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Modification of Chitosan-Coated Magnetic Material with Glycidyl-trimethylammonium Chloride for Cr(VI) Adsorption Kamilia, Salwa; Mukhayani, Feri; Sutarno, Sutarno; Nuryono, Nuryono
Indonesian Journal of Chemistry Vol 25, No 1 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.100749

Modification of chitosan-coated magnetic material with quaternary ammonium chloride as adsorbent for Cr(VI) anions has been studied. The works included magnetic material (MM) separation from iron sand, magnetic material-chitosan (MM/Chit) synthesis, and attachment of quaternary ammonium groups from glycidyl trimethyl ammonium chloride (GTMAC) on MM/Chit to produce MM/Chit/GTMAC with various mass ratios. Products were characterized with FTIR, XRD, SEM-EDX, and VSM. Adsorption studies were carried out in a batch system with pH, time, and initial Cr(VI) concentration variations. The unadsorbed Cr(VI) was analyzed with AAS, and the adsorbed Cr(VI) was calculated from the difference between initial and unadsorbed concentrations of Cr(VI). The results showed that MM/Chit/GTMAC was successfully synthesized, and adding GTMAC increased the stability of MM/Chit and shifted the optimum pH for Cr(VI) adsorption from 3.0 to 4.0. The study of kinetics and adsorption isotherm showed that the adsorption of Cr(VI) anion on the adsorbent MM/Chit/GTMAC (with the mass ratio of Chit to GTMAC 1:6) follows the pseudo-second-order kinetic model with the adsorption rate constant of 5.3 × 10−3 g mg−1 min−1 and Langmuir isotherms with the adsorption maximum capacity of 104.17 mg g−1, which has a potential to be applied for removing Cr(VI) from polluted wastewater.

Comparison of bombyx mori l. Fibroin coatings on the mechanical properties of collagen membranes Fathurrahman, Helmi; Sunarintyas, Siti; Barunawati, Sri Budi; Nuryono, Nuryono
Odonto : Dental Journal Vol 10, No 1 (2023): July 2023
Publisher : Faculty of Dentistry, Universitas Islam Sultan Agung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/odj.10.1.146-151

Background: Most of dental implants are accompanied by guided bone regeneration (GBR) procedures. Collagen membrane which is the most widely used type of membrane in the GBR procedure has the disadvantage of not having antimicrobial properties, old bone formation, easy to tear, and soft so that it does not maintain the dimensions of the augmentation area. Bombyx mori L. fibroin has good mechanical properties and has the potential to be used as a pharmaceutical material that is biocompatible, antimicrobial, and stimulates bone growth. The aim of this study was to analyze the effect of Bombyx mori L. fibroin coating on the mechanical properties of collagen membranes. Method: The samples consisted of the control group (group A) and the treatment group, the collagen membrane was coated using the Bombyx mori L dip-coating fibroin technique, namely group B (1 time coating process), group C (2 times coating process) and group D (3 times the coating process). Statistical analysis used one-way ANOVA (p

Comparison of bombyx mori l. Fibroin coatings on the mechanical properties of collagen membranes Fathurrahman, Helmi; Sunarintyas, Siti; Barunawati, Sri Budi; Nuryono, Nuryono
Odonto : Dental Journal Vol 10, No 1 (2023): July 2023
Publisher : Faculty of Dentistry, Universitas Islam Sultan Agung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/odj.10.1.146-151

Background: Most of dental implants are accompanied by guided bone regeneration (GBR) procedures. Collagen membrane which is the most widely used type of membrane in the GBR procedure has the disadvantage of not having antimicrobial properties, old bone formation, easy to tear, and soft so that it does not maintain the dimensions of the augmentation area. Bombyx mori L. fibroin has good mechanical properties and has the potential to be used as a pharmaceutical material that is biocompatible, antimicrobial, and stimulates bone growth. The aim of this study was to analyze the effect of Bombyx mori L. fibroin coating on the mechanical properties of collagen membranes. Method: The samples consisted of the control group (group A) and the treatment group, the collagen membrane was coated using the Bombyx mori L dip-coating fibroin technique, namely group B (1 time coating process), group C (2 times coating process) and group D (3 times the coating process). Statistical analysis used one-way ANOVA (p

Introducing Cu(II) onto SiO2-TiO2 with Rice Husk Ash as the Source of Silica and Its Catalytic Activity for Kumada Cross-coupling Reaction to Produce Biphenyl Compound Agustiningsih, Dewi; Nuryono, Nuryono; Santosa, Sri Juari; Kunarti, Eko Sri
Indonesian Journal of Chemistry Vol 25, No 3 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.99296

This research studied the preparation of SiO2-TiO2/Cu(II) by utilizing rice husk ash as the SiO2 precursor, and evaluated its efficiency as a heterogeneous catalyst in biphenyl synthesis through Kumada cross-coupling reaction, which is widely known as an important intermediate in pharmacology and agriculture manufacturing. In this study, the catalyst preparation was conducted by extracting SiO2 from rice husk ash, combining it with TiO2, and introducing Cu(II) onto its surface with CuCl2·2H2O as the precursor with various concentration of Cu(II). Comprehensive characterization using techniques such as IR, XRD, XRF, DLS, N2 isotherm adsorption-desorption, ICP-AES, STEM-EDS, TEM, UV-vis spectrometry, and TGA was conducted to examine the catalyst properties. Catalyst activity was evaluated in the Kumada cross-coupling reaction, using phenylmagnesium bromide and bromobenzene as reactants under stirring-heating condition, and the products were analyzed using GC-FID method. The characterization results indicated that the preparation of SiO2-TiO2/Cu(II) materials was successfully conducted and Cu(II) was formed as Cu(OH)2. The catalyst considerably promoted the Kumada cross-coupling reaction with a biphenyl yield of 78.85% at 50 °C for 6 h under stirring-heating method. Furthermore, catalyst reusability test demonstrated that the catalyst sustained performance over three cycles without losing its activity significantly. Interestingly, SiO2-TiO2 was observed to function primarily as support material and adsorbent, immobilizing Cu(II) and enhancing reactant reduction but not directly influencing biphenyl formation. Overall, this study contributes to the understanding of SiO2-TiO2/Cu(II) catalyst preparation and its application in biphenyl synthesis, offering insights into catalyst design and performance optimization for future applications in organic synthesis.

Betel Nut Peel Powder as Biosorbent for Mg(II), Ca(II), and Fe(III) in Agricultural Water Susiana, Carissa Ayu; Mukhayani, Feri; Simatupang, Erwinton; Pambudi, Fajar Inggit; Sumerta, I Wayan; Mulyanegara, Guntur; Samudin, Mohammad Nur; Prayoga, Dedo Kevin; Nuryono, Nuryono
Indonesian Journal of Chemistry Vol 25, No 3 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.104229

Water pollution from heavy metal contamination is a global issue; finding low-cost and sustainable solutions is challenging. Among various methods, biomass adsorption is a practical approach for treating heavy metal contamination in agricultural water. This study explored the use of betel nut peel as a biosorbent to remove Mg(II), Ca(II), and Fe(III) ions from agricultural water. The adsorbent contained active groups like −OH, C=O, and C=C, indicating cellulose, lignin, and hemicellulose compounds. Mature betel nut peels showed higher adsorption capacities than immature ones due to their larger surface area and more active sites. The optimal adsorption occurred at an initial adsorbate concentration of 100 mg L−1 for 1 h, with 5 mg of biosorbent. The biosorbent followed the Langmuir isotherm and a pseudo-second-order kinetic model (R2 = 0.99), indicating chemisorption. When applied to agricultural water from South Sumatra, the biosorbent removed up to 90% of Fe(III) ions. These findings suggest that betel nut peel powder has strong potential as a biosorbent for heavy metals, with promising applications in water treatment and environmental remediation. It also shows potential as a biofertilizer, particularly for soils rich in Fe(III).

Ultrasonic-Assisted Transesterification of Tripalmitin Using Limestone-Derived CaO Catalyst Nurdina, Rakhma Amalia; Kamiya, Yuichi; Hatmanto, Adhi Dwi; Pambudi, Fajar Inggit; Suyanta, Suyanta; Nuryono, Nuryono
Bulletin of Chemical Reaction Engineering & Catalysis 2025: BCREC Volume 20 Issue 4 Year 2025 (December 2025)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20456

In producing palm oil-based biodiesel (fatty acid methyl esters) through the transesterification of triglycerides with methanol, a high-performance and straightforward catalyst is required. This research studies the synthesis and characterization of limestone-derived calcium oxide as a heterogeneous base catalyst for the transesterification of tripalmitin, a representation of palm oil triglycerides, with methanol to produce methyl palmitate. Limestone was calcined at 800 °C to produce CaO. The resulting catalyst was characterized using TGA, XRD, FTIR, SAA, and CO2-TPD. The catalytic performance was compared with that of commercial calcium oxide under optimal reaction conditions, namely 50 °C temperature, 60 min reaction time, and 30 mg catalyst mass. The results showed that limestone-derived CaO produced a higher yield (44.6%) than commercial CaO (32.3%). The kinetics study showed that the reaction followed a two-order pseudo-kinetic model with a reaction rate constant value of 0.1450 L mmol-1 min-1. Overall, limestone-derived CaO proved to be an effective, inexpensive, and environmentally friendly alternative catalyst in the production of triglyceride-based biodiesel. Furthermore, the modification of CaO to enhance the catalytic activity needs to be explored further. Copyright © 2025 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Fabrication of Calcite Calcium Carbonate from Eggshells Biogenic Waste Through Carbonation Method Mariyam, Mariyam; Sunarintyas, Siti; Yuliatun, Leny; Khuzaimah, Ismi; Nuryono, Nuryono
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 11, No. 1, May 2025
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v11i1.41914

Calcium carbonate derived from eggshells has significant potential for use in drug delivery systems, pharmaceutical, food, catalyst, cement, and concrete industries. Although eggshell waste is non-toxic, its excessive accumulation in the environment may contribute to ecological issues. Colonizing pathogenic bacteria in unprocessed eggshell waste poses a potential health risk. The present study outlines the production of precipitated calcium carbonate (PCC) from eggshell waste through a calcination-carbonation process, offering a sustainable approach to its utilization. The calcination was carried out at 900 ºC. The carbonation process was performed in an HNO3 solution, and the NH3 solution was under-treated for 60 minutes. The results exhibited that the precipitated calcium carbonate (PCC) had a purity of 95.2% CaO. It possessed predominantly the calcite phase with a rhombohedral crystal system, as confirmed by the XRD analysis. The crystallite size of PCC was 109.5 nm, measured using the Debye-Scherrer equation. The phase composition of PCC was 99.3% calcite, 0.5% vaterite, and 0.2% aragonite. FTIR analysis further corroborated this data by showing a sharp and unsplit peak at 1419 cm-1, demonstrating the presence of a calcite phase. SEM images revealed a cubic-like morphology, a characteristic of the calcite form of calcium carbonate (CaCO3). The synthesized calcium carbonate in this study holds potential for applications in dental materials and as fillers in polymer matrices for food packaging.

Green Synthesis of ZnO/Ag Nanocomposite using Psidium guajava: A Study on Characterization and Potential Clinical Application as Advanced Antibacterial Agents on Cotton Bandages Khairunnisa, Yasmin Hasna; Kunarti, Eko Sri; Nuryono, Nuryono
Indonesian Journal of Chemistry Vol 26, No 2 (2026)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.110801

The development of innovative green antibacterial agents has been proposed as a strategy to combat bacterial resistance and improve wound healing. This research explores the synthesis of ZnO/Ag nanocomposites using guava leaf extract and evaluates their antibacterial properties. The study focused on optimizing ZnO nanoparticle synthesis by adjusting precursor concentrations, followed by Ag modification through variations in Ag precursor levels, pH, and reaction times to achieve optimal ZnO/Ag nanocomposites properties. The optimized ZnO and ZnO/Ag materials were applied to cotton bandages, and both the nanomaterials and the coated bandages were characterized using FTIR, SEM, TEM, and UV-vis-NIR, with their antibacterial activity tested against Staphylococcus aureus and Escherichia coli. The optimal synthesis conditions were identified as 0.60 M ZnO, 1% Ag, 2 h, and pH 12. The characterization results verified the successful synthesis of the ZnO/Ag nanocomposite and its effective coating on cotton bandages. Antibacterial test revealed that the ZnO/Ag demonstrated significantly greater activity than ZnO alone, with inhibition zones measuring 21.35 mm for S. aureus and 3.85 mm for E. coli. These outcomes highlight the potential of biosynthesized nanomaterials for use in clinical wound dressings to promote wound healing.

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