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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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A Portable Laboratory Kit for Student Self-Learning on Factors That Affect Reactions Widhiyanti, Tuszie; Fatihah, Jihan Assyifa; Mulyani, Sri; Wiji, Wiji
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.v10i1.84495

Abstract

In chemistry practicums, students can enhance their scientific thinking skills and develop scientific attitudes. However, in some underprivileged schools, particularly during the COVID-19 pandemic, practicum activities were restricted due to the unavailability of laboratory tools and materials. To address this issue, a portable laboratory kit was developed to support practical learning experiences. This study aims to develop a portable laboratory tool model, integrating the Predict-Observe-Explain (POE) approach, to improve students' learning outcomes on reaction rates. This research employs a mixed-methods approach with an embedded experimental model, utilizing a one-group pretest-posttest design. The portable laboratory kit includes hands-on tools and materials, student worksheets, and teacher guides aligned with POE learning syntax. Three experts conducted validation and implementation involving 24 high school students. A novelty of this study lies in the practical worksheet design, which follows the POE learning syntax and fosters intertextual relationships across macroscopic, submicroscopic, and symbolic representations. The findings reveal a significant difference between pretest and posttest scores regarding students' understanding of factors affecting reaction rates. Specifically, the number of students who demonstrated complete understanding after the intervention was: nine for the effect of structure on reaction rate, 13 for the effect of ionization energy on reaction rate, and 20 for the effect of surface area on reaction rate. Regarding catalysts, 15 students fully understood the effect of a homogeneous catalyst, and 18 students understood the effect of a heterogeneous catalyst. Interviews with teachers and students further indicated that students found the approach novel, motivating them to engage more deeply. Additionally, many students expressed feeling particularly challenged during the prediction stage of the POE learning process.
Impact of Albizia Wood (Albizia Chinensis) Adsorbent on the Reduction of Pollutants and Copper in Industrial Wastewater Sukmawardani, Yulia; Jualiah, Siti; Subarkah, Cucu Zenab; Agustina, Tri Wahyu; Nuryantini, Ade Yeti; Farida, Ida
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.v9i3.89076

Abstract

This paper investigated the possibility of using mothball tree wood to absorb copper from industrial wastewater. The adsorbent is made from sawdust, activated with 3N H3PO4 for 24 hours to increase its porosity and surface area, and examined its morphology and microstructure by Scanning Electron Microscope (JEOL-6510A). Pollution abatement experiments were carried out with uncontrollable samples from these three original rivers contaminated by textile, laundry, and industrial revenues. Copper content was determined by Atomic Absorption Spectroscopy (AAS); as well as various parameters such as the dissolved oxygen (DO), BOD5,codconsumed nitrates nitrogen, TDS, and TSS measured. As a result of the adsorption process, a significant reduction of pollutants was achieved. The concentrations of copper in samples reduced to lower than measurable levels or became "trash elements," while initial Cu content turned to 0.017ppm, 0.006ppm, and 0.026ppm. Gains included incorruptible DO rates (54.17% textile)d5 BOD falls by 50.05%, 58.56%, and 68.94%, respectively. COD decreased by 33.33%, 50.00%, and 25.00%. Lower TDS enrolled 3.9%, 12.9%, 57.4% TSS went down to 96.38%, 79.17%, 39.76%. These results illuminate the potential of using Albizia wood as an adsorption medium in wastewater treatment, with pollution reductions evident. Future research can further this by using more advanced analysis methods such as XRD,FTIR, turbidity tests and looking at other natural adsorbent materials for improving water treatment.
Eco-Friendly Revolution in Fingerprint Detection: Synthesis of Zno Nanoparticles Using Durian (Durio Zibethinus) Peel Extract Pakpak Bharat Sari, Sri Adelila; Febriana, Rani; Kabeakan, Feri Yuni Asiyah
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.v10i3.106878

Abstract

Fingerprints are a reliable means of forensic identification because ridge patterns are unique and permanent. Conventional fingerprint powders, however, may contain hazardous ingredients that pose health and environmental risks. This study synthesized zinc oxide (ZnO) nanoparticles via a green route using durian peel (Durio zibethinus) extract and evaluated their potential as an eco-friendly latent fingerprint developer. ZnO nanoparticles were characterized by FTIR to identify functional groups, SEM to examine morphology and particle size, and EDX to verify elemental composition. The biosynthesized ZnO showed semi-spherical to granular particles with sizes of 40–90 nm and no severe agglomeration. FTIR indicated hydroxyl and carbonyl groups from durian peel biomolecules, suggesting their role as reducing and stabilizing agents. EDX confirmed dominant Zn (72.5%) and O (15.2%) signals, supporting high purity ZnO formation. Latent fingerprint development was tested using prints from 40 respondents on porous surfaces (black cardboard and oil paper) and nonporous surfaces (microscope slide, aluminum foil, and compact disc). The ZnO nanopowder produced clear ridge patterns and higher contrast on nonporous substrates, while conventional powders tended to leave residues and may require less safe reagents. These results indicate that durian peel derived ZnO nanoparticles are a promising, economical, and environmentally friendly alternative for latent fingerprint visualization and provide added value for agricultural waste utilization in forensic applications.
Synthesis, Characterization, and Antibacterial Activity of ZnO-CuO Nanoparticles Embedded in Chitosan and Polyvinyl Alcohol as Supporting Materials Fatoni, Ahmad; Putriani, Marcelina; Lubis, Amar Mulya; Hasanah, Mauizatul; Munarsih, Ensiwi; Hidayati, Nurlisa
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.v10i1.92433

Abstract

The biosynthesis of bimetallic metal nanoparticles (ZnO–CuO) and their interaction with chitosan and polyvinyl alcohol (PVA) have garnered significant attention in recent years, primarily due to their promising antibacterial applications. This work proposes the bio-fabrication of ZnO–CuO nanoparticles, chitosan–PVA–ZnO–CuO nanoparticle films, and reports their physicochemical and antibacterial potential. Green betel leaves (Piper betle L.) ethanol extract was used to synthesize ZnO–CuO nanoparticles. For as-prepared bimetallic NPs, chitosan (CS), PVA, and bimetallic NPs-based films were fabricated using the casting technique. The films were investigated by Fourier Transform Infrared (FT-IR) spectroscopy, X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and the antibacterial activity was evaluated by the agar diffusion method. FT-IR measurements showed the presence of Zn–O and Cu–O functional groups at 396 cm⁻¹ and 418 cm⁻¹ in the nanoparticles, and the films A, B, and C, these bands were observed at 394–395 cm⁻¹ (Zn–O) and 409–416 cm⁻¹ (Cu–O). Crystallite sizes of ZnO, CuO, and ZnO–CuO NPs were 4.845 nm, 54.143 nm, and 5.306 nm, respectively. SEM examination showed that the surface of the films was rough and not homogeneous. Antibacterial experiments revealed the better inhibitory activity of film C than film A and film B. The advantage of the antibacterial property was attributed to the reactive oxygen species (ROS) generated by the ZnO–CuO in collaboration with chitosan. These results indicate that chitosan/PVA film loaded with ZnO–CuO NPs holds great promise as an effective antibacterial packaging material.

Page 12 of 12 | Total Record : 114

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