cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kab. ogan ilir,
Sumatera selatan
INDONESIA
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)
Published by Universitas Sriwijaya
ISSN : 25409395     EISSN : 25409409     DOI : -
Core Subject : Science, Social,
Biochemistry, Genetics & Molecular Biology Chemistry Environmental Science
Indonesian Journal of Fundamental and Applied Chemistry (IJFAC) is an international research journal and invites contributions of original research articles as well as review articles in several areas of chemistry. The journal aims to publish refereed, high-quality research papers with significant novelty and short communications in all branches of chemistry. Papers which describe novel theory and its application to practice are welcome, as are those which illustrate the transfer of techniques from other disciplines. IJFAC calls for papers that cover the following fields: Biochemistry Inorganic chemistry Physical chemistry Organic chemistry Analytical chemistry Applied Chemistry All papers are peer reviewed by at least two referees. Papers presented at conferences are peer reviewed and selected with the same standards as individually submitted papers. They therefore have the same archival value. Article should be submitted by the Online Submission Module at www.ijfac.unsri.ac.id or email to ijfac@unsri.ac.id
Arjuna Subject : -
Articles 11 Documents
 1   2 
Search results for , issue "Vol 10, No 3 (2025): October 2025" : 11 Documents clear
Synthesis and Characterization of Terephthalic Acid MOF as a Catalyst for Biodiesel Production from Waste Cooking Oil Haryana, Rista; Hidayati, Nurlisa; Hasanudin, Hasanudin
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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

Abstract

Utilization of waste cooking oil as a raw material for biodiesel production is an effective solution to reduce environmental pollution and produce renewable energy. The high free fatty acid content in waste cooking oil is a major problem in the industry, so it requires an effective catalyst in the biodiesel production process. Zn terephthalate MOF has a large surface area, porous structure, and good thermal stability, making it very effective as a heterogeneous catalyst for the biodiesel esterification process. This study aims to synthesize and characterize Zn terephthalate MOF using a hydrothermal method with a Teflon autoclave, and evaluate its effectiveness as a catalyst. The analysis was carried out by testing the acidity of the Zn terephthalate MOF catalyst characterized by XRD, TGA, PSA, and the ability to convert waste cooking oil into biodiesel. The results showed that the obtained MOF-5 had an acidity of 4.33 mmol/g, the XRD results showed a 2 theta angle and the catalyst intensity was the same as JCPDS no. 96-432-6738. TGA results showed that the Zn terephthalate catalyst had thermal stability up to 300OC, and PSA results showed particles distributed at 8428.62 nm. This proves that the Zn terephthalate MOF catalyst can reduce the FFA value of waste cooking oil and convert it into biodiesel with a conversion rate of 94.18%, and the catalyst can be reused up to five times with relatively stable performance
Optimization of the cultural conditions to enhance lipase production by environmental bacteria Hameed, Zainab Qais; Alyousif, Nassir Abdullah
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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

Abstract

The production of lipase enzymes has played an essential role in biotechnology since they are used in various environmental applications, including oil pollution treatment. The present study aims to increase the production of lipase enzymes by optimizing nutritional and environmental factors from bacteria isolated from the soil and water from different sites in Basrah province. Seven bacterial isolates out of the fifty that showed positive results in the primary screening exhibited the highest activity in the secondary screening. These isolates belong to the species including Bacillus subtilis strain QD517, Bacillus velezensis strain Bac104, Bacillus subtilis strain PK9, Bacillus cereus strain RB1, Enterobacter cloacae strain YY-2, Bacillus subtilis strain SPA N1, and Bacillus velezensis strain FJ23. The values of lipase enzyme activities of the seven isolates under normal cultivation conditions were 49 U/ml, 28 U/ml, 24 U/ml, 23 U/ml, 23 U/ml, 18 U/ml, and 18 U/ml, respectively. Nutritional and environmental factors including carbon sources, nitrogen sources, phosphorus sources, temperature, pH, and incubation period were examined in this study to increase lipase enzyme activity.  The optimal environmental and nutritional conditions were 37 °C, a pH of 7, sunflower oil as the best carbon source, peptone as the best nitrogen source, NH₄H₂PO₄ as the best phosphorus supply and four days as the optimum period of incubation. The maximum lipase activity values for the seven bacterial isolates under optimal conditions were 89 U/ml, 91 U/ml, 86 U/ml, 92 U/ml, 88 U/ml, 88 U/ml, and 89 U/ml, respectively for the bacterial isolates of Bacillus velezensis strain Bac104, Bacillus subtilis strain PK9, Bacillus cereus strain RB1, Bacillus subtilis strain QD517, Bacillus subtilis strain SPA N1, Bacillus velezensis strain FJ23, and Enterobacter cloacae strain YY-2.
Review of Carbon Capture Technology and Its Potential Application to Reduce Emissions In Heavy Equipment Exhausts Putri, Mutiara; Aisyah, Nyayu; Sugiyanto, Sugiyanto; Trisnaliani, Lety
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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

Abstract

Carbon emissions from diesel engines, particularly those from heavy equipment, are a significant greenhouse gas emitter in industries such as construction, mining, and logistics. As global efforts toward decarbonization intensify, carbon capture technologies offer a solution to reduce global emissions. This paper conducts a literature review to explore current carbon capture technologies—including chemical sequestration, physical sequestration, and membrane separation—and evaluates their potential for integration with heavy equipment exhaust systems. Key considerations include system size, energy requirements, maintenance, and operational compatibility. Integration of exhaust heat recovery systems is also assessed as a complementary solution to address the high energy demands of carbon capture in the environment. Technical, economic, and regulatory challenges are discussed, along with potential innovations and use cases that could support future deployments. The findings indicate that although carbon capture is still in its infancy, targeted applications and modular designs supported by policy incentives could enable practical implementation in the near future. This review provides a foundation for future research, pilot projects, and system designs aimed at enabling sustainable operation of heavy equipment
The Influence of Hydrogen Flow Rate and Humidifier Temperature on Performance of a PEMFC with Ti-Co/C Catalyst Adhiyanti, Nurmalina; Rohendi, Dedi; Utama, Muhammad Prima; Syarif, Nirwan; Rachmat, Addy; Yulianti, Dwi Hawa; Normah, Normah
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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

Abstract

This study explores the effect of hydrogen flow rate and humidifier temperature on the performance of the Membrane Electrode Assembly (MEA) using Ti-Co/C catalyst at the cathode and Pt/C at the anode in a single-cell Proton Exchange Membrane Fuel Cell (PEMFC). MEAs were fabricated by the spraying method and characterized using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) to determine their electrochemical surface area (ECSA) and conductivity. The results showed that the optimized ECSA value reached 8.38 cm2/g, and the electrical conductivity was 3.76 × 10-8 S/cm. The best performance was achieved at a hydrogen flow rate of 100 mL/min and room temperature humidification. Under the hydrogen flow rate test, the maximum power density reached 0.364 mW/cm2, while in the humidifier temperature variation, a maximum power density of 0.375 mW/cm2  was obtained at a current density 2.4 mA/cm2. These findings suggest that Ti-Co/C is a promising low-cost catalyst alternative to Pt and that operational conditions play a critical role in MEA performance
Antidiabetic Activity and Analysis Chemical Compound of Fractions of Leucas lavandulifolia leaves Carissa, Restri Diah; Yohandini, Heni; Muharni, Muharni
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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

Abstract

Leucas lavandulifolia is one traditional medicine that has been used for the treatment of rheumatism, skin diseases, wounds, diabetes, and migraine treatment. This research aimed to test the antidiabetic activity of the leaf fractions of Leucas lavandulifolia and to identify the chemical content of the selected column fraction. Fractionation was carried out using the graded extraction method with the solvents n-hexane, ethyl acetate, methanol. Testing of antidiabetic activity was performed using the α-glucosidase inhibition method and analysis of the chemical composition content of the selected fraction was performed using the GC-MS method. The research results showed the Ethyl acetate fraction provided the highest antidiabetic activity (IC50 = 4.985 µg/mL) compared to the other fractions and even higher compared to the positive control acarbose (IC50 = 67.07 µg/mL). Separation of the ethyl acetate fraction showed subfractions F6.3 and F6.5 showed the simplest spot pattern. Identification of chemical content with GC-MS showed subfraction F6.3 contained the main component naphthalenepropanal derivative (17.21%) and subfraction F6.5 with the main component fatty acid. Subfractions F6.3 and F6.5 also showed antidiabetic activities with IC50 values of 17.3 and 36.72 µg/mL, respectively, with a very strong category. This indicates the ethyl acetate fraction of L. lavandulifolia leaves is potential to be developed as a source of antidiabetic compounds
Synthesis of Ag/CeO2 Nanocomposites with Noni Leaf Extract and Its Potential Antibacterial Properties Denada, Laellia; Hariani, Poedji Loekitowati; Aprianti, Nabila
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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

Abstract

This study aims to perform green synthesis of Ag/CeO2 nanocomposites using noni leaf extract and to test their potential antibacterial activity. The synthesis results were characterised using X-ray Diffraction (XRD) to determine crystallite size, Scanning Electron Microscope-Energy Dispersive Spectroscopy (SEM-EDX) to observe morphology and elemental composition, and Fourier Transform Infrared Spectroscopy (FTIR) to identify functional groups. The XRD characterization results showed the formation of typical Ag/CeO2 peaks with an average crystallite size of 15,28 nm. SEM analysis revealed morphology in the form of aggregates with varying sizes. EDX results confirmed the presence of Ag, Ce, and O elements. FTIR analysis showed the presence of typical Ce–O group absorption bands, which supports the successful synthesis of Ag/CeO2. The synthesized nanocomposites were then tested for their antibacterial activity against Escherichia coli and Staphylococcus aureus bacteria. Antibacterial activity tests showed the formation of an 8 mm zone of inhibition (ZOI) at a concentration of 5000 ppm, demonstrating the potential of the synthesized green Ag/CeO2 as an antibacterial agent. This study confirms that the use of noni leaf extract as a reducing and stabilizing agent is an environmentally friendly approach and has potential for environmental applications.
Modification of Activated Carbon from Palm Kernel Shells with Fe₃O₄ Magnetic for Water Treatment of Enim River Damayanti, Damayanti; Arita, Susila; Hariani, Poedji Loekitowati
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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

Abstract

The economical, easy-to-implement, and regenerative treatment methods are essential to obtain clean water. In this study, activated carbon was synthesized from palm kernel shells using ZnCl₂ as an activator. The activated carbon was then modified with Fe₃O₄. The resulting activated carbon and activated carbon-Fe₃O₄ product were characterized using XRD, SEM-EDX, VSM, and BET surface area analysis. Furthermore, activated carbon-Fe3O4 was applied to reduce Fe ions, turbidity, and total suspended solids (TSS) and increase the pH value in Enim river water. The resulting activated carbon has met SNI standards, with a moisture content of 8.81%, ash content of 5.475%, and an iodine adsorption capacity of 1763.86 mg/L. The synthesized activated carbon-Fe₃O₄ exhibits strong magnetic properties, with a saturation magnetization value of 68.82 emu/g and a surface area of 355.42 m²/g. Optimal conditions for the treatment of Enim river water were obtained at an adsorbent dose of 40 mg/L, a stirring rate of 120 rpm, and a stirring time of 120 minutes. Under these conditions, the Fe ion reduction efficiency reached 96.95%, turbidity 89.83%, and TSS 80.74%, while the pH increased from 6.23 to 6.74. FTIR analysis showed a change in peak intensity in the activated carbon-Fe₃O₄ after the adsorption process, indicating interaction with contaminants. The adsorption process of Fe ions by activated carbon-Fe₃O₄ follows a pseudo-second-order kinetic model.
Synthesis Of CoFe2O4 Nanoparticle and Antibacterial Activity Test Purwitasari, Listiyani; Hariani, Poedji Loekitowati; Sisca, Vivi
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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

Abstract

Cobalt ferrite (CoFe₂O₄) is a spinel ferrite-based material known for its excellent magnetic properties and chemical stability, making it as a promising candidate for biomedical applications as well as an antibacterial agent. This study aims to synthesize CoFe₂O₄ nanoparticles by a coprecipitation methode and evaluate their antibacterial activity against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria. The synthesized products were characterized by using several instruments includes X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), FTIR spectroscopy and Vibrating Sampel Magnetometer (VSM) in order to determine its crystal structure, particle morphology, functional groups, and magnetic properties. Antibacterial activity was assessed by using the disk diffusion method. The results showed that CoFe₂O₄ nanoparticles were successfully synthesized with nanometer-scale crystallite sizes and exhibited strong ferromagnetic properties. Antibacterial tests demonstrated inhibition zones against the growth of S. aureus and E. coli, indicating that CoFe₂O₄ has potential as an antibacterial agent. The effectiveness of antibacterial activity was influenced by nanoparticle concentration and the type of tested bacteria. This research opens up further opportunities for the development of CoFe₂O₄ applications in health and environmental fields.
Ecoenzyme Characterization of Fruit Peel Waste Mixture and Test of Antibacterial Activity against Bacteria Causing Dental Caries Julinar, Julinar; Uswati, Dinii; Riyanti, Fahma; Musifa, Eva
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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

Abstract

Ecoenzyme is a product of facultative aerobic fermentation for 3 months from organic fruit and vegetable waste. In this study, ecoenzyme was made from a mixture of fruit peel waste (papaya, orange and pineapple) with the addition of 6 liters of water. Ecoenzyme products were characterized by organoleptic properties, chemical composition, enzyme activity and antibacterial activity tests against Lactobacillus acidophilus and Streptococcus mutans bacteria that cause dental caries. The results of the study show that the ecoenzyme product had a dominant orange peel sour flavor, was cloudy brown in color with a volume of 8.4 liters from 6 liters of added water. The characterization results depict that the chemical composition of ecoenzyme contained acetic acid and lactic acid with a total acid content of 2.26%, 40.45 mg/mL protein, and secondary metabolites in the form of alkaloids, flavonoids, and saponins. The activity of several enzymes from ecoenzyme was protease 0.0246 U/mL, amylase 0.0032 U/mL and lipase 5 U/mL. Antibacterial activity against bacteria that cause dental caries is included in the category of very strong against S. mutans at a concentration of 40 (% v/v) and moderate against L. acidophilus with inhibition zone diameters of 23.33 mm and 8.23 mm respectively. The Mininum Inhibitory Concentration (MIC) and Minimum Killing Concentration (MKC) values of ecoenzyme against S. mutans and L. acidophilus bacteria were 2500 ppm and 5000 ppm respectively.Keywords: ecoenzyme, fruit-peel waste, L.acidophilus, S.mutans, antibacterial
Preparation of Palm Kernel Shell Binchotan for Radio Frequency Energy Harvesting Sya'baniah, Nyimas Febrika; Syarif, Nirwan; Rohendi, Dedi; Rachmat, Addy; Syahputra, Rio Aldo
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 3 (2025): October 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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

Abstract

Research on the development of radio frequency energy harvesting slabs from palm kernel shells binchotan has been done. The slabs were characterized by using XRD and FTIR intrumentations to determine their crystallography and functional groups. The electrical response of slabs was measured on impedance spectroscopy instrumentation. The conductivity, impedance, and dielectric constant were calculated from impedance spectroscopy data. Diffractograms showed crystalline carbon and confirmed with the existence of peaks, at 2θ, 24.5° and 44.56°. FTIR analysis showed that carbon palm shells have the absorption length is in the range of wave numbers 1100 – 1200 cm-1 for CO of carboxylic acid, aldehyde, ketone and ester, from 1475 to 1600 cm-1 for C=C aromatic ring and double peaks in 1900 – 2100 cm-1 for conjugated C-C. The slabs conductivity varies from 1 to 7 mScm-1. Impedance values for the slabs vary from 1.5 to 2.4 ohm. Dielectric constants for the slabs range from 0.42 to 140.

Page 1 of 2 | Total Record : 11

 1   2 

Filter by Year

2025 2025


Reset
Filter By Issues
All Issue Vol 10, No 3 (2025): October 2025 Vol 10, No 2 (2025): June 2025 Vol 10, No 1 (2025): February 2025 Vol 9, No 3 (2024): October 2024 Vol 9, No 2 (2024): June 2024 Vol 9, No 1 (2024): February 2024 Vol 8, No 3 (2023): October 2023 Vol 8, No 2 (2023): June 2023 Vol 8, No 1 (2023): February 2023 Vol 7, No 3 (2022): October 2022 Vol 7, No 2 (2022): June 2022 Vol 7, No 1 (2022): February 2022 Vol 6, No 3 (2021): October 2021 Vol 6, No 2 (2021): June 2021 Vol 6, No 1 (2021): February 2021 Vol 5, No 3 (2020): October 2020 Vol 5, No 2 (2020): June 2020 Vol 5, No 1 (2020): February 2020 Vol 4, No 3 (2019): October 2019 Vol 4, No 2 (2019): June 2019 Vol 4, No 1 (2019): February 2019 Vol 3, No 3 (2018): October 2018 Vol 3, No 2 (2018): June 2018 Vol 3, No 1 (2018): February 2018 Vol 2, No 3 (2017): October 2017 Vol 2, No 2 (2017): June 2017 Vol 2, No 1 (2017): February 2017 Vol 1, No 3 (2016): October 2016 Vol 1, No 2 (2016): June 2016 Vol 1, No 1 (2016): February 2016 More Issue