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 196 Documents
 3   4   5   6   7 
Bioremediation of Spent Bleaching Earth (SBE) Waste Using Lipolytic Fungi Riezkatama Menangcaye; Adipati Napoleon; Bambang Yudono
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 3, No 3 (2018): October 2018
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v3.i3.59

Abstract

The purpose of this research was to obtain the effectiveness level of bioremediation process of oil residue on SBE waste by using the isolates of lipolytic fungus Aspergilus fumigatus, Cylindrocladium sp and Fumago sp. This research was conducted by using completely randomized factorial design with 3 factors of treatment which consist of nutrient ratio (N:P:K) that were divided into three levels, namely n1=A(7:1.5:0.5), n2=B(14:3:1), n3=C(21:6:1.5). The humidity were divided into 3 levels treatment i.e. k1 (90%), k2 (80%), k3 (70%) and time that were divided into four levels, namely w1 (week 1), w2 (week 2), w3 (week 3), and w4 (week 4) with fixed pH i.e. pH 6, so that were obtained 36 combination of treatment and for each treatment combination repeated 3 times. Sampling of SBE waste was conducted in one cooking oil factory in South Sumatera using randomized sampling method as much as 24.000 g. The results showed that 80% humidity and nutrient A as the best treatment for lipolytic fungus consortium performance to degrade the SBE waste with the average percentage of oil degradation as much as 74.83%. 80% humidity and nutrient A was an effective interaction in affecting the percentage of oil degradation.
Effect of DC Voltage on Prototype of Biodiesel Electrostatic Separator with Glycerin from Waste Cooking Oil Jaya Utama Putra; Leila Kalsum; Yohandri Bow
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 3, No 3 (2018): October 2018
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v3.i3.89

Abstract

The limitations of fossil fuel support on fulfillment of energy need in a sustainable and environment friendly fashion has drove society to efforts of finding and developing fresh and renewably resources. Biodiesel is one the renewable energy resource and shows environment friendly property, consist of alkyl of fatty acids monoester originated from vegetable oil or animal fat.One of important steps in biodiesel production is separation of glycerin from product. Electrostatic method has been proved in accelerating saturation of glycerin. However, several aspects still need a careful assessment to acquire biodiesel production process with standard quality assigned. In this work, we designed an electrostatic separator of biodiesel from glycerin using waste cooking oil feed. The prototype was tested in several different voltages 12 Vdc, 20 Vdc, 30 Vdc and 33.5 Vdc. The result shows the highest voltage obtained is 33.5 Vdc, separation time 2 minutes 10 seconds having viscosity, water content and density i.e. 7.2139 cSt, 0.0321% and 0.85 g/mL respectively whereas flash point increase to 1917 C. The data confirmed that the product fulfills required standard value fordensity, water content and flash point.
Indigen Bacteria from Spent Bleaching Earth Waste as A Removal Agent of Fe and Cu Inike Fratiwi; A Napoleon; Hary Widjayanti
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 3, No 3 (2018): October 2018
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v3.i3.66

Abstract

The most pollution produced by oil palm factory is Spent Bleaching Earth, because the waste contains residue of oil and dangerous metal that enable bacteria to live hence the research was done to get bacteria of Fe and Cu metal as bioremoval agent. Waste sampling method is random sampling, then purification, selection and potency test. Bacteria that pass potency test on metal containing media are identified and characterized by their genus. The result of the research indicated that the indigenous bacteria genus for good accumulation of Fe metal is Salmonella sp (B7) and for Cu metal is Escherichia sp (B1).
Land Revegetation Post Clay Mine PT Semen Baturaja (Persero) Tbk in OKU Selatan District "Challenges for Environmental Sustainability" Marwan Sastradinata
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 3, No 3 (2018): October 2018
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v3.i3.94

Abstract

Clay as a non-renewable natural resource causes the number of reserves to be a limiting factor for mine age. The post-mining plan is prepared as an effort to restore the physical and environmental conditions that are disturbed by mining. Data collection was carried out with location surveys, literature studies, and institutional coordination. Mine reserves are known to be 36 million tons with a thickness of up to 25 m. The clay chemical composition consisted of SiO2 12.77% -92.49%, Al2O3 2.95% -27.64% and Fe2O3 0.53% -29.46%. The environment disturbed by post-mining will be managed with 39.5 ha of plantation designation, 13.5 ha of forestry and 1.7 ha of water treatment. Natural vegetation consists of secondary forests, shrubs, resident gardens. The diversity index value of the bush species of 2.940 is dominated by 15 plant species. Distribution of evenly distributed plants such as medang, aro wood, krinjing. Vegetation of cultivated plants is dominated by 10 types of plants such as coffee, pepper, rubber. Revegetation stage in the form of cover crop sowing, nurseries and the development of fast-growing plants. Post-mining revegetation uses plants that have suitable soil conditions so that environmental improvements and environmental sustainability of clay mines are achieved. 
Biodiesel Production from Waste Cooking Oil Endang Sri Rahadianti; Yerizam Yerizam; Martha Martha
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 3, No 3 (2018): October 2018
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v3.i3.77

Abstract

Increased energy consumption and the depletion of petroleum reserves have pushed up oil prices globally. The diminishing petroleum reserves are a problem inherent in this type of fossil energy. One alternative energy source that has the potential to be developed in Indonesia is biodiesel. Used cooking oil or used cooking oil is a potential raw material for making biodiesel. In this study biodiesel was made from used cooking oil and methanol using the transesterification method with KOH catalyst. The production of biodiesel from used cooking oil begins with mixing raw materials of used cooking oil collected into one. The mixture is then precipitated for 24 hours. The transesterification process was carried out by mixing KOH (1% of oil weight) with methanol (ratioof methanol: oil 6: 1) at a temperature of 65 oC. After the temperature is reached, the methanol and KOH solution is added slowly while pumping (stirring), with a variation of time 30, 45, 60.75 and 90 minutes. Biodiesel purification is done by washing using hot water (temperature 70 C) twice as much washing. Characteristics of biodiesel based on the best conditions for density 0.886 g / mL, viscosity 5.89 cSt, FFA 0.11% , acid value 0.256 mgKOH/g and flash point 170.52 oC. The biodiesel products based on these parameters meet SNI 7182-2015 standards.
Biodiesel Production from Waste Cooking Oil using Electrostatic Method Susumu Susumu; Rusdianasari Rusdianasari; Syahirman Yusi
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 3, No 3 (2018): October 2018
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v3.i3.71

Abstract

Biodiesel (methyl ester) produced from trans esterification of waste cooking oil is a potential material to replace diesel fuel. The biodiesel can be obtained by using electrostatic method equipped with fixed distance electrode 1.5 cm and voltage at 12 volts. Coagulation of particle process i.e. glycerin drops in biodieselglycerinmixture was based on electrical field. Reactants used were methanol over KOH catalyst and temperature was set at 60 C. The residence time was varied as well as methanol to waste cooking oil ratio. Analysis result shows the process was able to obtain yield up to 83.3%. The quality of biodiesel produced was tested and satisfy the requirement according to National Standard of Indonesia (SNI), i.e. density 0.8594 mg/mL (compared to SNI: 0.85-0.90 mg/mL), flash point 191 C (SNI min 100 C), water content 0.0342% (SNI max 0.05%) and viscosity at lower limit 2.31 cSt. According to SNI 7182-2015 the above value meets the specified standard.
Purification of Crude Glycerol from Biodiesel By-product by Adsorption using Bentonite Erniati Anzar; M. Syahirman Yusi; Yohandri Bow
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 3, No 3 (2018): October 2018
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v3.i3.83

Abstract

The production of glycerol from biodiesel by-product that was obtained from waste cooking oil has low purity. This crude glycerol contains impurities such as methanol, catalyst, soap and water. Analysis result shows that crude glycerol contains 67.7% water, 16.7% ash with density 1.1217 g/mL. The impurities were able to be adsorbed using bentonite which was activated in sulphuric acids 1.5 M and characterized by SEM-EDX. The purified glycerol after being treated with bentonite at 60 C for 75 minutes was fulfilled The SNI 06-1564-1995 requirement i.e. 89.5% glycerol, 4.3% water, 3.6% ash and density 1.2212 g/mL. From the experiment can be concluded the activated bentonite showed a capacity in adsorbing and removing impurities in waste cooking oil.
Analysis of Biodiesel Conversion on Raw Material Variation Using Statistical Process Control Method Winny Andalia; Irnanda Pratiwi; Susila Arita
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 4, No 1 (2019): February 2019
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v4.i1.35

Abstract

Biodiesel is a alternative fuel that can be obtained from vegetable oils or animal fats through transesterification reactions with alcohol. Biodiesel has numerous advantages compared to diesel oil, namely: it is a renewable energy resource, it is not toxic, and it is environmentally friendly because the raw material does not contain sulfur and low emissions. Biodiesel production is inseparable from the availability of raw materials, until now the raw materials that meet the needs of production capacity are palm oil (CPO). To overcome this problem, in this study we want to find out how much biodiesel conversion percentage if we use other raw materials such as: CPO oil, corn oil, VCO oil, and waste cooking oil. The analysis used in this study was the analysis of the use of raw materials to the value of biodiesel conversion using the Stastical Process Control (SPC) method. SPC method was used to analyze, manage, control, and improve a product and process using statistics. The objective of this study was to produce high conversion percentage biodiesel, and analyze and control the quality of research products. By having this statistical methods, it could be found errors in a study or out of control production so that further action can be taken to overcome them. In this study, it was found that the product which was outside of the control limit was biodiesel made from CPO and waste cooking oil. The results of the analysis using cause and effect diagrams could determine the causes of damage in the production process, which come from the factors of workers/humans, production machines, working methods, materials/raw materials and work environment. 
Studies on the Controlled Release of Drugs from Magnetic Nanobiocomposites Thomas Heinze; Robert Müller; Mengbo Zhou; Martin Rabel; Paul Warncke; Dagmar Fischer
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 4, No 1 (2019): February 2019
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v4.i1.1

Abstract

Magnetic nanocomposites are a class of smart materials that have attracted recent interest as drug delivery systems or as medical implants. In this study, meltable nanobiocomposites (NBC) composed of biocompatible dextran fatty acid ester and magnetic nanoparticles (MNPs) melting close to human body temperature were prepared and loaded with Rhodamine B (RhB) or green fluorescent protein (GFP) as model drugs to evaluate their potential use as drug delivery system. The release of the model drugs from the magnetic NBC investigated under the influence of a high frequent alternating magnetic field (AMF, 20 kA/m at 400 kHz) showed that on-demand release is realized applying the external AMF. The NBC showed a long-term stability (28 d) of the incorporated iron oxide particles after incubation in artificial body fluids. This work reveals the potential of the NBC as a drug carrier.
Performance of Silica Membranes from Fly Ash Coal of PT Semen Baturaja in Reducing Metal Content in Mine Acid Water Lety Trisnaliani; Indah Purnamasari; Fatria Ahmadan
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 4, No 1 (2019): February 2019
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v4.i1.09

Abstract

Mine acid water has a high level of acidity as a result of oxidation of rocks containing pyrite and sulfide minerals from the remains of rocks exposed to oxygen in the water, which usually contain high metal content. One way to reduce the metal content in acid mine water is to use a silica membrane. In the study, silica membranes were made by extracting silica from fly ash by using two types of solvents or extractors, namely HCl and HNO3.  The adsorption time are 100 minutes, 120 minutes, and 140 minutes with the aim to find out which extractors can produce membranes with performance good and optimum time in the absorption of metal content from acid mine drainage. SEM analysis shows that there is no pore formed on the membrane. Based on the results of the analysis of the research conducted, it can be seen that the membrane with HCl extractor can work better in reducing metal content with optimum adsorption time in the 140th minute. Acid mine drainage also experienced a decrease in flux from 14.9283 L / m2 hours to 6.8244 L / m2h for the membrane with HCl extractor and for HNO3 membrane decreased from 11.9427 L / m2h to 7.6774 L / m2h. Keywords: Silica Membranes, Fly Ash Coal, Metal Content, Mine Acid Water, extractor 

Page 5 of 20 | Total Record : 196

 3   4   5   6   7 

Filter by Year

2016 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