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    PEMBUATAN ELEKTRODA KARBON AKTIF BERBASIS CANGKANG BUAH MELINJO SEBAGAI MATERIAL UNTUK ELEKTRODA SEL SUPERKAPASITOR
    (Elfitra, 2023-12) Putri, Hardini Chania
    Biomass-based porous carbon electrodes have been widely used as a basic material for making supercapacitor cell electrodes, because its application can be applied in the long term, sustainable, renewable, easy to find and has economic value. This research used biomass melinjo fruit shell (CBM) with variations in the addition of melamine mass, namely 0, 0.1, 0.3, and 0.5 g as carbon electrodes for supercapacitor cells. The process of synthesizing supercapacitor cell electrodes is through several stages, a pre-carbonization at of 200°C, chemical activation using KOH, carbonization with gas at a temperature of 600°C and physical activation with gas at a temperature of 800°C. The highest density shrinkage value is owned by the CBM-03 sample is 56.45%.
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    PEMBUATAN ELEKTRODA KARBON AKTIF BERBASIS BIOMASSA TANDAN KOSONG KELAPA SAWIT SEBAGAI MATERIAL UNTUK ELEKTRODA SEL SUPERKAPASITOR
    (Elfitra, 2023-12) Gunawan, Firman
    Porous carbon electrodes based on biomass derivatives have been widely used as the basis for making supercapacitor cell electrodes, because their application can be applied in the long term, sustainable, renewable, easily available, and economically valuable. This research uses biomass derived from empty palm bunches (OPEFB) using ZnCl2 activator and heteroatom doping as a supercapacitor cell carbon electrode. The synthesis process of supercapacitor cell electrodes goes through several stages, namely the hydrothermal carbonization stage with a temperature of 180°C, chemical activation using ZnCl2 chemical activation using ZnCl2 , nitrogen doping as much as 3 grams, carbonization with N2 gas at a temperature of 600°C and physical activation with CO2 gas at a temperature of 800°C. The highest density shrinkage value is owned by the TKKS-M sample which is 57.344%.
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    ELEKRODA KARBON AKTIF BERBAHAN DASAR KULIT UDANG WINDU (Paneous Monodon) UNTUK APLIKASI SUPERKAPASITOR
    (Elfitra, 2023-12) Yolanda, Fingky
    Supercapacitors are potential energy storage devices that are inexpensive to maintain and environmentally friendly. Electrode materials with varying carbonization temperatures were prepared using tiger prawn shell biomass (KUW). The manufacture of carbon electrodes is carried out using several processes, namely the precarbonization process, activation with a KOH activator, carbonization process, and physical activation using CO2 gas. As a precursor through the activation process of KOH and CO2. The pore structure can be adjusted by varying the CO2 activation temperature at 600℃, 700℃, and 700℃ with the respective sample codes, namely KUW-600, KUW-700 and KUW-800. The resulting electrode has a unique and efficient structure and pore regulation and has great potential for supercapacitor applications. The highest density loss value possessed by the KUW-700 sample was 19.16%.
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    POTENSI LIMBAH BIOMASSA DAUN PALA SEBAGAI BAHAN DASAR PEMBUATAN KARBON AKTIF BERPORI
    (Elfitra, 2023-12) Andriani, Dini; Taer, Erman
    Porous carbon based on nutmeg leaf biomass waste was chosen as the basic material for making activated carbon. Porous carbon was synthesized using KOH chemical activator with varying concentrations of 0,3 M, 0,5 M, and 0,7 M to obtain optimal conditions of activated carbon. The preparation of carbon electrode samples starts from the drying stage, pre-carbonization, smoothing with mortar and ball milling, sieving using a 60 μm sieve, KOH chemical activation, carbon pellet printing, carbonization and physical activation to the optimum temperature of 850°C in an N2 and CO2 gas environment. The effect of varying the concentration of KOH activator was tested and the physical properties were compared. The results of the characterization of the physical properties of the nutmeg leaf activated carbon electrode were obtained through the calculation of the percentage of density shrinkage. Variations in the concentration of KOH activator can reduce the percentage of density of carbon pellets DP 0,3, DP 0,5, and DP 0,7 by 35,80%, 42,04%, and 42,68% respectively. Based on the characterization results, the effect of adding KOH chemical activating agent on all DP samples can increase the evaporation of impurities other than carbon which is indicated by the increase in shrinkage value.
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    PENGARUH JOULE HEATING PADA BAHAN FEROMAGNETIK VITROVAC 6025Z TERHADAP EFEK MAGNETO IMPEDANCE
    (Elfitra, 2023-11) Yani, Conita Fitri; Setiadi, Rahmondia Nanda
    "Magneto Impedance, as a promising alternative in detecting magnetic fields, has undergone rapid development in altering the electrical impedance experienced by conductors when exposed to magnetic fields. This research involves the design and implementation of a magneto impedance sensor system utilizing the Joule heating method. The sensitivity of this magneto impedance sensor system reaches approximately picoTesla, generating magnetic fields of around 100 pT. The success of the sensor system's design is evaluated based on its response to magnetic fields approaching the Earth's magnetic field scale, approximately 50 μT. This magneto impedance sensor is crafted using a core made of Vitrovac 6025Z, with a thickness of 0.04 mm and a width of 0.34 mm. The sensor's core experiences 6 varying Joule heating currents, ranging from 0 mA to 540 mA. The sensor system is subjected to testing at frequencies 100 kHz for each current variation. The magneto impedance sensor system generates output in the form of impedance and magnetic fields. The output values will be used to determine the magneto impedance ratio.
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    ANALISIS KINERJA PEMBANGKIT LISTRIK TENAGA AIR MENGGUNAKAN TURBIN VORTEX
    (Elfitra, 2023-11) Marwin, Azwir; Setiadi, Rahmondia Nanda
    Indonesia has 42,210 rivers whose utilization has not been optimized 12,894 MW of water energy potential in 89 power generatim locations, and there are about 2,275 villages out of 74,961 villages in Indonesia that do not have electricity. There are still many areas that do not have electricity. The presence of vortex turbines with small to large scale hydropower can be utilized in remote areas. So the vortex turbine is one of the turbines that meets these criteria, by utilizing the kinetic force of the water vortex to convert it into shaft power. Given this problem, this research is carried out with the aim of getting the better power from a vortex turbine with 5 variations of water discharge and efficiency in each variation. The method used is an experiment using a vortex type water turbine, by investigating the effect of variations in water discharge passing through the vortex turbine prototype. The results show that the highest maximum power is 2.2533 Watts, and the highest vortex turbine rotation is 192 rpm, The highest water discharge is 6.12 cm3/s, and the highest efficiency is 23.4%. Keyword: Vortex turbine, potential, microhydro
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    PENGARUH KONSENTRASI FORMALIN PADA TAHU TERHADAP RESPON TEGANGAN KELUARAN PADA SENSOR GAS SEMIKONDUKTOR BERBASIS ELECTRONIC NOSE
    (Elfitra, 2023-10) Falencia, Ega Hadisty; Setiadi, Rahmondia Nanda
    Formaldehyde is widely used as a food additive to preserve food, one of which is tofu, because tofu has a high-water content which makes tofu rot quickly and taste sour. The use of formaldehyde as a preservative is strictly prohibited in accordance with the Republic of Indonesia Minister of Health Regulation No. 033 of 2012 because formaldehyde is dangerous for body health. One innovative technology that can be used to detect the presence of formaldehyde in tofu in a simple and practical way is system design Electronic Nose (E-Nose). The objective of in this research is tofu soaked with varying formaldehyde concentrations of 0%, 1%, 2%, 3%, 4% and 5% will be detected using a system E-Nose which is designed to use 3 gas sensors made from semiconductors, including the TGS2600, TGS2602, and TGS2611 gas sensors. The gas sensors used will produce a response in the form of an output voltage. From the voltage response produced by each sensor, if the greater the formaldehyde concentration is detected, the resulting voltage response will also increase.
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    PEMBUATAN KARBON BERPORI BERBASIS DAUN SURIAN MERAH (TOONA SINENSIS) UNTUK KOMPONEN ELEKTRODA SEL SUPERKAPASITOR
    (Elfitra, 2023-10) Asmarwati, Asmarwati; Taer, Erman
    Porous carbon based on red surian (Toona sinensis) leaf biomass waste was chosen as the basic material for making active carbon. Porous carbon was synthesized using the chemical activator ZnCl2 as an activating agent, by varying the molarity at 0.3, 0.5 and 0.7 to obtain optimal conditions for activated carbon. Carbon electrode sample preparation starts from the drying stage, pre-carbonization at 250 °C, grinding with mortar and ball milling, sieving using a 60 μm sieve, chemical activation of ZnCl2, printing and integrated pyrolysis in one direct stage, namely carbonization and physical activation to an optimum temperature of 850 °C in a N2 and CO2 gas environment. Next, the effects of different concentrations of ZnCl2 activator were tested, investigated, and the physical properties were compared. The results of the characterization of the physical properties of the red surian leaf activated carbon electrode were obtained by calculating the percentage shrinkage of the density value. The difference in concentration of the ZnCl2 activating agent was able to reduce the percentage density of carbon coins by 20.43%, 28.28%, and 34.31% for SM-03, SM- 05, and SM-07. Based on these results, the effect of adding the chemical activator ZnCl2 to the carbon of red surian leaves can increase the evaporation of impurity elements other than carbon which is indicated by an increase in the shrinkage value.
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    ANALISIS POLA TEMPERATUR PEKANBARU DENGAN MENGGUNAKAN FRAKTAL DAN JARINGAN SARAF TIRUAN BERDASARKAN DATA TEMPERATUR BULANAN
    (Elfitra, 2023-07) Razzaq, Reynal Nur; Defrianto, Defrianto
    Climate and global warming play a crucial role in the lives of living organisms on Earth. Temperature, varying in each region, is a vital aspect in climate observation. This study analyzed temperature fluctuations in Pekanbaru from 2016 to 2022 using fractal analysis and Backpropagation artificial neural networks. The research findings revealed that temperature prediction with Backpropagation artificial neural networks was quite accurate. However, errors during testing or validation could impact the comparison with the target values. Fractal analysis indicated a persistence tendency in temperature fluctuations in Pekanbaru, with a Hurst exponent of 0.7993 and a fractal dimension of 1.2007. Nevertheless, temperature fluctuations were also influenced by other factors, leading to varying levels of stability over certain periods. Thus, temperature in Pekanbaru can be considered a complex system with diverse fluctuation patterns and varying levels of complexity.
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    RANCANG BANGUN SISTEM MONITORING LARUTAN GLUKOSA NON-INVASIVE MENGGUNAKAN METODE SPEKTROSKOPI INFRAMERAH
    (Elfitra, 2023-07) Arifin, Nur Aisyah; Setiadi, Rahmondia Nanda
    Infrared spectroscopy is widely used to measure a large amount of solid and liquid samples. Measurement of glucose concentration in solution is useful for examining how glucose concentration in water. It can be measured using infrared spectroscopy and it’s a potential application for non-invasive measurement of blood glucose levels. In this research AS7263 based sensor system was designed and applied as a detector of glucose levels in the human body. The purpose of this study was to determine the response of measuring glucose levels using infrared spectroscopy at various wavelengths and intensity, as well as to determine the effectiveness of measuring glucose level as a function of infrared light intensity. The results showed the sensitivity level of the AS7263 sensor varied with wavelengths and intensities. The results showed that the sensitivity level of the AS7263 sensor was varied with wavelength of 730 nm, 760 nm, 810 nm and 860 nm. Samples that were detected to have high glucose levels were found in samples of 10%, 15%, 20%, 25% and 30%. The higher the wavelength, the lower the intensity value for each solution concentration, and whereas the shorter the wavelength and intensity, the great the intensity value for each glucose solution. The in conclusion AS7263 sensor design can be used and functions well to detect glucose solution levels.
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    SELF-DOPING NITROGEN-OKSIGEN-FOSFOR TERHADAP KARBON NANOFIBER BERASAL DARI KULIT UDANG WINDU UNTUK MATERIAL SUPERKAPASITOR
    (Elfitra, 2023-07) Valensia, Indira
    Supercapacitors are renewable energy storage devices consisting of electrodes, electrolytes, current collectors and separators. Electrodes are the main contributors in supercapacitors because they are made of nano-scale materials that have high surface area and porosity. This study utilized tiger prawn skin waste without and with the addition of 0,3M, 0,4M, and 0,5M KOH with respective sample codes, namely KU, KU-03, KU-04, and KU-05. The manufacture of carbon electrodes was carried out by several processes, namely pre-carbonization process, chemical activation with KOH activator, carbonization process using N2 gas at 600ºC and physical activation using CO2 gas at 800ºC. The highest density shrinkage value is owned by the KU-04 sample, which is 37,60%. The carbon electrode from tiger prawn skin has a semicrystalline structure characterized by the presence of peaks (002) and (100) at angles of 24°-25° and 45° which contains functional groups OH, C-H, C≡C, C-N, C=O, P=O, C-O, and N-H. The nanofiber structure with the highest number is owned by the KU-04 sample with the percentage of elements of carbon, nitrogen, oxygen, and phosphorus each of 54.39%, 11,41%, 23,11%, and 2,54%. The isothermal adsorption-desorption of N2 from tiger prawn skin-based carbon electrodes with KOH activation exhibits combined behavior of type I and IV with the H4 hysteresis loop which shows the largest total specific surface area and total pore volume in KU-04 of 526.175 m²g-1 and 0.371887 cm3g-1, with a pore distribution of 2.8271 nm. Electrochemical analysis of supercapacitor cells using the Cylic Voltammetry and Galvanostatic Charge-Discharge methods with 1 M H2SO4 electrolyte produced the highest specific capacitance values in the KU-04 sample of 315 Fg-1 and 244 Fg-1, respectively. Based on the physical and electrochemical properties of supercapacitor cells derived from waste tiger prawn skin, increasing the amount of KOH to the carbon matrix can improve the performance of supercapacitor cell electrodes.
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    ANALISIS POTENSI LIMBAH DAUN SUNGKAI (Peronema canescens Jack) SEBAGAI SUMBER KARBON BERPORI UNTUK MATERIAL ELEKTRODA PADA PIRANTI SUPERKAPASITOR
    (Elfitra, 2023-07) Rusdi, Halhimni; Taer, Erman
    Sungkai leaves are known to contain natural compounds, and can also be used as a basis for making porous activated carbon sources for electrode materials in supercapacitors. This study aims to determine the effect of physical activation on the physical and electrochemical properties of supercapacitors. The porous carbon framework was obtained from Sungkai leaf biomass by optimizing the chemical activation reagent (ZnCl2). Sungkai leaves are biomass for supercapacitor cell electrode applications through the pre-carbonization stage at 100°C, 150°C, 200°C, 250°C for 30 minutes each. The next process is chemical activation using ZnCl2 activator with a concentration of 0.5M, then the carbonization process uses N2 gas at 600°C and physical activation uses CO2 gas with a temperature variation of 850°C. The physics-activated Sungkai leaf carbon electrode at 850°C had a mass shrinkage percentage from 0.632 to 0.234 g, a diameter shrinkage from 1.97 to 1.42 cm, a thickness shrinkage from 0.23 to 0.18 cm, and a density decrease from 0.882 to 0.658 g/cm3 with a shrinkage percentage of 25.39%.
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    PENGARUH VARIASI SUHU TERHADAP SINTESIS DAN KARAKTERISASI PARTIKEL MAGNETIK PASIR SUNGAI ROKAN DENGAN METODE KOPRESIPITASI
    (Elfitra, 2023-07) Jakoswa, Fajri Lucaz; Amiruddin, Erwin
    Investigation of natural sand originating from the Rokan river in Riau Province by turning it into magnetic iron oxide nanoparticles to determine changes in its particle structure has been carried out. Before the natural sand synthesis process is carried out, it is processed using an Iron Sand Separator (ISS) and a Neodymium Iron Boron (NdFeB) magnet to separate magnetic and non-magnetic particles, so the result is called an ISS product. The product is then synthesized using the coprecipitation method using HCl, NH4OH, and PEG-6000 as polymers with variations in temperature at the sonication stage, namely 50℃; 65℃; and 80℃ are characterized using X-Ray Diffraction (XRD). The XRD test results produced a magnetite (Fe3O4) phase with a cubic crystal structure. Crystal size is calculated using the Scherrer Equation where the average crystal size is 39.2 nm; 36.2nm; and 29.9 nm.
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    AKTIVITAS FOTOKATALIS SERBUK ZnO MENGGUNAKAN EKSTRAK DAUN KETAPANG SEBAGAI ABSORBAN METILEN BIRU
    (Elfitra, 2023-07) Silvia, Elsa; Hamzah, Yanuar
    Zinc Oxide (ZnO) nanoparticles are inorganic semiconductors that are generally powdered and non-toxic and have high electron mobility and thermal stability. This research aims to synthesize ZnO nanoparticles using Ketapang leaf extract for use in methylene blue photocatalysts. The method used in this study is Biosynthesis using Ketapang leaf extract. Ketapang leaf extract contains flavonoid compounds and tannins that function as corrosion inhibitors in metals. Ketapang leaf extract is made with a ratio of 1: 5, temperature 60°C and pH 12. The success of the reduction reaction is depicted from the UV-Vis spectrophotometer the emergence of absorption at a wavelength of 381.17 nm and an absorbance of 1.3879 a.u. ZnO nanoparticle powder successfully degraded methylene blue by 25 ppm with an efficiency of 59.8% at 1 hour and 72.4% at 2 hours.
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    ELEKTRODA KARBON DARI BIOMASSA CANGKANG ASAM JAWA (TAMARINDUS INDICA) DENGAN VARIASI AKTIVATOR KIMIA UNTUK SEL SUPERKAPASITOR
    (Elfitra, 2023-07) sari, Dinda permata
    Porous carbon electrodes based on biomass derivatives are very effective as base material for supercapacitor cell electrodes. This electrode has many advantages, such as its application which can take place in the long term, is sustainable, renewable, easy to obtain, and has economic value. In this study, using tamarind shell biomass with a variety of chemical activators namely KOH, NaOH, and ZnCl2. The process of synthesizing supercapacitor cell electrodes involves several steps, including pre-carbonization at 200°C, chemical activation, carbonization with N2 gas at 600°C, and physical activation with CO2 gas at 800°C. The results showed that the CAJ-K sample had the highest density shrinkage value, which was 50.94%. Fourier Transform Infra Red analysis shows the presence of O-H, C-H, C≡C, and C=C functional groups in tamarind shell activated carbon. X-Ray Diffraction analysis identified amorphous characteristics in the presence of two broad peaks at an angle of 2θ at angles 24⁰ and 44⁰ in the scattering plane (002) and (100). Scanning Electron Microscopy analysis shows the formation of nanofiber structures on porous carbon electrodes. Meanwhile, Energy Dispersive X-Ray analysis shows that the element carbon has the highest percentage of atoms. Electrochemical analysis of supercapacitor cells using the Cyclic Voltametry and Galvanostatic Charge-Discharge methods with 1 M H2SO4 electrolyte showed that the CAJ-K samples had the highest specific capacitance values, namely 211 Fg-1 and 159 Fg-1. Thus, it can be concluded that tamarind shell biomass has enormous potential as a porous carbon electrode for highperformance supercapacitor cell applications.
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    RANCANG BANGUN ALAT TEKNOLOGI PENGERING PAKAIAN DENGAN MEMANFAATKAN LIMBAH BIOMASSA ARANG TEMPURUNG KELAPA BERBASIS ARDUINO UNO
    (Elfitra, 2023-07) Saputra, Dhery; Krisman, Krisman; Muhammad, Juandi
    Research has been carried out on "Design of a Clothes Dryer Technology Tool by Utilizing Waste Coconut Shell Charcoal Based on Arduino UNO" using an experimental method. This Arduino UNO-based clothes dryer technology uses biomass energy from coconut shell charcoal which is used as an energy source by using the mass of biomass used, namely 1400 grams for thin clothes and 4000 grams for thick clothes. Measurement of temperature in the drying chamber using the DHT22 sensor with an observer time interval of 10 minutes. The results of the research data obtained using a mass of 1400 grams of coconut shell charcoal for this type of thin clothing reached the highest source temperature and temperature in the drying chamber respectively 71.00 °C and 69.00 °C, while for a mass of 4000 grams of shell charcoal coconut with thick clothes, namely 106 °C and 93.40 °C. This happens because the energy produced by the biomass works to transfer heat from the source to the drying chamber, so that the temperature value of the source of the biomass combustion chamber is higher than the temperature in the drying chamber and the temperature resistance of the drying chamber lasts for 200 minutes.
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    ANALISA LOOP HYSTERESIS DAN MORFOLOGI NANOPARTIKEL OKSIDA BESI PASIR ALAM LOGAS DIDOPING COBALT DAN APLIKASINYA UNTUK DEGRADASI METILEN BIRU
    (Elfitra, 2023-07) Milini, Amo; Amiruddin, Erwin
    Methylene blue, a synthetic dye is widely used in the textile industry. Methylene blue has a negative impact on the environment, for example contaminated water, so it is necessary to overcome this problem, using degradation method. This research has been carried out on the application of iron oxide nanoparticles for the degradation of methylene blue. Iron oxide nanoparticles are obtained from Logas natural sand Kuantan Singingi Regency, Riau Province through a Ball Milling process. Determination of the magnetic and morphological properties of the sample is determined using a Vibrating Sample Magnetometer (VSM) and Scanning Electron Microscope (SEM). The results of research using VSM showed that the values of saturation magnetization (Ms), remanent magnetization (Mr) and coercivity (Hc) increased with the addition of Cobalt concentration. The saturation Magnetization value (Ms) is 7.98 emu/g; 17.42 emu/g; and 19.01 emu/g, Remanent magnetization (Mr) 0.65 emu/g; 1.52 emu/g; and 1.64 emu/g, Coercivity (Hc) 124.21 Oe; 255.5 Oe; and 269.29 Oe. The results of SEM data of iron oxide nanoparticles magnification of 10,000 times showed a decrease in the average particle size as the concentration of Cobalt doping increased, namely 0.812 μm; 0.637μm; and 0.631 μm. The ability of Iron Oxide nanoparticles as a catalyst in UV-Vis spectroscopy and showed a poor ability to degrade methylene blue in aqueous solution when Iron Oxide nanoparticles are doped with Cobalt. The best efficiency is when hematite is doped with Cobalt 0 wt.%, 5 wt.% and 10 wt.% in the first 20 minutes are 81.62%, 70.909% and 82.856% respectively.
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    ELEKTRODA KARBON AKTIF BERBAHAN DASAR BIOMASSA DAUN PANDAN DURI DENGAN PENAMBAHAN KARBON NANOTUBE UNTUK ELEKTRODA SUPERKAPASITOR
    (Elfitra, 2023-06) suganda, Regi
    Supercapacitors are renewable energy storage devices consisting of electrodes, electrolytes, current collectors and separators. Electrodes are one of the most important components in a supercapacitorbecause they are made of nanoscale materials that have a high surface area and porosity. This study used the leaves of the pandanus tectorius fiber with the addition of 10% and 15% carbon nanotubes with respective sample codes, namely DPD-0, DPD-10, and DPD-15. The manufacture of carbon electrodes was carried out by several processes, namely pra-carbonization process, chemical activation with KOH activator and addition of carbon nanotube, carbonization process using N2 gas at 600°C and physical activation using CO2 gas at 800°C. The highest density shrinkage value is owned by the DPD-15 sample, which is 56,28%. The DPD carbon electrode contains functional groups O-H, C-H, C≡C, C=C, C-O amd has a semicrystalline structure characterized by the presence of peaks (002) and (100) at angles of 24°-25° and 44°-45°. The nanofiber structure DPD-15 more than DPD-0 with a carbon element 78,32% and oksigen element 16,25%. Electrochemical analysis of supercapacitor cells using the Cycliv voltammetry and Galvanostatic Charge-Dischage methods with 1 M H2SO4 electrolyte resulted in the highest specific capacitance values belonging to the DPD-15 sample of 369,77 F/g and 321,33 F/g. Based on the physical and electrochemical properties of DPD biomass-based supercapacitor cell, the addition of carbon nanotube to the carbon matrix might improve the performance of supercapacitor cell electrodes.
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    INTERPRETASI KUALITAS AIR BAWAH TANAH DI SEKITAR AKTIVITAS USAHA LAUNDRY KELURAHAN TUAH KARYA DENGAN MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DAN GEOKIMIA
    (Elfitra, 2023-06) Aulia, Raudatul; Juandi, Juandi
    The laundry business on Taman Karya Street produces the disposal of waste containing chemicals surrounding the ground water in that place. This research aims to determine the depth of groundwater, investigating the water quality for consumption using the Schlumberger configuration geoelectric method on two tracks with a length of 100 m. The data obtained in the acquisition process is used to calculate the apparent resistivity value at each measurement point and analyzed quantitatively and qualitatively. The process is continued with inversion using the Software Progress v3.0 application so that the resistivity and layer thickness values can be obtained. The result show that the first track obtains a range of resistivity values ranging from 198.58 Ωm to 252.61 Ωm, and the second track is 9.90 Ωm to 1209.97 Ωm. There are five sample points from each of the laundry wells and residents' wells. The underground water sample is tested such as pH, TDS, conductivity, salinity, and turbidity. The results show that the underground water around the research area cannot be consumed by the people who live in that area, based on the Regulation of the Minister of Health of the Republic of Indonesia. The data describe that underground water samples exceed the standard quality in which the pH is 6.5 or acidic. However the TDS and turbidity parameters still fulfill with the quality standard.
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    ANALISIS SEBARAN AIR BAWAH TANAH SECARA HORIZONTAL MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI WENNER DI KELURAHAN SIMPANG BARU
    (Elfitra, 2023-06) Manurung, Nova Yuliana Br; Juandi, Juandi
    subsurface lithology, especially rocks containing groundwater using the geoelectric method have been investigated. The geoelectric method is a geophysical method used to determine the geological conditions of the subsurface of the earth based on variations in the resistivity values of the rock types. The method used in this study is the Wenner configuration geoelectric method. This method has several advantages, such as good vertical resolution and high sensitivity to lateral changes. Apart from knowing about the distribution and depth of subsurface water, and subsurface conditions, data from research results in the Simpang Baru Village area can be used regarding the need for clean water for the community. Data obtained from measurements using the Wenner configuration geoelectrical method are processed to obtain resistivity, while for interpretation uses the software Res2Dinv. On a track with a length of 100 meters, it has a depth of up to 9.56 meters below the surface with a resistivity value with a lowest one of 0.370 Ωm and the highest one is 33141 Ωm. The points of water distribution at depths of 2.25 – 5.56 m have resistivity values of 0.37 – 1.89 Ωm corresponding to the horizontal line at points 30 – 84 m.