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Journal Of Research and Education Chemistry (JREC)
Published by Universitas Islam Riau
ISSN : 26858967     EISSN : 26858959     DOI : https://doi.org/10.25299/jrec.2022.vol4(1).9315
Core Subject : Science, Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Education
1. research and reviews literature about chemistry education such as : instruction, learning and theaching, curriculum development, learning environment, theacher education, educational and educational development in chemistry education 2. research and review literature about chemistry such as : organic, inorganic physical, analitycal, biochemistry, material chemistry, environment, ethnochemistry and its application in teaching and learning
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 9 Documents
 1 
Search results for , issue "Vol. 8 No. 1 (2026): April" : 9 Documents clear
Pengaruh Penambahan Bahan Penunjang Dari Kelapa Sawit PAda Palm Oil Mill Effluent Pada Pembuatan Pupuk Organik Cair Herman, Dya; Ayusetyowati, Sekar; Mustafa, Mustafa; Rahayu, Ibnu Eka
Journal of Research and Education Chemistry Vol. 8 No. 1 (2026): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2026.vol8(1).21650

Abstract

Liquid organic fertilizer comes from fermented animals or plants and is in liquid form. Liquid organic fertilizer can increase soil nutrients because it contains plant nutrients such as phosphorus, nitrogen, and potassium. POME is a liquid waste produced from the manufacture of palm oil from oil palm. Empty Oil Palm Fruit Bunches (OPEFB) and oil palm fronds are sources of organic material rich in nutrients N, P, K, and Mg. This study aims to determine the effect of adding OPEFB ash and oil palm fronds in the manufacture of liquid organic fertilizer using liquid waste from the palm oil industry using MOL OPEFB and fermented for 13 days. In this study, the addition of supporting materials OPEFB ash and oil palm frond fiber with variations of 1%, 3%, 5%, 7% and 9% (w/v). The results showed that the addition of OPEFB ash and oil palm frond fiber was able to increase the content of N, P, and K compared to the initial conditions. The highest nitrogen content was obtained with the addition of 5% oil palm frond fiber, namely 0.1204% (w/v). The highest phosphorus content was obtained with the addition of 9% OPEFB ash, namely 0.0733% (w/v), but both values ​​did not meet the SNI 19-7030-2004 standard. Meanwhile, the highest potassium content was obtained with the addition of 7% OPEFB ash, namely 0.8898% (w/v), which has met the SNI 19-7030-2004 standard. Thus, the addition of OPEFB ash and oil palm frond fiber has an effect on improving the quality of POC, especially in increasing the potassium nutrient content.
PENGEMBANGAN E-LKPD BERBASIS REACT MENGGUNAKAN WIZER.ME PADA POKOK BAHASAN TERMOKIMIA KELAS XI SMA/MA SEDERAJAT Masayu, Risa Alia; Rasmiwetti, Rasmiwetti; Abdullah, Abdullah
Journal of Research and Education Chemistry Vol. 8 No. 1 (2026): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2026.vol8(1).22776

Abstract

This study aims to develop an E-LKPD (Digital Student Worksheet) based on the REACT model (Relating, Experiencing, Applying, Cooperating, Transferring) using Wizer.me for the topic of Thermochemistry in class XI SMA/MA (high school/equivalent). The method used is Research and Development (R&D) with the ADDIE model (Analysis, Design, Development, Implementation, Evaluation). Validation was conducted by two content experts and one media expert, resulting in an average score of 94.41% for aspects of content validity, language, presentation, and graphics, as well as 93.18% for visual presentation and 100% for software utilization. Trials with teachers resulted in a score of 96.72%, while student responses obtained a score of 84.02%, both categorized as very good. These findings indicate that the developed E-LKPD is valid and effective in enhancing students' understanding of Thermochemistry concepts. This research also contributes to the development of innovative learning resources that support active and collaborative learning in the classroom.
PENGEMBANGAN E-LKPD BERBASIS SOCIO SCIENTIFIC ISSUE MENGGUNAKAN APLIKASI LIVEWORKSHEET PADA MATERI TERMOKIMIA KELAS XI SMA/MA SEDERAJAT Achiryani, Rachmawati Septia; Erviyenni, Erviyenni; Abdullah, Abdullah
Journal of Research and Education Chemistry Vol. 8 No. 1 (2026): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2026.vol8(1).25837

Abstract

This study aims to develop a socio scientific issue-based E-LKPD on Thermochemistry material that is valid and receives positive responses from users. The research employed the ADDIE development model, consisting of five stages: analysis, design, development, implementation, and evaluation. Research data were collected through validation sheets and user response questionnaires. The validation results conducted twice indicated that the E-LKPD was considered highly valid by material and media experts, with percentage scores across various aspects exceeding 96%. User response trials showed positive feedback from both teachers and students, with percentages of 91.41% and 92.29%, respectively. Based on these findings, the E-LKPD is declared valid and positively received, making it feasible for use in Thermochemistry learning.
chemistry students perception toward english technical vocabulary in their discipline fitriyani, novita; wahyunengsih; hafeeza, aqsha
Journal of Research and Education Chemistry Vol. 8 No. 1 (2026): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2026.vol8(1).26788

Abstract

English technical vocabulary is an important component in chemistry learning, particularly for understanding concepts, laboratory activities, and scientific references. This study aims to examine chemistry students’ perceptions of English technical vocabulary in terms of its importance, challenges, learning strategies, and instructional needs. A descriptive quantitative approach was employed using a Likert-scale questionnaire administered to 57 undergraduate chemistry students at UIN Syarif Hidayatullah Jakarta who had completed chemistry courses involving English terminology. The results indicate that students have a high perception of the importance of English technical vocabulary (M = 4.06), especially in supporting academic activities such as reading textbooks and understanding scientific articles. However, students also experience moderate challenges in mastering technical vocabulary (M = 3.82), particularly in distinguishing terms with similar meanings. To address these difficulties, students actively employ various learning strategies (M = 3.90), mainly through contextual learning, routine reading, peer discussion, and the use of digital tools. In addition, students express a strong need for systematic instructional support (M = 3.98), including collaboration between chemistry and English lecturers. Overall, the findings suggest that although English technical vocabulary is perceived as essential, targeted and integrated vocabulary instruction within chemistry courses is still required to reduce learning difficulties and support students’ conceptual understanding.
Efektivitas Adsorben Karbon Dioksida Berdasarkan Kapasitas Adsorpsi, Waktu Tembus, dan Keamanan: Tinjauan Naratif Phalosa, Ghani; Riadi, Taufik; Syahputra, M. Keflin
Journal of Research and Education Chemistry Vol. 8 No. 1 (2026): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2026.vol8(1).27321

Abstract

Carbon dioxide accumulation in enclosed environments is a critical challenge due to its direct impact on health, cognitive performance, and operational safety. Although various carbon dioxide sorbents have been developed, existing studies generally address sorption capacity, saturation time, or safety aspects separately, resulting in fragmented evidence and not yet providing comprehensive guidance for integrated performance assessment. This study aims to address this gap through a comparative and multidimensional evaluation of various carbon dioxide sorbents based on sorption capacity, saturation time, and safety aspects. The method used is a narrative literature review with systematic collection and comparative synthesis of reputable scientific publications discussing chemical reaction-based sorbents, such as soda lime, lithium hydroxide, and calcium hydroxide, as well as physical adsorption-based adsorbents, such as activated carbon, zeolites, and metal-organic frameworks. The analysis results indicate that chemical reaction-based sorbents generally have higher sorption capacity due to the rapid chemical reaction, but potentially experience shorter saturation times and operational risks related to exothermic reactions and the formation of byproducts. In contrast, physical adsorption-based adsorbents tend to exhibit more stable dynamic performance and better regeneration ability, despite their relatively moderate sorption capacity. It is concluded that sorption capacity alone is insufficient to predict operational effectiveness. This review offers a performance-tradeoff-based evaluation framework as a basis for selecting safer and more reliable carbon dioxide sorbents in enclosed environments.
Analisis Fouling Resin dan Efektivitas Regenerasi Kimia pada Unit Mixed Bed Demin Plant Muhammad Genta Zuan Nur Illyasa; Sinardi
Journal of Research and Education Chemistry Vol. 8 No. 1 (2026): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2026.vol8(1).27779

Abstract

Analysis of Resin Fouling and Chemical Regeneration Effectiveness in Mixed Bed Demineralization Units. Water requirements for various activities, such as Steam Power Plants, require water quality in the form of mineral-free water (demineralized water) obtained through a demineralization process using a mixed bed. Along with frequent use, the resin will reach saturation due to the accumulation of contaminants (fouling) bound by the resin, which leads to a decrease in water quality. This research aims to identify the type of fouling in resin based on water quality and visual observation of the resin, as well as to analyze the effectiveness of chemical regeneration. The research methods used were water quality analysis and visual observation of the resin. Furthermore, the chemical regeneration process used an acid-base method (HCl and NaOH). The results showed that the water quality had average values for silica, total hardness, and conductivity of 16.71 ppb, 0 ppb, and 0.159 µS/cm, respectively, with a removal efficiency of 98.32%, 100%, and 96.79%. However, the final test showed silica values exceeding the standard of < 20 ppb. This indicates silica leakage in the outlet water. Furthermore, the color change from white to pink indicates fouling in the anion resin. The chemical regeneration results showed an effectiveness percentage of 67.43% for silica values and 35.22% for conductivity, bringing the water quality back into compliance with the standards. It can be concluded that the chemical regeneration process with NaOH and HCl is able to restore the resin's ability to improve water quality.
Evaluasi Penggunaan Kemasan PVC, PVDC, dan HDPE terhadap Stabilitas Fisik dan Kimia Produk Kapsul Izdihar Putri, Salsabila Nur; gala , SELFINA
Journal of Research and Education Chemistry Vol. 8 No. 1 (2026): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2026.vol8(1).27897

Abstract

The physical and chemical stability of health supplement capsules is influenced by the packaging materials used, particularly their barrier capacity against moisture and oxygen. However, comparative studies on the effectiveness of PVC, PVDC, and HDPE packaging materials in maintaining capsule stability remain limited. This study evaluated the effects of PVC, PVDV, and HDPE packaging on the stability of L-glutathione capsules. The research was conducted using an experimental stability design under accelerated condition at 40°C ± 2°C and 75% ± 5% Relative Humidity, with time intervals of 10, 20, and 30 days. Stability testing followed product specifications, encompassing parameters such as appearance, weight variation, disintegration time, moisture content, and L-glutathione content (active ingredient). Results revealed that PVC packaged samples exhibited noncompliance in several parameters, including appearance, weight variation, and L-glutathione content. In contrast, PVDC and HDPE packaging maintained compliance across all tested parameters throughout the storage period. PVDC demonstrated the best performance in maintaining the highest L-glutathione content consistently across all observation intervals. Statistical analysis using two-way ANOVA with two replications revealed that packaging type, storage duration, and their interaction significantly influenced L-glutathione content (p < 0,05). These findings provide important implications for the pharmaceutical and supplement industries in determining optimal packaging materials, as well as for regulatory authorities in strengthening the evaluation of packaging suitability to ensure product quality, safety, and efficacy during storage.
PENGARUH PENGGUNAAN BINDER WAX TERHADAP HASIL ANALISIS KADAR NIKEL METODE PRESS PELLET MENGGUNAKAN WD XRF S8 TIGER Iskandar, Ikram; Gala, Selfina
Journal of Research and Education Chemistry Vol. 8 No. 1 (2026): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2026.vol8(1).27906

Abstract

This research is motivated by the absence of simultaneous optimization between the binder wax ratio and pressing pressure in the pressed pellet method for laterite nickel content analysis using WD-XRF. Previous studies generally only evaluated one preparation parameter separately, so the effect of the interaction of the two variables on accuracy and precision has not been comprehensively studied. This study aims to evaluate the effect of the binder wax ratio and pressing pressure on the results of nickel content analysis and compare them with Certified Reference Material (CRM). The research method includes the preparation of nickel ore samples through a process of drying, crushing, and sieving to a fine size. The samples were then mixed with binder wax at variations of 1.5%, 2.0%, and 2.5%, then pressed into pellets at pressures of 15 psi, 20 psi, and 25 psi. Nickel content analysis was carried out using WD-XRF. The results showed that the Ni content was in the range of 1.58–1.64%, higher than the CRM of 1.48%, with a difference of approximately 0.10–0.16%. This difference indicates the possibility of systematic bias in the form of overestimation which can be caused by matrix effects, particle size effects, or calibration drift. The addition of binder wax significantly reduced Ni content due to the dilution effect, while pressing pressure did not significantly affect the content value, but increased the physical quality of the pellets. In addition, the characteristics of the samples from the limonite-saprolite transition zone at a depth of about five meters also contributed to nickel enrichment. Overall, the results of the study were influenced by preparation factors, analytical methods, and geochemical conditions of the samples.
ANALISIS PARAMETER KONDISI OPERASI PROSES PASTUERISASI TERHADAP KUALITAS PRODUK MINUMAN KEMASAN MUH FIQRI; A. Sry Iryani; Mansyur, Andi Irsyam
Journal of Research and Education Chemistry Vol. 8 No. 1 (2026): April
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2026.vol8(1).27919

Abstract

This study aims to analyze the effect of pasteurization process operating parameters—including temperature, contact time, flow rate, and pH—on the quality of packaged beverages, particularly flavored beverages and tea drinks. The pasteurization process is a thermal processing method used in the beverage industry to improve microbiological safety and extend product shelf life. The success of this process is highly influenced by the combination of operating parameters used. The research was conducted experimentally by varying the temperature, contact time, and flow rate during the pasteurization process, followed by product quality testing that included chemical parameters (pH and °Brix), microbiological parameters (total plate count/TPC), and organoleptic parameters (hedonic test). The data were analyzed descriptively to examine the relationship between process parameters and product quality. Based on the research results, it can be concluded that the appropriate combination of pasteurization parameters significantly determines the final product quality, both from chemical, microbiological, and organoleptic aspects. The results indicate that for flavored beverages, pasteurization at 65°C with sufficient contact time and a balanced flow rate effectively reduces microbial counts to undetectable levels while maintaining organoleptic quality. Meanwhile, for tea beverages, conditions at 135°C yield the best results in terms of microbiological safety and consumer acceptability. Excessively high temperatures lead to a decline in sensory quality due to the degradation of flavor and aroma components.

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