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All Journal The Journal of Pure and Applied Chemistry Research EduChemia: Jurnal Kimia dan Pendidikan J-PEK (JURNAL PEMBELAJARAN KIMIA) JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Indonesian Journal of Chemistry JMM (Jurnal Masyarakat Mandiri) JCER (Journal of Chemistry Education Research) Makara Journal of Science J-PEK (Jurnal Pembelajaran Kimia)
Anugrah Ricky Wijaya
Universitas Negeri Malang
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Social Sciences Other

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Pengaruh Jenis Alkohol pada Sintesis Alkil Ester dari CPO melalui Reaksi Transesterifikasi Menggunakan Katalis Heterogen CaO-MgO Santoso, Aman; Rizky, M; Sumari, Sumari; Wijaya, Anugrah Ricky; Retnosari, Rini; Asrori, Muhammad Roy
Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Vol. 5 No. 1 (2021)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rbaet.2021.005.01.01

Abstract

Low quality CPO can be made alkyl esters by transesterification reaction by alcohol. The type of alcohol that is often used in the transesterification reaction is methanol but is toxic, so we need an alternative type of alcohol. The purpose of this research is the synthesis of alkyl esters from CPO through transesterification reaction using heterogeneous catalyst CaO-MgO with different types of alcohol. This experimental laboratory research through stages:  CPO refinement, activation of CaO-MgO catalysts,  synthesis of alkyl esters from CPO with two types alcohol, identification of the components of the synthesis compound of the synthesized alkyl ester mixture using GC-MS. The results showed that (1) alkyl esters can be synthesized from CPO through the transesterification reaction with methanol and CaO-MgO catalysts with a yield of 85.72%, while the transformation of ethanol is difficult to form ethyl ether (2) the character of methyl ester synthesized has a density 0.86 g / mL, viscosity 3.23 cSt, refractive index 1.44819, and acid number 0.747 mg KOH / g methyl ester, (3) the main component of the synthesized alkyl ester contains 1,200% methyl myristic compound, methyl palmitate 40,637% methyl linoleate 9.332%, methyl 7-octadecenoate 42.986%, and methyl stearate 4.427%.
Synthesis of EDTA-Functionalized Silica Coated Nanomagnetite as a Cobalt(II) Ion Adsorbent Kusumaningrum, Irma Kartika; Arabillah, Zulfikar Wildan; Kusfianti, Anisa Aulia; Munzil, Munzil; Wijaya, Anugrah Ricky
EduChemia: Jurnal Kimia dan Pendidikan Vol 9, No 1 (2024)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v9i1.22639

Abstract

This research aims to synthesize silica-coated nanomagnetite EDTA functionalized (Fe3O4@SiO2-EDTA) to characterize its properties and test its ability to bind Co(II) metal ions. This research was carried out in several steps, including Synthesis of nanomagnetite and characterization via SEM, VSM, XRD, and FTIR; (2) Synthesis of nanomagnetite-coated silica (TEOS) and characterization via SEM, VSM, (3) Synthesis and characterization of silica-coated nanomagnetite with EDTA functionalization (Fe3O4@SiO2-EDTA), and characterization was carried out via SEM, VSM, XRD, and FTIR. (4) Adsorption ability test of Fe3O4@SiO2-EDTA as a Co(II) metal ion adsorbent. EDTA-functionalized silica-coated nanomagnetite was successfully synthesized. Confirmation and characterization of the synthesized material was performed on the basis of the FTIR spectrum band at wavenumber 687 cm-1, which confirmed the formation of magnetite, whereas the absorption band at wavenumber 1092 cm-1 confirmed the formation of a silica coating, and the peak at wavenumber 1617 cm-1 confirmed EDTA functionalization in the material. The peak of the XRD chromatogram is shown in XRD pattern 2, which confirms nanomagnetite, and in silica-coated nanomagnetite, the resulting characteristic peak is the same as the characteristic peak in Fe3O4 except in region 24, which confirms the presence of the silica coating. The magnetization of nanomagnetite before coating was 57 emu/g and that after coating was 48 emu/g. The maximum adsorption ability of the synthesized material for Co(II) ions was 0.1336 mg/g.
The Effectiveness of Aerobic and Anaerobic Methods During Start-up in Biological Shrimp Pond Wastewater Treatment Sanjaya, Eli Hendrik; Amara, Aulia; Hengky Pamungkas, Yahya; Ricky Wijaya, Anugrah; Santoso, Aman; Yulistyorini, Anie; Li, Yu-You; Chen, Hong; Fadhil Md Din, Mohd
The Journal of Pure and Applied Chemistry Research Vol. 12 No. 3 (2023): September-December 2023
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2023.012.03.3309

Abstract

One of the aquaculture wastes is shrimp pond wastewater (SPW). Generally, SPW comes from the rest of shrimp feed, shrimp dung, and died shrimp during the cultivation. As SPW is organic waste, biological wastewater treatment is the best choice. Biological method has low operating costs and environmentally friendly. There are two kind of biological methods, namely aerobic and anaerobic. Both methods have advantages and disadvantages. In this research, the performance of aerobic and anaerobic methods in treating SPW were investigated using batch experiment for more than 200 days. The results showed that the performance of the aerobic system in the initial phase was better than that of the anaerobic system, especially, in phase one which is the adaptation phase. In the first phase, COD, carbohydrate and protein removal in the aerobic system were 25.93%, 75.2% and 88.59%, while in the anaerobic system were 12.82%, 36.03% and 51.01%. In phases 5 to 10, both systems have similar performance with the optimum performance in phase 9 with 6 times substrate dilution. In this optimum phase, the COD removal values are 90% and 85% for aerobic and anaerobic systems, respectively. Meanwhile, the removal of carbohydrates and protein from both systems is about 95%.
BENTO KREATIF QUICK FREEZING SEBAGAI STRATEGI PENINGKATAN MOTIVASI DAN KETERAMPILAN MOTORIK ANAK Wijaya, Anugrah Ricky; Taufiq, Ahmad; Susanto, Hendra; Anggarani, Dinar Arsy; Firdaus, Zahra
JMM (Jurnal Masyarakat Mandiri) Vol 9, No 6 (2025): Desember
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v9i6.35492

Abstract

Abstrak: Salah satu sanggar binaan Indonesia di Malaysia menunjukkan motivasi belajar rendah dan keterampilan motorik halus yang belum optimal. Tujuan program ini adalah meningkatkan motivasi belajar dan keterampilan motorik anak di Sanggar Binaan. Program Bento Kreatif Quick Freezing diterapkan sebagai strategi edukatif inovatif melalui pelatihan pembuatan bento yang mengintegrasikan seni, gizi, dan praktik langsung. Kegiatan melibatkan 20 anak usia 7–12 tahun dan 3 guru pendamping, meliputi koordinasi dengan sanggar, pemberian materi, demonstrasi teknik quick freezing, pendampingan praktik, serta evaluasi melalui observasi dan wawancara. Hasil menunjukkan peningkatan motivasi belajar dari 45% menjadi 90% peserta aktif dan peningkatan keterampilan motorik halus dari skor rata-rata 2,8 menjadi 4,4 (skala 1–5). Program ini juga menumbuhkan kepercayaan diri, tanggung jawab, dan memperkuat hubungan sosial antarpeserta. Bento Kreatif Quick Freezing terbukti efektif sebagai media pembelajaran alternatif sekaligus strategi pemberdayaan kreativitas anak yang dapat diterapkan secara berkelanjutan di sanggar binaan. Abstract: One of Learning Center in Malaysia showed low learning motivation and underdeveloped fine motor skills. Goals if this program is enhancing student’s motivation and motoric skills in Learning Center. The Creative Bento Quick Freezing program was implemented as an innovative educational strategy through training in creative bento making that integrates art, nutrition, and hands-on practice. The activity involved 20 children aged 7–12 and three accompanying teachers, including coordination with the center, material presentation, quick freezing demonstrations, practical mentoring, and evaluation through observation and interviews. The results showed an increase in learning motivation from 45% to 90% active participants and an improvement in fine motor skills from an average score of 2.8 to 4.4 (on a 1–5 scale). The program also fostered self-confidence, responsibility, and strengthened social relationships among participants. Therefore, the Creative Bento Quick Freezing program proved effective as an alternative learning medium and a strategy to empower children’s creativity that can be sustainably implemented in the learning center.
Applied chemistry demonstration learning for the Indonesian students' association in Taiwan Anugrah Ricky Wijaya; Alif Alfarisyi Syah; Irma Kartika Kusumaningrum; Dima Vici Nadia Ariefianti; Angga Dheta Shirajjudin Aji; Khoiril Amin
J-PEK (Jurnal Pembelajaran Kimia) Vol. 10 No. 1 (2025): J-PEK (JURNAL PEMBELAJARAN KIMIA)
Publisher : Department of Chemistry, Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Indonesian migrant workers (TKI) in Taiwan face various challenges, including social inequality, limited access to educational resources, and a general lack of community support. To address these issues, the Chemistry Department of UM provided training to PPI Chung Yuan Christian University (CYCU) Taiwan, equipping them to run programs featuring demonstrations of micro-scale chemical applications, including cation and anion determination, electrolysis, and the production of soap and candles. These hands-on activities aim to develop scientific skills among the younger generation and empower migrant workers with entrepreneurial knowledge for their lives in Taiwan. Program outcomes were evaluated through surveys assessing participants' understanding and satisfaction with micro-scale demonstrations and the production of soap and candles. Results indicated that electrolysis and aromatherapy soap-making were particularly well-received, as they were easier to understand and gained popularity, with participants passing on the skills to other migrant workers. Efforts were made to ensure the program’s sustainability by actively involving the TKI community, with the hope that this initiative will help migrant workers develop valuable skills, broadening their opportunities for future success.References Angelica, R., Yoana Ledy Mutiara, Mufid Muhammad, & Salsabila Nink. (2023). Peranan Hukum Internasional Dalam Upaya Melindungi Tenaga Kerja Indonesia (TKI) di Taiwan. Das Sollen: Jurnal Kajian Kontemporer Hukum Dan Masyarakat, 1(02 SE-Articles). https://journal.forikami.com/index.php/dassollen/article/view/300 Cahyadi, N., & Baskoro, H. (2022). Sosialisasi kewirausahaan pada pekerja migran indonesia dengan design thinking. DedikasiMU : Journal of Community Service, 4(3), 282–289. https://journal.umg.ac.id/index.php/dedikasimu/article/view/4164 Damarsidi, H. R. (2017). Analisis Anomali Kebijakan Penempatan TKI: Eksploitasi Tenaga Kerja Indonesia sebagai Anak Buah Kapal Perikanan Taiwan. Journal of International Relations, 3(4), 40–48. Kartikasari, D., & Muthmainah, M. (2023). Pengaruh Pelatihan Keterampilan Koping Orang Tua terhadap Kecerdasan Emosi & Keterampilan Sosial Anak. Jurnal Obsesi : Jurnal Pendidikan Anak Usia Dini, 7(5 SE-Articles), 5506–5522. https://doi.org/10.31004/obsesi.v7i5.5100 Kwartawaty, N. N., Noviana, E., & Mahardhika, G. T. (2020). Pelatihan mini MBA secara daring terhadap pekerja migran Indonesia di Taiwan. BERNAS: Jurnal Pengabdian Kepada Masyarakat, 1(4 SE-Articles), 661–666. https://doi.org/10.31949/jb.v1i4.543 Raharto, A. (2017). Pengambilan Keputusan Tenaga Kerja Indonesia (TKI) Perempuan Untuk Bekerja di Luar Negeri: Kasus Kabupaten Cilacap. Jurnal Kependudukan Indonesia, 12(1), 39–54. Rahman, R. A., Salim, A. A., & Anggriawan, R. (2021). Peran Pemerintah Indonesia dan Taiwan dalam Menanggulangi Kasus Pekerja Migran Indonesia “Kaburan.” Jurnal Wawasan Yuridika, 5(1), 81–99. https://ejournal.sthb.ac.id/index.php/jwy/article/view/414 Ramadhan, M. Z., & Amaliyah, R. (2023). Strategi indonesia dalam manajemen perlindungan pekerja migran Indonesia di Taiwan pasca new southbound policy. SIYAR Journal, 3(1 SE-Articles), 74–90. https://doi.org/10.15642/siyar.2023.3.1.74-90  
Comparative Analysis of SMK Students' Understanding of Electrochemistry Through Laboratory-Based and Virtual Laboratory-Based Learning Modalities Alvin Annayya Habibah; Hartinah Pratiwi; Kurnia Larasati; Anugrah Ricky Wijaya
J-PEK (Jurnal Pembelajaran Kimia) Vol. 10 No. 2 (2025): J-PEK (JURNAL PEMBELAJARAN KIMIA)
Publisher : Department of Chemistry, Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977//um026v11i12026p001

Abstract

This study investigates the comparative effectiveness of Lab-Based Learning (LBL) and Virtual Lab-Based Learning (VLL) models in enhancing electrochemistry comprehension among Vocational High School (SMK) students. Employing a quasi-experimental, pre-test-post-test non-equivalent control group design, the research involved two groups of Industrial Chemistry students, each subjected to either LBL or VLL instructional methods. Data collection instruments included a concept understanding test and a student perception questionnaire. Initial assessments indicated similar baseline understanding, with pretest mean scores of 39.00 across all participants. Post-intervention results demonstrated significant improvements in both groups: the VLL group's mean score increased from 39.67 to 80.47, while the LBL group's mean rose from 38.33 to 88.67. Statistical analysis confirmed that both models effectively enhanced students' electrochemistry understanding, with the LBL group exhibiting a greater mean increase. Student perceptions further revealed a preference for the LBL model, citing increased engagement and ease of comprehension. These findings suggest that, despite the advantages of virtual laboratories, authentic laboratory experiences remain more effective for vocational students in mastering complex electrochemical concepts.
Comparison of Vocational Students’ Conceptual Understanding in Acid-Base Titration Using Virtual Lab-Based Learning and Lab-Based Learning with Chemical and Natural Indicators Hartinah Pratiwi; Alvin Annayya Habibah; Kurnia Larasati; Anugrah Ricky Wijaya
J-PEK (Jurnal Pembelajaran Kimia) Vol. 10 No. 2 (2025): J-PEK (JURNAL PEMBELAJARAN KIMIA)
Publisher : Department of Chemistry, Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977//um026v11i12026p001

Abstract

This study compared the effectiveness of Virtual Lab-Based Learning (VLL) and Lab-Based Learning (LBL) in improving students’ conceptual understanding of acid-base using chemical and natural indicators. A quantitative quasi-experimental design with a pretest-posttest control group was implemented involving 30 vocational high school students from the Industrial Chemistry program at SMK PGRI 3 Malang, divided equally into two groups. The LBL group conducted hands-on laboratory experiments, while the VLL group utilized the ChemCollective virtual simulation platform. Both groups studied the same topic with equal instruction time and guidance from the same teacher. The results indicated that both learning models significantly improved students’ conceptual understanding of acid-base titration, with the LBL group achieving a higher post-test increase (74.06%) than the VLL group (62.26%). This suggests that direct laboratory practice fosters greater procedural accuracy, conceptual comprehension, and cognitive engagement. However, VLL remains a useful alternative for schools with limited laboratory access, providing an interactive means for students to visualize titration steps, color changes, and pH variations. The incorporation of natural pigments from red cabbage and hibiscus further enhanced student interest and contextual learning outcomes. Despite these promising results, the limited sample size constrains the generalization of findings, and future studies with larger, more diverse samples are recommended to validate the consistency of these results across broader educational contexts.
Batik Science Demonstration Program (PODESABA) for the Enlightened Generation at the Sanggar Muhammadiyah in Kampung Baru, Kuala Lumpur, Malaysia Anugrah Ricky Wijaya; Aman Santoso; Eli Hendrik Sanjaya; Dima Vici Nadia Ariefianti; Intan Ainul Malik; Dewinta Yuka Siwi; Fatmah Khairani; Novida Pratiwi; Ratna Yunita Setiyani Subardjo; Ahmad Sururi
J-PEK (Jurnal Pembelajaran Kimia) Vol. 10 No. 2 (2025): J-PEK (JURNAL PEMBELAJARAN KIMIA)
Publisher : Department of Chemistry, Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977//um026v11i12026p001

Abstract

The Batik Science Demonstration Program (PODESABA) for the Enlightened Generation was conducted by the Department of Chemistry's community service team at Sanggar Muhammadiyah, Kampung Baru, Kuala Lumpur, Malaysia, in 2025. This international community service initiative aimed to introduce fundamental chemistry concepts through culturally contextualised learning, enhancing students' scientific literacy and creativity. The program comprised four main sessions: (1) a redox reaction demonstration using Betadine solution and citrus juice to visualize vitamin C presence, (2) a simple paper chromatography experiment to illustrate separation techniques, (3) an ecoprint batik workshop utilizing plant-based dyes and alum solution as a natural mordant, and (4) a jumput (tie-dye) batik activity using natural dyes. Each activity was designed to be interactive and culturally relevant, enabling participants to connect scientific principles with traditional batik-making practices. The program yielded positive outcomes, including heightened enthusiasm and active participation among children, improved comprehension of redox and separation concepts, and the creation of innovative batik products. This initiative successfully integrated science and art, embodying the spirit of The Enlightened Generation through cross-cultural collaboration and exchange.
Analysis of the Development of Chemistry Analysis Try-Out Questions and Their Impact on the Graduation of Professional Teacher Education (PPG) Students Anugrah Ricky Wijaya; Nur Atikah
J-PEK (Jurnal Pembelajaran Kimia) Vol. 11 No. 1 (2026): J-PEK (Jurnal Pembelajaran Kimia)
Publisher : Department of Chemistry, Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977//um026v11i12026p001

Abstract

This study describes the development of try-out questions for Professional Teacher Education (PPG) students in Chemical Analysis at Universitas Negeri Malang. The try-out questions, consisting of 35 Pedagogical Content Knowledge (PCK) questions, were designed to assess students' understanding of chemistry analysis and their ability to apply it in real-world scenarios. The development process involved integrating Question Analysis Materials, Subject Matter Study Materials, and Cognitive Level of Questions to create relevant and challenging questions. Expert feedback was incorporated to revise and improve the questions, resulting in a low error rate of 5% for the Chemical Analysis set questions. The try-out questions demonstrated promising results, with a 100% pass rate for PPG students in Chemical Analysis.
Co-Authors Abdillah Al Farraby Ahmad Sururi Ahmad Taufiq Alif Alfarisyi Syah Alvin Annayya Habibah Alvin Annayya Habibah Aman Santos Aman Santoso Amara, Aulia Angga Dheta Shirajjudin Aji Anggarani, Dinar Arsy Anie Yulistyorini Arabillah, Zulfikar Wildan Ayub Indra Bayu Kreshna Adhitya Sumarto Choiril Azmiyawati Daratu Kusuma Eviana Putri Dewi Yuliani, Dewi Dewinta Yuka Siwi Dhinarty Umi Rachmawaty Dian Puspita Sari Dima Vici Nadia Ariefianti Dima Vici Nadia Ariefianti Eli Hendrik Sanjaya Endang Budiasih Estiyawati, Estiyawati Fadhil Md Din, Mohd Farashinta Nadia Fatmah Khairani Hanumi Oktiyani Rusdi Harno Dwi Pranowo Hartinah Pratiwi Hartinah Pratiwi Hendra Susanto Hengky Pamungkas, Yahya Hong Chen I Wayan Dasna Indah Nur Pramesti Intan Ainul Malik Jayawarsa, A.A. Ketut Khoiril Amin Kurnia Larasati Kurnia Larasati Kusfianti, Anisa Aulia Kusumaningrum, Irma Kartika Li, Yu-You Maharani, Chariztya Anggita Mohd Hafiz Dzarfan Othman Muhammad Roy Asrori Muntholib Munzil Nanik Wijayanti Nor Basid Adiwibawa Prasetya Novida Pratiwi Noviyanti, Thjiong Angelina Nur Atikah Nurbani Jusuf Nurwarrohman Andre Sasongko Parsaoran Siahaan Purwandari, Intan Diah Puspa Rahmadina Lestari Putra, Helwani Fuadi Sujoko Rachman, Ihsan Budi Rachmawaty, Dhinarty Umi Ratna Yunita Setiyani Subardjo Retno Ariadi Lusiana Retnosari, Rini Rizky, M Salsabila, Arini Suharti Sumari Sumari Surjani Wonorahardjo Syah, Alif Alfarisyi Syavika, Lukluatus Wulan Ratia Ratulangi Yudhi Utomo Yusron Risqy Maulana Zahra Firdaus