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All Journal Penelitian Pendidikan Jurnal Ilmu Dasar Jurnal Penelitian Pendidikan IPA (JPPIPA) JURNAL PENDIDIKAN TAMBUSAI Eksakta : Berkala Ilmiah Bidang MIPA Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika Phydagogic : Jurnal Fisika dan Pembelajarannya Journal of Innovative Physics Teaching (JIPT) Journal of Civil Engineering and Vocational Education Journal of Experimental and Applied Physics Inventa: Journal of Science, Technology, and Innovation Research on Instrumentation
Riri Jonuarti
Universitas Negeri Padang
Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Transportation Other

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Pengaruh Variasi Temperatur dan Waktu Pembakaran Eceng Gondok terhadap Kadar Silika dan Sifat Mekanik Beton Silika Yulifarma, Rika; Jonuarti, Riri; Yohandri, Yohandri; Jhora, Fadhila Ulfa
Jurnal Pendidikan Tambusai Vol. 9 No. 2 (2025): Agustus
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v9i2.31030

Abstract

Penelitian ini mengevaluasi pengaruh suhu dan waktu pembakaran eceng gondok terhadap ukuran partikel, pola difraksi amorf, kandungan silika, serta pengaruhnya terhadap kuat tekan, densitas, dan sudut kontak beton. Abu eceng gondok yang kaya silika dapat digunakan sebagai bahan tambahan beton karena sifatnya yang pozzolan, meningkatkan kekuatan dan daya tahan. Penelitian ini menggunakan suhu 500°C dan 600°C dengan waktu pembakaran 90 dan 150 menit. Analisis Scanning Electron Microscope (SEM) menunjukkan nanopartikel eceng gondok berukuran kurang dari 1 nm. X-Ray Diffraction (XRD) menunjukkan pola amorf dengan puncak pada 2θ sekitar 21,8°. X-Ray Fluorescence (XRF) menunjukkan bahwa pembakaran pada suhu 600°C selama 150 menit menghasilkan kandungan silika tertinggi sebesar 84,96%. Dengan demikian, kondisi optimal adalah 600°C selama 150 menit. Beton dengan abu ini menunjukkan penurunan kuat tekan sebesar 0,7% (di bawah 1%), namun kekuatannya meningkat pada umur 14 hari, memenuhi standar mutu. Sudut kontak beton silika berumur 14 hari adalah 98,663°, dan densitas beton normal mencapai 2354,077 kg/m³. Oleh karena itu, penggunaan abu eceng gondok dalam produksi beton layak dan menguntungkan.
Optimalisasi Potensi Wisata Desa Lumindai Kota Sawahlunto Sumatera Barat dengan Meningkatkan Kesadaran Masyarakat terhadap Sumber Daya Alam dan Seni Budayanya Hamdi Rifai; Ihsania Ikrima Kinanti; Riri Jonuarti; Yulhendri Yulhendri; Yenni Darvina; Harman Amir; Rifi Wasrika; Fadilla Septiani; Gustika Yonanda; Retna Junia; Chairunnas Chairunnas; Syair Nandi
ABDI: Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 7 No 3 (2025): Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat
Publisher : Labor Jurusan Sosiologi, Fakultas Ilmu Sosial, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/abdi.v7i3.1379

Abstract

Lumindai merupakan salah satu geosite dari Geopark Nasional Sawahlunto dengan potensi wisata alam seperti Hutan Batu, Gua Batu Kudo, Puncak Panjaringan, dan Air Terjun Batimpo yang dikelola oleh pemerintah daerah melalui POKDARWIS Talawi Hilie. Namun, karena kurangnya kesadaran masyarakat terhadap keunikan alam dan budaya mereka sendiri yang menjadi dasar dari suatu objek wisata serta keterbatasan dalam pengelolaan pariwisata, pemasaran dan sistem informasi, sehingga belum meningkatkan jumlah kunjungan turis dan memberikan dampak ekonomi yang signifikan bagi masyarakat Lumindai. Tujuan dari kegiatan ini adalah meningkatkan kesadaran masyarakat dan pemerintahan Desa Lumindai dengan cara menggali dan mempelajari potensi wisata (Alami dan Kebudayaan) Desa Lumindai agar dapat meningkatkan kesejahteraan masyarakat setempat. Penggalian potensi ini menggunakan teknik participatory action research (PAR) dan pengumpulan data menggunakan observasi, wawancara, dan dokumentasi. Dari hasil penggalian potensi diketahui bahwa didapatkan keunggulan alam, seni, budaya, dan kuliner. Dari segi potensi alam, Desa Lumindai memiliki objek wisata Hutan Batu, Gua Batu Kudo, Puncak Panjaringan, dan Air Terjun Batimpo. Sektor kesenian, Desa Lumindai memiliki berbagai jenis kesenian khas yang mencerminkan budaya setempat, seperti Silek Sitaralak, Barsanji, Randai, Salawat Dulang, Dabuih, Dikia Rabana, dan Tenun Songket. Sektor pertanian, desa ini memiliki potensi perkebunan tembakau berkualitas tinggi dan pohon aren penghasil nira yang menjadi bahan pembuatan gula aren. Sedangkan potensi kuliner Desa Lumindai menawarkan beragam makanan dan minuman. Hasil ini menunjukkan bahwa Desa Lumindai memiliki potensi yang besar untuk dikembangkan sebagai destinasi wisata, taman pendidikan (education park atau edupark) dan sumber ilmu pengetahuan.
Validity of Heat Teaching Material Integrated Joyful Learning to Promote Student’s Creative Thinking Skills Yasni, Yuli; Asrizal, Asrizal; Amir, Harman; Jonuarti, Riri
Journal of Innovative Physics Teaching Vol. 3 No. 2 (2025): Journal of Innovative Physics Teaching (JIPT)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jipt/vol3-iss2/110

Abstract

The development of education in the 21st century demands teachers to innovate by integrating technology into the learning process and fostering students’ creative thinking skills. However, preliminary studies revealed that students’ creative thinking abilities remain low, and the existing teaching materials have not fully supported joyful and engaging learning. This study aims to determine the validity level of a digital learning material on the topic of heat, integrated with the Joyful Learning approach to enhance students’ creative thinking skills in senior high school. The research employed a Research and Development (R&D) method using the Hannafin and Peck model, which consists of three stages: need assess, design, and develop/implement. The research instrument used was a validity questionnaire to assess the feasibility of the developed digital material. The results showed that the digital learning material achieved a validity score of 0.95, categorized as highly valid. Therefore, the developed digital material on heat integrated with Joyful Learning is considered valid and feasible for physics learning to foster students’ creative thinking skills.
A Groundwater Quality Monitoring System Using IoT and GPS Sally Lerian Edward; Riri Jonuarti; Mona Berlian Sari
Research on Instrumentation Vol. 2 No. 2 (2025): Research on Instrumentation
Publisher : RESSTECH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.66926/rins.2025.23

Abstract

Conventional groundwater quality monitoring methods are often inefficient due to delays in data acquisition and limitations in spatial location tagging and automated data management. This study aims to develop a portable monitoring system based on NodeMCU ESP32 that is capable of measuring temperature, pH, TDS, and conductivity parameters in situ. The main innovation of this tool lies in the integration of a GPS module for mapping sample collection locations, automatic data storage to spreadsheets via an IoT platform, and a visual LED warning system calibrated according to the quality standards of PerMenKes No. 32 of 2017. Test results show that the system functions optimally with parameter accuracy levels reaching 95-99% and an error rate below 5% compared to standard measuring instruments. This system offers an effective solution for rapid, accurate, and digitally documented groundwater quality mapping
Sintesis dan Karakterisasi Material Beton Hidrofobik dan Self Healing Berbasis Mikroorganisme Yulia Maulida; Ratnawulan; Riri Jonuarti; Harman Amir
Jurnal Penelitian Pendidikan IPA Vol 9 No 12 (2023): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i12.5841

Abstract

The high water absorption of concrete causes the concrete to easily experience cracking and damage. One way to increase the durability of concrete is by adding microbes which can fill the micro cavities in the concrete with the resulting Calcium Carbonate (CaCO3) deposits. However, the weakness of using microorganisms is that they are unable to withstand high hydration heat. Therefore, by varying the temperature in this research, it is possible to determine the effect of the metabolism of the bacteria produced. This research was carried out to avoid damage by creating a hydrophobic and self-healing layer which helps increase the durability and strength of the concrete. The concrete sample made resembles a cube measuring 5 cm x 5 cm x 5 cm. The manufacturing materials are Portland cement, Otawa sand, distilled water and a mixture of E. coli bacteria. Heating was carried out using an oven at temperatures of 30, 60, 90, and 120 oC. Characterization testing was carried out using a Cpmreson machine, XRD and contact angle testing.
Pengaruh Komposisi Nanosilika Terhadap Kinerja Mekanik Aspal Hibrida Berbasis Mikroorganisme Muhamad Khalid Khadafi; Ratnawulan Ratnawulan; Riri Jonuarti; Syafri Syafri
Journal of Science, Technology, and Innovation Vol 1 No 3 (2026): : April: Inventa: Journal of Science, Technology, and Innovation
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/d4fyrk95

Abstract

The decline in pavement performance due to increasing traffic loads necessitates the development of advanced materials beyond conventional asphalt mixtures. This study investigates the effect of nanosilica composition on the mechanical performance of hybrid Asphalt Concrete-Wearing Course (AC-WC) modified with Escherichia coli as a biomineralization agent. The mixture was prepared using a fixed asphalt content of 6% and nanosilica variations of 0%, 3%, 5%, and 9% by asphalt weight, combined with bacterial concentration of 10³ cells/mL. Marshall testing was conducted in accordance with Bina Marga 2018 Revision 2 specifications. The results indicate that nanosilica addition leads to a gradual decrease in density from 2.472 to 2.453 g/cm³, while significantly increasing stability from 1,094 kg to 1,560 kg. Flow values ranged between 3.90 and 4.20 mm, with higher compositions exceeding specification limits. The 5% nanosilica composition demonstrated the most balanced performance across all parameters. The synergistic interaction between nanosilica and bacterial activity enhances interparticle bonding, offering a promising approach for developing durable and sustainable asphalt materials.
Pengaruh Variasi pH HCL dalam Pengasaman Montmorillonit Terhadap Hasil Bleaching Crude Palm Oil Tiara Fatika Sari; Riri Jonuarti
Journal of Science, Technology, and Innovation Vol 1 No 3 (2026): : April: Inventa: Journal of Science, Technology, and Innovation
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/hjv1kg76

Abstract

Crude Palm Oil (CPO) requires a bleaching process to reduce pigments and free fatty acids (FFA). Montmorillonite as an adsorbent needs acid activation to improve its adsorption capacity. This study aimed to investigate the effect of HCl activation at pH 2, 4, and 6 on the surface morphology of montmorillonite as characterized by Scanning Electron Microscopy (SEM) and its influence on CPO bleaching efficiency. Acid activation was performed using 0.01 M HCl with a slurry titration method. Particle size analysis was conducted using ImageJ software with the length parameter. Results showed that unactivated montmorillonite had a mean particle length of 1054.54 nm with dense and agglomerated morphology. Activation at pH 4 produced the most homogeneous particle distribution with a mean length of 1635.57 nm and a more open surface structure. Bleaching analysis demonstrated that montmorillonite activated at pH 4 generated the lowest FFA content of 1.4% compared to pH 2 and pH 6. These findings indicate that pH 4 activation provides the optimum balance between structural stability, pore opening, and adsorption effectiveness for CPO bleaching.    
Pengaruh Pelapisan Kaolin Pada Titanium Dioksida (TiO2) dan Zinc Oksida (ZnO) Terhadap Aktivitas Fotokatalitik Lapisan Tipis Okta Khairina; Riri Jonuarti
Journal of Science, Technology, and Innovation Vol 1 No 3 (2026): : April: Inventa: Journal of Science, Technology, and Innovation
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/zmkk4495

Abstract

Titanium dioxide (TiO₂) and zinc oxide (ZnO) are widely applied as broad-spectrum ultraviolet protective agents; however, nanoscale modification that improves optical transparency may simultaneously increase photocatalytic activity and reactive oxygen species (ROS) generation. This study investigated the effect of kaolin coating on the photocatalytic behavior of TiO₂ and ZnO thin films fabricated through spin coating. Nanoparticles were reduced to sizes below 150 nm using high-energy ball milling and deposited into sandwich-structured nano-kaolin/TiO₂ and nano-kaolin/ZnO films with weight ratios of 0%:100% and 50%:50%. Photocatalytic performance was evaluated through methylene blue degradation under ultraviolet irradiation for 5 h at 664 nm. Pure TiO₂ and ZnO exhibited high photocatalytic degradation efficiencies of 72.77% and 68.51%, respectively. Incorporation of 50% kaolin significantly reduced degradation efficiencies to 22.10% for TiO₂/kaolin and 23.69% for ZnO/kaolin. Kaolin contributed to initial physical adsorption while suppressing ROS formation through active-site coverage and controlled charge-transfer pathways. The resulting sandwich-structured thin films demonstrated improved optical stability, reduced photocatalytic aggressiveness, and promising potential as multifunctional UV-protective nanomaterials for safer sunscreen-related applications.    
Pengaruh Jenis Asam Mineral Pada Sintesis Acid Activated Montmorillonite Terhadap Struktur, Morfologi, dan Performa Bleaching Earth Hanifah Sriamelia; Riri Jonuarti
Journal of Science, Technology, and Innovation Vol 1 No 3 (2026): : April: Inventa: Journal of Science, Technology, and Innovation
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/qjnaem59

Abstract

Montmorillonite (MMT) is a clay mineral belonging to the smectite group, characterized by a large surface area, high cation exchange capacity, and a layered structure, making it a promising bleaching earth for palm oil refining. However, natural montmorillonite exhibits limitations, including a low number of active sites and limited porosity, thus requiring acid activation to enhance its performance. This study aims to analyze the effect of different mineral acids on the crystal structure, morphology, and bleaching performance of acid-activated montmorillonite. Activation was carried out using HCl, H₂SO₄, HNO₃, and H₃PO₄ at a concentration of 1 M for 3 hours. Characterization was conducted using X-ray diffraction (XRD) to determine crystallinity, scanning electron microscopy (SEM) to observe surface morphology, and UV–Vis spectrophotometry to evaluate bleaching performance. The XRD results revealed that sulfuric acid produced the largest crystal size (78.8 nm) with the highest degree of homogeneity. Activation with HCl resulted in a crystal size of 64.5 nm, H₃PO₄ yielded 68.3 nm, and HNO₃ produced 68.5 nm. SEM analysis showed the formation of new pores and a rougher surface texture after activation. HCl activation yielded the most favorable surface morphology. Bleaching tests demonstrated a significant reduction in color intensity and β-carotene content in palm oil.  
Co-Authors Afrilla, Sonya Ahmad Fauzi Ambran Hartono Angraini, Sri Arni Sopianti Asrizal Azzahra, Zakia Cahyaningrum, Wahyu Chairunnas Chairunnas Desti Yuspita Sari Doni, Monica Anatasya Fadhila Ulfa Jhora Fadilla Septiani Fanny Rahmatina Rahim Fatni Mufit Fuad Sofaturahman Gusnedi Gusnedi Gusnedi, - Gustika Yonanda Hamdi Rifai Hanifah Sriamelia Harman Amir Hidayati Hidayati Hidayati Hidayati Ihsania Ikrima Kinanti Intan Purnama Yani Ismira, Ismira Jhora, Fadhilla Ulfa Kasih Syirpia Lia Rifka Septiana Maharani, M Maritza Syalsabilla Masni Yanti, Meri Mira Syuriyani Mona Berlian Sari Muhamad Khalid Khadafi Nadia Raisa Aryani Nawiyah, Nawiyah Nurwijayanti Okta Khairina Pertama, Indri Saputri Putri, Sri Fany Mulya Rahmadani, Tika Rahmat Hidayat Rahmat Hidayat Raisa, Nadia Ramli Ramli Ratna Wulan Ratnawulan Ratnawulan . Retna Junia Rifi Wasrika Rifka, Lia Rita Iranie Sally Lerian Edward Salsabilla, Salsabilla Sofaturrohman, Fuad Syafika, Herma Syafri Syafri Syafri, Syafri Syair Nandi Syalsabilla, Maritza Syuriyani, Mira Tiara Fatika Sari Ulfa Jhora, Fadila Vitrini, Nora Wardatul Ullya Yasni, Yuli Yenni Darvina Yohandri Bow Yulhendri Yulhendri Yulia Maulida Yuliana, Yuli Yuliani, Kurnia Dwi Yulifarma, Rika Yuliza Noerman, Kiki Yurnetti, Yurnetti Zahra, Hayatun Nufus