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Journal of Chemical Learning Innovation
Published by Cahaya Ilmu Cendekia Publisher
ISSN : 30631629     EISSN : 30630886     DOI : https://doi.org/10.37251/jocli
Core Subject : Science, Education, Social,
Chemistry Education Social Sciences Other
Journal of Chemical Learning Innovation is a double-blind peer-reviewed journal dedicated to disseminating advances in science and research in chemistry, both in Indonesia and in the global context of developing countries. Committed to achieving excellence, Jurnal Inovasi Pembelajaran Kimia publishes comprehensive research articles and invited reviews from leading experts in the fields of chemistry education and chemistry research. The selection criteria prioritize papers that demonstrate high scientific value, convey new knowledge, and have a significant impact on chemistry education and research. The journal focuses on evaluation, chemistry teaching and learning, pure chemistry research, EthnoChemistry, TIMSS Tasks, and related topics at the school and college levels.
Arjuna Subject : Umum - Umum
Articles 44 Documents
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The Effectiveness of the Jigsaw Learning Model in Improving Students’ Learning Outcomes in Carbon Chemistry Wijayanti, Theresia Ita; Field, Steven J; Rashedy, Khawla
Journal of Chemical Learning Innovation Vol. 2 No. 2 (2025): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jocli.v2i2.2583

Abstract

Purpose of the study: This study aims to examine the effectiveness of the Jigsaw cooperative learning model in improving students’ learning outcomes and learning motivation in carbon chemistry at the secondary school level through a classroom-based instructional intervention. Methodology: This study employed classroom action research with three instructional cycles. The Jigsaw cooperative learning model was implemented using lesson plans and student worksheets. Data were collected through achievement tests, observation sheets, motivation questionnaires, and attitude questionnaires. Descriptive quantitative analysis was conducted using Microsoft Excel. Main Findings: The results show a consistent improvement in students’ learning outcomes across three cycles, indicated by increased average scores, mastery levels, and absorption rates. Students’ affective aspects and learning motivation also improved, with most students reaching moderate to high motivation levels and showing more positive attitudes toward chemistry learning. Novelty/Originality of this study: This study provides new empirical evidence on the integrated impact of the Jigsaw learning model on cognitive, affective, and motivational aspects in carbon chemistry. Unlike previous studies focusing mainly on achievement, this research highlights how structured peer collaboration enhances conceptual understanding and learning motivation in abstract chemistry topics.
The Effect of Flash-Based Learning Media on Students’ Achievement in Learning Atomic Structure in Kenyan Senior High Schools Khamali, Jairus Bulimo; Mondoh, Helen Omondi
Journal of Chemical Learning Innovation Vol. 2 No. 2 (2025): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jocli.v2i2.2584

Abstract

Purpose of the study: This study aims to investigate the effect of Flash-based learning media on students’ learning achievement in chemistry, particularly on the topic of atomic structure, in Kenyan senior high schools. Methodology: The study employed a quasi-experimental research design using a pretest–posttest control group approach. The participants consisted of 84 Grade 10 students from a public senior high school in Kenya, divided into an experimental group and a control group. The experimental group was taught using Flash-based learning media featuring animated visualizations of atomic models, subatomic particles, and electron configurations, while the control group received conventional instruction. Data were collected using a validated chemistry achievement test and analyzed using an independent samples t-test. Main Findings: The results showed that students who learned using Flash-based media achieved significantly higher posttest scores than those taught using conventional methods. The statistical analysis revealed a significant difference between the experimental and control groups (t = 3.24, p < 0.05), indicating that Flash-based learning media had a positive effect on students’ achievement in learning atomic structure. Novelty/Originality of this study: This study provides empirical evidence on the effectiveness of Flash-based learning media in chemistry education within the Kenyan context, which remains underexplored. The findings highlight the potential of interactive multimedia to enhance students’ conceptual understanding of abstract chemistry topics and support the integration of digital learning media in secondary science education in developing countries.
Evaluation of Chemical Health and Safety Management Using Task Risk Assessment in an Academic Chemical Process Laboratory Wongpromrat, Wichitra; Sinin, Ermieza; Santiago-Sanchez, Denise Ester
Journal of Chemical Learning Innovation Vol. 2 No. 2 (2025): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jocli.v2i2.2707

Abstract

Purpose of the study: This study aims to evaluate the implementation of a chemical health and safety management system in an academic chemical process laboratory by identifying chemical and process-related hazards, assessing task-related risks, and examining the adequacy of existing safety control measures in preventing chemical exposure and health risks. Methodology: This study used a descriptive observational design. Tools included a structured laboratory safety checklist and a Task Risk Assessment matrix. Methods involved direct observation, document review, and semi-structured interviews. Reference standards included occupational safety and chemical health management principles. Data were analyzed qualitatively using risk categorization without specialized software. Main Findings: Laboratory activities involved chemical, mechanical, thermal, electrical, and housekeeping hazards. Task Risk Assessment results indicated low, medium, and high-risk tasks, with high-risk activities predominantly associated with chemical exposure during handling and storage, as well as process-related hazards involving heated, pressurized, or moving equipment. Although engineering, administrative, and personal protective equipment controls were available, their implementation was inconsistent and not always aligned with the identified chemical health risks. Overall, the implementation of chemical health and safety management was partially aligned with recognized safety management principles. Novelty/Originality of this study: This study provides task-level empirical evidence on chemical health and safety management in an academic chemical process laboratory and contributes to chemical health risk prevention by demonstrating how Task Risk Assessment can be applied to identify, prioritize, and control chemical exposure and process-related hazards in higher education laboratory environments.
Quantitative Evaluation of Oxidation Time, Dilute Acid Concentration and Acid Type on Indigo Yield from Indigofera Leaves: An Ethnochemical Approach to Sustainable Batik Dyeing Mualimin, Amar; Kimleang, Khoeurn; Jo, Hyung Jun
Journal of Chemical Learning Innovation Vol. 2 No. 2 (2025): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jocli.v2i2.2845

Abstract

Purpose of the study: This study aims to analyze the effect of oxidation time, dilute acid concentration, and type of acid on the indigo content produced, as well as to determine the effect of the color-covering agent (mordant) on the color quality of batik cloth using natural dyes from the indigo plant (Indigofera). Methodology: Analytical balance (Ohaus Pioneer), Pyrex beaker glass and volumetric flask, aeration system with Resun LP-40 air pump, pH indicator strips (Merck), and UV-Vis spectrophotometer (Shimadzu UV-1800) were used. Experimental laboratory method with oxidation-time and acid-variation design was applied. Data were processed using Microsoft Excel 2019 and SPSS 25. Literature review and observational approach supported analysis. Main Findings: Indigo content increased with longer oxidation time, reaching 23.78 ppm at 12 hours. The optimal acid concentration was 0.01 M HCl (26.88 ppm), while 0.1 M significantly reduced yield (15.77 ppm). Sulfuric acid 0.01 M produced the highest indigo level (29.20 ppm). Mordant variation affected color quality: tunjung produced darker bluish-green tones, lime produced lighter blue, and alum maintained the original blue shade. Novelty/Originality of this study: This study integrates ethnochemical perspectives with quantitative chemical analysis by systematically examining oxidation time, dilute acid concentration, acid type, and mordant effects within a traditional Indigofera-based batik framework. It advances knowledge by scientifically validating indigenous dyeing practices while providing measurable parameters to optimize natural indigo production and improve sustainable textile applications.
Photocatalytic Degradation of Congo Red Textile Dye in Aqueous Solution Using TiO₂ Suspension Ogbunude, Patrick Okafor James; Souza, Jaime; Khanenko, Alla
Journal of Chemical Learning Innovation Vol. 2 No. 2 (2025): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jocli.v2i2.2930

Abstract

Purpose of the study: This study aims to investigate the photocatalytic degradation of Congo Red dye using TiO₂ suspension. It focuses on evaluating the effect of process conditions on degradation efficiency, examining the reaction kinetics of photodegradation, and analyzing the degradation behavior of Congo Red in aqueous solution. Methodology: Photocatalytic experiments were conducted using TiO₂ catalyst suspension and Congo Red solution. UV-C lamp (36 W) was used as radiation source in a photocatalytic reactor. Absorbance was measured using a UV–Vis spectrophotometer at 499 nm. COD was determined by closed reflux titrimetric method using K₂Cr₂O₇, Ag₂SO₄, H₂SO₄, FAS, and ferroin indicator. Mixing employed a magnetic stirrer and pH meter. Main Findings: TiO₂ photocatalysis successfully degraded Congo Red dye under UV irradiation. The optimum catalyst amount was 4.5 mg TiO₂ and the optimum irradiation time was 150 minutes. Under these conditions, degradation efficiency of Congo Red (20 ppm) reached 48.90%. COD reduction reached 84.1%, indicating significant removal of organic compounds. Increasing dye concentration decreased degradation efficiency due to higher pollutant load in the system. Novelty/Originality of this study: This study provides a systematic evaluation of photocatalytic degradation of Congo Red using TiO₂ suspension by analyzing the effects of catalyst amount, irradiation time, and dye concentration. It integrates absorbance and COD analyses to evaluate degradation efficiency, offering a clearer understanding of photocatalytic performance for textile dye wastewater treatment.
Evaluation of Chemical Health and Safety Practices and Exposure Risks in Undergraduate Chemistry Laboratory Practicum Ulfah, Mutiah; Morozov, Vladimir; Dabera, Dinesha
Journal of Chemical Learning Innovation Vol. 2 No. 2 (2025): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jocli.v2i2.2943

Abstract

Purpose of the study: This study aims to evaluate the implementation of chemical health and safety practices in undergraduate chemistry laboratory practicum by focusing on chemical hazard identification and exposure risk assessment associated with laboratory activities involving hazardous substances. Methodology: The research employed a descriptive observational design using a structured chemical safety checklist and a task-based risk assessment approach. The evaluation considered chemical properties such as toxicity, flammability, and corrosivity, as well as potential exposure pathways including inhalation, dermal contact, and accidental ingestion. Laboratory activities were analyzed based on the likelihood of exposure and the severity of potential health impacts to determine risk levels. Main Findings: The results indicate that, although overall safety practices were categorized as acceptable, several laboratory activities involving hazardous chemicals such as nitric acid, sulfuric acid, and benzene present significant chemical exposure risks. High-risk conditions were mainly associated with improper handling of corrosive and flammable substances and inconsistent use of personal protective equipment. These conditions suggest the presence of both acute exposure risks, including chemical burns and irritation, and potential chronic health risks due to repeated low-level exposure in laboratory environments. Novelty/Originality of this study: This study contributes to chemical health risk prevention by integrating chemical hazard characteristics and exposure pathways into a task-based risk assessment framework in an academic laboratory setting. Unlike previous studies that primarily focus on general safety practices, this research emphasizes exposure-based chemical health risk evaluation, providing a more comprehensive approach to improving chemical safety management in chemistry laboratory education.
Performance of Hybrid Coagulation–Adsorption as a Physicochemical Separation Process for Removal of Organic Pollutants and Heavy Metals from Chemical Laboratory Wastewater Dong, Gang; Sinin, Ermieza; Mallouh, Fahad Abu
Journal of Chemical Learning Innovation Vol. 2 No. 2 (2025): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jocli.v2i2.2945

Abstract

Purpose of the study: This study aims to evaluate the performance of a hybrid coagulation and adsorption system as a physicochemical separation process for removing organic pollutants and heavy metals such as iron, manganese, and chromium from chemical laboratory wastewater, as well as to determine optimum operating conditions to improve separation efficiency. Methodology: The study used a batch experimental method consisting of coagulation followed by adsorption. Coagulation was carried out using aluminum sulfate, polyaluminum chloride, and commercial coagulants under controlled conditions of acidity, dosage, and mixing to promote particle destabilization and floc formation. The adsorption process used activated carbon and zeolite with controlled contact time and adsorbent dosage. Parameters analyzed included turbidity, total suspended solids, total dissolved solids, electrical conductivity, chemical oxygen demand, and metal concentrations. Main Findings: The coagulation process significantly improved solid–liquid separation, achieving reductions in turbidity (93.5%), Total Suspended Solids (69.13%), Total Dissolved Solids (46.95%), conductivity (72.33%), and heavy metals, including Fe (85.53%), Mn (55.84%), and Cr (43.07%). However, Chemical Oxygen Demand reduction during coagulation was limited (7.4%), indicating low removal of dissolved organic compounds. The subsequent adsorption stage enhanced Chemical Oxygen Demand removal up to 58.53% using activated carbon and 54.61% using zeolite. Novelty/Originality of this study: This study evaluates a hybrid coagulation and adsorption system as a multi-stage physicochemical separation process for complex laboratory wastewater. The novelty lies in integrating bulk separation and surface-based removal to improve overall performance and reveal process interactions affecting pollutant removal.
Comparative Spectral Sensitivity and Quantitative Accuracy of X-ray Fluorescence and Optical Emission Spectroscopy for Alloy Steel Characterization Nowaczyk, Kazimierz; Putra, Risky Hidayat Santoso; Pataki, Piroska
Journal of Chemical Learning Innovation Vol. 2 No. 2 (2025): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jocli.v2i2.2946

Abstract

Purpose of the study: This study aims to evaluate and compare the spectral sensitivity, detection capability, and quantitative accuracy of X-ray fluorescence and optical emission spectroscopy in determining the elemental composition of alloy steel. Methodology: X-ray fluorescence analysis was conducted using Niton XL2 GOLDD (Thermo Scientific), while optical emission spectroscopy analysis employed ARC Met 8000 (Oxford Instruments). Samples included stainless steel (SS-304, SS-310), alloy steel (17-4PH), and duplex steel (Zeron 100). Calibration was performed using Analytical Reference Materials International standards. Data analysis included averaging repeated measurements, relative error calculation, and comparative evaluation using Microsoft Excel and Origin software. Main Findings: Optical emission spectroscopy demonstrated higher spectral sensitivity, particularly for light elements such as carbon, while X-ray fluorescence provided rapid multi-element detection with acceptable accuracy. Relative deviations between methods varied across elements, with significant discrepancies observed in nickel measurements due to matrix effects and detection limitations. Novelty/Originality of this study: This study introduces a comparative spectral performance analysis of X-ray fluorescence and optical emission spectroscopy, emphasizing matrix-effect-driven deviations and highlighting the nickel (Ni) anomaly as a key spectroscopic case. The work provides deeper insight into the influence of spectral interactions on analytical accuracy in complex alloy systems.
Filtration Behavior and Solid–Liquid Separation Mechanisms in an Integrated Electrocoagulation–Filtration–Chelation System for Heavy Metal Removal from Laboratory Wastewater Cafarov, Rasul; Hameda, Hameda; Fadhilah, Rahayu Yuliastri; Konstantinidis, Emmanouil
Journal of Chemical Learning Innovation Vol. 3 No. 1 (2026): June
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jocli.v3i1.2962

Abstract

Purpose of the study: This study aims to investigate the filtration behavior and solid–liquid separation mechanisms in an integrated electrocoagulation–filtration–chelation system for treating highly contaminated laboratory wastewater, with emphasis on the role of filtration as the main separation unit controlling overall treatment performance. Methodology: Electrocoagulation was conducted using aluminum electrodes in a batch reactor, followed by gravity-driven filtration using cellulose filter media and chelation using tamarind extract. Heavy metals were analyzed using Atomic Absorption Spectroscopy (AAS, Shimadzu AA-7000). COD was measured using standard dichromate method. Filtration behavior was interpreted using classical Darcy’s law. Main Findings: The integrated system achieved significant removal of heavy metals, with mercury reduced to 0.001 ppm, cadmium to 0.002 ppm, and lead to 0.123 ppm. COD was also substantially decreased. Filtration exhibited cake formation behavior, where floc accumulation increased resistance and reduced flux over time, while improving solid–liquid separation efficiency. Novelty/Originality of this study: This study introduces a filtration-centered perspective in an integrated electrocoagulation–filtration–chelation system by emphasizing cake filtration mechanisms and resistance-controlled behavior. It advances existing knowledge by linking physicochemical transformation with mechanical separation, demonstrating how phase conversion enhances filterability and overall separation efficiency in wastewater treatment systems.
Phytochemical Investigation of Mastigophora diclados: Isolation of a Herbertene-Type Sesquiterpenoid Ardiansyah, Ferry Indar; Tlali, Moeketsi Freddie
Journal of Chemical Learning Innovation Vol. 2 No. 2 (2025): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jocli.v2i2.2963

Abstract

Purpose of the study: This study aims to isolate and characterize secondary metabolite compounds from the ethyl acetate extract of the liverwort Mastigophora diclados collected in Indonesia using chromatographic separation and spectroscopic analysis. Methodology: This study employed an experimental laboratory design using maceration extraction with n-hexane and ethyl acetate. Isolation was conducted using column chromatography and thin-layer chromatography (silica gel 60 GF254). Instruments included rotary evaporator (Eyela N-1000), water bath (Eyela SB-1000), and ¹H-NMR spectrometer (JEOL 500 MHz). Data were analyzed through spectral comparison and phytochemical screening methods. Main Findings: The ethyl acetate extract yielded 41.78 g (1.98%). Phytochemical screening indicated the presence of terpenoids. Two pure compounds were obtained (III-B: 8 mg; IV-B: 4 mg) with Rf 0.44. Compound III-B showed a melting point of 152–154 °C. ¹H-NMR analysis revealed characteristic signals of four methyl groups and olefinic protons, indicating a herbertene-type sesquiterpenoid structure. Novelty/Originality of this study: This study is the first to report the isolation and structural characterization of secondary metabolites from Indonesian Mastigophora diclados. It reveals a herbertene-like compound with slight spectral variations, suggesting a potential new derivative influenced by geographical factors, thereby contributing to bryophyte chemotaxonomy and expanding natural product research in tropical regions.

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