water resources, or about 21% of water resources in the Asia Pacific region. Indonesian waters comprise 97.4% seas and 2.6% are rivers, lakes and straits. There are 309 rivers in Indonesia and 49 of them flow in Bandung, one of them is Cikapundung river. Pb(II) ion contained in Cikapundung river has exceeded the quality standard of water river. Therefore, it is necessary to reduce the amount of Pb(II) ion from the river. One of the solutions is the usage of the application of biodegradable adsorbent, the glutaraldehyde-modified chitosan. Chitosan was obtained from deacetylation of chitin in basic condition. The chitosan was characterized using FTIR showed 85.5% degrees of deacetylation. The other characterization is determination of average molecular mass based on Ostwald viscometry method, obtained the average molecular mass of chitosan is 2.7 x 106 g/mol. Furthermore, chitosan was modified by reacting with glutaraldehyde using MAOS (Microwave Assisted Organic Synthesis) at 80 &#8451; with irradiation power of reaction 100 W for 60 minutes to form glutaraldehyde-modified chitosan with 79% degree of substitution. The synthesized glutaraldehyde-modified chitosan was characterized by FTIR, SEM, SAA and applied as adsorbent of Pb(II) ion. The results showed that the optimum condition of adsorption for 15 mL of Pb(II) solution was achieved at pH 4, 0.075 gram of adsorbent mass and 90 minutes contact time. The adsorption process of Pb(II) ion follows the Langmuir isotherm model and the pseudo-second order kinetics with percent adsorption of Pb(II) ions from the water sample of Cikapundung river is 84% (for sample from middlestream) and 50.2% (for sample from downstream). <p align="justify"> <br />