Browsing by Author "Salomo, Salomo"

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    ANALISA KOMPOSISI DAN UKURAN PARTIKEL OKSIDA BESI DI PREPARASI BALL MILLING DUA TAHAP
    (Elfitra, 2023-05) Wijaya, Harits Ari; Salomo, Salomo
    The value of magnetic susceptibility and variation of composition and size of iron oxide particles from natural sand collected from Rokan River Riau Province have been investigated by ball milling.The results show that the value of magnetic susceptibility increase with increasing ball milling rotation time, namely from 11349.9 in BM 1, to 12385.6 in BM 2A, 13369.5 in BM 2B; and 14526,2 on BM 2C respectively. Likewise with the test results using X-Ray Fluorescence which showed that the magnetic element, namely Fe, experienced an increase in the proportion from 48.141% for BM 1 to 50.358% for BM 2A, 51.586% for BM 2B and 52.239% for BM 2C respectively. The test results using a Scanning Electron Microscope show that the average sample particle size decrease from 120,14 nm to 113,66 nm; 105,02 nm; and 95,68 nm as the milling time increases
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    Analisa Pengaruh Doping Mangan Terhadap Suseptibilitas Magnetik dan Sifat Kristalinitas Pasir Alam Sungai Rokan Sebagai Fungsi Kecepatan Putaran Tabung
    (Elfitra, 2022-07) Widia, Selvyandra Ananda; Salomo, Salomo
    The rotation speed of the tube in the ball milling method affects the crystalline size and magnetic properties of the natural sand sample used. Identification of elemental content in natural sand was carried out using X-Ray Fluorescence (XRF) for ball milling product with tube rotational speed functions of 100 rpm, 150 rpm and 200 rpm.The ball milling product is then separated using Neodymium Iron Boron (NdFeB).The result of this study XRF identification results showed that the Fe composition increased from 16,007% to 16,439%. while the composition of K, Ti, V, Cr, Mn, Fe, and Ni increased,the composition of Si, Al, P and Cu decreased. The results of XRD identification produced hematite (Fe2o3) phase magnetic nanoparticles with a rhombohedral crystal system. The average size of the crystals increased at a speed of 150 rpm was 28,8292 nm.
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    ANALISA SIFAT MAGNETIK DAN KOMPOSISI PARTIKEL PASIR ALAM SUNGAI ROKAN PROVINSI RIAU SEBAGAI FUNGSI WAKTU OPTIMUM BALL MILLING
    (perpustakaan UR, 2021-07) Yani, Eet Novita; Salomo, Salomo
    The ball milling time affects the magnetic properties its product. Research on the magnetic properties and the product composition of natural sand of the Rokan River as a function of optimum time in ball milling has been done . The natural sand samples of Rokan River that has collected with a mass of 10 Kg were dried under the sun ray before the separation process between magnetic and non-magnetic particles using an Iron Sand Separator (ISS). The result of the separation with the Iron Sand Separator is called product of ISS. The product of ISS was milled as a function of time of 60 hours, 70 hours, 80 hours, 90 hours, 95 hours, 100 hours, 105 hours and 110 hours with 16 pieces of iron balls that has 1.5 cm in diameter. The product of the ball milling then separated using Neodymium Iron Boron (NdFeB), the result of this separation is called ball milling product (BM product). The results of this research indicate that the magnetic induction values of natural samples of Rokan river, ISS product and BM product in the ranged from 12,338-14,850 mT for the same current of 1000 mA, while the magnetic susceptibility values obtained in the range 3393,950-24444.817 × 10-5. The identification of element content in natural sand was done using X-Ray Fluorescence (XRF) for ball milling product (BM product) as a function of time of 95 hours, 100 hours, 105 hours, and 110 hours. The results of XRF identification showed that the composition of Fe increased from 30.043% to 51.201%, while the composition of Si decreased from 36.715% to 21.215%. The results of research showed that the optimum time for the ball milling method was 100 hours.
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    ANALISA SIFAT MAGNETIK DAN UKURAN PARTIKEL PASIR ALAM SUNGAI ROKAN DISINTESIS DENGAN BALL MILLING
    (2021-02) Rahmadani, Fitri; Salomo, Salomo
    This research is about the magnetic properties and particle size of natural sand in the Rokan River, Riau Province. The natural sand samples were dried under the sun and separated from the rocks that followed the sand subsequently. Sand was separated among magnetic particles and non-magnetic particles by using an Iron Sand Separator (ISS). Coreless and core magnetic induction were measured using the Pasco PS-2162 Probe. Solenoid was made of 2500 coils with a 10 length and a 3 cm diameter. Coreless magnetic induction was measured as a function of currents 2, 4, 6, 8 and 10 A with a 1 mm constant distance. The separated samples were decayed by using ball milling for 30, 60, 80 and 100 hours subsequently, then separated again using Neodymium Iron Boron (NdFeB) and the magnetic induction value was measured using Vibrating Sample Magnetometer (VSM) and measured particles using a Scanning Electron Microscope (SEM). The results showed that the remanent magnetization value of the natural sand of the Rokan River which had been crushed by ball milling for 30 hours and 100 hours were 1,15 emu/g and 0,5 emu/g by the coercivity of 117,52 Oe and 227,34 Oe, and saturation magnetization of 1,3 emu/g and 0,6 emu/g. The results of the research for the natural sand particles of Rokan River that had been crushed for 30 hours and 100 hours were 231 nm and 96 nm.
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    ANALISA SUSEPTIBILITAS MAGNETIK KOMPOSISI DAN UKURAN PARTIKEL PASIR ALAM SUNGAI ROKAN DIPREPARASI DENGAN METODE BALL MILLING DUA TAHAP
    (Elfitra, 2022-01) Yakub, Riky; Salomo, Salomo
    Analysis of the magnetic susceptibility of the composition and particle size of the natural sand of the Rokan River has been carried out using two-stage ball millng method.This study aims to determine the value of magnetic susceptibility,percentage composition and particle size of natural sand in the Rokan River which has been ball milled in two stages. The results of the calculation of the magnetic susceptibility value using the two-stage ball milling method have increased for the same current of 1000 mA, the magnetic susceptibility value for ball milling stage 1 (𝐵𝐵𝑚1) is 32037.118 × 10−5and stage 2 ball milling (𝐵𝐵𝑚2) is 36084,843 × 10−5. Identification of the composition was carried out using X-Ray Fluorescence (XRF) and particle size testing using a Scanning Electron Microscope (SEM) for ball milling product stage 1 (𝐵𝐵𝑚2) and stage 2 (𝐵𝐵𝑚2) ball milling. The results of XRF identification showed that the Fe composition increased from 18.510% to 20.039%, while the Si composition decreased from 51.329% to 50.093%. The results of the SEM test showed that with the two-stage ball milling method the particle size decreased from 1.564 𝜇m in stage 1 ball milling and 1.353 𝜇m in stage 2 ball milling.
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    IDENTIFIKASI FASE MAGNETIK DAN KOMPOSISI ELEMEN PARTIKEL PASIR SUNGAI ROKAN SEBAGI FUNGSI WAKTU BALL MILLING
    (2021-03) Mikhael, Doni; Salomo, Salomo
    Identification of magnetic particles and the elemental composition of the natural sands of the Rokan River, Riau Province has been done. The natural sand samples that have been dried under the sun were separated between magnetic and non-magnetic particles using Iron Sand Separator (ISS). This result was called the product of ISS. The product of the ISS was milled using ball milling with iron balls having diameter of 1.5 cm for 30 hours and 100 hours. The results of this process were separated using Neodynium Iron Boron (NdFeB) magnets and this result is called ball milling product. The magnetic susceptibility was calculated based on the values of magnetic induction (Bo) of a solenoid of 2500 turns, 10 cm long and 3 cm in dimater and total magnetic induction of the solenoid (BT). The magnetic induction the solenoid was measured using Pasco Magnetic Probe PS….. ?? . The results show that the magnetic susceptibility increases from 1140.59 × 10-5 to 15495.71 × 10-5 for natural sand and ball milling product for 100 hours, respectively. The X-Ray Fluorescence (XRF) test shows that the composition of the magnetic element Fe increases from 1.67% to 35.39% for natural sand and bal milling product of 100 hour, respectively. . The X-Ray Diffraction (XRD) test shows that the magnetic phase of 100 hours ball milling product has a hematite phase (α-Fe2O3) with some impurities such as silicon (Si) and Titanium (Ti)
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    PEMETAAN NILAI SUSEPTIBILITAS MAGNETIK TANAH DI SEKITAR KAMPUS UNIVERSITAS RIAU PEKANBARU
    (wahyu sari yeni, 2018-10-29) Ayuni, Sonia; Salomo, Salomo
    The mapping of magnetic suseptibility values of soil around Riau University has been done. The amount of soil taken from area around the University about 250 mg for each location. The number of sample locations are 37 points obtained from some Faculty at Riau University. The method used for sample collection was “ zig-zag”method. The 37 point locations of samples selected based on the grid method. The total magnetic induction of solenoid was measured using magnetic Pasco Probe Ps-2162, The magnetic particles and non magnetic particles were separated using Neodibilium Iron Boron Magnet (NeFeB). The results showed that the magnetic degree of samples varied in the range of 0.04% - 4.36%. The mass suseptibility values of the samples also varied from 61,94 x 10 -8 m3/Kg - 2039,88 x 10 -8 m3/Kg. Mapping the magnetic suseptibility values of soil around Riau University was done of software using the “ surfer 11” . The highest values of mass suseptibility are obtained from Enginering Faculty and the lowest values of mass suseptibility are located from Economics Faculty.
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    PEMETAAN NILAI SUSEPTIBILITAS MAGNETIK TANAH DI SEKITAR KAMPUS UNIVERSITAS RIAU PEKANBARU
    (2018-03-07) Ayuni, Sonia; Salomo, Salomo
    The mapping of magnetic suseptibility values of soil around Riau University has been done. The amount of soil taken from area around the University about 250 mg for each location. The number of sample locations are 37 points obtained from some Faculty at Riau University. The method used for sample collection was “ zig-zag”method. The 37 point locations of samples selected based on the grid method. The total magnetic induction of solenoid was measured using magnetic Pasco Probe Ps-2162, The magnetic particles and non magnetic particles were separated using Neodibilium Iron Boron Magnet (NeFeB). The results showed that the magnetic degree of samples varied in the range of 0.04% - 4.36%. The mass suseptibility values of the samples also varied from 61,94 x 10 -8 m3/Kg - 2039,88 x 10 -8 m3/Kg. Mapping the magnetic suseptibility values of soil around Riau University was done of software using the “ surfer 11” . The highest values of mass suseptibility are obtained from Enginering Faculty and the lowest values of mass suseptibility are located from Economics Faculty.
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    PENENTUAN KANDUNGAN LOGAM DAN SUSEPTIBILITAS MAGNETIK AIR GAMBUT DI KELURAHAN LABUH BARU BARAT KECAMATAN PAYUNG SEKAKI
    (Elfitra, 2022-01) Ibrahim, Naufal; Salomo, Salomo
    Water is a very important substance for human life therefore, more water is needed. Peat water is surface water resulting from the accumulation of plant material residues in a large volume with a pH ranging from 3-5. In general, this makes peat water does not meet the requirements for clean water quality, however, in the case of water shortages it forces peat water to be processed into clean water. Peat water treatment must begin with measuring what content is in the water. Peat water was obtained from a large area of peatland in the Labuh Barat sub-district, Payung Sekaki subdistrict. The peat water was collected from 36 points from a depth of up to 2 meters. Peat water content was determined by measuring the susceptibility value using Quincke method and AAS test to classify mineral types and identify the process of mineral transfer in peat water then susceptibility mapping was carried out using the surfer application which is non-destructive method. The results of the magnetic susceptibility values of peat water samples in the Labuh Baru Barat sub-district, Payung Sekaki sub-district are 1.8465 x 10-5 to 1.962 x 10-5, with a density of 992,000 Kg/m3 to 998,000 Kg/m3. Based on the results of the magnetic susceptibility and the AAS test, it was found that the sample was paramagnetic with the heavy metal content of Mn, Mg and Cr still categorized as safe and not exceeding the standard threshold.
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    PENGARUH BALL MILLING DUA TAHAP TERHADAP SUSEPTIBILITAS MAGNETIK DAN KOMPOSISI PARTIKEL PASIR ALAM SUNGAI ROKAN
    (perpustakaan UR, 2021-07) Ayuni, Widya; Salomo, Salomo
    The effect of two-stage ball milling on the magnetic susceptibility and particle composition of the natural sands of Rokan River has been carried out. The sample was processed using Iron Sand Separator (ISS). The product of ISS was milled using ball milling for 80 hours using two stage ball milling with time variations for 20 hours, 30 hours and 40 hours with milling ball diameter of 1.5 cm. To separate magnetic and non-magnetic particles, then NdFeB magnets were used. Magnetic induction of the samples was measured from a 2500 coil solenoid with Pasco magnetic probe PS-2162 probe connected to the Data Studio software. The product of two stage ball milling is called BM product (BM product). Identification of elemental content in natural sand was carried out using X-Ray Fluorescence (XRF). The results showed that the magnetic susceptibility value increases with increasing of the ball milling time. The highest magnetic susceptibility value of the samples was found with a milling time of 40 hours (BM2c) of 24981 x 10-5 and the lowest magnetic susceptibility value was found in the first stage ball milling product with a milling time of 80 hours (BM1) which is 16678,1208 x 10-5. Based on the XRF test, the percentage of Fe element in the samples increases from 27.877% to 34.279% after 40 hours milling time, while the percentage of Si elements decreases from 46.769% to 39.958% after 40 hours milling process. These results show that the ball milling process has succeeded in separating magnetic elements from nonmagnetic elements.
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    PENGARUH KECEPATAN PUTARAN TABUNG BALL MILLING TERHADAP KOMPOSISI MORFOLOGI DAN SUSEPTIBILITAS DARI PARTIKEL OKSIDA BESI PASIR ALAM SUNGAI ROKAN
    (Elfitra, 2022-01) Islamy, Herlangga El; Salomo, Salomo
    The speed of ball milling vial affects the magnetic properties of its product. Research on the composition, morphology and magnetic properties of natural sand particles from Rokan River as a function of the vial speed . The sample of natural sand was collected with a mass of 10 Kg and then dried under the sun ray before the separation process between magnetic and non-magnetic particles using an Iron Sand Separator (ISS). The result of the separation with the Iron Sand Separator is called the ISS product. The ISS products were milled as a function the vial speed namely 100rpm, 150rpm and 200rpm. The number of milling balls used was 16 and are made of ceramic balls with diameter of 1.5 cm. The products of ball milling was then separated using Neodymium Iron Boron (NdFeB). The results of this study indicate the magnetic induction values of the samples ranged from 7,032-7,499 mT for the same current of 400 mA, while the magnetic susceptibility values obtained is around 34738,455 - 43686,529 × 10-5 . the elemental composition the ball milling products was carried out using X-Ray Fluorescence (XRF) The results showed that the Fe composition increased from 13.892% to 32.561% while the Si composition decreased from 56.53% to 38.556%. The morphological properties of the ball milling products was carried out using Scanning Electron Microscope (SEM). The results showed that the particle size decreased from 1.583 m to 0.5028 m. The results showed that the optimum speed for the vial is at a speed of 200 rpm.