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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 100 Documents
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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.
Spectroscopic Evaluation and Analytical Validation of Lead (Pb) Determination in River Water Using Atomic Absorption Spectrophotometry Ainna, Rati Nur; Lotfi, Erik; Mitra, Amrita
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.v3i1.2965

Abstract

Purpose of the study: This study aims to determine the presence or absence of lead (Pb) in the Kelay River water and to quantify its concentration using atomic absorption spectrophotometry as a reliable analytical technique for environmental monitoring. Methodology: This study used atomic absorption spectrophotometry (Varian Spectr AA) for analysis. Supporting tools included analytical balance (KERN ALJ 220-4 NM), volumetric glassware (Pyrex), and electric heater. Methods involved judgment sampling, acid digestion using HNO3, preparation of Pb(NO3)2 standard solutions, calibration curve construction, and linear regression analysis. Main Findings: Lead (Pb) was detected in Kelay River water samples. The concentrations in samples D and E were 0.0773 mg/L and 0.0634 mg/L, respectively, exceeding acceptable limits. In contrast, samples A, B, and C showed concentrations below 0.01 mg/L. The calibration curve exhibited strong linearity with a high correlation coefficient. Novelty/Originality of this study: This study applies an analytical spectroscopy-based approach to determine lead (Pb) levels in a specific river system with consideration of local environmental characteristics. It integrates calibration and detection limit evaluation, contributing to improved analytical reliability and providing new data for environmental assessment in underreported regions.
Improving Chemical Bonding Conceptual Understanding Using STAD Cooperative Learning Assisted by Interactive Media Tang, Siong; Malalua, Lloyd Arvin
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.v2i2.2966

Abstract

Purpose of the study: This study aims to investigate the effectiveness of the Cooperative Learning model type STAD supported by interactive presentation media on students’ conceptual understanding of chemical bonding. Methodology: A quasi-experimental design with a non-equivalent control group was employed, involving two groups of secondary school students. The experimental group was taught using the STAD model integrated with interactive media, while the control group received conventional instruction. Data were collected through pre-test and post-test instruments, which were validated and tested for reliability. Main Findings: The results showed that the experimental group achieved a higher post-test mean score (82.13) compared to the control group (68.27), with an N-gain of 0.67 indicating medium–high improvement. Statistical analysis revealed a significant difference between the two groups (p < 0.05), confirming the effectiveness of the intervention. Novelty/Originality of this study: The novelty of this study lies in the integration of cooperative learning and interactive media with a specific focus on conceptual understanding in chemical bonding. These findings suggest that such an approach can significantly enhance students’ learning outcomes in chemistry education.
Guided Discovery Learning for Acid-Base Chemistry: Effects on Student Achievement and Conceptual Mastery Nurhayati, Heti; Mahalli, Majid Shabani
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.v3i1.2967

Abstract

Purpose of the study: This study aims to analyze the effect of guided discovery learning on students’ chemistry learning outcomes and conceptual understanding in acid-base topics, addressing challenges in mastering abstract chemical concepts through structured experimental activities. Methodology: A quasi-experimental design with a non-equivalent control group was employed. The experimental group received guided discovery learning integrated with laboratory activities, while the control group followed conventional instruction. Data were collected through pre-tests, post-tests, and observation sheets, and analyzed using descriptive statistics, independent sample t-tests, N-gain, and effect size (Cohen’s d) with SPSS software. Main Findings: Results show that the experimental group achieved higher post-test scores (Mean = 82.15, N-gain = 0.67) compared to the control group (Mean = 70.21, N-gain = 0.45), with a statistically significant difference (p = 0.001) and a large effect size (Cohen’s d = 0.82). Guided discovery learning effectively improves students’ conceptual understanding and overall chemistry learning outcomes. Novelty/Originality of this study: This study integrates guided discovery learning with systematically designed laboratory activities in acid-base instruction, providing a holistic evaluation of learning improvement. The approach connects theoretical concepts with practical experiences, offering a more effective instructional model and contributing new knowledge for enhancing chemistry education practices in secondary schools.
Development and Validation of Multimedia-Based Interactive Learning Media to Enhance Students’ Conceptual Understanding of the Periodic Table in Chemistry Education Saputra, Wahyu Arfian
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.v3i1.2968

Abstract

Purpose of the study: This study aims to develop and validate multimedia-based interactive learning media to enhance students’ conceptual understanding of the periodic table in chemistry education. Methodology: The research employed a Research and Development (R&D) approach using the ADDIE model, which includes analysis, design, development, implementation, and evaluation stages. The developed media integrates text, images, animations, and interactive features to facilitate meaningful learning experiences. Main Findings: The results of expert validation indicate that the media is highly valid, with an average score of 87.5% from media experts and 90.0% from subject matter experts. The implementation results show positive student responses, with an average score of 88.25%, indicating high levels of engagement and usability. Furthermore, the effectiveness test reveals a significant improvement in students’ conceptual understanding, as indicated by an increase in post-test scores and a moderate N-gain of 0.58. Novelty/Originality of this study: Novelty of this study lies in the integration of interactive multimedia features with a systematic validation process, specifically designed to address conceptual challenges in learning the periodic table. This study provides an innovative and empirically validated learning solution that contributes to improving the quality of chemistry education.

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