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Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
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Core Subject : Engineering,
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Articles 3,145 Documents
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Sintesis Zeolit 4A Dari Bahan Dasar Abu Limbah Sawit Dengan Variasi Lama Pengadukan Gel Dan Perbandingan Volume Natrium Silikat Dengan Natrium Aluminat Nila Sari Siregar; Fajril Akbar; Rozanna Sri Irianty
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Zeolite 4A is one of the synthetic zeolite which it is used as ion exchange. This zeolite can be synthesized from silica and alumina. This study aims to utilize the waste in the oil industry as the base material zeolite 4A synthesis and get the best conditions influence the volume ratio of reactants (sodium silicate/sodium aluminate), and long agitation in 4A zeolite synthesis process. 4A zeolite can be synthesized from the ashes of waste oil were melted with sodium hydroxide to make sodium silicate. 4A zeolite synthesis reaction process is done by mixing the reactants (sodium silicate and sodium aluminate) with variation 55:45, 60:40 and 65:35 v:v as well as the long stirring time of 1, 2 and 3 hours, followed by heating at 80 ° C for 8 hours. Zeolite synthesis results were characterized using Fourier Transform Infrared Spectrophotometry (FTIR) and X-ray Diffraction (XRD). Zeolite 4A crystallinity best result on the condition of the reactants variation 65:35 ml:ml with stirring 3 hours long and the highest ratio of 1.499.Keywords : ash waste oil, spektofotometri FTIR, XRD, zeolite 4A.
Pemisahan Emas Pada VGA (Video Graphics Array) Komputer Dengan Metode Leaching Dan Presipitasi Juliani Dafis; Yusnimar Yusnimar; Drastinawati Drastinawati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The development of electronics technology is correlated to increasing use of electronic device, it causes a buildup of electronics waste every year. An example is Video Graphics Array (VGA) Computer still has the precious metals components. In this research, gold separation process of VGA computer has been done by using variation ratio samples : HNO3 solvent (1: 3; 1: 6; 1: 9) and two precipitants NaHSO3 and H2C2O4. Initially VGA cut into size from 5-10 mm, then it was leaching by HNO3 solvent at 70 ℃ for 1 hour. Afterwards filtrate is separated from residual sludge. Residual sludge was leaching using Aqua regia at 70 ℃ for 30 minutes to dissolve gold. Then, Au filtrate is obtained are diluted using Aqua DM until the volume 50 mL. The concentration Au is analyzed by AAS (Atomic Absorption Spectrophotometer). In the precipitation process NaHSO3 and H2C2O4 were applied in order to get Au solid. Result Au content of VGA is 76.2 ppm. For 5 gram amount of sample is obtained 1.07 grams Au solid using NaHSO3 as a precipitant.Keywords: Au, Computer VGA, leaching, precipitant,
Pemanfaatan Minyak Jelantah Menjadi Biodiesel Dengan Katalis ZnO Presipitan Zinc Karbonat : Pengaruh Waktu Reaksi Dan Jumlah Katalis Hamsyah Adhari; Yusnimar Yusnimar; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Biodiesel is a highly potential material to replace diesel fuel. Renewable and environmentally friendly. Waste cooking oil can be used as raw material for making biodiesel. Free fatty acid levels are high in waste cooking oil requiring pretreatment (esterification) in the process of making biodiesel. In this study transesterification reaction conducted by catalyst synthesized ZnO of ZnCO3. This study aims to determine the effect of variations in reaction time and variations the amount of catalyst to yield biodiesel produced. After esterification of free fatty acid levels in the oil can be lowered from 6.09% to 1.02%. The transesterification reaction was held at temperatures 65oC; The mole ratio of oil and methanol is 1:18; ZnO catalyst amount is 0,5%, 0,6% and 0,7%; reaction time is 50, 75, and 100 minutes. The highest biodiesel yield obtained was 94.31% on the amount of catalyst 0.7% w / w of cooking oil with a reaction time of 100 minutes. Characteristics of biodiesel produced, namely: density and viscosity at a temperature of 40°C is 866,50 kg/m3 and 5,74 mm2/s, The flash point is 190oC, acid value 0,60 mg-KOH/g-biodiesel and the content of alkyl ester 98,42%.Keywords: Biodiesel, Waste Cooking Oil, Esterification, Transesterification, ZnO
Sintesis Dan Karakterisasi Hidroksiapatit Dari Cangkang Kerang Darah Dengan Proses Hidrotermal Variasi Suhu Dan pH Bona Tua; Amun Amri; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Hydroxyapatite (HAp) Ca10(PO4)6(OH)2 is a calcium phosphate compound which is bioactive ceramic material with high bioafinitas. It is one of bones and teeth constituent. In this research, HAp was synthesized by hydrothermal process with pH reaction of 8, 10, 12 and temperature reaction of 130, 150 and 170oC. Samples were characterized by Transform Infrared Spectroscopy (FTIR). The results of FTIR analysis revealed that synthesis of HAp with hydrothermal process showed the formation of hydroxyapatite with the presence of peaks PO43- and OH-. The best condition in this research at pH 12 with reaction temperature 170oC.Keywords: Blood cockle shell, characterization, hydroxyapatite, hydrothermal.
Pengendalian Banjir Pada Kawasan Mutiara Witayu Kecamatan Rumbai Pekanbaru Sovia Revina; Bambang Sujatmoko; Manyuk Fauzi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Regions Mutiara Witayu is an area with low ground, where not all runoff from rainwater can flow by gravity into the Siak River, when the high tide happen on Siak River during the rainy season there will be some back waters, so the water that should be drainaged to Siak River become overflow. This study aims to determine the capacity of the pump to serve the existing flood volume. From the calculation of flood volume that can be accommodated by the reservoir is at 5050, 876 m3. To overcome the flood in the area Mutiara Witayu completely due to R5, R10 and R25 without causing inundation by using a pump with a capacity of 6 m3 / sec. The using of 5 m3 /sec pump’s power can be used to solve the flood due to R5, R10 and R25 in the Regions Mutiara Witayu with 2908.981 m3 storage capacity will be required.Keywords: flood, ponds reservoirs, pumps
Densifikasi Produk Karbonisasi Pelepah Sawit Menjadi Briket Menggunakan Crude Gliserol Produk Samping Biodiesel Sebagai Filler Arief Maulana Ilham; Zuchra Helwani; Warman Fatra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Palm frond has been utilized only for raw source of animal feed, compost and organic fertilizer in plantation area. Oil palm fronds has calorific value of 17.200 kJ/kg. Calorific value can be enhanced by carbonization followed by densification. By carbonization, the elements of smoke maker is able to be minimalized, so it will produce the green exhaust gases. Biomass densification aims to increase density and decrease handling issue such as storage and transportation. Calorific value of densification product can be enhanced more by adding filler like crude glycerol that has calorific value of 25.932,75 kJ/kg. This research aims to produce bricket using densification form palm fronds, to know the impact of particle size, filler composition and pressing pressure in product forming also to know the resulted calorific value and compressive strength of resulted product. Particle size used were 60, 80 dan 100 mesh. Filler composition used were 90 : 10, 80 : 20 dan 70 : 30. Pressing pressure used were 80, 90 dan 100 bar. Highest calorific value resulted was 27.359 kJ/kg at 100 mesh particle size, filler composition of 90:10 and pressing pressure of 100 bar. Highest compressive strength resulted was 37,2 Kg/cm2 at 60 mesh particle size, filler composition of 90:10 and pressing sressure of 100 bar. The most affecting factor to calorific value and compressive strength are filler composition and pressing pressureKeywords: Densification, Carbonization, Compressive Strength, Calorific Value, Oil Palm Fronds
Pembuatan Koagulan Cair Dari Lempung Gambut Untuk Pejernihan Air Yunita Selonika; Jhon Armedi Pinem; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Clay is one of the abundant natural resources and have not been used optimally. Value for clays can be improved further. Utilization of clay as a source of liquid coagulant is one way of increasing value of the clay. The aim of research was to make liquid coagulant from clay peat with extraction process and determine the percentation of extraction. The powdered clay was calcined at a temperature of 750oC for 1 hour extracted using sulfuric acid for 60, 90 and 120 minutes at a temperature of 95°C. The slurry was filtered to obtain the filtrate which was a liquid coagulant. Liquid coagulant extracted during the process of 120 minutes has the highest of percent aluminum and iron extraction.Key words : coagulant, coagulation, extraction, peat clay
Sintesis Hidroksiapatit Melalui Precipitated Calcium Carbonate (PCC) Kulit Kerang Darah Dengan Metode Hidrotermal Jefry Soclin Sianipar; Yelmida Azis; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Hydroxyapatite Ca10(PO4)6(OH)2 is a calcium phosphate compound which is bioactive ceramic material with high bioafinitas and the principal inorganic constituent of bones and teeth. Hydroxyapatite (HAp) materials used as bone implants, adsorbents and catalysts. In this research synthesis of hydroxyapatite can be made by using material which is rich of CaCO3 like PCC blood calm shell with a composition of 95.5% CaCO3. PCC blood calm shell which has calcium source was synthesized to HAp by hydrothermal process with varied rasio Ca/P (1.61, 1.67, and 1.73) and reaction temperature (140oC, 160oC, 180oC, and 200°C). HAp synthesized result has been analyzed using X-ray Diffraction (XRD), scanning electron microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The results of FTIR analysis, synthesis of HAp with hydrothermal method through precipitated calcium carbonat (PCC) showed the formation of hydroxyapatite in the presence of peaks PO43- dan OH-. The highest peak is obtained at ratio Ca/P 1.61 at reaction temperature of, 140°C, 160°C, 180°C, and 200°C. XRD diffraction results in hydroxyapatite get the highest purity obtained at ratio Ca/P of 1.61 at temperature of 180°C with a hexagonal crystal structure. The results of SEM-EDX analysis, show that the morphological form of agglomerates or clumping . The molar ratio of Ca/P of hydroxyapatite which is made from sea shells seashell waste through the PCC is 1,77.Keywords : PCC Blood Calm Shell, pH, Temperature, Hydroxyapatite, Hydrothermal Method.
Pengaruh Penambahan Dispersant Dan Waktu Pengadukan Pada Pembuatan Scaffold Hidroksiapatit Menggunakan Sabut Gambas Sebagai Template Heni ' Ismawati; Ahmad ' Fadli; Fajril ' Akbar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
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Hidroxyapatite (HA) scaffold has been widely applied in the biomedical field especially for bone implants. The purpose of this research is to determine the Influence of dispersant addition and stirring time on HA scaffold which formed using gambas sponges as template. HA slurry was made by mixing 10 grams of HA, 12 grams of aquadest, 0.2; 0.25; 0.3 grams of Darvan 821A and 1 gram of sago. Slurry was impregnated into gambas sponges. Sample then dried at 110oC for 3 hours. The green bodies was burned at 600oC for 1 hour and followed by sintering at 1250oC for 1 hour. The results showed that addition of dispersant and increasing of stirring time lead to smaller porosity and shrinkage. In addition 0,2; 0,25; and 0,3 grams dispersant, the resulting porosity in the range of 63.85-70.78%; 58.74-70.35%; and 53.42-69.66%. Shrinkage 39.43-53.71%; 27.75-50.68%; and 13.61-41.25%. Compressive strength 0.61-1.05 MPa; 2.88-3.81MPa; and 0.52-2.96 MPa. The macroporous and microporous average pore sized were 50 μm dan 5 μm.Keywords: bone implant; dispersant; gambas; hidroxyapatite; scaffold
Pengaruh Kombinasi Proses Pretreatment (Koagulasi-Flokulasi) Dan Membran Reverse Osmosis Untuk Pengolahan Air Payau Sastra Silvester Ginting; Jhon Armedi Pinem; Rozanna Sri Irianty
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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In general, Riau coastal communities difficult to get clean water because the water resources in the coastal areas of brackish water is not to be used for everyday life. Therefore, the necessary technology for processing brackish water into clean water. This research aims to determine the performance of the process of coagulation-flocculation and reverse osmosis membrane on processing brackish water into clean water. Reverse osmosis membrane used is a type of spiral wound measuring 0,0001 μm and coagulant used PAC coagulant. In this study, the variable used is the concentration of PAC coagulant and reverse osmosis membrane operating pressure. Experiment result obtained the optimum condition of PAC coagulant concentration is 150 mg/L, which PAC can be designated turbidity up to 88.46% and 91.84% hardness. At a pressure of 8 bar, permeate flux preceded by coagulation-flocculation of 25.81 L/m2.jam. Rejection coefficient at a pressure of 8 bar brackish water after coagulation-flocculation had 98.72% of TDS; 96.99% of turbidity; 97.62% of organic substances; 96.37% of hardness and 92.4% chloride.Keywords: brackish water, coagulation-flocculation, reverse osmosis membranes.

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