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All Journal Jurnal Fisika Unand Magnetic: Research Journal of Physics and It’s Application
Yunita Enzelina Silaban
Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Palangka Raya
Astronomy Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Analisis Efektivitas Filtrasi Sederhana terhadap Kualitas Fisik-Kimia Air Sumur Bor dan Sungai Kahayan untuk Mitigasi Dampak Lingkungan Yunida Iashania; Reni Agustiani; Asri Fridtriyanda; Valentinus Waruwu; Yunita Enzelina Silaban
Jurnal Fisika Unand Vol 15 No 2 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.2.140-146.2026

Abstract

The purpose of this study was to determine the effectiveness of the filter before and after filtration so that the water complies with water quality standards. The research method used a quantitative method with a field and laboratory experimental approach to test changes in air quality after going through a filtration process using a simple system designed. Based on research obtained from the laboratory, there was an increase in the effectiveness of well water quality of 95.65%, dissolved manganese (mn) of 83.87%, the color looked clearer with an increase of 68.47%, dissolved iron (Fe) of 14.63%, air acidity (pH) of 7.16%, nitrite (NO2) of 1.43%. While for river water the TSS value was 40.82%, dissolved oxygen (DO) of 121.03%, chemical oxygen demand (COD) of 14.16%, biological oxygen demand (BOD) of 12.82% and an increase in pH of 4.17%. The filter designed in this study is effective for use in water wells because it is able to filter and improve the quality of groundwater because it complies with water quality standards, namely PP No. 22 of 2021, while for river water it is still less effective in addressing air quality, especially in TSS and BOD values.
Rancang Bangun Prototipe Sistem Pencitraan Bawah Tanah dengan Metode Electrical Resistence Tomography Yunus Pebriyanto; Wilson Jefriyanto; Yoan Theasy; Yunita Enzelina Silaban; Salsa Ayudhia Pratama
Magnetic: Research Journal of Physics and It’s Application Vol. 6 No. 1 (2026): Magnetic: Research Journal of Physics and It’s Application
Publisher : Program Studi Fisika - Universitas San Pedro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59632/magnetic.v6i1.755

Abstract

Electrical Resistivity Tomography (ERT) is a geophysical method used to image subsurface structures based on the distribution of material resistivity by injecting electrical current and measuring the resulting potential at the surface. Although widely applied in subsurface exploration, the use of ERT in academic environments is still limited due to the high cost of commercial equipment. Therefore, this study aims to design and develop a laboratory-scale prototype of a subsurface imaging system based on the ERT method as an educational and practical learning tool. The research employed a Research and Development (R&D) method combined with an experimental approach, including the stages of design, fabrication, testing, and calibration of the prototype. Experimental measurements were conducted on homogeneous soil media and soil media with artificial anomalies using Wenner and Wenner–Schlumberger configurations. The acquired data were processed using RES2DINV software to produce two-dimensional subsurface images. The results indicate that the developed prototype is capable of detecting resistivity anomalies effectively, although relatively high inversion errors were observed due to laboratory-scale limitations. Overall, the proposed ERT prototype is suitable as a supporting tool for geoelectrical learning and subsurface exploration practicum.
Co-Authors Asri Fridtriyanda Reni Agustiani Salsa Ayudhia Pratama Valentinus Waruwu Wilson Jefriyanto Yoan Theasy Yunus Pebriyanto