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All Journal Jurnal Sains dan Teknologi Jurnal Sains Materi Indonesia Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Ilmiah Pertanian Indonesian Journal of Chemistry JMM (Jurnal Masyarakat Mandiri) Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Unri Conference Series: Community Engagement Indonesian Journal of Chemical Science and Technology Journal of Applied Materials and Technology Journal of Bioprocess Chemical and Environmental Engineering Science Journal of Community Engagement Research for Sustainability Indonesian Journal of Fundamental Sciences Komunita: Jurnal Pengabdian dan Pemberdayaan Masyarakat

Ahmad Fadli

Universitas Riau

Author-ID : 2180892

Agriculture, Biological Sciences & Forestry Humanities 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 Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Sintesis Hidroksiapatit Dari Precipitated Calcium Carbonate (PCC) Terumbu Karang Menggunakan Metode Hidrotermal Dengan Variasi Temperatur Reaksi Yunus Olivia Novanto; Yelmida Azis; Ahmad Fadli
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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Coral reefs that have been damaged so far are not utilized and only pollute the coast. Even though coral reefs are composed of calcium carbonate compounds which can be used for the synthesis of hydroxyapatite, an important mineral found in human bones. The purpose of this study was to synthesize HAp from precipitated calcium carbonate (PCC) coral reef using the hydrothermal method, determine the effect of temperature on the characteristics of HAp and determine the best temperature for making HAp using the hydrothermal method. Coral PCC and (NH4)2HPO4 were reacted with an initial Ca/P ratio of 1,77 and the reaction temperature varied from 110oC, 120oC, 130oC, 140oC, 150oC, 160oC and 170oC for 14 hours. Then the crude HAp was washed using distilled water to pH 7 and dried at 110oC. The synthesized hydroxyapatite was then analyzed using X-ray Diffraction (XRD) and Scanning Electron Microscopy-Electron Dispersive X-ray (SEM-EDX). The results of the XRD analysis showed that the diffractogram peak of the synthesized HAp was similar to the standard with the best crystallinity of 82,28% at 140oC, while the smallest crystal size was 19,5 nm at 170oC. For the results of SEM-EDX analysis, the synthesized HAp has a uniform particle size with the final ratio of Ca/P at 140oC is 1,76 and at 170oC is 1,96. Based on those analysis, the hydroxyapatite synthesized from PCC coral using the hydrothermal method has the best characteristics at the reaction temperature of 140oC and has met the ISO 13779-2-2008 standard as a bone impant.Keywords: coral, hydroxyapatite, hydrothermal, PCC, temperature.

Optimasi Pembuatan Tricalcium Phospate (TCP) Berpori Dengan Metode Protein Foaming-Starch Consolidation Menggunakan Analisa Response Surface Methodology (RSM) Adi Maulana Putra; Ahmad Fadli; Zuchra Helwani
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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Porous Tricalcium phosphate is a material that can be used as bone substitute. Protein foaming-starch consolidation method is a technique to produce Porous Tricalcium Phosphate (TCP) using yolk as an agent to form pore. This research aims to know the influence of slurry composition and temperature rising rate of sintering on physical, chemical and mechanical properties of porous TCP and to conduct characterization porous TCP in accordance with standard as synthetic bone graft. This research was begun with mixing the TCP powder, starch, Darvan 821A and yolk. Slurry was stirred mechanically in speed of 150 rpm for 3 hours. Slurry was poured in mold and heated in oven with the temperature of 180°C for an hour. Then sample was released from mold and burnt at 600°C ended by sintering at 1100°C for an hour. The result was porous TCP with porousity of 73,7-79,30%, density of 0,65-0,83 g/cm3 and compressive strength of 1,88-2,4 Mpa. Significance level between variables can be seen from pvalue < 0,05 and lack of fit > 0,05 which show that model was corresponding toward the result. R2 obtained were Y1 = 89,68%, Y2 = 89,69%, Y3 = 89,06%. The most affecting factor significantly towards all the responses was dispersant addition that followed by starch addition and temperature rising rate of sintering. In optimum condition (dispersant addition of 8,09 gr with starch addition of 9 gr and temperature rising rate of sintering of 1°C/minute) was obtained the optimum value of response for porosity by 75,7378%, density by 0,76gr/cm3 and compressive strength 2,16 Mpa.Keywords : tricalcium phophate, yolk, porosity, density, compressive strength

Kinetika Reaksi Deasetalisasi Sintesa Kitosan Dengan Pendekatan Shrinking Core Model (SCM) Annisa Rahmat; Ahmad Fadli; Amun Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Chitosan is poly (2-amino-2-deoxy-β- (1-4) -D-glucopyranose) with molecular (C8H11NO4)n which produced from chitin of ebi waste through deacetylation process. Chitosan can be synthesized from ebi waste using chemical methods through deproteinasi, demineralization and deacetylation. Research procedure was begining with the size reduction of ebi waste into powder size. Then the powder was treated with NaOH 3.5% (deproteinasi), the ratio of deproteinasi 1:10 (w / v) for 2 hours and the stirring speed of 150 rpm. Deproteinasi product was treated with HCl 1 N (demineralization), the ratio of demineralization 1:15 (w / v) for 1 h and the stirring speed of 150 rpm. Demineralised product was reacted using 50% NaOH (deacetylation), the ratio of deacetylation 1:25 (w / v) at a speed of 100.150 stirring, and 200 rpm with a temperature of 120 ° C for 2 hours. Samples were taken every 10 minutes rise as much as 10 mL, washed until pH neutral and dried. Deacetylation degree of chitosan analyzed using acid-base titration method. By the range between in the stirring speed of 100-200 rpm it proved that the faster some mixing the bigger it is of deacetylation of chitosan is between 74,54%-83,14%. Reaction kinetics model suitable to describe the events that occur in the synthesis of chitosan was a model that was a layer 2 results (chitosan) to control.Keywords: deacetylation, reaction kinetics, chitosan, waste ebi, shrinking core model.

Ball Milling Process Of Hydroxyapatite From Sea Shells By Synthesis Method With Low Temperature Hydrothermal Rahmad Rasyidin; Ahmad Fadli; Silvia Reni Renti
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Ball milling of hydroxyapatite from sea shells has been successfully done by the low temperature hydrothermal method. The purpose of research is to determine the effect of time and number of ball mill in ball mill process to character of hydroxyapatite properties. Firstly,sea shells were calcined at 1000°C for 24 hours for producing CaO. And then 55.63 grams of (NH4)2HPO4was dissolved in 600 mL of distilled water and then 45.91 grams of CaO added into the solution until formed a slurry. Subsequently, the slurry was dried in an oven at 120°C for 15 hours. The drued slurry was then milled trough a ball milling process with variations of time of 1, 2, and 4 hours and variations in number of 10, 20, and 30 grinding balls then calcined temperature 900°C holding time of 2 hours. The results showed that the smallest diameter of the crystal at the ball mill process for 2 hours using 20 grinding balls is 67 nm. While the surface area obtained will increase if the resulting smaller size of the crystal.Keywords: Ball mill, Hydroxyapatite, Hydrothermal, Sea Shells and Crystal Diameter

Pengaruh Molaritas Dan Jumlah Pencelupan Pada Sintesis Copper-Cobalt Oksida Berbasis Nitrat Di Atas Substrat Aluminium Sebagai Solar Selective Absorber Dengan Metode Sol-Gel Dip Coating Muhammad Iqbal; Amun Amri; Ahmad Fadli
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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Key component that determining the efficiency of a solar thermal collector is a thin layer on the surface of the collector that absorbs solar radiation selectively and convert it into heat energy or commonly called solar selective absorber (SSA). Solar selective absorber can be synthesized using sol-gel dip coating method. The purpose of this research is to know the effect variation molar of copper nitrate-cobalt nitrate and number of dipping-drying cycles to absorptance copper-cobalt coating. Pieces of aluminum with size 2x4 cm were cleaned using a solution of phosphoric acid 10% wt at temperature ±50oC for 10 minutes. Sol precursor prepared by mixing copper nitrate and cobalt nitrate in ethanol and the addition of propionic acid as a catalyst and complexing agent. The mixture was stirred for 2 hours at room temperature. The coating were synthesized by varying molar percursors (ratio 1:1) 0.1M, 0.25M, 0.4M and number of dipping-drying cycles 1x, 2x, 3x, 4x, 6x, 8x and 10x, then annealed at temperature 550 oC for 1 hour. Reflektance spectra in the area of UV-Vis-NIR show that increased cycles of dipping-drying cycles (which increases the thickness of the coating) increase the value of absorptance (α), as well as the increase in the concentration of sol precursors. The results showed that the highest absorptance value found in coatings which was synthesized using mixture copper nitrate and cobalt nitrate molar variations 0.1 M at 10x cycles (dyeing and drying) with absorptance (α) = 88.69%. Further characterization showed emitance values (ε) = 12.9%. Morphological analysis showed that the surface structure of the coating was composed of nanometer-sized particles that form the porous structure. XRD analysis showed there was no change of formed crystal structure of copper oxide and cobalt oxide by increasing temperature. Adhesion test showed the adhesi between the coating and the substrate can be categorized as very strong (5B scale ASTM D 3359)Keywords : aluminum, coating, solar selective absorber and sol-gel dip coating

Kinetika Reaksi Sintesis Magnetite Menggunakan Metode Kopresipitasi Dengan Pendekatan Model Avrami Adela Shofia Addabsi; Ahmad Fadli; Komalasari Komalasari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Magnetite is a material that can be used in a drug delivery aplication. The purpose of this study is to determine the effect of temperature and stirring rate on the magnetite crystal size and determine the kinetic equation of magnetite synthesis with Avrami model approach. The magnetite was synthesized using coprecipitation method by reacting FeCl3 and FeCl2 in 2:1 mole ratio and NH4OH 10% at temperature range of 40°C, 60°C, 80°C, and a stirring rate were 300, 400, 500 rpm in a beaker. Samples were taken about 20 mL in every 5 minutes for 30 minutes. Then the sample was filtered to separate solids and filtrate. Analysis of Fe concentrations in the filtrate was using AAS, while the precipitate was washed until neutral and dried at 100°C for 2 hours. Then the magnetite powder was characterized by XRD and SEM-EDX. From the characterization we found a cubic structure of magnetite and crystals size of magnetite is about 10-12 nm formed. The morphology of the magnetite particles tended to be aglomerated but if the temperature and stirring rate increased, the aglomeration of the particles would be uniform. This synthesis of the magnetite could be approximated by the Avrami model with the core of forming function value (n) is ranging from 1.3-1.6. If the temperature and the stirring rate increased, the value of the rate constant of transformation (k) increased too. At temperature 30 °C; 300 rpm obtained the constant rate of transformation of 0.01 min-1 and 0.08 min-1 at temperature 80 °C; 500 rpm.Keywords: aglomeration, avrami, coprecipitation, drug delivery, magnetite

Adsorpsi Zat Warna Rhodamine-B Menggunakan Fly Ash Sawit Yang Dimodifikasi Dengan NaOH Sebagai Adsorben Charismayani Charismayani; Edy Saputra; Ahmad Fadli
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Rhodamine B contributes significantly to environmental pollution, because it is nonbiodegradable, toxic and harmful to the environment. One effort to reduce the amount of Rhodamine B is the adsorption process. The purpose of this study to determine the effect of adsorption temperature, pH, adsorbent mass. Knowing the optimum conditions for reducing the levels of dye in the water, as well as determine the adsorption equilibrium modelsRhodamine B using fly ash oil modified with 1.4 NaOH as an adsorbent. fly ash modification processes are done by mixing fly ash and NaOH in the ratio 1: 4. The adsorption process isconducted by mixing fly ash oil and pH solution of rhodamine B. The optimum conditions for reducing the levels of rhodamine B in water is the adsorbent mass of 5 g/L, temperature of45°C and pH 2. Thermodynamic data such as ΔH, ΔG and ΔS were calculated. And the mechanism of rhodamine B dye adsorption by fly ash oil is dominated by Freundlich isotherm models representing physical adsorption.Keyword: Adsorption, Rhodamine B, Fly Ash, Isothermal Adsorption

Sintesis Komposit Magnetit/Hidroksiapatit Menggunakan Metode Hidrotermal Dengan Variasi Waktu Dan Konsentrasi FeCl3 Bima Wandika Putra; Ahmad Fadli; Drastinawati Drastinawati
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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Magnetite / hydroxyapatite composite is a material that can be used as a drug carrier. The purpose of this study was analyzing variations in time and FeCl3 concentration on the characteristics of composites produced using the hydrothermal method. A total of 0.3248 gr FeCl3.6H2O (2 mmol or 0.05 M), sodium citrate 1.1764 gr (4 mmol or 0.10 M), and 0.3604 gr urea (6 mmol or 0.15 M) dissolved in 40 ml of distilled water, then 0.1 g of PEG (7.5 g/L) is added while stirring until it runs out, then added Hydroxyapatite powder as much as 30% by weight, stirring until it dissolves. After being put in a Teflon container. The container was put into an oven and set at 210 ° C. The reaction times used in this study were 5, 7, 9, 12 and 15 hours. Furthermore, it was carried out with the help of an external magnetic field (permanent magnet) so that the process can be carried out quickly and more effectively. Furthermore, it was settled by completion. The sample is then dried at oven temperature 120°C for 12 hours. The resulting composite powder was characterized by XRD, BET, TEM, and VSM. Increasing hydrothermal time to 15 hours at a concentration of 0.15 M, increasing the surface area of particles from 64.48 m2/gr to 67.41 m2 /gr. Where as the variation of higher FeCl3 concentration from 0.05 M to 0.15 M is the large size of magnetite crystals 18.41 nm to 22.77 nm. Variation of higher FeCl3 concentration enlarged the surface area of particles from 48.21 m2/gr to 67.41 m2/gr, increased magnetic saturation value from 13.24 emu / gr to 17.27 emu/gr, with the shape of the particles produced round shape measuring 15 nm.Keywords: composite, drug delivery, hydrothermal, hydroxyapatite, magnetite

Synthesis and Characterization Nanomagnetite by Co-precipitation Rahimah Rahimah; Ahmad Fadli; Yelmida Yelmida; Nurfajriani Nurfajriani; Zakwan Zakwan
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 2, No 2 (2019): July 2019
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v2i2.13995

Magnetite (Fe3O4) nanoparticles becomes a new innovation that gets attention of biomedicine scientists. Magnetite can be applied to cancer treatment as a drug carrier because it’s good biocompatibility and very low toxicity. The aim of this study was to determine the effect of temperature and retention time on the magnetite particle characteristics prepared by co-precipitation method. The first, FeCl3 and FeCl2 with 2:1 mole ratio were reacted with 10% NH4OH at 40 - 80°C temperatures during 1 – 30 minutes in a beaker glass. Subsequently, the precipitate was separated using filter paper and it dried into air oven at 100°C. The characteristic of obtained magnetite powder were determined using XRD and SEM. From XRD pattern indicates that magnetite formed at all temperatures with crystallite diameter in the range of 7-13 nm. The SEM results indicate the agglomeration of the magnetite particles with size in the range of 1.37 to 1.72 μm. In the other hand, the higher of temperature and retention time will make the agglomeration of the particles become more uniform. The increasing of temperature and the retention time will increase the magnetite crystallinity level.

A Pemberdayaan Santri di Rumah Amal MIS Hubbullah Pekanbaru Melalui Produksi Nugget Ikan Patin Silvia Reni Yenti; Amun Amri; Ahmad Fadli; Zultiniar Zultiniar; Sunarno Sunarno; Wisrayetti Wisrayetti
Journal of Community Engagement Research for Sustainability Vol. 1 No. 2 (2021): September
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Counseling activities and training on making catfish nuggets have been carried out for the students at the MIS Hubbullah Charity House Pekanbaru. The activity was carried out by lecturers at the Department of Chemical Engineering, FT UNRI who were assisted by students. Evaluation of activities is carried out both before and after activities are carried out. From the results of the activity evaluation, it was found that there was an increase in the understanding and ability of participants in processing catfish into fish nuggets by 94.4%. Based on a follow-up survey conducted by the service team, it was found that the students of MIS Hubbullah continued the activities of making these catfish nuggets and even made a label for the product packaging of catfish nuggets as one of their business units.

Co-Authors Abdul Rasyid Achmad Noerkhaerin Putra Ade Pratama Adela Shofia Addabsi Adha Widoni Adi Maulana Putra Adi Mulyadi Putra Adrianto Ahmad Afrila Afrila Agung Prabowo Agung Prabowo Agung Prabowo Agung Prabowo Ahmad Riadi S Hasibuan Ahmad Zaki Alfarisi, Cory Dian Allailus Syah Safara Allailus Syah Safara Alltop Amri Ya Habib Amun Amri Annisa Aprilya Putri Annisa Rahmat Ari Aditia Sukma Sukma Arisman Adnan Ariya Eka Alel Arosyidin Arosyidin Aulia Permatasari Aulia Permatasari Bahruddin Bahruddin Benny Ahmadi Bima Wandika Putra Charismayani Charismayani Damayanti, Elok Debora Tambunan Deden Saprudin Deni Astika Deni Noviana Derry Hanriansyah Pratama Deska Deska Dewi Indah Pratiwi Dhamala Shobita Chandra Dhanang Hayuningwang Dion Julio Iskandar Dovy Reyandi Drastinawati Drastinawati Drastinawati Drastinawati Dwi Yerlis Rahmi Edy Saputra Ervina Ervina Esty Octiana Sari Esty Octiana Sari Fachry Abda El Rahman Fadhil Mubarak Fajril ' Akbar Fajril Akbar Feblil Huda Ferdy Ashari Syawal Fernando Susilo Gading Bagus Mahardika Gede Indra Ludy Wirata Heni ' Ismawati Heni Ismawati Heni Sugesti Herry Novriansyah Idral Amri Ika Karina Ilham Habib Indah Fitriani Indra Purnama Indra Yasri Ines Indriyani Irdoni HS Irdoni Irdoni Iwantono Iwan Barnawi Jabosar Ronggur Hamonangan Panjaitan Jenial S Julharmito Julharmito Komalasari Komalasari Lia Yuningsih Lilis Suriani Luci Octaria M Satria Haruda Marlinda MAYANG SARI Mayangsari Mayangsari Melda Helena S Miftah Anugrah Mochamad Reizal Ath Thariq Muchlis Ade Putra Muh Irwan Muhamamad Rizky Zuriadi Muhammad Hamdani Muhammad Reski Muhammad Syafiq Izzuddin Mustika Canra Mutamima, Anisa Nisa Mulya Nissa Aqhilla Novika Sri Wardani Nuraina Siregar Nurfajriani Nurfajriani Nurfatihayati Nursyaniati Nursyaniati Nurul Afifah Ongky Alexander Ongky Alexander Padil Padil Panca Setia Utama Pancasila Putri Peter Peter Prihartini Widiyanti Putri Arini Putri Rahmadani Rahimah Rahimah Rahmad Rasyidin Rani Handayani Rathesa Najela Rawdatul Fadila Ridho Wijaya Riki Rahmadhan Rio Andika Ririn Puji Hastuti Rozanna Sri Irianty Rusydy Rusydy ' Septiana Veronika S Silvia Reni Renti Silvia Reni Yenti Silvia Reni Yenti Silvia Reni Yenti Silvia Reni Yenty Siska Priscillia Aledya Siti Chotijah Sri Murda Niati Sri Murda Niati Subkhan Maulana Suhendri Sukoco Sukoco Sukoco Sukoco Sunarno Sunarno Sunarno Sunarno Syarifuddin Oko Syelvia Renni Yenti Thomson Simanjuntak Toni Ardi Ulfah Naida Marbun Wan Elsa Novtari Adiani Wasty Rusjaya Wilda Zakiah Wiriyan Jordy Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wyda N Saragi Yelmida Azis Yelmida Aziz Yesi Afriani Yogi Yolanda Yunus Olivia Novanto Zakwan Zuchra Helwani Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar

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