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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 196 Documents
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Hydrogen Production from Aluminum Waste Using the Aluminum-Water Method with Potassium as Activator Amelia, Icha; Rohendi, Dedi; Rachmat, Addy; Syarif, Nirwan; Yulianti, Dwi Hawa; Sya'baniah, Nyimas Febrika; Adhiyanti, Nurmalina; Adelia, Ory; Normah, Normah
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 9, No 2 (2024): June 2024
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v9.i2.111

Abstract

Research on hydrogen production from aluminum waste using the aluminum-water method using potassium as an activator has been successfully carried out. This research aims to determine the performance of the potassium activator in hydrogen production with variable water volume and potassium percentage. Hydrogen gas production is carried out using 60 mesh aluminum waste. Optimum conditions were achieved when a mass of 1 gram of aluminum was reacted with an additional volume of water of 1.5 mL, and 7% w/w of the activator mass, with the production of hydrogen gas of 553 mL at a production rate of 69 mL/minute.
Tannin Extraction from Bark of Cinnamomum burmannii and Its Application for use as Natural Dye and as Antioxidant Rizki, Widya Twiny; Wahyuni, Winika Sri; Sari, Ririn Depita; Lestari, Siti Marwah; Rahmadevi, Rahmadevi
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 9, No 1 (2024): February 2024
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v9.i1.35

Abstract

Cinnamon bark (Cinnamomum burmannii) contains tannins which have the potential to act as natural dyes. This research is to synthesize natural dye from cinnamon bark extract (Cinnamomum burmannii). The research was carried out by making cinnamon bark extract by comparing the amount of solvent by maceration using 96% ethanol, calculating the yield, tannin analysis, FTIR analysis, and stability test color. The comparison of the amount of cinnamon bark extraction solvent affected the resulting yield. Testing the tannin compound with 1% gelatin reagent in 10% NaCl showed a white precipitate and 1% FeCl3 reagent produced a greenish-brown color so the extract was positive for tannin, analysis FTIR ratio 1:10 for the presence of O-H, C-H, C=C, C-O groups, ratio 1:15 for the presence of O-H, C-H, C=C, C-O group. The color stability test of cinnamon bark extract is more stable than Rhodamine-B. Based on the extraction results, it was concluded that cinnamon bark extract can be used as an alternative to natural dye in cosmetic products.Keywords: Cinnamon Bark, Extract, FTIR Analysis, Natural dyes, Tannin
The Effect Of Purple Sweet Potato Starch Variation On Marshmallow Characteristics Ningsih, Ayu Puspita; Marlina, Lusi
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 9, No 3 (2024): October 2024
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v9.i3.130

Abstract

Purple sweet potato contains antioxidants such as beta-carotene and anthocyanins that have health benefits. This study utilizes purple sweet potato that has been processed into starch as a raw material for making marshmallows. This study aims to determine the best variation of purple sweet potato starch on marshmallow characteristics and its effect by referring to standards on soft confectionery. The research conducted was experimental with a Completely Randomized Design (CRD). The tests carried out include water content test, organoleptic test, acidity (pH) test and antioxidant activity. In the organoleptic test, there were significant differences in taste and texture, while in color and aroma, there were no significant differences. Hedonic test showed that panelists preferred the taste of marshmallows with 10 grams of purple sweet potato starch in sample a1. The best moisture content was found to be 17.74% in sample a1 dp and 17.81% in sample a2. The acidity (pH) value was found to be 6.88 in samples a1 and a1 dp and 6.5 in sample a3. Antioxidant activity in sample a1 was 50.11% and sample a3 was 38.73%. Based on the results of all tests, the results are in accordance with SNI 3547.2: 2008 Keywords: Marshmallow, Purple Sweet Potato Starch, Purple Sweet Potato, Kruskall Wallis Test, Variation of Purple Sweet Potato Starch
Synthesis and Characterization of Schiff Base from 4,4-Diaminodiphenyl Ether and Vanillin and its Interaction with Cu2+ Metal Ion Hidayati, Nurlisa; Dhamayanti, Erika; Desnelli, Desnelli; Said, Muhammad; Yuliasari, Nova; Nurlailia, Umi
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 9, No 3 (2024): October 2024
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v9.i3.163

Abstract

The Schiff base has synthesized from the reaction between 4,4-diaminodiphenyl ether and vanillin. The resulting Schiff base acts as a ligand and interacts with Cu2+ metal ions to form a complex compound. The Schiff base was analyzed using UV-visible and FT-IR spectroscopy, as well as X-ray diffraction (XRD). The stability of the Schiff base under different pH conditions was investigated, along with the interference effects of Cd2+ and Zn2+ ions on the formation of Schiff base complexes with Cu2+. The formation of a yellow solid crystal indicated the successful synthesis of the Schiff base. The appearance of maximum absorption at 250 nm on the UV-Vis spectra signifies the electronic transition from π to π*. Absorption spectra at 1600 cm-1 indicate the presence of an azomethine group. The diffraction pattern showed a sharp peak at an angle of 2θ= 19.301°, 51.04° for the Schiff base 4,4-diamino diphenyl ether-vanillin. Schiff base compounds exhibit the highest stability at pH 5, where the C=N double bond formed is more stable than other pH. Schiff base ligands form complexes with Cu2+ metal ions, characterized by absorption in the charge transfer region (LMCT) at λ 400 nm and the d-d transition at λ 630 nm. The presence of Cd²⁺ and Zn²⁺ metal ions shifting absorption of the Schiff Base-Cu²⁺ ligand complex towards shorter wavelengths (hypsochromic effect)
Synthesis and Characterization of ZnO with Calcination Temperature Variation and Surfactant Addition using Chemical Coprecipitation Method Charlena, Charlena; Sugiarti, Sri; Khefanny, Yemima Chellyne
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 9, No 3 (2024): October 2024
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v9.i3.123

Abstract

This study aims to synthesize ZnO using the coprecipitation method and characterize it using various instrumentation techniques. The calcination temperature variation treatment was carried out to produce particles with good size and crystallinity levels. Adding polyvinyl pyrrolidone (PVP) surfactant during the synthesis of ZnO aims to prevent agglomeration. ZnO characterization used ultraviolet-visible spectroscopy (UV-Vis), X-ray diffraction (XRD), Fourier transform spectroscopy (FTIR), and scanning electron microscopy (SEM). The result showed that the value of the ZnO band gap increased with increasing temperature. ZnO synthesized at a calcination temperature of 800 °C has a hexagonal wurtzite structure. The crystal size of ZnO is 45.64 nm, while ZnO-PVP's is 40.37 nm. The best ZnO crystallinity level is 61.34%. The FTIR spectrum shows ZnO absorption in the fingerprint region (525 cm-1). SEM micrographs showed that ZnO without the addition of PVP agglomerated. The synthesized ZnO has an antibacterial activity, indicated by forming an inhibition zone (7.84 mm
Optimization of Coal Fly Ash Heating Temperature as an Adsorbent to Improve Acid Mine Water Quality Ridhowan, Thoufiq; Yusmartini, Eka Sri; Kharismadewi, Dian
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 9, No 3 (2024): October 2024
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v9.i3.139

Abstract

Fly ash, a fine dust from coal combustion in steam power plants, is an unused waste material that can be repurposed as a low-cost adsorbent. One type of adsorbent that can be synthesized from fly ash is zeolite-like material (ZLM), which has a porous structure capable of absorbing molecules smaller than or equal to its cavity size. In this study, untreated and heat-activated fly ash at 100, 200, and 300°C was used as an adsorbent for acid mine water. Adsorbent mass varied between 6, 8, 10, 12, and 14 g, mixed with 130 mL of mine water and stirred at 150 rpm for 60 minutes. The results showed that heat activation increased the surface area of the fly ash adsorbent, reaching 22.658 m²/g at 300°C. Heat-treated fly ash at 200 and 300°C showed a more significant reduction in Fe and Mn levels, especially with 8 g of adsorbent. Additionally, all adsorbents, whether heated or not, raised the pH of the acid mine water. The total suspended solids (TSS) were reduced to meet quality standards using 14 g of adsorbent heated to 300°C. These results indicate that coal fly ash adsorbent can be effectively applied for treating acid mine water
Synthesis Gas Production From Palm Oil Shell Waste Using Al/Cr Metal Pillared Bentonite Catalyst For Eco-Friendly Fuel Puspita, Indah; Faizal, Muhammad; Bahrin, David
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 9, No 3 (2024): October 2024
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v9.i3.147

Abstract

The production of palm oil shell waste in the palm oil industry is increasing,  but the utilization of palm oil shell waste has not been utilized optimally. Palm Oil Shells must be processed and utilized to reduce pollution and increase the use value of waste. This research aims to utilize palm oil shell waste using an Al/Cr metal pillared bentonite catalyst with a gasification process to produce synthesis gas. The bentonite pillarization process using Al/Cr metal aims to increase the catalyst surface area, basal distance and catalyst surface acidity so as to increase the catalytic activity of the catalyst in the gasification process. The gasification process is carried out at temperatures of 450, 500, 550 and 600°C. Adding the Al/Cr metal pillared bentonite catalyst, the H2 concentration increased significantly. The effect of increasing temperature can increase the H2 content by consuming CO within a certain time limit. The gasification process at temperature 600°C with a 20% Al/Cr metal pillared bentonite catalyst is the optimal condition for producing synthesis gas. The heating value of the gasification results in terms of the optimum HHV and LHV values is 16.21 MJ/Nm3 and 14.59 MJ/Nm3. Based on research, gasification of palm oil shells using an Al/Cr metal pillared bentonite catalyst is feasible for the production of environmentally friendly fuel
Modification of CaO from Quail Egg Shells with Sodium Dodecyl Sulfate through Extraction and Precipitation Method as Adsorbent for Methylene Blue Dyes Purwaningrum, Widia; Manurung, Yolanda Fany Claudia; Fatma, Fatma; Mara, Ady
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 9, No 3 (2024): October 2024
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v9.i3.155

Abstract

Calcium oxide (CaO) is widely used as an adsorbent due to high adsorption effectiveness and can adsorb metals in wastewater and dye waste. The aim of this research is to synthesize CaO from quail egg shells and then modify it using sodium dodecyl sulfate surfactant. Synthesis of CaO was carried out through the extraction method using HCl 1% and precipitation method using Na2CO3 1M. Modified CaO was synthesized by the same method with the addition of Sodium Dodecyl Sulfate (SDS).  Diffractogram peaks on CaO and  CaO modifications are similar to JCPDS data No.88-1811. CaO IR spectrum modification after adsorption showed the addition of functional groups C-N and C=N from methylene blue. CaO and CaO's modifications had pHpzc of 11.82 and 11.62. CaO modification using SDS caused a decrease in the surface area of CaO from 3.9 to 2.5 m2/g and an increase in the pore radius from 3.6 to 13.5 nm. Modification of CaO using SDS decrease the surface area of CaO but adsorption capacity increases 66.19% from 44.63 mg/g to 74.17 mg/g. Kinetic model and adsorption isotherm on CaO and CaO modifications occur in pseudo-second order by following the Langmuir isotherm model. The adsorption process is endothermic and adsorption occurs spontaneously with positive ∆Ho and negative ∆Go values at each adsorption temperature
Antibacterial activity of deodorant stick formula from ethyl acetate fraction of beluntas leaves (Pluchea indica L.) against Pseudomonas aeruginosa and Streptococcus pyogenes bacteria that cause body odor. Adriana, Yulis; Fauziah, Siva
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 1 (2025): February 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

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

Abstract

Beluntas contains flavonoids, tannins and steroids which can inhibit growth and reduce the risk of infection by microorganisms. Empirically, beluntas leaves are used by people to overcome unpleasant body odor, usually body odor is caused by the Pseudomonas aeruginosa and Streptococcus pyogenes. Stick deodorant is a cosmetic made from; sodium stearate (steric acid and sodium hydroxide) and as a solvent using propylene glycol. The aim of this research was to formulate the ethyl acetate fraction of beluntas leaves into a stick deodorant and test the antibacterial activity of Pseudomonas aeruginosa and Streptococcus pyogenes using the well diffusion method and test physical, chemical and quality parameters. microbiology. Stick deodorant were made into three formulations with different concentrations of the ethyl acetate fraction of beluntas leaves, namely Formula I with a concentration of 20%, Formula II is 30% and Formula III is 40% with the harding agent stearic acid: NaoH 10% (8.5:7.5). The quality test of the three formulation sticks deodorants met the requirements for pH test (range 6-7.0), homogeneity test, melting point test (range 55.40-60.9 °C), Microbiology test and water capacity test (aw). The results of the inhibition test against Streptococcus pyogenes were between 23.33-8.33 mm in the very strong inhibition category, the comparison deodorant had no inhibitory area and gentamycin 0.01% as a positive control had an inhibitory area of 29.66 mm in the very strong category. The inhibitory power against Pseudomonas aeruginosa is 11.5-18.92 mm in the strong inhibitory category, the comparison deodorant has no inhibitory area and 0.01% gentamycin as a positive control has inhibitory area of 21.66 mm in the very strong category.Keywords: Ethyl acetate fraction, stick deodorant, Pluchea indica.L, Pseudomonas aeruginosa, Streptococcus pyogenes, inhibition test
Thermal and Kinetic Study of Fine Coal And Palm Kernel Shell Gasification Using TGA Analysis Dwipayana, Hendra; Faizal, Muhammad; Said, Muhammad; Hasanudin, Hasanudin
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 1 (2025): February 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v10.i1.49

Abstract

Indonesia is rich in natural resources, including coal and palm kernel shells (PKS), which can be used in the gasification process. This study compares the gasification potential of palm kernel shells and fine coal, focusing on their thermal properties and activation energy. Thermogravimetric Analysis (TGA) shows that PKS have higher volatile matter (67.25%) and lower fixed carbon (20.90%) than fine coal (33.53% volatile matter, 32.98% fixed carbon). at 450 °C, PKS lose 11% of their mass in one hour and reach a 78% loss by the end of the process, while fine coal loses 70% after more than 200 minutes. The activation energy for PKS is lower (38.925 J/mol) than fine coal (41.012 J/mol). In gasification, palm kernel shells produce more hydrogen (26% mol) and less carbon dioxide (11% mol) than fine coal, which produces more methane (28% mol) and carbon dioxide (22% mol). These results suggest that PKS are a more efficient and eco-friendly option for gasification.Keywords: Fine coal, palm kernel shells, activation energy, thermogravimetric analysis (TGA), gasification

Page 17 of 20 | Total Record : 196

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