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All Journal QUANTUM: Jurnal Inovasi Pendidikan Sains Journal of Mathematics Science and Computer Education
Khodizah, Ayu Tri
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Chemistry Education Mathematics Physics

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Green Remediation of Used Cooking Oil Using Sugarcane Bagasse: A Sustainable, Green Chemistry Approach Mirah Surya Dewi, Ni Pt. Pande; Khodizah, Ayu Tri
Journal of Mathematics Science and Computer Education Vol 4, No 2 (2024)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jmscedu.v4i2.14139

Abstract

Environmental pillars are the foundation of sustainable development, emphasizing waste management solutions like used cooking oil purification. This study assesses used cooking oil quality based on color, odor, water content, free fatty acids, and peroxide value after sugarcane bagasse adsorption over 1, 2, and 3 days. Using a one-group pretest-posttest design, the 3-day treatment yielded optimal results: peroxide value (5.603 meq/kg), water content (0.070%), and free fatty acids (0.13%) decreased significantly, with improved color and odor compared to the control. The study integrates green chemistry principles, including waste prevention, energy efficiency, renewable material use, chemical degradation design, and safer chemical applications. This minimizes hazardous material usage, energy consumption, and environmental impact. Spent bagasse can be transformed into valuable products like compost or biofuel, providing sustainable solutions for managing used cooking oil waste, while reducing pollution and greenhouse gas emissions. The research offers an effective strategy aligned with Indonesia's conservation goals and green chemistry principles. It encourages public participation in local waste management, potentially inspiring innovative approaches for handling other waste types, thereby strengthening sustainability efforts.
Enhancing Students’ Science Process Skills Through PjBL in Acid-Base Titration Experiment Khodizah, Ayu Tri; Surya Dewi, Ni Pt. Pande Mirah; Langitasari, Indah; Namirah, Irah
QUANTUM: Jurnal Inovasi Pendidikan Sains Vol 16, No 2 (2025): Oktober 2025
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/quantum.v16i2.21638

Abstract

Science process skills (SPS) are essential competencies in 21st-century education. This study aimed to evaluate the effectiveness of the Project-Based acid-based titration project. A pre-experimental one-group pretest-posttest design was applied to 32 high school students in Serang City. Instruments included observation sheets and 28 essay items, validated by 10 experts using CVR (38 items retained, CVR ≥ 0.62) and tested for reliability (Cronbach's alpha = 0.542). Data were analyzed using the Shapiro-Wilk test, paired sample t-test, N-Gain, and effect size. Results showed a significant improvement in SPS, with pre- and post-test mean scores increasing from 40.00 to 74.34. The t-test yielded t(31) = -21.417, p < 0.001, and effect size was high (μ = 0.97). N-Gain analysis indicated moderate improvement in most indicators—such as planning steps (0.63), identifying patterns (0.65), and applying concepts (0.63)—but low gains in hypothesizing alternatives (0.04) and interpreting graphs (0.15). These findings suggest that PjBL is an effective strategy for developing SPS in practical chemistry contexts, preparing students for scientific reasoning and inquiry in the industrial era 4.0.
Co-Authors Indah Langitasari Irah Namirah, Irah Mirah Surya Dewi, Ni Pt. Pande Surya Dewi, Ni Pt. Pande Mirah