Article Per Year (5 Year)
p-Index From 2021 - 2026
0.23
P-Index
This Author published in this journals
All Journal ALCHEMY Jurnal Penelitian Kimia
Diana Triyanti
Sultan Ageng Tirtayasa University
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Materials Science & Nanotechnology

Published : 1 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 1 Documents
Search

 1 
Synthesis and Characterization of Carrageenan-Chitosan Milkfish Scales-Based Hydrogel for Slow-Release Fertilizer Asri Azizah; Diana Triyanti; Putri Sahira; Anisa Putri; Retno Sulistyo Dhamar Lestari; Jayanudin Jayanudin
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.102933.157-169

Abstract

This study aims to develop a superabsorbent hydrogel as a slow-release fertilizer based on a combination of carrageenan-glucomannan and carrageenan-chitosan derived from milkfish (Chanos chanos) scale waste. The hydrogel was synthesized by chemical crosslinking with glutaraldehyde concentrations of 2%, 4%, 6%, and 8%. Hydrogel characterization included swelling ratio tests, gel fraction analysis, Fourier Transform Infrared (FTIR), Scanning Electron Microscopy (SEM), urea absorption (Xo), and urea release kinetics in both aqueous and soil media. The results indicate that a 8% glutaraldehyde concentration yielded optimal performance in both hydrogel systems, achieving the highest gel fractions (>90%) and maximum urea absorption capacities of 8.05 g/g for carrageenan-glucomannan and 13.31 g/g for carrageenan-chitosan. The carrageenan-glucomannan hydrogel exhibited a higher swelling ratio of 630% at 2% glutaraldehyde concentration and slower urea release in soil, ranging from 0.192% to 4.113% over 7 days. In contrast, the carrageenan-chitosan hydrogel demonstrated stronger chemical affinity for urea but released it more rapidly, ranging from 1.037% to 7.092% over the same period. SEM and FTIR analyses confirmed the formation of a three-dimensional network structure and chemical interactions among the components.
Co-Authors Anisa Putri Asri Azizah Jayanudin Jayanudin Putri Sahira Retno Sulistyo Dhamar Lestari