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All Journal Jurnal Kartika Kimia Makara Journal of Science Journal Serambi Engineering (JSE)
Muhammad Iqbal
Analytical Chemistry Research Group, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jawa Barat, Indonesia
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering

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Kinetic Study of Pb(II) Adsorption on Food-grade κ-Carrageenan Beads Felice Pricilla Hilmawan; Khalisha Rhea Amalia; Muhammad Iqbal; Syifabudi Chairurrizky; Untung Triadhi
Jurnal Serambi Engineering Vol. 9 No. 3 (2024): Juli 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Heavy metal contamination in open waters is one of the most urgent environmental problems that needs to be addressed. Pb(II) ion is a toxic heavy metal ion and is often found contaminating nature. Adsorption is one of the methods that is widely used to overcome heavy metal ion pollution such as Pb(II). One source of material that is low-cost, environmentally friendly, and readily available for use as an adsorbent is carrageenan. Carrageenan is an anionic polysaccharide and is a biopolymer that is widely found in the red algae Rhodophyceae. In this research, the adsorbent of κ-carrageenan beads made from food-grade κ-carrageenan cross-linked with K+ions was successfully made for the adsorption of Pb(II) ions which was confirmed using FTIR. The adsorbent swelling degree was 25.57% in aqua dm and 83.44% in 100 ppm Pb(II) solution. The results of the adsorption kinetics study show that adsorption follows a pseudo-second order kinetic model with a rate constant of 0.03399 g mg−1 min−1 and an adsorption capacity of 5.48 mg/g
Komposisi Proksimat dari Gracilia Sp, Sargassum Sp, dan Ulva Lactuca di Pantai Sayang Heulang, Garut Selatan, Jawa Barat, Indonesia Rusli, Handajaya; Lestari, Sri Dewi; Iqbal, Muhammad; Rusnadi, Rusnadi
Jurnal Kartika Kimia Vol 6 No 2 (2023): 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.v6i2.229

Abstract

Carbohydrate protein, fat, and minerals are the main ingredients of seaweed besides water. These main contents can vary depending on environmental conditions and the type of seaweed. Gracilaria sp, Sargassum sp, and Ulva lactuca grow widely and have been used on Sayang Heulang beach, South Garut, West Java, Indonesia. Unfortunately, no information was found for its main content that can indicate the seaweed quality. This research aims to conduct a proximate analysis of the three seaweeds, representing brown seaweed, red seaweed, and green seaweed, respectively. Carbohydrate total analysis was done using Luff Schoorl method and gave 11.2 %w/w, 25.3 %w/w, and 20.4 %w/w for Gracilaria sp, Sargassum sp, and U. lactuca, respectively. Determination of total protein using the Kjeldahl-Nessler method gives 6.5 %w/w for Gracilaria sp, 7.8 %w/w for Sargassum sp, and 8.7 %w/w for U. lactuca. The methods for fat analysis are Soxhlet extraction, which gives 0.3 %w/w for Gracilaria sp, 1.6 %w/w for Sargassum sp, and 1.1 %w/w for U.lactuca. The study also showed Gracilaria sp, Sargassum sp, and U. lactuca contain 26.9 %w/w, 23.6 %w/w, and 32.5 %w/w mineral content, respectively. These results indicate that different types of seaweed provide different chemical compositions.
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

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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 Felice Pricilla Hilmawan Handajaya Rusli, Handajaya Khalisha Rhea Amalia Muhammad Ali Zulfikar Muhammad Bachri Amran Nurhani Aryana, Nurhani Nurrahmi Handayani Pinandita, Aria Prihadi, Az Zahra Utami Rusnadi Rusnadi Sri Dewi Lestari, Sri Dewi Sri Wahyuni Syifabudi Chairurrizky Theresia, Claresta Hara Triadhi, Untung Untung Triadhi