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Pengolahan Limbah Palm Oil Mill Effluent (POME) Menggunakan Katalis ZnO dengan Penambahan CU untuk Meningkatkan Kinerja Fotokatalitik Ferdika Nanda Maulana; Selastia Yuliati; Yuniar Yuniar
Jurnal Sains dan Ilmu Terapan Vol. 8 No. 2 (2025): Jurnal Sains dan Ilmu Terapan
Publisher : Politeknik Kampar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59061/jsit.v8i2.1193

Abstract

Over time, the yield of oil palm had continued to increase each year, which was followed by a rise in the amount of waste produced. One of the main wastes from palm oil processing was liquid waste, commonly known as Palm Oil Mill Effluent (POME). This study aimed to obtain a ZnO/Cu catalyst and to determine the optimal catalyst weight and irradiation time to reduce COD, TSS, and pH values. The ZnO/Cu catalyst was synthesized using the co-precipitation method and was applied through a photocatalytic process, which utilized catalysts and ultraviolet (UV) light. The catalyst was applied to POME with ZnO weight variations of 100 mg, 150 mg, and 200 mg, and UV irradiation times of 30, 60, 90, 120, and 150 minutes. The best result was obtained at a catalyst weight of 200 mg and an irradiation time of 150 minutes, resulting in COD of 216 mg/L, TSS of 20.00 mg/L, and pH of 7.39, which met the wastewater quality standards.
Analisis Sikap Intoleran Dikalangan Peserta Didik Di SMP Negeri 4 Lalan Siti Nurinayah; Yuniar Yuniar; Ibnu Rozali
JURNAL ILMIAH PENELITIAN MAHASISWA Vol 3 No 6 (2025): Desember
Publisher : Kampus Akademik Publiser

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61722/jipm.v3i6.1588

Abstract

This study aims to analyze intolerant attitudes among students at SMP Negeri 4 Lalan, as well as identify the causal factors and solutions to overcome them. The main problem found is the persistence of intolerant behavior such as judging each other, a lack of mutual assistance, and teasing among peers. This study used a qualitative method with a descriptive approach. Data collection techniques were carried out through observation, interviews, and documentation with informants consisting of homeroom teachers, PPKn teachers, and student representatives. The results of the study indicate that intolerant attitudes arise due to internal factors, such as students' limited understanding of diversity, as well as external factors, such as the influence of the family environment, peers, and social media. These attitudes negatively impact the learning climate and character development of students. Solutions offered include instilling an attitude of tolerance from an early age and implementing cooperative learning in the classroom. Both approaches are considered effective in building empathy, mutual respect, and an inclusive school environment. Thus, education plays a crucial role in preventing the growth of intolerant attitudes and shaping a generation that values differences
The Effectiveness of AI-Based Application Duolingo in Enhancing Students’ Vocabulary Mastery among Indonesian EFL Learners Yuniar Yuniar; Syawal Syawal; Hijrah Hijrah
Sintaksis : Publikasi Para ahli Bahasa dan Sastra Inggris Vol. 4 No. 1 (2026): Sintaksis : Publikasi Para ahli Bahasa dan Sastra Inggris
Publisher : Asosiasi Periset Bahasa Sastra Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/sintaksis.v4i1.2463

Abstract

This study aims to determine the effectiveness of the use of the artificial intelligence-based application (AI-Based Application) Duolingo in improving vocabulary mastery of EFL (English as a Foreign Language) students in Indonesia. This study used a descriptive quantitative approach with a single-group pre-test and post-test design involving 20 students of class VII C of SMP Negeri 1 Mappakasunggu. Data were collected through vocabulary tests, questionnaires, and classroom observations. The results showed a significant increase in students' vocabulary mastery, marked by an increase in the average score from 61 (fair category) in the pre-test to 78 (good category) in the post-test. Most students gave a positive perception of the use of Duolingo, especially regarding the gamification features, instant feedback, and simple and attractive display, which can increase motivation and learning engagement. The results of the observation also showed that students were more active and enthusiastic in using this application compared to traditional learning methods. Thus, Duolingo can be said to be effective as an AI-based learning medium to improve vocabulary mastery of junior high school students in Indonesia. Â