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JKPK (Jurnal Kimia dan Pendidikan Kimia)
Published by Universitas Sebelas Maret
ISSN : 25034146     EISSN : 25034154     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
The JKPK (Jurnal Kimia dan Pendidikan Kimia) is a national journal, published three times a year in April, August, and December, containing research articles on Chemistry and Chemistry education.
Arjuna Subject : -
Articles 122 Documents
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Development of PjBL–ESD E-Module to Improve Disaster Literacy for Higher Education Students Herdini Herdini; Abdullah Abdullah; Erviyenni Erviyenni; Betty Holiwarni; Putri Adita Wulandari; Siti Nazhifah; Tiara Swastika Putri
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 11, No 1 (2026): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v11i1.115576

Abstract

The relatively low level of students’ disaster literacy indicates that disaster education in higher education has not yet been optimally implemented, particularly due to lecturer-centered approaches, limited contextual learning, and insufficient use of digital learning resources. This study aimed to develop and evaluate the validity, practicality, and preliminary effectiveness of an e-module based on Project-Based Learning integrated with Education for Sustainable Development (PjBL–ESD) to enhance students’ disaster literacy. This study employed a Research and Development (R&D) method using the 4-D model. The validity of the e-module was assessed through expert review covering content, media, and pedagogical aspects. Practicality was evaluated through questionnaires administered to lecturers and students, focusing on ease of access, time efficiency, and ease of use. The preliminary effectiveness test involved a one-group pretest–posttest design analyzed using a paired-sample t-test. The effectiveness test involved 38 students enrolled in the Environmental Science and Disaster Mitigation course. The results showed that the PjBL–ESD e-module achieved a very high level of validity (≥96%) and demonstrated excellent practicality, with average scores of 98.40% from lecturers and 98.54% from students. The effectiveness test indicated a statistically significant improvement in disaster literacy, with the mean score increasing from 49.14 (pretest) to 81.74 (posttest) (p < 0.05). These results suggest that the PjBL–ESD e-module is valid, practical, and has strong potential to improve students’ disaster literacy within the context of this study. However, the lack of a control group inherent in the one-group pretest–posttest design constrains the extent to which causal conclusions can be drawn. This study implies that the integration of PjBL and ESD in digital modules can support more contextual and student-centered learning, particularly for disaster mitigation education in higher education.
GC-MS and ADMET Profiling of Bruguiera gymnorrhiza Mangrove Leaf Extract Origin Sulawesi with Antioxidant Properties Wendy Alexander Tanod; Didit Kustantio Dewanto; Eko Cahyono; Frets Jonas Rieuwpassa; Novalina Maya Sari Ansar; Yana Sambeka; Frans Gruber Ijong; Jefri Anthonius Mandeno; Obyn Imhart Pumpente; Meilya Suzan Triyastuti
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 1 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i1.100362

Abstract

Mangrove plants, particularly Bruguiera gymnorrhiza, are recognized as sources of bioactive compounds. This study analyzed the chemical profiles, safety, and antioxidant activity of B. gymnorrhiza leaf extract origin Sulawesi, a biodiversity-rich Wallacean region. Research on B. gymnorrhiza leaves from Sulawesi remains scarce. GC-MS analysis identified inositol, fatty acid, ester, and terpenoid derivatives as major chemical profiles related to stress tolerance and remedial properties. ADMET predictions showed good intestinal absorption but suggested potential hepatotoxicity at high doses. Brine shrimp lethality tests revealed low acute toxicity with an LD₅₀ of 873.381 µg/mL, supporting in silico findings. The extract exhibited strong antioxidant activity (IC₅₀ 49.78 µg/mL), comparable to Vitamin E, and higher than reports from other regions. These results indicate that Sulawesi mangroves store valuable chemical compounds and serve as environmental health indicators. Combining chemical profiling, computational prediction, and experimental validation highlights their pharmaceutical potential while emphasizing the need for careful dose optimization and ecological monitoring. This study reinforces the importance of conserving Wallacean biodiversity and offers a foundation for safe, natural antioxidant commercialization. Future work should assess in vivo effectiveness, long-term toxicity, and the ecological impacts of pollutant immobilization in mangrove ecosystems.
Analysis of General Chemistry Textbooks Based on Multiple Representations of the Cell Potential Concept Annisa Shafira Muntaha; Wiji Wiji; Tuszie Widhiyanti; Sri Mulyani
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 2 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i2.99745

Abstract

Textbooks function as core learning resources in chemistry, particularly for explaining abstract ideas through visual representations. This study examines how the concept of electrochemical potential cells is represented in five college level general chemistry textbooks using five analytic criteria covering representation type, explicitness, connectedness, information sufficiency, and conceptual relatedness. The sample comprises widely adopted texts that span foundational topics to ensure relevance across common curricula. The analysis identified a distinct pattern within each category. Category C1 was dominated by symbolic representations at 74.7 percent. Category C2 showed predominantly explicit presentations at 79.3 percent. Category C3 reflected fully related and connected representations. Category C4 demonstrated complete presence of appropriate information at 100 percent. Category C5 included three levels of conceptual relatedness with quite related at 74.2 percent, not quite related at 19.4 percent, and not related at 6.5 percent. The findings outline the current quality of visual representations of potential cells in higher education materials and indicate areas where integration across macroscopic, submicroscopic, and symbolic levels could be strengthened. Educators, textbook authors, and curriculum developers can apply these insights to design materials that support deeper conceptual understanding and more coherent transitions between representations. 
Safer and Sustainable Co-precipitation Synthesis of NCA (LiNi0.80Co0.15Al0.05O2) Cathodes: Eliminating Ammonia in Favor of NaOH for pH Control Shofirul Sholikhatun Nisa; Meidiana Arinawati; Cornelius Satria Yudha; Anisa Raditya Nurohmah
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 3 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i3.108184

Abstract

Developing safer and more sustainable synthesis routes for lithium ion battery cathodes is important for both environmental practice and laboratory education. This study reports an ammonia free oxalate coprecipitation route to synthesize LiNi0.80Co0.15Al0.05O2 (NCA), in which ammonia as the usual pH controller was fully replaced by sodium hydroxide (NaOH). NaOH dosage was varied at 20 g, 40 g, 60 g, and 80 g to control precipitation, precursor quality, and the properties of the final cathode after calcination and sintering. X ray diffraction confirmed formation of a layered α NaFeO2 type structure with R3m symmetry for all samples without detectable secondary phases. The 40 g NaOH condition showed the best structural ordering, reflected by a relatively high I(003)/I(104) intensity ratio associated with reduced cation mixing. Fourier transform infrared spectra verified oxalate ligand decomposition during thermal treatment and the appearance of metal oxygen lattice vibrations consistent with NCA formation. Scanning electron microscopy revealed that the 40 g NaOH sample produced more uniform particles with a narrower size distribution than other variants. Based on these results, the 40 g NaOH sample was selected for electrochemical evaluation and delivered an initial discharge capacity of about 110 mAh/g at 0.1 C in a full cell configuration. Overall, NaOH is demonstrated as an effective and safer substitute for ammonia in oxalate coprecipitation, enabling greener NCA synthesis protocols for research and teaching.
Biosynthesis and Characterization of ZnO Nanoparticles with Beet Extract (Beta vulgaris L.) as Latent Fingerprint Identification Sri Adelila Sari; Riri Virzan Putri Br. Siregar; Luthfi Qori Nabillah; Hanisah Hasibuan; Naji Arafat Mahat
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 9, No 3 (2024): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v9i3.91700

Abstract

The uniqueness and permanence of patterns make fingerprints one of the most significant forensic tools for individual identification. The issue is that conventional fingerprint powders, frequently used today, pose serious health and environmental risks due to their use of toxic chemicals. This novel study utilizes sustainable and innovative techniques to investigate the effectiveness of beetroot fruit extract for latent fingerprint visualization. Zinc oxide (ZnO) nanopowders were synthesized using a green synthesis method, having beet fruit extract as an aqueous solvent. For applications on porous and non-porous surfaces, the fabricated ZnO was characterized using Fourier Transform Infrared (FT-IR) spectroscopy, Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray (EDX) analysis up to October 2023. Thirty samples were provided to perform latent fingerprint analysis. The results show that ZnO nanopowders synthesized using beet fruit extract could provide safe, non-destructive, and efficient visualization of the latent fingerprints. Of the six fingerprint patterns examined, the most common was the Plain Whorls pattern, which represented 47% of prints identified. These results highlight beet fruit extract's natural potential and efficacy as a contrast agent for imaging latent fingerprints. This clean approach can provide a novel alternative for forensic biology, characterized by low toxicity, sustainability, and high efficacy, which can lead to a safe forensic practice.
Mapping Minds in Chemistry: Implementing the Flow Map Method within the 8E Learning Cycle to Uncover Students’ Cognitive Structures Elma Suryani; Achmad Ridwan; Rizky Sulistyowati; Edith Allanas; Sarina Hanifah; Fazila Windy Febriani; Ahmad Hafizh; Musyahadah Rodiatam Mardiah
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 11, No 1 (2026): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v11i1.110357

Abstract

Understanding students’ cognitive structure is essential for improving conceptual learning in science, particularly in challenging topics such as the rate of reactions. However, many students struggle with fragmented knowledge and misconceptions in this area. This study investigates how the 8E Learning Cycle model supports the development of students’ cognitive structure, analyzed through the flow map method. The participants were 33 Senior high school students, and a qualitative approach was employed using multiple data sources (flow maps, worksheets, interviews, journals, observations, and comprehension tests). Cognitive structure was examined based on Tsai’s six variables: extent, richness, integration, misconceptions, information retrieval rate, and flexibility. Results indicated that at the beginning of instruction, students’ average scores on cognitive structure variables were low, while misconceptions were frequent. After engaging in the 8E Learning Cycle, students demonstrated notable improvement across all variables, accompanied by a marked reduction in misconceptions. This study provides empirical evidence that the 8E Learning Cycle model effectively strengthens students’ cognitive structures in science learning, offering a practical framework for addressing conceptual difficulties in reaction rate topics
Unveiling Students' Understanding of Ammonia as a Weak Base through Scaffolding-Based Chemical Reasoning Assessment Yuda Faturohman; Endang Susilaningsih; Harjono Harjono; Murbangun Nuswowati; Ella Kusumastuti; Dimas Gilang Ramadhani
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 1 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i1.100779

Abstract

Reasoning is a basic cognitive ability in science learning, especially in chemistry, in which students must connect macroscopic, symbolic, and microscopic levels. However, most students seem to have difficulty learning chemical reasoning, especially in the ionization of weak bases (examples: NH₃). This study uses a scaffold-based assessment to evaluate students' explanations for ammonia as a base. A paper-and-pencil test was applied to 91 first-year preservice chemistry students to test them on phenomenological, mechanical, and structural types of reasoning. Two raters rated responses, and scoring reliability was assessed using Cohen’s Kappa (0.925). The data analysis consisted of descriptive statistics, correlation analysis, clustering (K-Means and t-SNE), and regression prediction with XGBoost. The results demonstrate that structural reasoning exhibits the highest level, but phenomenological reasoning has the most variation. There appears to be a high correlation between phenomenological empirical generalization and structural reasoning (r = 0.35+). Clustering outputs show three categories of students: high (R3), moderate (R2), and low (R1) reasoning, and most of the students are categorized at the moderate reasoning level, indicating some misconceptions. The XGBoost model performs well in predicting high-reasoning students but not in the moderate-reasoning classification. This paper indicates the power of scaffolding-embedded assessment for deducing reasoning patterns and misconceptions in ammonia ionization. The results can guide adaptive learning approaches for improving students' chemical reasoning.
Removal of Cu(II) and Pb(II) Ions from Wastewater Solutions Using Black Soldier Fly (Hermetia illucens) Pupal Shell: Adsorption and Characterization Eko Prasetyo Kuncoro; Azra Rhea Darmawati; Pramudya Lizza Roshita; Thin Soedarti
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 1 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i1.100111

Abstract

Industrial wastewater often contains heavy metals such as Pb(II) and Cu(II) that pose significant environmental and health risks. This study investigates the utilization of Black Soldier Fly (BSF) (Hermetia illucens) pupal shells as an adsorbent material for the removal of Pb(II) and Cu(II) ions from aqueous solutions. BSF pupal shells were chosen due to their high availability, rapid life cycle, and chitin-rich composition, making them suitable for heavy metal adsorption. The preparation process included washing, drying, grinding, and activation with 1 M NaOH solution. Characterization of the adsorbent was performed before and after adsorption using Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy coupled with Energy Dispersive X-ray Spectroscopy (SEM-EDX). Adsorption experiments were conducted to examine the effects of pH, contact time, and initial ion concentration. The optimum pH for adsorption was found to be 5.5, achieving removal efficiencies of 95.5% for Pb(II) and 71.81% for Cu(II). The optimum contact times were 180 minutes for Pb(II) and 240 minutes for Cu(II). Kinetic analysis demonstrated that the adsorption process followed a pseudo-second-order model. Adsorption isotherm studies indicated that the Langmuir model provided a better fit (R² = 0.99 for Pb(II) and 0.98 for Cu(II)) compared to the Freundlich model (R² = 0.90 for Pb(II) and 0.77 for Cu(II)). These results demonstrate that BSF pupal shells are a promising, cost-effective, and environmentally friendly material for industrial wastewater treatment applications
Synthesis and Characterization of Sucrose-Modified CaO Catalyst Derived from Dolomite for Transesterification of Reutealis trisperma Oil Nuni Widiarti; Belia Anggi Sri Julianti; Mohammad Alauhdin; Yuan Maylia Rosanti
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 3 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i3.103570

Abstract

This study presents a novel method for synthesizing solid base catalysts by modifying calcium oxide (CaO) from dolomite via a sucrose-mediated hydrothermal process. In this approach, sucrose acts as a complexing agent to remove magnesium ions (Mg²⁺), a structure-directing agent, and a carbon-based template. After Mg²⁺ removal, calcium species were recovered through coprecipitation using sodium carbonate. The synthesized catalysts were characterized to evaluate their structure using X-ray diffraction (XRD), identify functional groups via Fourier-transform infrared spectroscopy (FTIR), observe morphology and elemental composition through scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX), measure particle size distribution by particle size analysis (PSA), and determine surface area through Brunauer-Emmett-Teller (BET) analysis. The catalysts exhibited a surface area of 27.411 m²/g and reduced crystallite size, both contributing to enhanced catalytic activity. In the transesterification of Reutealis trisperma oil under optimal conditions (65 °C, 3 hours, methanol-to-oil ratio 9:1), the catalyst achieved 99.40% oil conversion and 88.82% biodiesel yield. A catalyst dosage of 7.5 wt% was optimal, while higher amounts caused emulsion and soap formation due to viscosity-related mass transfer limitations. This environmentally friendly synthesis route offers a reusable catalyst system for sustainable biodiesel production from non-edible feedstocks.
The conversion of bioethanol from pineapple waste to biobutanol derivatives over NiMoO4/rGo catalyst Allwar Allwar; R. B. S. Ningrum; Alya Imanya; Adinda Zulfaati Rahma
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 9, No 3 (2024): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v9i3.95283

Abstract

Increasing demand for sustainable energy solutions has spurred the development of catalytic materials to convert renewable resources into value-added hydrocarbons. In this work, we investigate the feasibility of NiMoO4/rGo as an effective catalyst for converting bioethanol into renewable hydrocarbons. The surface and microstructural characteristics of rGo showed major findings like BET surface area of 26.9 m2/g with mesoporous, sufficient surface functional groups, crystalline size of 49.12 nm, and a progressive metal oxide uniform distribution on the rGo surface. The crystal morphology showed an irregular texture, suggesting strong catalytic activity. The optimal conversion was thus observed at 80°C, 90°C, and 100°C. Superior catalytic activity at 80°C afforded the resultant three major hydrocarbon-based products: 2-butanol (1.32%), isobutyl alcohol (0.89%), and 3-methyl-1-butanol (0.89%). Such products have important potential as renewable substitutes in diverse industries. Our study highlights the potential of using NiMoO4/rGo as an effective catalyst for bioethanol conversion due to its mesoporous structure, oxygen groups, and high dispersion of active metal oxide. Overall, this study renders NiMoO4/rGo a viable catalyst candidate in sustainable chemical processes and thus accelerates the application of bioethanol to manufacture precious hydrocarbon derivatives. These findings underscore the key to optimizing temperature conditions to maximize product yield and enhance the economic viability of renewable energy resources.

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