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All Journal Jurnal Sains dan Teknologi Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Sains dan Teknologi: Jurnal Keilmuan dan Aplikasi Teknologi Industri
Zultiniar Zultiniar
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Pengaruh Suhu Dan Waktu Distilasi Terhadap Komposisi Kimia Asap Cair Dari Kulit Durian Widiya Widiya; Idral Idral; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Purification  of  liquid  smoke  is  very  important  for  the  safety  of  liquid  smoke  for preservative  food.  Distillation  was  done  reduces  carsinogenic  compound  such  as  tar  and benzo(a)pyrene and determined 1st, 2nd, 3th grade of smoke  liquid. The research was done using distillation process, with temperature and time variable. The results of GCMS analysis indicated no detected  tar and benzo(a)pyrene. Maximum  temperature  to get of  liquid smoke 1st  grade  at  125oC with  distillation  time was  30 minutes.  At  this  condition  value  of  acid, carbonyl  and  phenol  were  20.53%,  27.05%  and  0% Keywords: Pyrolysis, Distillation, Liquid Smoke
Sintesa Precipitated Calcium Carbonate (PCC) Dari Cangkang Kerang Darah (Anadara Granosa) Dengan Variasi Ukuran Partikel Dan Waktu Karbonasi Lucy Rahmawati; Amun Amri; Zultiniar Zultiniar; Yelmida Yelmida
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Precipitated Calcium Carbonate (PCC) is a product of the processing of natural materials containing calcium carbonate resulting from the precipitation process with high purity. Bloodcockle shell can be used as a source of calcium for precipitated Calcium Carbonate. The purpose of this study to produce PCC of waste shells blood with carbonation method and determine the particle size of the PCC and the best carbonation time. Synthesis performed using carbonation method by adding nitric acid to the slaking process. Blood cockle shell samples prior shells calcined at a temperature of 900°C for 3 hours to form calcium oxide and then dissolved with nitric acid (slaking process) with a particle size variation CaO (+ 20-60; + 60- 100; +100-120) mesh forming CaNO3, then added ammonia to pH 12, the next process of Ca (OH)2 CO2 gas flowing until the time was varied (0.5, 1, 1.5) hours to form a white precipitate which is precipitated Calcium Carbonate. The use of inorganic acids in this study aims to improve the solubility of CaO in the slaking process so that a high yield of the products obtained.The highest yield of PCC obtained at treatment +100-120 mesh particle size and carbonation time of 1.5 hours, with the percentage yield of 88.58%. Results of analysis Atomic Absorption Spectrophotometry (AAS) obtained CaCO3 content of 76.6%. From the pattern of X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM) can be seen form the resulting crystal is a mixture vaterit and calcite.Keywords : Blood cockle shell, Method of Carbonation , PCC , Particle Size , ,Time Carbonation
Pengaruh Diameter Dan Panjang Serat Pelepah Sawit Terhadap Sifat Dan Morfologi Wood Plastic Composit (WPC) Siti Sakinah; Bahruddin Bahruddin; 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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The length and diameter of the fibers of palm frond is one of the factors that affect the physical and mechanical properties of the material WPC. This study aims to determine the effect of fiber diameter and length of the palm fronds to the properties and morphology of wood plastic composite (WPC). WPC samples prepared by the method of melt blending the fibers of palm fronds, PP, Maleated polypropylene (MAPP), and paraffin for 65 minutes at a temperature of 170 ° C and a rotor speed of 80 rpm using the Internal Mixer. The length and diameter of the fibers of palm fronds used is ± 1 mm, 1 cm and 5 cm in diameter filler: - 40 ~ + 60 mesh, - 60 ~ + 80 mesh and - 80 ~ + 100 mesh. While the ratio of the weight ratio of PP / fiber palm fronds are 50/50 and 70/30. The test results showed that the best mechanical properties resulting in a length of 1 mm and the diameter of the fiber - 80 ~ + 100 mesh at a ratio of polypropylene / palm frond fibers 70/30 with a value of 16.44 MPa tensile strength and flexural strength 31.21 MPa. In testing the physical properties of the best value generated with the water content value of 8,61%, the absorption value of 1.78%, the highest density value of 0.99 g /cm3 and thickness swelling lowest value of 0.33%, while in the SEM testing, interaction between filler and matrix are still lacking thus forming agglomeration as a result of the fiber and the matrix material evenly mixed at WPC.Keywords: fiber diameter, fiber length, physical, mechanical, morphological, wood plastic composite
Impregnasi Logam Co, Cu Dan Ni Pada Hidroksiapatit Yang Disintesis Dari Kulit Kerang Lokan (Gelonia Expansa) Nuruzzaman Shiqhi; Yelmida A; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari 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 compound of calcium phosphate which is the main constituent of the inorganic component of human hard tissue such as bone and teeth. Hydroxyapatite (HAp) is a material used as a bone implant, adsorbents and catalysts. In this study, hydroxyapatite supported Cu catalyst was prepared using wet impregnation method. A series of Cu-HAp catalysts have been prepared by varying the amount of Cu viz., 3, 6 and 12 % w/w. The solutions were dried with stirring 350 rpm at 30 oC for 24 h. The dried samples were kept in oven maintained at 105 oC for a duration of 1 h. Finally, the dried catalyst were calcined at 500 oC for 3 h. The best results of the catalyst Cu-HAp used as the ratio to the metal Co and Ni. Impregnation results were analyzed using FTIR spectrophotometer, Surface Area Analyzer (SAA), X-ray diffraction (XRD) and Scanning Electron Microscopy - Electron Dispersive X-ray (SEM-EDX). Based on the analysis SAA synthesized HAp surface area was 17.753 m²/g, while the metal-HAp most optimal in Cu-HAp (3%) reached 31.138 m²/g, meaning that the increase in surface area reaches 75%. Results of analysis by X-ray diffraction, it shows insignificant different compare to HAp catalyst. Results of elemental analysis by SEM-EDX showed that the metal impregnation process on hydroxyapatite was quite successful. The impregnation process is influenced by stirring, drying and calcination process. Keywords: calcination, catalyst, hydroxyapatite, impregnation, metals (Cu, Co and Ni)
Sintesis Hidroksiapatit Melalui Precipitated Calcium Carbonate (PCC) Cangkang Kerang Darah Dengan Metode Hidrotermal Pada Variasi pH Dan Waktu Reaksi Ari Wibowo Harahap; Zuchra Helwani; Zultiniar Zultiniar; Yelmida Yelmida
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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 a bioactive ceramic material with high bioafinitas, used as bone implants, adsorbents and catalysts. 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. In this research, PCC blood calm shell which has calcium source was synthesized to HAp by hydrothermal process. pH of the reaction (10, 11, 12) and time reaction (22,24,26 hours) was be varied. The outcome of synthesis was characterized by using FTIR, XRD, SEM. The results of FTIR analysis, synthesis of HAp with hydrothermal method showed the formation of hydroxyapatite in the presence of peaks PO43- dan OH-. The highest peak is obtained at pH 10,11,12 at time reaction of 26 hours. XRD diffraction results in hydroxyapatite get the highest crystallinity at pH 12 at time reaction 26 hours with a hexagonal crystal structure and produce a more pure hydroxyapatite. SEM results showed morphology with clots and irregular round shape.Keywords : PCC blood calm shell, pH, time reaction, hydroxyapatite, hydrothermal method.
Pembuatan Bioplastik Berbasis Pati Ubi Jalar Dan Polyvinyl Alcohol (PVA) Menggunakan Graphene Sebagai Filler Dan Gliserol Sebagai Plasticizer M. Fauzan Akbar; Amun Amri; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The aim of this research is to study the impact of graphene and glycerol addition on the mechanical properties, functional group, biodegrability, water uptake and morphology of the sweet potato and polyvinyl alcohol (PVA) based bioplastic. Bioplastics were synthesized using solution casting method with graphene addition of 0, 1, 2, 3%wt and glycerol addition of 20, 30, 40%wt into the sweet potato starch-PVA polyblend. Bioplastics were then tested their mechanical properties, morphology (SEM), functional group (FTIR), biodegrability, and water uptake analysis. The results showed that the addition of graphene increased the tensile strength, and the Young modulus, but decreased the elongation. Meanwhile, the addition of glycerol increased elongation, but decreased the tensile strength, and the Young modulus of bioplastics. The bioplastic produced using 3% of graphene and 20% of glycerol had the best mechanical properties with tensile strength of 16.76 MPa, elongation of 95.505%, and Young modulus of 17.549 MPa. Water uptake and biodegrability decreased as the increase of graphene content and increased as the increase of glycerol content. The sweet potato – PVA based bioplastic with the addition of graphene has a good perspective to develop further.Keywords : bioplastic, glycerol, graphene, mechanical properties, PVA, sweet potato starch
Penyisihan Logam Pb Air Lindi Tpa Muara Fajar Menggunakan Tanah Lempung Dengan Metode Pertukaran Ion Resty Maiyola; Shinta Elystia; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Landfill leachate treatment at Muara Fajar there are still many obstacles. At the pool fourth treatment, Metal Pb and Cu and hardness concentration is high, so it needs further treatment before being discharged into the environment. The purpose of this research is an alternative water treatment technologies for Muara Fajar landfill leachate, in order that the leachate does not pollute the environment. This research uses ion-exchange column with a clay medium for lower concentrations of Pb, Cu and hardness with high of colom 1.2 m and 2 inches diameter with clay -15 + 20 mesh size, the variation used is the bed height 40, 60, and 80 cm and the discharge flow 80,100, and 120 ml / min. The results of analysis of effluent concentration of Pb metal is 0.41 mg / L, Cu, 0.51 mg / L, and 283 mg / L for hardness. This concentration has reached the quality standard limits the Minister of Environment Decree No. 51 Year 1995 for bed height and discharge flow is 80 cm and 80 ml / min with a CEC of 80 meq / 100g.Keyword : Bed height, Clay, Discharge flow, Ion Exchange, Landfill Leachate.
Penurunan Konsentrasi Logam Ni Pada Limbah Cair Elektroplating Dengan Bionanomaterial Chitosan Dari Limbah Cangkang Kulit Udang Juniwarnis Juniwarnis; Shinta Elystia; Zultiniar Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Chitosan is one of the solutions in reducing heavy metal contamination inelectroplating industrial wastewater. Bionanomaterial chitosan has better ability because it has a specific surface area and nano-scale particle size. This research uses bionanomaterial chitosan to remove Ni from electroplating wastewater. This study aims to determine the effect of bionanomaterial chitosan concentration andstirring time in removing Ni in electroplating wastewater with variation ofconcentrations of 4000; 8000; 12000; and 16000 mg/L and stirring times of 30, 60 and 90 minutes using jar test. The initial concentration of Ni in electroplating wastewater was 2,025 mg/L. After the adsorption process, the highest efficiency value for Ni was 98,667 % at bionanomateial chitosan concentration of 8000 mg/Land a stirring time of 30 minutes.Keywords: Bionanomaterial Chitosan, Adsorption, Ni, Electroplating Waste Water.
Perengkahan Katalitik Limbah Plastik Jenis Polypropylene (PP) Menjadi Bahan Bakar Minyak Menggunakan Katalis Zeolit A Aldi Okta Priyatna; Zultiniar Zultiniar; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Fly ash (FA) sample derived from Indonesia coal were used as raw material to synthesis A zeolite catalyst. The physicochemical properties of FA and A zeolite were characterized by atomic absorption spectroscopy (AAS) and X-ray diffraction (XRD). Catalytic activity of A zeolite wastested in catalytic cracking of polypropylene plastic waste to obtain biofuel. It was found that the highest yield of biofuel obtained using 1.5% A zeolite catalyst with a temperature of 450oC for 60 minutes is 76.82%. In addition, physical properties of biofuel which are density, caloric value wereobtained 0.78 g/mL and 10.26 cal/g, respectively. For chemical compound, it was found that the most dominant was gasoline and kerosene-diesel with fraction percent of 39.80 and 32.65,respectively.Keywords : A Zeolite, Catalytic Cracking, Fuel, Plastic, Polypropylene
Pengolahan Sampah Plastik Polypropylene (PP) Menjadi Bahan Bakar Minyak Dengan Metode Perengkahan Katalitik Menggunakan Katalis Zeolit X Ekky Wahyudi; Zultiniar Zultiniar; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The objective of this research was to convert a waste plastic into liquid fuel using zeolite X catalyst which it was synthesized from coal fly ash. In this study, 100 grams of polypropylene-type plastic were cracked in a batch reactor at 350 400 and 450o C for 60 minutes with various catalyst/plastic ratios was 0.5; 1.0;1.5 (wt%). Highest yield (%) was 76.09% that obtained at 450o C and catalyst/plastic ratio was 1.5%.Keywords : Cracking, Liquid fuel, Polypropylene, Waste plastic, Zeolite X 
Co-Authors Affananda Taufik Affandi Affandi Ahmad Fadli Aldi Okta Priyatna Amun Amri Ardago Lengga Muda Siregar Ari Wibowo Harahap Bahruddin Bona Tua Deska Deska Dewi Indah Pratiwi Dhini Octavianty Dian Anggraini Purba Dini Aulia Sari Ermal Dovy Reyandi Ekky Wahyudi Fachry Abda El Rahman Fadly Sitohang Hafiz Hafiz Idral Idral Indah Fitriani Jefry Soclin Sianipar Juniwarnis Juniwarnis Khamaluddin Aditya Khodijah Khodijah Komalasari Komalasari Lucy Rahmawati M. Fauzan Akbar Mohd. Rafiq Muhammad Yusro Annur Nurrassyidin Nurrassyidin Nuruzzaman Shiqhi Paul Destin Purba Putri Fatihah Zuhrah Rathesa Najela Regina Giantika Resty Maiyola Riris Verawati Roselyn Indah Kurniati Rozanna Sri Irianty Shinta Elystia Siska Priscillia Aledya Siti Sakinah Sri Hidayanti Sry Utami Pardede Sudung Sugiarto Siallagan Syafrima Wahyu Syafruddin Syafruddin Utami Khairunnisa Widiya Widiya Widya Pangestu Yelmida Azis Yusnimar Sahan Zuchra Helwani