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Jurnal Akademika Kimia
Published by Universitas Tadulako
ISSN : 24775185     EISSN : 23026030     DOI : -
Core Subject : Science, Education,
Chemistry Education
Jurnal Akademika Kimia is an electronic open-access journal that aims to publish the latest research results in the area of chemistry education and pure chemistry from academicians, professionals, and other practitioners at all levels of chemistry education. The journal coverage includes the following: current trends of professional chemistry education, educational technology, teacher education, educational science, learning assessment, learning models and development of learning materials, as well as pure chemistry including organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry, biochemistry and other chemistry fields such as environmental chemistry, that emphasis on a broad description of the general methods and processes for the synthesis, modification, and characterization of chemical materials.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 226 Documents
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Development of Social Media–Based Science Educational Content to Train Students’ Digital Literacy using ADDIE Model Rahman, Ranu A.; Dewi, Novi R.
Jurnal Akademika Kimia Vol. 14 No. 4 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i4.pp218-225

Abstract

This study aims to develop science educational content based on social media to enhance students' digital literacy. The development method used is the ADDIE model, which consists of the stages of Analysis, Design, Development, Implementation, and Evaluation. The subjects of this research were the students of class VIII D at SMP N 41 Semarang. The results showed that the developed science educational content met the criteria of feasibility and practicality based on expert validation, teacher responses, and student feedback. In addition, using social media as a platform for delivering educational content has been proven to enhance students' learning motivation and digital literacy skills. This research implies that science educational content based on social media can serve as an innovative alternative to learning and contribute to improving students' digital literacy.
The Effectiveness of Anti-Mosquito Aromatherapy Candles Formulated with Pine Leaf and Tuberose Flower Essential Oils Elvita, Febby A.; Nuryanti, Siti; Ahmar, Dewi S.; Ijirana, Ijirana; Ningsih, Purnama
Jurnal Akademika Kimia Vol. 14 No. 4 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i4.pp242-250

Abstract

The essential oil of tuberose flowers has a distinctive aroma that mosquitoes dislike and can kill insects, and it also contains eugenol, a beneficial antioxidant. Therefore, this essential oil is utilised in aromatherapy candles. Another essential oil with a distinctive aroma is pine needle oil. Its aroma can relieve cold symptoms and also repel mosquitoes. The objective of this research is to determine the characteristics and effectiveness of essential oil extracts from pine needles (Pinus merkusii) and tuberose flowers (Polianthes tuberosa L) as anti-mosquito aromatherapy candles. The research method used is true experimental. The samples used in this study are pine leaves and tuberose flowers. Fresh pine leaves are steam-distilled, while tuberose essential oil is commercially produced. Then, an evaluation stage of the aromatherapy candle preparation is conducted. The results of the therapeutic effect test on F1 and F4 show a feeling of relaxation and freshness. The percentage of mosquito mortality in formulations F0, F1, F2, F3, and F4 were 0%, 27%, 37%, 43%, and 53% respectively. From these formulations, it can be concluded that F0, F1, F2, and F3 are not effective at killing mosquitoes, as only F4 meets the lethal concentration 50 (LC50) criteria. This shows that in the F4 formulation, the essential oil content, consisting of eugenol and α-pinene, produces the highest mosquito mortality rate, and this combination has the potential to be used as an anti-mosquito aromatherapy wax.
Effectiveness of Biochar from Kapok Fruit Peel (Ceiba pentandra) for Decolorization of Indigosol Blue in Water Putra, Iim E.; Napitupulu, Mery; Walanda, Daud K.; Rahmawati, Sitti
Jurnal Akademika Kimia Vol. 14 No. 4 (2025)
Publisher : Universitas Tadulako

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

Abstract

In the batik industry, synthetic dyes such as indigosol blue are more commonly used than natural dyes. However, water pollution resulting from the batik industry is a serious issue that can threaten water quality and be harmful to human health. This research uses the adsorption method with kapok fruit peel as the adsorbent to address the problem of Indigosol blue dye. The kapok fruit peel is pyrolyzed at temperatures of 400 °C, 450 °C, and 500 °C. This study aims to determine the effectiveness of kapok fruit peel biochar in the adsorption of indigosol blue dye with variations in weight, time, and pH. The results show that the characteristics of kapok fruit shell biochar include moisture content at temperatures of 400 °C, 450 °C, and 500 °C, which are 7.40 %, 6.40 %, and 5.20 %, respectively. The ash content of kapok fruit shell biochar at temperatures of 400 °C, 450 °C, and 500 °C was 8.70 %, 6.10 %, and 5.40 %, respectively. The maximum weight of kapok fruit shell biochar in absorbingindigosol blue dye was 75 mg with an adsorption capacity of 0.986 mg/g. The maximum contact time required was 40 minutes with an adsorption capacity of 0.626 mg/g. The maximum pH of indigosol blue dye in the adsorption process occurred at pH 7 with an adsorption capacity of 1.709 mg/g. These findings indicate that kapok fruit shell biochar has potential as an environmentally friendly alternative adsorbent for treating batik industry wastewater.
Utilisation of Biochar from Kapok Randu (Ceiba pentandra) Branches for Decolourisation of Remazol Red in Water Dasi, Alfina D. A.; Napitupulu, Mery; Walanda, Daud K.; Rahmawati, Sitti
Jurnal Akademika Kimia Vol. 15 No. 1 (2026)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2026.v15.i1.pp1-8

Abstract

Synthetic dyes such as remazol red are commonly used in the batik process, but their residual waste is a major contributor to water pollution. These effluents can degrade water quality, damage aquatic ecosystems, and pose health risks to humans. This research aims to reduce these problems by using an adsorption method that utilises kapok randu branch as an adsorbent for remazol red dye. Kapok randu branches were pyrolysed at temperatures of 400 °C, 450 °C, and 500 °C. This study aims to measure the ability of biochar from kapok randu branches to adsorb remazol red dye under varying weight, time, and pH conditions. The results showed the characteristics of kapok randu branches biochar include moisture content of 400 °C, 450 °C and 500 °C biochar of kapok randu branches of 5.56 %, 5.01 % and 4.80 %, respectively. The ash content of the 400 °C, 450 °C, and 500 °C kapok randu branch biochar was 5.68 %, 6.66 %, and 7.24 %, respectively. The maximum weight of kapok randu branch biochar in adsorbing remazol red dye is 25 mg with an adsorption capacity of 0.312 mg/g. The maximum contact time required was 60 minutes with an adsorption capacity of 1.004 mg/g. The maximum pH for the remazol red dye during the adsorption process was at pH 4, with an adsorption capacity of 5.816 mg/g.
Analysis of Primary Metabolites Content in Ketapang Seed Tempe (Terminalia Catappa) Wulandari, Siska D.; Nuryanti, Siti; Tahril, Tahril; Aminah, Sitti
Jurnal Akademika Kimia Vol. 15 No. 1 (2026)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2026.v15.i1.pp9-16

Abstract

Ketapang seed tempeh (Terminalia catappa) is made from ketapang seed waste through a fermentation process using Rhizopus sp., as with soybean tempeh. This study used a quantitative descriptive method to determine the content of primary metabolites, including fat, protein, and carbohydrates. Laboratory analysis was conducted at the Chemistry Education Laboratory, Tadulako University, using the Soxhlet method for fat, the Kjeldahl method for protein, and the phenol-sulfur method for carbohydrates, as well as organoleptic tests by 15 panellists. The results showed that ketapang seed tempeh had very low fat content (0.1714%), low protein (0.0189 g per 100 g sample), and moderate carbohydrate (10.06%). Fried ketapang tempeh was preferred by the panellists, although its acceptance level was still lower than that of soybean tempeh. The novelty of this study lies in the quantitative evaluation of primary metabolites in tempeh made entirely from ketapang seeds, which has not been previously reported. These findings indicate that ketapang seeds have the potential to serve as an alternative ingredient in the production of low-fat tempeh.
Impact of Ferric Chloride–Induced Oxidation on the Physicochemical Characteristics of Chicken Fat and Its Biodiesel Maanari, Chaleb P.; Gugule, Sanusi; Fatimah, Feti; Rumengan, Stefan M.; Utami, Aisyiah R. P.; Mustapa, Mustapa; Sidabukke, Indah U. Br.
Jurnal Akademika Kimia Vol. 15 No. 1 (2026)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2026.v15.i1.pp17-24

Abstract

Background/problems: Biodiesel from animal fats is vulnerable to metal-catalyzed oxidation that degrades fuel quality because of the unsaturated fatty acid content. This study investigates the oxidative stability and physicochemical changes of chicken fat and its biodiesel upon FeCl₃-catalyzed oxidation. Methods: Chicken fat was transesterified to produce biodiesel; chicken fat (CF) and chicken-fat biodiesel (CF-BD) were then subjected to an FeCl₃ oxidative condition. Acid value (AV), iodine value (IV), peroxide value (PV), kinematic viscosity at 40 °C, and density were determined using standard titrimetric and physical methods; FTIR assessed spectral changes. ANOVA compared group means. Findings: Oxidation significantly increased AV and PV for both matrices, with a marked PV rise in CF-BD (6.17 ± 0.29 to 88.17 ± 5.35 meq/kg), and decreased IV (CF-BD 84.3 ± 4.51 to 48.7 ± 4.32 g I₂/100 g). Viscosity and density increased modestly. Visually, CF-BD shifted from clear yellow-green to brown and turbid with sediment, consistent with polymer formation and methyl-ester degradation. FTIR showed attenuation/shift of ester carbonyl and aliphatic bands. Conclusion: FeCl₃-induced oxidation measurably deteriorates CF-BD quality, breaching key limits in ASTM/SNI for acid value and viscosity. Impact: Results underscore the need to control trace metals and apply antioxidant/metal-deactivator strategies in storage and distribution, and validate the FeCl₃ assay as a practical accelerated-degradation model for stability and additive screening.

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