Garuda - Garba Rujukan Digital

Pengaruh suhu proses dan lama pengendapan terhadap kualitas biodiesel dari minyak jelantah (The influence of process temperature and deposition time on biodiesel quality of cooking oil) Silvira Wahyuni; - Ramli; - Mahrizal
PILLAR OF PHYSICS Vol 6 (2015)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Biodiesel is a type of fuel alternative diesel derived from biological materials that are processed vegetable oil transesterification using methanol and catalyst NaOH. One of the vegetable oil is used cooking oil. Used cooking oil is one of the raw materials that have a high chance for the manufacture of biodiesel because it still contains triglycerides in addition to free fatty acids. Biodiesel is made by giving some physical treatment, such as temperature and duration of settling time. To investigate the influence of temperature processes and duration settling time conducted this research with a variety of 40°C, 50°C, 60°C, 70°C, and 80°C and duration settling time , for 48 hours, 96 hours, 144 hours, 192 hours and 240 hours as independent variables, Controlled variable is the time stirring for 5 minutes, stirring speed of 1050 rpm, the catalyst base (NaOH), a methoxide liquid is 20%. Dependent Variable is biodiesel quality which covers viscosity, density, yield, and Flash Point. It was found if the temperature is greater, the viscosity and density decreases. While the highest yield is 76% produced by variations in temperature of 50°C, the average Flash point >110°C, the results of biodiesel according to the SNI Standards. For a settling time variety is not a significant influence in the making of biodiesel with the average for all variations in viscosity between 5.7-5.8 CSt, density of about 861 kg/m3, flash point >110°C and average yield is 75.8%

Analisa ukuran bulir mineral magnetik pada lindi tpa sampah kota padang menggunakan metoda Anhysteretic Remanent Magnetization (ARM) (Analysis of magnetic mineral grain size on leachate of Padang city waste landfill using the Anhysteretic Remanent Magnetization (ARM) method) Risaldi Putra; - Mahrizal; Fatni Mufit
PILLAR OF PHYSICS Vol 6 (2015)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Padang city has landfill located in Air Dingin Village Balai Gadang Koto Tangah Subdistrict of Padang. This landfill has some leachates that assumed there is seepage from leachate pond to the river and drain. The results observation present that the river is decomposed and its color is changed so it obliged to research about Pollutants of Landfill (TPA) Padang City Mineral Magnetic Basis. The purpose of the research is to determinate grain size and mineral magnetic domain in Leachates of Landfill (TPA) Padang City by using ARM (Anhysteretic Remanent Magnetization) Method. The samples research were 6 samples that taken from leachate pond, the river, and drain at landfill (TPA) area. Measuring instruments that utilized were Ekman Grab, Susceptibility Meter, Molsfin AF demagnetizer, PARM ( Partial Anhysteretic Remanent Magnetization) and Minispin Magnetometer. The data collection was analyzed by plotting the correlation between relative intensity (I/Io) and magnetic field by using Lowrie and Fuller Kurve Test as comparative kurve for measuring grain size and magnetic domain. The research results showed that grain size of leachate pond sample is about 6 μm up to 135 μm, whereas grain size of river and drain samples are about 110 μm up to 135 μm. Magnetic domain sample was obtained of the research result is pseudo single domain (PSD) and multi domain (MD). Grain size was obtained from river and drain sample bigger than grain size of leachate pond sample. Mineral magnetic of leachate pond is more disposed to PSD whereas mineral magnetic of river and drain is more disposed to MD. Based on the results, the river and drain samples are expected that it has contaminated mineral magnetic of leachate pond (anthropogenic)

Analisis jenis mineral magnetik dari polutan kendaraan bermotor menggunakan metode Isothermal Remanent Magnetization (IRM) di Kota Padang (Analysis of magnetic mineral types from motorized vehicle pollutants using the Isothermal Remanent Magnetization (IRM) method in Padang City) Pramita Syafrina; - Mahrizal; Harman Amir
PILLAR OF PHYSICS Vol 1 (2013)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Polution is big problem in many city. Iron-oksida is very small and dangeraous for healty, so important to measure who give information about magnetic field. The source of polution are mount eruption, forest fire and motor vehicle. In this eksperiment we studying about kind polution from motor vehicle. The kind polutan of vehicles was know with Isothermal Remanent Magnetization (IRM) method. In this eksperiment 93 sample, 45 top soil sample, 40 wood sample and 8 for leaf sample. The result of data analysis indication that intensity magnetization of top soil is 10.24 to 11.974.558 mA/m for wood sample is 0,22 to 7.186,20 mA/m and for leaf 0.33 to 900.31 mA/m. The analysis for saturation kurva of IRM for samples is magnetite (Fe3O4) because out field ≤ 300 mT. Keywords: Isothermal Remanent Magnetization (IRM), magnetite

Analisis komposisi unsur Fe terhadap nilai suseptibilitas magnetik di Kota Padang menggunakan metode X-Ray Fluorescence (XRF) (Analysis of the elemental composition of the magnetic susceptibility value in Padang City using the X-Ray Fluorescence (XRF) method) Elsa Feryani Harifan; - Mahrizal; Fatni Mufit
PILLAR OF PHYSICS Vol 5 (2015)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Many industrial processes such as steel and cement production produces shaped particles of dust and fly ash. The particles containing pollutants shaped magnetic minerals belonging to the type of iron sulfide minerals iron and titanium sulfide. These pollutants come from the burning of coal. Basically, before burning coal is not magnetic. In the combustion process produces pyrite which decompose and form pyrrhotite and sulfur gases. At temperatures above about 1350 K, pyrrhotite decomposes into iron and sulfur. Iron (Fe) is the most dangerous heavy metals contained in the topsoil. In this study measured the magnetic susceptibility values and elemental composition to analyze the elemental composition Fe of the magnetic susceptibility values,The sample in this study is the topsoil. Measurements of magnetic susceptibility values topsoil samples performed using magnetic susceptibility meter. Then the measurement of the elemental composition of ten samples using X-Ray Fluorescence (XRF) spectrometer. Measurement data plotted in the form of a graph to show the relationship of the value of the elemental composition of Fe magnetic suseptbilitas. Meanwhile, the results of magnetic susceptibility meter, magnetic susceptibility values can inform the type of magnetic minerals based on magnetic susceptibility values.The results of this study indicate that the intensity of the magnetic susceptibility is not only influenced by the composition of the elements Fe, but also influenced by other elements contained in topsoil samples, such as Al, Si, Ca, and Ti. Weight percentage of Fe and Ti derived from the main constituent mineral iron is ilmenite, are paramagn

Identifikasi komposisi unsur logam berat pada lindi tempat pemrosesan akhir (TPA) sampah Kota Padang menggunakan X – Ray Fluorescence (XRF) (Identification of the composition of heavy metal elements in the leachate of Padang City waste final processing site using X-Ray Fluorescence (XRF) Iswandi Iswandi; - Mahrizal; Fatni Mufit
PILLAR OF PHYSICS Vol 5 (2015)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Final waste processing site of Padang City is located on Air dingin, Kelurahan Balai Gadang, Koto Tangah Sub – distrik has 8 leachate holding pond. At 8 leachate holding pond flowe in to river next to final processing site. Most of residents around the final processing site use water fromriver and well around waste processing site as a source of clean water for daily life. This research aims to know composition ofheavy metal in sedimen of leachate pond, river sediment and gutter sediment of final waste processing site Air Dingin, Padang City. The sample used in this research are 4 samples of leachate pond sediment, 1 sample of gutter, 1 sample of riversediment which have been measured magnetic susceptibility values. The measurement result XRF will show content of elements contained in the samples. Determining the content of heavy metal using determined by matched measurement result with periodic table. The measurement result using XRF further made in to table and graph. The measurement result using XRF show that heavy metal contained insample of leachate pond sediment are Titanium (Ti), Vanadium ( V), Cromium ( Cr ), Manganese ( Mn ), Iron ( Fe ), Cobalt ( Co ), Zinc ( Zn ), Rhadium ( Rh ), Neodinium ( Nd ), Eopium ( Eu ), Iterbium ( Yb ), Indium ( In ) and Zirconium (Zr). At measurement composition of sediment sample is acquired that heavy metal similar to result of leachate sample measurement, only Iterbium (Yb), Indium (In) not foynd, where as on sediment sample of gutter also there is heavy metal that similar to composition sample of leachate and only Indium (In) not found. The heavy metal that dominant find on sample as leachate sediment, river sediment, and gutter sediment is iron with percentage 33.664 % and rhadium with percentage 30.587 %. Heavy metal at final waste processing site Air Dingin suppose get in through metallic waste, chemical waste such as vehicles waste, waste of iron and steel, battery alectric devices, insecticide residuethat not classified weel. When wastes polish by water which get in to final waste processing site, water result of waste degradation sediment at mound of waste and flow to leachate holding wast

Penentuan tingkat polusi udara akibat kendaraan bermotor menggunakan metoda suseptibilitas magnetik di Kota Padang (Determination of the level of air pollution due to motorized vehicles using the magnetic susceptibility method in Padang City) Wedara Yuliatri; - Mahrizal; Fatni Mufit
PILLAR OF PHYSICS Vol 1 (2013)
Publisher : Department of Physics – Universitas Negeri Padang UNP

ABSTRACT Air pollution in big cities has worried. Air pollution caused by human activities such as industry, motor vehicles, burning of trash, and other activities. Air pollution caused by magnetic minerals is derived from engine frictions, corrosion of motor vehicle, and gas waste products of incomplete combustion. They fly with air and cause air pollution. Therefore research about determining pollution level from motor vehicles in Padang town was necessary. The purpose of this research was to determine the level of air pollution from vehicles motor. This research used 170 sample that consist of 99 topsoil samples, 31 leaf samples, and 40 bark samples. This research used Magnetic Susceptibility method. Magnetic Susceptibility method is used to determine the Magnetic Susceptibility value of sample. It is known by used Bartington Susceptbility Meter MS2B type. Measurement is done based on massa susceptibility value. After the Magnetic Susceptibility value is known, pollution level can be determined (low, medium or high). The result of measurement show average the Magnetic Susceptibility value in all street is 1023,2 × 10-8 – 1284,6 × 10-8 m3kg-1. It is included to high pollution category. The highest Magnetic Susceptibility value is at By Pass Lubuk Begalung street with high pollution level. The highest Magnetic Susceptibility value is at distance of 0 m from the roadside, thus 1 m from the roadside and 2 m from the roadside. Keywords: magnetic minerals, Air pollution, Magnetic susceptibility

Investigasi aquifer dengan metode inversi smoothness-constraint least squares data geolistrik tahanan jenis konfigurasi schlumberger di Bukit Apit Puhun Kecamatan Guguk Panjang Kota Bukittinggi (Aquifer investigation using smoothness-constraint least squares inversion method of geoelectric resistivity schlumberger configuration in Bukit Apit Puhun, Guguk Panjang District, Bukittinggi City) Imran Razat; - Akmam; - Mahrizal
PILLAR OF PHYSICS Vol 6 (2015)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Bukit Apit Puhun was one of the area that need to know information about the depth of the aquifer layer. Bukit Apit Puhun located at Sianok canyon a valley surrounded by hills composed by a layer of igneous rocks. Layers of rock in the Sianok canyon assumed can store groundwater reserves. This research used the resistivity geoelectrical methode with Schlumberger configuration. The data were processed and interpreted by the Smoothness Constraint Least-Squares inversion. The data were taken five track using ARES (Automatic Resistivitymeter). The result of this research showed that the material contained in the Bukit Apit Puhun was Clay, Sandstone, Limestone and Andesite. The material contained in the study area shows that the area was a water catchment area with no finding of aquifer layers in every track. Results of this study were not strengthened by the discovery of a well to track the location of measurement

Identifikasi jenis batuan menggunakan inversi marquardt data geolistrik tahanan jenis konfigurasi dipole-dipole Bukit Lantiak Kecamatan Padang Selatan (Identify rock types using inversion marquardt geoelectrical data resistivity dipole-dipole configuration in Bukit Lantiak, Padang Selatan District) Jemmy Rohmana; - Akmam; - Mahrizal
PILLAR OF PHYSICS Vol 6 (2015)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The purpose of this research was to describe the type and the depth of rocks in Bukit Lantiak Padang Selatan. The type and the depth of rocks was needed to minimize the hazard caused landslide in the research area. This research use geophysical exploration method. Equipment that use was Automatic Resistivity (ARES) with Dipole-dipole configuration. The interpretation of the data in this research uses Marquardt inversion method to process the measurement data. Data was interpreted to get resistivity value and depth of rock in 2D model cross section below the earth surface. Result of this research indicates the type of rocks in Bukit Lantiak Padang Selatan is Andesite, Sandstone, Limestone, and Clay. These results indicate that the slopes of Bukit Lantiak composed by a mixture of hard rock layers that Andesite with soft rock layers that Clay and Sandstone. It show that Bukit Lantiak area have rock layers that are susceptible to landslides

Penerapan metode Isothermal Remanent Magnetization (IRM) untuk menentukan jenis mineral magnetik pada lindi di tempat pembuangan akhir (TPA) Air Dingin Kota Padang (Application of the Isothermal Remanent Magnetization (IRM) method to determine the type of magnetic minerals in leachate at the Air Dingin Landfill Padang City) Mulyandri Putra; - Mahrizal; Fatni Mufit
PILLAR OF PHYSICS Vol 6 (2015)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Padang city waste removed and processed in Air Dingin Landfill, Balai Gadang Village, Kecamatan Koto Tangah. On the location of the Landfill there were rivers used by residents for daily needs. Leachate generated from Landfill cast into the river can contaminate the River, which that cause the river’s water black and smelling. This research aims to determine the type of magnetic minerals in Leachate in the Air Dingin Landfill city of Padang, as an indicator of water pollution by leachate. This research uses the 6 samples taken from samples of the sediment pond, sediment River and sediment sewers on Air Dingin Landfill. Instruments used for sampling is Ekmam Grab. Types of magnetic mineral samples are specified by giving a magnetic field toward the sample using the method of Isothermal Remanent Magnetization (IRM) with instruments Electromagnetic Weiss. Data analysis was done with a given magnetic field of plotting for the intensity of magnetization of the sample which has reached saturation and compared to a standard curve of the IRM for viewing different types of magnetic mineral magnetite or hematite. The value of the magnetic field of the sample measured experiencing saturation at the time value is smaller than 300 mT. Saturation curve based on IRM mineral types in a sample of leachate, rivers and sewers Air Dingin Landfill city of Padang in the majority is the mineral magnetite (Fe3O4)

Identifikasi prekursor tanah longsor berdasarkan perubahan nilai tahanan jenis batuan menggunakan metode geolistrik time-lapse konfigurasi dipole-dipole di Bukik Lantiak Kecamatan Padang Selatan (Identification of landslide precursors based on changes in the value of rock resistivity using the geoelectric time-lapse method of dipole-dipole configuration in Bukik Lantiak, Padang Selatan District ) Rifa Kurnia; - Akmam; - Mahrizal
PILLAR OF PHYSICS Vol 11, No 1 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Landslides are a serious hazard for mankind causing fatality and material loss. Losses generated from landslide events can be minimized by investigating early symptoms or precursors of a landslide event. The research is conducted in Bukik Lantiak, South Padang sub-district by using Geolistrik method of time-lapse Dipole-dipole configuration as effort of early symptoms detection or precursor that can cause the occurrence of landslide disaster. The results shows that there is a change of rock resistivity value in each measurement path. The percentage change of resistivity are -12.25% of path 1, -8.73% of path 2, 3.07% of path 3, and -37.42% of path 4. The landslide precursor can be known from change of resistivity value, when measurements are made on each path at two different times so that the measured resistivity will be different. This difference is caused by the absorption of rainwater by the surface which then migrates into the inner layer

Title

Found 12 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 12 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 12 Documents
Search