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Acta Chimica Asiana
Published by Universitas Mataram
ISSN : 2550049x     EISSN : 25500503     DOI : -
Core Subject : Science,
Chemistry
Acta Chimica Asiana (online ISSN 2550-0503, print ISSN 2550-049x) is a peer-reviewed, open access journal that publishes high-quality original research articles as well as review articles in all areas of Chemistry and Chemical Engineering. Significant finding that is insufficient to be presented as comprehensive paper but needs to reach the reader immediately may also be submitted as a short communication. The editors welcome original contributions that have not been published and are not under consideration elsewhere. This journal published by the Indonesian Chemical Society, Chapter Nusa Tenggara and the University of Mataram. All papers published free of charge. Upon request, language assistance may also be provided to ensure valuable works in chemistry meet their readers. Acta Chimica Asiana is a peer-reviewed, open access journal that publishes original research articles, review articles, as well as short communication in all areas of chemistry, including applied chemistry, and chemical engineering. Subject areas include (but are by no means limited to): 1. Analytical chemistry, including new techniques and instrumentation 2. Biochemistry and medicinal chemistry 3. Inorganic chemistry, including main group, transition metal, and f-block compounds, as well as coordination, organometallic, and solid state chemistry 4. Materials chemistry of hard and soft matter, from the nanoscale upwards 5. Nuclear chemistry and radioactivity 6. Organic chemistry, including synthesis, characterization, and properties of organic compounds, as well as study of organic reactions and their mechanisms 7. Physical chemistry and chemical physics 8. Sustainable, green, and environmental chemistry 9. Theoretical and computational chemistry
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 13 Documents
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Search results for , issue "Vol. 8 No. 2 (2025)" : 13 Documents clear
Synthesis and characterization of silver nanoparticles using Ocimum gratissimum root extract and their biological activities against some clinical pathogens Nzerema, Chioma Mercy; Nna, Prince Joe; Orie, Kingsley John
Acta Chimica Asiana Vol. 8 No. 2 (2025)
Publisher : The Indonesian Chemical Society, Chapter Nusa Tenggara and The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v8i2.267

Abstract

This study investigates the green synthesis of silver nanoparticles (AgNPs) using Ocimum gratissimum root extract, along with their characterization and antibacterial efficacy. Proximal analysis revealed low moisture (8.02 ± 0.11%), crude protein (3.31 ± 0.28%), crude fat (2.01 ± 0.59%), moderate fibre (9.18 ± 0.40%), and ash (5.11 ± 0.91%), indicating a carbohydrate-rich composition. AgNPs were synthesized using the root extract as reducing and stabilizing agent; UV–Vis spectroscopy confirmed their formation with a surface plasmon resonance peak at 425 nm, consistent with spherical nanoparticles (30–100 nm). FTIR identified phenolic and polysaccharide functional groups (O–H, C=O, C–O), while XRD indicated a face-centered cubic (FCC) structure with good crystallinity. SEM micrographs showed mostly spherical particles with minimal aggregation. Antimicrobial activity at 10–20 mg/mL was tested against Proteus mirabilis, Pseudomonas aeruginosa, Bacillus cereus, Aspergillus fumigatus, Candida albicans, and Saccharomyces cerevisiae. The root extract alone showed no activity at 10 mg/mL but exhibited dose-dependent inhibition at higher concentrations (ZOIs: 10.40–15.16 mm). AgNPs displayed stronger broad-spectrum efficacy (ZOIs: 7.12–18.9 mm), often surpassing gentamicin. These findings highlight the potential of O. gratissimum root-derived AgNPs as eco-friendly antibacterial agents against multidrug-resistant organisms.
Physically activated corn cob carbon for congo red and methanil yellow removal Sholehah, Faridatun; Adawiyah, Rabiatul; Bahrun, Bahrun
Acta Chimica Asiana Vol. 8 No. 2 (2025)
Publisher : The Indonesian Chemical Society, Chapter Nusa Tenggara and The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v8i2.272

Abstract

The conversion of agricultural residues into sustainable adsorbents provides an environmentally responsible pathway for advanced wastewater treatment. In this work, physically activated carbon was synthesized from corncob, an abundant and underutilized agricultural byproduct, through carbon dioxide activation at elevated temperatures. Comprehensive characterization using BET surface area analysis, SEM-EDX, and FTIR confirmed the formation of a highly porous structure with abundant surface functional groups, favourable for dye adsorption. The adsorbent exhibited excellent performance in removing Congo Red (CR) and Metanil Yellow (MY), achieving maximum adsorption capacities of 59.88 mg/g and 30.47 mg/g, respectively. The Langmuir isotherm provides a good description of the equilibrium data, while the kinetic results follow the pseudo-second-order model, indicating that monolayer chemisorption is the dominant mechanism. These findings underscore the potential of corncob-derived activated carbon as a cost-effective, renewable, and high-performance material for sustainable wastewater remediation
Optimization of microwave irradiation time for KOH-activated carbon from oil palm fronds Zikri, Rahmat; Sapitri, Ayu; Rati , Yolanda
Acta Chimica Asiana Vol. 8 No. 2 (2025)
Publisher : The Indonesian Chemical Society, Chapter Nusa Tenggara and The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v8i2.275

Abstract

Activated carbon is a widely applied adsorbent material in wastewater treatment, whose physical and chemical properties are strongly influenced by the activation method employed. Microwave irradiation–based physical activation has emerged as an attractive alternative, offering shorter processing times and lower energy consumption compared to conventional heating methods. This study aims to evaluate the effect of varying microwave irradiation times on the characteristics of activated carbon derived from oil palm fronds (OPF) waste. The synthesis process began with carbonization at 600 °C for 60 minutes to produce OPF char, followed by chemical activation using KOH with a char-to-KOH mass ratio of 1:1 (g/g) in 100 mL of demineralized water, and subsequently physical activation using a microwave at 200 W for 5 minutes (A5D200), 10 minutes (A10D200), and 15 minutes (A15D200). Characterization was conducted in accordance with SNI 06-3730-1995 standards (moisture content, ash content, and iodine adsorption capacity), as well as physicochemical analyses including crystallinity, surface area, functional groups, morphology, and elemental composition. The results demonstrated that all samples met the SNI requirements, with the highest iodine adsorption capacity (828.69 mg/g) and the largest surface area (824.26 m²/g) obtained at A10D200. XRD analysis revealed the dominance of amorphous structures with an increasing Lc/La ratio as the irradiation time increased, while SEM images showed relatively small and uniformly distributed pores. FTIR spectra confirmed the presence of O–H, C=O, C=C, C–H, and C–O functional groups. In conclusion, a 10-minute irradiation time produced activated carbon with an optimal balance between pore structure, surface area, and adsorption capacity

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