Article Per Year (5 Year)
p-Index From 2021 - 2026
0.444
P-Index
This Author published in this journals
All Journal Jurnal Kartika Kimia Makara Journal of Science
Triadhi, Untung
Unknown Affiliation
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Utilization of Freeze-Dried κ-Carrageenan for Methylene Blue Adsorption Iqbal, Muhammad; Prihadi, Az Zahra Utami; Theresia, Claresta Hara; Wahyuni, Sri; Triadhi, Untung; Aryana, Nurhani; Rusnadi, Rusnadi
Jurnal Kartika Kimia Vol 8 No 2 (2025): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v8i2.992

Abstract

Methylene blue contamination in aquatic environments has become a global issue due to its widespread use in various industries. Methylene blue is a toxic, carcinogenic, and non-biodegradable dye. Adsorption can be employed as one method to mitigate this problem. The use of κ-carrageenan as an adsorbent offers an effective solution because κ-carrageenan is an abundant, easily obtainable, and economical biopolymer with promising adsorption performance. In this study, κ-carrageenan was cross-linked with K+ to form a hydrogel, which was then freeze-dried to produce a macroporous κ-carrageenan adsorbent. Characterization using FTIR confirmed the successful preparation of the adsorbent and the adsorption of methylene blue. SEM images showed changes in surface morphology, indicating successful adsorption. The adsorption process was optimum at pH 5, an adsorbent mass of 0.1 gram, and a contact time of 3 hours. Adsorption followed a pseudo-second-order kinetic model and the Langmuir isotherm model, with a maximum adsorption capacity, qmax of 128.7 mg/g at 328 K. Thermodynamic studies showed that the process was exothermic, became more disorder as a result of an increase in entropy, and occurred spontaneously. These results demonstrate that freeze-dried κ-carrageenan adsorbent has the potential for development in sustainable wastewater treatment technology.
Anthrone-based Dummy Molecularly Imprinted Polymer for the Selective Detection of Fluorene and Phenanthrene in Simulated River Water Pinandita, Aria; Handayani, Nurrahmi; Iqbal, Muhammad; Triadhi, Untung; Rusnadi, Rusnadi; Djajanti, Samitha Dewi; Amran, Muhammad Bachri; Zulfikar, Muhammad Ali
Makara Journal of Science Vol. 30, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

A dummy-template molecularly imprinted polymer (DMIP) was synthesized via precipitation polymerization using anthrone as a template analog for the selective analysis of low-molecular-weight polycyclic aromatic hydrocarbons (PAHs), specifically fluorene and phenanthrene. Styrene, benzoyl peroxide, and ethylene glycol dimethacrylate were employed as the functional monomer, radical initiator, and crosslinking agent, respectively. The synthesized polymers were characterized by Fourier-transform infrared spectroscopy, scanning electron microscopy, and particle size analysis. The imprinting factors were 1.16 and 1.09 for fluorene and phenanthrene, respectively, indicating enhanced affinity of the imprinted sites. High-performance liquid chromatography analysis following DMIP-based solid-phase extraction yielded recoveries of 91.49% ± 3.87% for fluorene and 97.25% ± 2.85% for phenanthrene, demonstrating the DMIP’s potential as an efficient sorbent for selective extraction and quantification of low-molecular-weight PAHs in simulated river water.
Co-Authors Djajanti, Samitha Dewi Handayani, Nurrahmi Muhammad Ali Zulfikar Muhammad Bachri Amran Muhammad Iqbal Nurhani Aryana, Nurhani Pinandita, Aria Prihadi, Az Zahra Utami Rusnadi Rusnadi Sri Wahyuni Theresia, Claresta Hara