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All Journal Reaktor Jurnal Sains dan Teknologi Mechatronics, Electrical Power, and Vehicular Technology Jurnal Sains Materi Indonesia Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Konversi Journal Of Chemical Process Engineering (JCPE) Indonesian Journal of Chemistry Communications in Science and Technology Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Teknomekanik Unri Conference Series: Community Engagement Journal of Applied Materials and Technology Journal of Bioprocess Chemical and Environmental Engineering Science Journal of Community Engagement Research for Sustainability SAINSTEK Estungkara: Jurnal Pengabdian Pendidikan Sejarah Journal Of Chemical Process Engineering JURNAL REKAYASA KIMIA & LINGKUNGAN Journal of Engineering and Technological Sciences Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran
Amun Amri
Department Of Chemical Engineering, Faculty Of Engineering, Riau University
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Nursing Public Health Social Sciences Other

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Penggunaan Zat Aditif Graphene Pada Campuran Asphalt Concrete- Wearing Course (AC-WC) Syukri Hamdani; Muhammad Shalahuddin; Yosi Alwinda; Amun Amri
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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Abstract

One type of road pavement layers that susceptible to damage is Asphalt Concrete-Wearing Course (AC-WC). AC-WC is the top layer of the road pavement structure. One effort that can be carried out to improve the quality of asphalt pavement is to modify the asphalt mixture materials by using additive. Graphene is one of the materials that can be used as asphalt additive. Several previous studies have used this material in various reinforcement structures. The aim of this study was to determine the effect of using asphalt that has been mixed with graphene as the additive in the AC-WC mixture based on the value of Marshall characteristics. Variations made in this study were 0% (without mixture) as a comparison, 0.5%, 1%, and 1.5% of asphalt weight. This research was carried out by designing the AC-WC mixture based on the gradation specifications of combined aggregate for each variation. The specimens of Marshall test were made for each variation. Graphene was made by using the Electrochemical and Mechanical Liquid Exfoliation (EMLE) method. The results showed that the use of graphene as the additive in the AC-WC mixture affected the value of Marshall characteristics. The best value that meets the general specifications of Bina Marga 2010 revision 3 was obtained in the addition of 1.5% graphene, with stability value 1485 kg or an increase of 28.57%, flow value 4.25 mm, VIM value 6%, VMA value 18.3%, VFA value 65%, and MQ value 345 kg/mm.Keywords: Graphene, Additives, AC-WC, General Specifications of Bina Marga 2010 Revision 3, Marshall
Pelapisan Permukaan Stainless Steel 316L Menggunakan Hidroksiapatit Dengan Metode Deposisi Elektroforesis Muhamamad Rizky Zuriadi; Ahmad Fadli; Amun Amri
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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Hydroxyapatite (HA) is ceramic that can be used as bone implants and teeth. However hydroxyapatite has a weakness in terms of its weak physical properties so it need to be modified with hydroxyapatite coating on a metal surface. The purpose of this study is to determine the influence of pH and concentration of hydroxyapatite. Hydroxyapatite was coated on the surface of Stainless steel using electrophoretic deposition method. HA suspension with concentration 0,025 and 0,075M were made by mixing 0,0425 and 1,3575 gr with ethanol and then set to pH 3,4 and 10 by adding HNO3 and NH4OH. Subsequently, the coating process was carried out by dipping Stainless steel and carbon electrode into hydroxyapatite suspension. The hydroxyapatite suspension was electrified with a voltage of 60 V for 2 minutes. Then hydroxyapatite coating was calcined with temperature of 800o C for 2 hours. SEM analysis shown that the thickness of HA deposits was 32-52 μm at HA concentration of 0,025 M and it increased to 42-57 μm at HA concentration of 0,075 M. The thickness of HA deposists was 60-80 μm at pH 3 and it decreased to 40-50 μm at pH 10. corrosion rate analysis shown that HA coating can reduce corrosion rate of stainless steel. FTIR analysis showed PO43-, OH, and H2O groups that indicates the content of hydroxyapatite from sample. Keywords : coating, electrophoretic deposition, hydroxyapatite, stainless steel
Pirolisis Kayu Pinus (Pine Merkusil) Menjadi Bio - Oil Menggunakan Katalis NiMo/NZA Irwan Irwan; Syaiful Bahri; Amun Amri
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

Availability of petroleum as a fuel that can not be updated further reduced by increasing the use of oil for human needs. For that we need to do a conversion innovation of energy that do not depend on fossil resources and can be renewable and have an output similar to that produced from fossil resources. One such innovation is the conversion of biomass derived from pine merkusii wood to bio-oil. Bio-oil can be produced by pyrolysis of pine merkusii wood with catalyst NiMo/NZA. Objective this research to produce bio-oil from pine merkusii wood as an alternative fuel, studying the effect of the weight ratio of the catalyst NiMo/NZA to the biomass, studying the effect of metal impregnation Nickel (Ni) and Molybdenum (Mo) on Natural Zeolite deAluminated (NZA) and characterization of physical properties and chemical properties of bio-oil. Process pyrolysis was carried out at 320 0C, silinap 500 ml, 50 grams of biomass with + 100-200 mesh sieve size, variations in the catalyst NiMo/NZA to the biomass of 3%; 5% and 7% by weight and Nickel-Molybdenum metal variation on NZA of 0%; 1%; 2% and 3%. The results of this study produce bio-oil yields the largest on the use of the catalyst NiMo/NZA 5% by weight of the metal content of 3% by 65,076%. Characterization of physical properties of bio-oil obtained in the form of density 0,986 g/ml, 15,816 cSt viscosity, acidity 36,879 mg NaOH/g sample, flash point 48 0C and calorific value 39,12 MJ/kg. While the characterization of the chemical properties of bio-oil using Gas Chromatography-Mass Spectroscopy (GCMS) obtained some dominant chemical components such as phenol (19,42%), toluene (13,48%), tetradecanoic acid (12,93%), phenol,2-methoxy (12,18%), acetone (11,72%), benzene,1,2-dimethoxy (9,30%), and 2-furancarboxaldehyde (3,76%).Keywords: bio-oil, catalyst NiMo/NZA, pine merkusii wood, pyrolysis
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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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.
Pembuatan Coating Copper-Cobalt Oksida Melalui Proses Sol Gel Dan Dideposisikan Secara Spray Coating Pada Substrat Alumunium Ramadhan Ramadhan; Amun Amri; Yelmida Yelmida
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
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The research aims to synthesis the mixed copper and cobalt oxides coating in alumunium substrate for solar selective absorber (SSA) using sol-gel spray coating method. The coating were characterized using UV-Vis-NIR, X-Ray diffraction, Scan Electron Microscope (SEM) and adhesion test. The sol precursor were copper nitrate and cobalt nitrate. The sol precursor are made by dissolve the granules Cu(NO3)2.3H2O and Co(NO3)2.3H2O into the etanol solvent and added propionate acid. Mix the two solution and then stirred at room temperature for two hours in a closed state. The coating process was done by using a spray gun which is connected by using a compressor. The result of researching showed that sample with precursor concentration 0.25 M and 30 x spraying and drying cycle with (α) = 86.8%. further characteristic was obtained the value of emittance (ε) = 6.64%. The crystal structure of CuCo2O4, CuO and CoCo2O4 were found in XRD result analyst. The result testing of SEM showed that surface coating film relative homogen and the result testing of adhesion showed bond layer of coating categorized as 4B according to the standards ASTM D 3359.Keyword : coating, precursor, sol, solar selective absorber, spray coating
Uji Kinerja Bioeraktor Hibrid Anaerob Dua Tahap Pada Pengolahan Limbah Cair Industri Sagu Dengan Variabel Beban Kejut (Shock Loading) Apriadi Rio; Adrianto Ahmad; Amun Amri
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 wider the area of sago palm in Indonesia, the more rapid development of the industry in increasing the production of sago. Industrial production sago produce wastewater with high organic matter content, if discharged directly into the water body will continually degrade water quality and environmental pollution. Thus, needs to be processed with a technology prior to disposal, wastewater treatment technology is a two-stage anaerobic bioreactor hybrid. The purpose of this study is to test the stability and performance of the two-stage anaerobic bioreactor hybrid stone in anticipation of media change suddenly arriving feed flow rate due to the increasing production of sago industry. Hybrid anaerobic bioreactor working volume of two stages used in this study was 10 L in the first bioreactor and 20 L in the second bioreactor. Operation was carried out by giving a shock loads increasing the feed flow rate suddenly by 50%, 100% and 150% for 6 hours in the first bioreactor, and then returned to the first bioreactor flow rate was 5 L/day. The results showed that the two-stage anaerobic hybrid bioreactor stone mediated able to anticipate fluctuations in the production of industrial wastewater discharge sago with the feed flow rate suddenly by 50%, 100% and 150% indicates that the system recovery time of two stage anaerobic bioreactor hybrid was faster with a span of 5 to 6 days. The highest COD removal occurred at shock loads of 100% of 3.750 mg/L.Keywords: Anaerobic , COD Hybrid Anaerobic Bioreactor, Sago Wastewater, Shock Loading, Two Stage.
Sintesa Fluorinated Tin Oxide (FTO) Menggunakan Prekursor Ramah Lingkungan Dan Penambahan Graphene Dengan Metode Deposisi Spray Coating Untuk Aplikasi Material Konduktif Transparan Rino Rinaldi; Amun Amri; Khairat Khairat
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
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Fluorine doped tin oxide (FTO) films were fabricated on a glass substrate by a spray coating deposition methode. Non-toxic SnF2 was used as fluorine source to replace toxic HF or NH4F. Effect of SnF2 content, 0 – 10 mol% and 115 ppm graphene as comparison to the fluor content on the substrate, on structure, electrical resistivity, optical transmittance of the films and morfology were investigated using X-ray diffraction (XRD), Multimeter, UV–vis spectra and Scanning Electron Microscopy (SEM). Structural analysis revealed that the films are amorf with crystal structure. Grain size varies from 501 nm - 175 nm with increasing fluorine concentration, which in fact critically impacts resultant electrical and optical properties. The 300 °C-annealed FTO film containing 10 mol% SnF2 shows the lowest electrical resistivity 14,1 x 10-4 Ωcm, on 5x deposition repeat, optical transmittance 86,4% on 0 mol% SnF2 with once deposition repeat. The highest figure of merit 0,0453 x 104 Ω-1cm-1 which is used for standart of best quality of transparent conductive oxide (TCO). Because of the promising electrical and optical properties, F-doped thin films prepared by this green process are well-suited for use in all aspects of transparent conducting oxide.Keywords: Fluorine doped tin oxide (FTO) films, Transparent conducting oxide (TCO), Sol–gel dip-coating, Electrical resistivity, Optical properties, Figure of merit
Pembuatan Beton Berbasis OPC Dengan Penambahan Turbulence Assisted Shear Exfoliation (TASE) Graphene Febri Riandi; Amun Amri; Evelyn Evelyn
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
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Abstract

Concrete is the primary raw material for construction which consists of constituent materials in the form of portland cement, fine aggregate, coarse aggregate, water and with or without added materials. Graphene is a nano-sized and strong material. The use of graphene can be used as an additive (admixture or additive) to improve the quality and quality of concrete. This research aims to make concrete based on Ordinary Portland Cement (OPC) with the addition of graphene nanosheets (GNS), as well as to study the effect of increasing the number of graphene nanosheets (GNS) and differences in sand size on the mechanical properties and morphology of the resulting concrete. Concrete manufacture begins with preparing a graphene solution which is made by synthesizing pure graphite through the TASE method. Then the concrete is made by mixing all the materials to be used manually with the ratio of raw materials (cement: sand: gravel: water) is 1: 2: 3: 0.6 until homogeneous. The results of testing the mechanical properties of concrete show that the highest compressive strength is 21.75 MPa obtained from variations in the addition of 5% graphene with sand size gradations, namely mix (200 <x <100 with 100 <x12), the lowest porosity and water absorption is 9% and 3.94% was obtained from the variation of 5% graphene addition with sand size gradations, namely mix (200 <x <100 with 100 <x12), while the SEM analysis results showed that the higher the addition of graphene to the concrete matrix can reduce the porosity value of the concrete so that can improve the mechanical properties of concrete. Keywords: concrete, geopolymer, graphene, OPC, TASE
Hidrolisis Mikroalga Tetraselmis Chuii Menjadi Glukosa Menggunakan Solvent H2SO4 Dengan Variasi Waktu Hidrolisis Fajrina Qaishum; Amun Amri; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
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Indonesia is maritime countries with high marine biodiversity. Mikroalgae is marine biota which has an important role in an ecosystem water and it has the chemical composition such as, high carbohydrate, protein and lipid. Tetraselmis chuii is green microalgae that contains cellulose and hemicelluloses, which adequate were converted into glucose. Glucose is one of building compound for producing hydroksimetilfurfural, levulinat acid, formic acid, bio battery, bioethanol, etc. Glucose can be produced by hydrolyzing microalgae with dilute sulfuric acid use a solvent. Microalgae was dissolved in diluted sulfuric acid then heated at 100oC. The purpose of this research were obtained operation condition for biomass loading and hydrolysis time to glucose production. Tetraselmis chuii which biomass loading 3,5 gram disssolved in dilute sulfuric acid 1% during 10, 20, 30, 40 and 50 minutes. The result show that the highest concentration of glucose was obtained 7,27 g/L in biomass loading by using 3,5 gram of Tetraselmis chuii for 30 minute at 100oC.Keywords: dilute sulphuric acid, glucose, hydrolysis, microalgae, cellulose
Pengaruh Jumlah Siklus Dip-Drying Pada Sintesis Koating Tembaga-Kobalt Oksida Berbasis Nitrat Konsentrasi Tinggi Sebagai Solar Selective Absorber Dengan Metode Sol-Gel Dip-Coating Benny Ahmadi; Amun Amri; Ahmad Fadli
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
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Abstract

Solar Selective Absorber (SSA) is the most important part that determines the efficiency of solar thermal collectors. SSA should have high absorptance (low reflectance at wavelengths <2.5 m) and low emitance (high reflectance at wavelengths> 2.5 m). Solar selective absorber can be synthesized using sol-gel dip coating method. The purpose of this research is to know the effect variation number of dipping-drying cycles to absorptance copper-cobalt coating and get a coating of copper cobalt that have absorptance value is high (> 80%) and low emitance (<10%). The coating were synthesized by molar percursors 0.25:0.5M and number of dipping-drying cycles 1x, 2x, 3x, 4x, 6x, 8x and 10x. Reflektance spectra in the area of UV-Vis-NIR showed that increased cycles of dipping-drying cycles (which increases the thickness of the coating) increase the value of absorptance (α). The results showed that the highest absorptance value found in coatings which was synthesized using mixture copper nitrate and cobalt nitrate 0.25:0.5M M at 2x cycles (dipping and drying) with absorptance (α) = 84.90%. Further characterization showed emitance values (ε) = 13.2%.Keywords : aluminum, coating, solar selective absorber and sol-gel dip-coating
Co-Authors AA Sudharmawan, AA Abdul Rasyid Amrin Abid, Hussein Rasool Achmad Noerkhaerin Putra Adrianto Ahmad Affandi Affandi Ahmad Fadli Ahmad Fadli Ahmad Fadli Aisyah Dewi Ranti, Aisyah Dewi Akbar, Irfan Sarhadi Alfarizi, Cory Dian Ali Novia Altarawneh, Mohammednoor Aman Aman Aman aman Aman, Azka Aminati, Ikha Setya Amir Awaluddin Amri, Evelyn Andrizal Andrizal Ani Suryani Anjani, Putri Annisa Rahmat Apriadi Rio Ari Sandhyavitri Arisman Adnan Assylzhan, Mazhibayev Azhar, Muhammad Rizwan Azhari Harahap Azridjal Aziz Bahri, Ahmad Syaiful Bahruddin Bahruddin Bahruddin Bahruddin Bahruddin Benny Ahmadi Bona Tua Chairul Chairul Chairul Damayanti, Elok Deden Saprudin Dedeng Hermoyo Derry Hanriansyah Pratama Desi Heltina Dhini Octavianty Dimas Nofriyan Dwi Setyo Pambudi, Yoyok Ekawati, Lestari Elmira, Kambarova Erliza Hambali Esty Octiana Sari Esty Octiana Sari Eva Rantika Evelyn Evelyn Evelyn Evelyn Evelyn Evi Nadhifah Fabryza, Dhina Fajar Restuhadi Fajrina Qaishum Fakhri, Fakhri Fauziyah, Hidayatul Febri Riandi Febrizal Ujang Febryza, Dhina Feby Pratama Nugraha Fesya Putri, Andini Firman syah Fitri, Lara Ismano Fitria, Anisa Fri Murdiya, Fri Gilang Fathurrahman Gilda Miranda Gussyafri Hasnul Bustaman Hawa, Karfika Ainil Hawa, Karfika Ainil Hendri, Yola Bertilsya Hendro Ekwarso Heni Sugesti Heri Rahmana Indra Yasri Irwan Irwan Is Sulistyati Isna Rahma Dini Iwantono Iwan Barnawi Jhon Armedi Pinem Jiang, Zhong Tao Jumbri, Khairulazhar Karfika Ainil Hawa Khairat Khairat Khairat Khusnul Ain Komalasari Komalasari Komalasari Komalasari Lisa Legawati Lucy Rahmawati M. Fauzan Akbar M. Iwan Fermi Malindo, Muhammad Eri MAYANG SARI Mayangsari Mayangsari Meliagustin, Adilla Michael Hutapea Miran, Hussein A. Mochamad Reizal Ath Thariq Monita Olivia Muhamamad Rizky Zuriadi Muhammad Shalahuddin Muhammad Shalahuddin Muhammad Sugandi Muhammad Zaqi Muhdarina Nisa Mulya Novan, Andre Novia Azzahra Nurhayati Nurwijayanti Nurwulandari Saputri Ohi, Hiroshi Oktariandi, Vito Paul Destin Purba Peratenta Sembiring, Maria Perdana, Rendy Putra Peter Peter Prawiranegara, Barata Aditya Puji Rahmawati Dwi Sukma Putra, Rahmat Ade Putri Arini Putri Husni Hidayah, Putri Husni Putri, Diana Eka Rahayu, Ricky Puji Rahmadahana, Suci Rahman, M. Mahbubur Rahmansyah Rahmansyah Rahmat Kurniawan Nasution Rahmi, Sri Wahdini Ramadhan Ramadhan Rani Handayani Reni Yenti, Silvia Reski, M. Rifati Hanifa Rino Rinaldi Rizka Aulia Hardi, Rizka Aulia Rizky, Muhammad Dian Rozanna Sri Irianty Russita Martani Russita Martani Rusydy &#039; Salma Liska Saputra, Adika Saputra, Fakhri Sari Rahma Yanti Sari, Esty Octiana Sarma, Deki Septian, Handika Setia Utama, Panca Setiani Br Manurung Silvia Reni Yenti Silvia Reni Yenti Suci Afrianti Sukoco Sukoco Sukoco Sukoco Sunarno SUNARNO Sunarno Sunarno SYAIFUL BAHRI Syamsu Herman Syelvia Putri Utami Syukri Hamdani Tafrikhatul Walidah Tao Jiang, Zhong Utama, Panca Setia Voadi, Salsabilla Diva Wilda Zakiah Windy Odelia Putri Wira Irawan Rossani Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wisrayetti, Wisrayetti Wulandari, Revika Yang, Chun-Chen Yelmida Azis Yolanda, Yogi Yopalim Zanstra Yosi Alwinda Yosi Alwinda, Yosi Yusnimar Sahan Z Zulfansyah Zikri, Ahmed Zuchra Helwani, Zuchra Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar, Zultiniar Zuqni Meldha