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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 114 Documents
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Optimization of Antibacterial Edible Film Formulation Based on Chitosan, Velvet Bean Ethanol Extract, and Cinnamon Essential Oil Ariani, Sri Retno Dwi; Rohmatun, Tyas Dwi; Susilowati, Endang; Setyowati, Widiastuti Agustina Eko; Munifah, Ifah; Sholihah, Khoirur Rohmaniatush
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.v9i3.90152

Abstract

The existing research on edible films as packaging materials has maintained that they are better in constituent materials, composition, and functionality. Due to their good bioactivity, edible films are utilized for packaging, which is considered bioactive. The recent study focused on using chitosan-velvet bean (Mucuna pruriens (L.) DC.) based edible bioactive packaging formulation for antibacterial activity. Velvet bean ethanol extract (V) accompanied by cinnamon (Cinnamomum burmannii (Ness) BL) essential oil (C) which is effective as an antibacterial against Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 25923. Based on this study, the ascertained concentrations of V and C can generate the most optimum edible film associated with antibacterial activity and characterize the physical properties and morphology of the most optimum formulation of antibacterial edible film. It was proved that by addition of 30% V and 3.0% C, the most optimum edible film can be produced, which has maximum antibacterial activity against E. coli ATCC 25922 (19.36 mm strong) and S. aureus ATCC 25923 (18.94 mm strong). Moreover, this formulation boosts the thickness, tensile strength, and solubility of the film and simultaneously reduces the film's elongation, WVTR, and WVP. The edible bioactive packaging formulation produced thickness, tensile strength, solubility, percentage elongation, WVTR, and WVP values of 0.179 mm, 0.318 Mpa, 0.057%, 10.096%, and 3.747 g/m2.d, 8.586 g/m.d, respectively. The surface of the edible film still had some degree of porosity and texture, according to the morphology.
Development and Evaluation of Articulate Storyline-Based Interactive Media: Integration of Socio-Scientific Issues in Hydrocarbon Learning to Enhance Students’ Critical Thinking Skills Nora'in, Miranda; Sholahuddin, Arif; Humaira, Norsifa; Rosita, Febry; Khadijah, Siti; Rezani, Muhammad Ismi
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.v10i2.105973

Abstract

Critical thinking enables students to make informed decisions, resist misinformation, and construct deeper disciplinary understanding, yet it remains underdeveloped in many classrooms. This study developed and evaluated an interactive hydrocarbon learning medium created with Articulate Storyline and integrating socioscientific issues (SSI) within the ADDIE framework (Analysis, Design, Development, Implementation, Evaluation). The research was conducted at an Islamic boarding school in Banjarmasin with 61 students (individual try-outs: n = 5; small-group trials: n = 10). Instruments—questionnaires, observation sheets, and tests—were aligned to Facione’s six critical-thinking indicators and used to assess validity, practicality, and effectiveness. Content and media validity were high (expert ratings: 0.89 and 0.88), internal consistency was acceptable (Cronbach’s alpha = 0.86), and practicality was rated very good (mean = 4.59). Effectiveness analyses showed substantial learning gains (normalized gain, n-gain = 0.77 and 0.78) and statistically significant pre- to post-improvements (paired t-tests, p < 0.001), indicating the medium effectively enhances students’ critical thinking in chemistry. Limitations include the focus on a single topic (hydrocarbons), a single site with a modest sample, and no assessment of other skills or long-term retention. Within these bounds, the media demonstrate strong quality and practical classroom value, supporting teachers to design engaging, student-centered instruction that cultivates deeper thinking.
Green Synthesis of Silver Nanoparticles using Lemongrass Leaf (Cymbopogon citratus) Extract as a Reductant for Novel Colorimetric Mercury(II) Detection Pratiwi, Yussi; Febrian, Yogi; Anggraini, Listya Eka; Khansa, Harfi Amania; Widianti, Riskia Chandra
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.v10i3.109804

Abstract

Mercury(II) contamination in water poses serious risks to human health, requiring rapid detection. This study develops a fast colorimetric sensor based on silver nanoparticles (AgNPs) synthesized using lemongrass (Cymbopogon citratus) leaf extract as a green reducing agent. Synthesis conditions were optimized, the AgNPs were characterized, and analytical performance was validated using standard parameters. Sensor responses were monitored by UV Vis spectroscopy through changes in the surface plasmon resonance (SPR) band and quantified from absorbance variations. The optimum synthesis produced a reddish brown AgNP colloid at 45 minutes, 3 mM AgNO3, and 10% lemongrass extract. The nanoparticles showed a maximum absorption at 432 nm and an average size of 150.8 nm. Validation results indicate excellent selectivity for Hg2+ and a pronounced change in the overall SPR signal at 600 ppm Hg2+. The method was linear over 0 to 0.8 ppm Hg2+ with R2 = 0.9988 (y = 0.04x + 0.0722). The limits of detection and quantification were 3.681 × 10^-9 ppm and 1.115 × 10^-8 ppm, respectively. Molar absorptivity reached 10.84 × 10^3 L mol^-1 cm^-1 at 416 nm. These results demonstrate that lemongrass mediated AgNPs provide a simple, rapid, and sensitive platform for mercury detection in water.
LC-MS/MS Metabolite Profiling of Meistera aculeata (Roxb.) Škorničk. & M.F. Newman (Susube) and Preliminary Brine Shrimp Lethality Screening Megawati, Megawati; Baari, Muhamad Jalil; Sabandar, Carla Wulandari
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.v11i1.113611

Abstract

Meistera aculeata (Roxb.) Škorničk. & M.F. Newman is a species of the Zingiberaceae family distributed in Southeast Sulawesi, Indonesia, particularly in Konawe Regency. The fruits are traditionally consumed and used as a culinary spice by the Tolakinese community. However, information regarding its metabolite composition and biological activities remains limited. This study aimed to profile putative metabolites using LC–MS/MS and to evaluate preliminary lethality using the Brine Shrimp Lethality Test (BSLT). Dried powders of rhizomes, stems, leaves, and fruits were extracted by maceration with methanol. Metabolite annotation was performed using LC–MS/MS, while cytotoxic potential was assessed through BSLT. The analysis tentatively detected 13 metabolites dominated by flavonoids, phenylpropanoids, and terpenoids. Methanol extracts of rhizomes, stems, leaves, and fruits showed toxic activity with LC₅₀ values of 56.6 ± 9.9, 70.1 ± 8.1, 71.6 ± 9.3, and 115.5 ± 13.5 μg/mL, respectively, compared with K₂Cr₂O₇ as a positive control (LC₅₀ 11.5 ± 1.6 μg/mL). Literature comparison suggests that although these metabolites have been reported in other plant species, their occurrence in M. aculeata is reported here for the first time. The BSLT results indicate preliminary cytotoxic activity, suggesting the presence of bioactive compounds. These findings support further chemotaxonomic and pharmacological investigations to identify potential marker compounds and expand knowledge of metabolites within the Zingiberaceae family, particularly the genus Meistera.
Online Eye-Tracking: Observing the Attention of Pre-service Chemistry Teacher from Non-Science Backgrounds in Solving Chemistry Problems Muna, Khairiatul; Rahmawati, Helda; Bahit, Muhammad; Rasid, Saipul; Marisa, Lutfiana; Rosana, Rosana; Istiqamah, Nurul
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.v10i2.96748

Abstract

Recent advances in online eye-tracking allow researchers to capture eye movements as visible markers of attentional processes. This study adopts a mixed-methods design using webcam-based eye tracking via the RealEye platform to profile the attentional patterns of pre-service chemistry teachers who completed non-science tracks in high school. Two participants from the Chemistry Education program at UIN Antasari Banjarmasin undertook a problem-solving task in chemistry; their eye movements were recorded and analyzed descriptively. In framing attention, we distinguish between overt orientation—shifts in gaze toward a target—and covert orientation—mental shifts of focus without corresponding eye movements. Findings indicate that both participants required a comparatively longer time to observe, read, and solve the given problems. These attentional profiles align with their problem-solving outcomes, which fell into the medium and low performance categories. The results suggest that a non-science secondary background may be associated with less efficient visual strategies when tackling chemistry tasks. Targeted instructional support—such as scaffolded practice with chemical representations and stepwise problem decomposition—may therefore be warranted in teacher-education curricula.
Chitosan-Silica (CS/Sc) Composites as Promising Adsorbents for Fe(III) Removal in Water Purification Amri, Yulida; Khairana, Fakhira; Nila, Ida Ratna; Fajri, Rahmatul
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.v10i3.107769

Abstract

Fe(III) contaminated water has become a serious environmental concern, creating a need for effective and affordable adsorbents. This study evaluates the performance of chitosan silica (CS/Sc) composites for Fe(III) removal. CS/Sc composites were synthesized via a sol-gel route by varying the volume ratio of 1% chitosan to 5% silica. The ratio significantly influenced surface morphology. The 4:3 composition showed silica dominance with an inhomogeneous surface, while the 4:4 composition exhibited a more porous and homogeneous structure. The 4:5 composition yielded the most homogeneous and porous surface, exhibiting increased Si and N signals, which indicate a stronger interaction between chitosan and silica. Fe(III) adsorption tests were conducted at pH 2. Both adsorption capacity (q) and adsorption efficiency (η) increased with increasing silica proportion. The CS/Sc 4:3 composite showed an adsorption capacity q of 0.391 mg g⁻¹ and an adsorption efficiency η of 5.211%. The 4:4 composite reached q of 2.701 mg g⁻¹ and η of 36.012%. The highest performance was obtained with the 4:5 composite, yielding a q of 3.266 mg g⁻¹ and an η of 43.542%. These results demonstrate that the CS/Sc composite with a 4:5 ratio is the most promising formulation for Fe(III) removal and water purification applications. The novelty of this work lies in the targeted application of CS/Sc composites for Fe(III) adsorption, which has been rarely reported, and in providing insight into how compositional variation affects structure and adsorption performance
Determination of Total Flavonoid Content and antibacterial activity of Nanogel combination of Red Betel Leaf and Tapak Liman Marwa, Hanun Aishy; Prins, Nadine Ayu Syaima Gustaf; Imanita, Alliva Ro'ain Abbiyu; Maharani, Fania Putri Wiba; Dinurrosifa, Rahmawati Salsa
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.v11i1.109637

Abstract

Flavonoids are secondary metabolites with antioxidant, antibacterial, and anti-inflammatory properties. This study aimed to determine the total flavonoid content of red betel (Piper crocatum) and tapak liman (Elephantopus scaber L.) extracts and to formulate them into nanogel preparations. Extraction was carried out by maceration using 70% ethanol, and total flavonoid content was measured by UV-Vis spectrophotometry with quercetin as the standard. The results showed that red betel extract contained the highest flavonoid level (75.15 ± 0.55 mg QE/g), while tapak liman extract had 22.10 ± 0.25 mg QE/g. The combined nanogel formulations contained 39.66–40.30 mg QE/g of flavonoids and met topical preparation standards, with Formula 2 showing the most optimal characteristics (particle size ±255 nm, physiological pH, good homogeneity). Antibacterial testing confirmed that all formulas inhibited Staphylococcus aureus, with Formula 3 exhibiting the strongest activity. These findings indicate that red betel and tapak liman extracts can be successfully developed into nanogel formulations as promising modern herbal preparations. 
Characterization of Chicken Eggshell-Derived Hydroxyapatite/Zeolite Composite as a Methylene Blue Absorbent Safitriani, Nur; Ramadani, Kurnia; Chadijah, Sitti; Adawiah, Syarifah Rabiatul; Andriani, Titik; Firnanelty, Firnanelty
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.v10i1.99042

Abstract

Purebred chicken eggshell is a promising natural source because it contains high calcium carbonate (CaCO3), which is used as a hydroxyapatite (HAp) precursor, with natural abundance and biodegradability, making it an eco-friendly alternative to synthetic materials. HAp is relevant for dye removal because of its high adsorption capacity, chemical stability, and ability to interact with dye molecules through ion exchange and surface interactions with the material. The composite adsorbent of Hap-zeolite is effective for wastewater treatment based on the result of HAp-zeolite composite's adsorption capacity against methylene blue. Methylene blue is one of the dyeing wastes originating from the textile industry. The method of synthesis of Hap used precipitation. The FTIR characterization results showed OH groups at wavenumber 3434 cm-1, CO32- group with wavenumber 1421 cm-1, PO43- bending group with wavenumber 565 cm-1, and PO43- stretching at wavenumber 1035 cm-1. The highest peak XRD yield at an angle of 2θ=34.04º corresponds to a hexagonal crystal formed. The adsorption process is carried out with a HAp-zeolite mass ratio of 4:2 (w/w), with contact times for 180 minutes, resulting in the best adsorption efficiency around 99.99% measured via UV-Vis spectrophotometry. The results indicate that HAp-zeolite composites are highly effective for methylene blue removal and have potential application in wastewater treatment.
Molecular Dynamics Simulation Study: Mechanism Of Cationic And Anionic Dyes Adsorption On Montmorillonite Mubarokah, Febriati Dian; Ledyastuti, Mia; Zulfikar, Muhammad Ali
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.v10i3.100095

Abstract

Discharging dye-containing wastewater can severely degrade water quality. Adsorption is widely studied because it is selective, effective, and relatively low cost. This work examines adsorption of a cationic dye, crystal violet (CV), and an anionic dye, congo red (CR), on montmorillonite clay (MMT) using molecular dynamics simulations in GROMACS. Molecular topologies were built with a combined ClayFF and CHARMM36 force field. Simulations used a 6 nm × 6 nm × 6 nm box filled with SPC/E water (spce.gro). After minimization and NVT and NPT equilibration, production runs were carried out for 50 ns (25,000,000 steps) with a 2 fs time step at 300 K and 1 bar. Single-dye and mixed-dye systems were compared to clarify adsorption mechanisms. In the single CV system, the best performance occurred at 20 CV molecules, giving 40% adsorption. Radial distribution analysis indicates that adsorption is dominated by van der Waals interactions between the negatively charged MMT surface and the CV quaternary ammonium site (-N+). In contrast, CR was not adsorbed in the single CR system because electrostatic repulsion prevents approach to the negatively charged clay. In mixed CV–CR systems, adsorption of both dyes increased, revealing synergistic behavior. CV enters the MMT interlayer and forms an organic phase, which then immobilizes CR through hydrophobic interactions, enabling CR adsorption despite its unfavorable electrostatics under realistic wastewater conditions.
The Influence of Fe and Cr Dopant in the Synthesis of Ca3Co4O9 Thermoelectric Material on Crystal Structure, Crystal Size, Thermal Conductivity, and Electrical Conductivity Rahman, Imam Syafrudin; Tjahjanto, Rachmat Triandi; Masruroh, Masruroh
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.v9i3.93818

Abstract

In this work, we study, by sol-gel method, CCO doped with Fe and Cr dopants, the implications for the aspects, crystal structure, crystal size, thermal conductivity, and electrical conductivity. Nevertheless, CCO has low thermoelectric efficiency and thus still longs for optimization in response to the performance, stability, and ecological environment requirement, which needs improvement. Dope would enhance the concentration of charge carriers without modifying the material structure itself. X-ray diffraction (XRD) to characterize the crystal structure and the Williamson–Hall (WH) method to calculate the crystal size were performed. SEM-EDS analyses provide surface morphology, particle size distribution, and elemental composition. The results show that the dopants change, among others, crystal size, microstrain, crystallinity index, and thermal and electrical conductivity, but no change in the crystal structure itself for any of these dopants. Fe doping increased the crystal size of CCO to 144.816 nm (versus 143.382 nm for pure CCO). Compared to Cr doping, the crystal's size was reduced to 65.232 nm. Where the estimated thermal conductivity increased for both dopants, attaining a value of 1.985967 W/mK for CCO-Fe and 1.952233 W/mK for CCO-Cr, concerning the value of 1.740633 W/mK of undoped CCO. Electrical conductivity also expanded (14.50 S/cm for CCO; 14.67 S/cm for CCO-Fe; 14.83 S/cm for CCO-Cr). These improvements highlight the potency of Fe and Cr dopants to fine-tune the CCO for thermoelectric usage.

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