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All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal Pengabdian UntukMu NegeRI JURNAL PHOTON DEVOTE: Jurnal Pengabdian Masyarakat Global Borneo Nursing Journal
Prasetya
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences And Health, Universitas Muhammadiyah Riau, Pekanbaru|Universitas Muhammadiyah Riau|Indonesia
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Karakterisasi Hasil Sintesis Fotokatalis TiO2 Dengan Metode Sol-Gel dan Hidrothermal Untuk Aplikasi Limbah Petroleum Manja Nanda Resa Manja; Hasmalina Nasution; Zumrotun Nasihah; Tengku Finalia; Laila Rahmadanis; Prasetya Prasetya; Rahmadini Syafri; Sri Hilma Siregar
Sistem Informasi Vol 12 No 2 (2022): Jurnal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jp.v12i2.3473

Abstract

Petroleum waste (crude oil) has become one of the sources of pollution in the sea. The pollution caused comes from several factors, oil spills from tankers, deliberate disposal of irresponsible industries. The layer of crude oil on the surface of the air holds back gas exchange from the atmosphere and reduces the solubility of oxygen in the waters so that it interferes with the respiration and photosynthesis processes in phytoplankton which are food producers in the sea. This study aims to characterize the synthesized TiO2 photocatalyst material using two methods, namely Sol-Gel (SG) and Hydrothermal (HD) which will then be used for applications in petroleum waste. To determine effectiveness of TiO2 photocatalyst in reducing crude oil spills on the sea surface based on fatty oil parameter tests. The synthesis of TiO2 was carried out by the solgel method (SG) and the hydrothermal method (HD) at various temperatures of 300 oC, 500 oC, and 700 oC. Characterization of the material formed using the SEM-EDX instrument, showed that in general it is spherical in shape, and is composed of C, O and Ti elements. The maximum effectiveness of SG-300, SG-500, and SG-700 was able to reduce fat oil content by 57.19%, 66.14% and 41.42% while HD-300, HD-500, and HD-700 were able to reduce fatty oil content. maximum of 60.87%. , 56.41% and 45.68% in the 120 minute irradiation time. The results showed that the photodegradation process in petroleum waste treatment using TiO2 material was able to reduce the fat oil content.
Titanium Dioxide (TiO2) Modified Bentonite for Photodegradation in Methylene Blue Dye Sri Hilma Siregar; Prasetya Prasetya; Norramizawati Norramizawati; Marlian Marlian; Aulia Rizki Ramadhanti
Jurnal Kimia Sains dan Aplikasi Vol 26, No 4 (2023): Volume 26 Issue 4 Year 2023
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.26.4.143-150

Abstract

Dye is one of the waste waters, which will be a problem if the content is excessive in the water. Modifying bentonite with titanium dioxide (TiO2) as a photocatalyst for removal of dye waste. In this study, composite synthesis was carried out by mixing bentonite and TiO2 suspensions. The mass of bentonite is 20 g, and the mass variations of TiO2 are 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%. The resulting composite was heated using a furnace at 550°C for 5 hours. Bentonite-TiO2 composites were characterized using Fourier Transform Infrared, X-Ray Diffraction, and Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX). Photodegradation of methylene blue dye with bentonite-TiO2 was carried out by varying the mass of bentonite-TiO2 photocatalysts (0.02, 0.04, 0.06, 0.08 g); variations in pH (1, 3, 5, 7, and 9), and variations in UV irradiation time (30, 60, 90, and 120 minutes). The results of characterization with FTIR showed the presence of Ti-O-Ti vibrations at wavenumber 1419 cm-1 and Si-O-Ti at wave numbers 780 cm-1 and 799 cm-1. Characterization of 20% bentonite-TiO2 by XRD showed rutile, anatase, and montmorillonite phases. The SEM-EDX bentonite-TiO2 characterization results produced some small particles with a layered structure with TiO2 particles clumping and still in the form of agglomerates, and the EDX results showed the chemical composition of Si and Ti. The results of photodegradation showed that the best activity for the bentonite-TiO2 composite occurred in photocatalyst BT-20% with a mass of 0.08 g, pH 1, and UV irradiation time of 120 minutes with methylene blue 99.942% degraded.
EVALUASI PRAKTIKUM KIMIA UNTUK GURU SEKOLAH MENENGAH SE-RIAU: KAJIAN KEPUASAN DAN PENGUATAN KOMPETENSI PRAKTIS Meidita Kemala Sari; Hasmalina Nasution; Sri Hilma Siregar; Prasetya Prasetya; Jufrizal Syahri; Rahmiwati Hilma; Rahmadini Syafri; Desi Asda Mora; Putri Apriliani Khorely
Devote: Jurnal Pengabdian Masyarakat Global Vol. 5 No. 2 (2026): Devote : Jurnal Pengabdian Masyarakat Global, June 2026
Publisher : LPPM Institut Pendidikan Nusantara Global

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55681/devote.v5i2.6039

Abstract

The Assisted School Program, launched by the Department of Chemistry at Universitas Muhammadiyah Riau (UMRI), aims to enhance the laboratory skills of high school chemistry teachers in Riau Province. The program addresses the need for stronger practical skills and a better understanding of laboratory safety, given limited access to modern equipment and current experimental methods in schools. Its primary goal is to provide teachers with technical and pedagogical competencies through project-based laboratory training in Laboratory Safety, Volumetric Analysis, Gravimetric Analysis, UV-Vis Spectrophotometry, and Adsorption.The program combined theoretical lectures, hands-on laboratory demonstrations, and pre- and post-test evaluations to measure knowledge gains. Twenty chemistry teachers from different schools in Riau participated. Results showed a significant improvement in post-test scores and high satisfaction levels. The overall service quality received an average rating of 4.95 out of 5, with the UV-Vis Spectrophotometry and Adsorption session achieving the highest satisfaction score of 4.80. No significant differences were found among schools, indicating the program’s equitable impact. These results demonstrate that the Assisted School Program effectively improves teachers’ professional competence, promotes safer, more modern laboratory practices, and provides a strong foundation for sustainable collaboration among universities, schools, and industry.
Edukasi Kesehatan Reproduksi Dan Gizi Remaja Sebagai Upaya Pencegahan Stunting Sarah Fitria; Nova Avianti Rahayu; Siska Indrayani; Muhammad Wildan; Lidia Sari; Priawansyah Priawansyah; Prasetya Prasetya; Aidil Haris; Muhammad Ahyarudin
Borneo Nursing Journal (BNJ) Vol. 8 No. 2 (2026)
Publisher : Akademi Keperawatan Yarsi Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61878/bnj.v8i2.1022

Abstract

Stunting merupakan permasalahan gizi kronis yang berdampak pada pertumbuhan fisik, perkembangan kognitif, dan produktivitas individu di masa depan. Pencegahan stunting perlu dilakukan sejak masa remaja, khususnya melalui peningkatan pengetahuan tentang kesehatan reproduksi dan gizi. Penelitian ini bertujuan untuk menganalisis pengaruh edukasi kesehatan reproduksi dan gizi terhadap peningkatan pengetahuan remaja sebagai upaya pencegahan stunting di Kabupaten Siak. Penelitian ini menggunakan desain quasi eksperimen dengan pendekatan one group pretest-posttest. Sampel penelitian adalah 50 remaja putri yang dipilih menggunakan teknik purposive sampling. Data dikumpulkan menggunakan kuesioner pengetahuan yang telah diuji validitas dan reliabilitasnya. Hasil penelitian menunjukkan rata-rata skor pengetahuan sebelum intervensi sebesar 56,3 meningkat menjadi 82,7 setelah intervensi. Hasil uji paired t-test menunjukkan nilai p < 0,05, yang berarti terdapat pengaruh signifikan edukasi terhadap peningkatan pengetahuan remaja. Edukasi kesehatan reproduksi dan gizi terbukti efektif dalam meningkatkan pengetahuan remaja sebagai upaya pencegahan stunting. Diperlukan implementasi program edukasi berkelanjutan di sekolah dan masyarakat untuk mendukung percepatan penurunan stunting.
Co-Authors Aidil Haris Akbar, Unggul Aulia Rizki Ramadhanti Aulia Rizki Ramadhanti Desi Asda Mora Hasmalina Nasution Hasmalina Nst Jasril Jasril Jufrizal Syahri Laila Rahmadanis Lidia Sari Manja Nanda Resa Manja Marlian Marlian Meidita Kemala Sari Muhammad Ahyarudin Muhammad Wildan Nasution, Annio Indah Lestari Norramizawati Norramizawati Nurlailli Nasution Olif Syahbella Priawansyah Priawansyah Putri Apriliani Khorely Rahayu, Nova Avianti Rahmadini Syafri Rahmiwati Hilma Rian Putra Sarah Fitria Siska Indrayani Siti Zahidah Sri Hilma Siregar Tengku Finalia Trisiwi Kusuma Ningrum Unggul Akbar Wahyuni Puspita Sanda Wirdati Irma Yeni Yernita Yuhelson Zumrotun Nasihah