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All Journal Jurnal Sains dan Teknologi Jurnal Sains Materi Indonesia Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Untirta Civic Education Journal Jurnal Sains dan Teknologi: Jurnal Keilmuan dan Aplikasi Teknologi Industri Jurnal Pengabdian Magister Pendidikan IPA Jurnal Abdi Ilmu Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya GANDRUNG: Jurnal Pengabdian Kepada Masyarakat Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences International Journal Of Science, Technology & Management (IJSTM) Journal of Bioprocess Chemical and Environmental Engineering Science Abdimas Awang Long: Jurnal Pengabdian dan Pemberdayaan Masyarakat Journal of Social Empowerment Gemilang: Jurnal Manajemen dan Akuntansi Optimal: Jurnal Ekonomi dan Manajemen Smart Techno (Smart Technology, Informatic and Technopreneurship) Biner : Jurnal Ilmu Komputer, Teknik dan Multimedia AMMA : Jurnal Pengabdian Masyarakat International Journal of Economic Research and Financial Accounting Anggaran: Jurnal Publikasi Ekonomi dan Akuntansi Journal of Business Integration Competitive Jurnal Mahkota Bisnis Proceeding of The International Conference on Social Sciences and Humanities Innovation Proceeding of The International Conference on Management, Entrepreneurship, and Business
Ahmad Fadli
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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
Kinetika Adsorpsi Ion Logam Cu2+ Menggunakan Tricalciumphosphate Sebagai Adsorben Dengan Variasi Kecepatan Pengadukan Dan Temperatur Mustika Canra; Ahmad Fadli; Komalasari Komalasari
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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One of the heavy metals can pollute the waters is metal ions Cu2+. The purposes of this research are to observe the effect of stirring rate and temperature on the adsorption of metal ions Cu2+ using adsorbents tricalciumphsphate (TCP) and determine a suitable adsorption kinetics model. The procedure was begun by adding 1 gram of TCP into Cu2+ solution with a concentration of 3 ppm at stirring speed of 100 rpm, 200 rpm, and 300 rpm and a temperature of 30oC, 40oC, and 50oC. Samples were taken every 2 minutes, filtered and analyzed by atomic absorption spectrophotometer (AAS). The result demonstrated that the suitable kinetic model for adsorption of metal ions Cu2+ using TCP adsorbent is pseudosecond order kinetic model with adsorption kinetics constant value of 3,125 g/mg.min. The increased the stirring rate and temperature increase adsorption rat . Type of this adsorption is physics adsorption with activation energy value of 25,016 kJ / mol.Keywords: Adsorption kinetics model, the metal ion Cu2+, tricalciumphosphate, stirring rate and temperature.
Kinetika Adsorpsi Pada Penjerapan Ion TImbal (Pb+2) Terlarut Dalam Air Menggunakan Partikel Tricalcium Phosphate Indah Fitriani; Ahmad Fadli; 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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One of the heavy metals can pollute the waters is metal ion of Pb2+. Concentration of ions Pb2+ can be removed by adsorption method. The purposes of this research are to observe the effect of stirring rate and concentration on the adsorption of metal ions Pb2+ using adsorbents tricalciumphsphate (TCP) and determine a suitable adsorption kinetics model. Pb2+ solution (2,736 mg / L, 8,546 mg / L and 14,619 mg / L) of 500 mL were added 1 g of TCP in a glass beaker while stirred with variation of rate (100 rpm, 200 rpm and 300 rpm) at a temperature of 30oC. Pb2+ solution was taken at a certain time, then the solution filtered and analyzed by atomic absorption spectrophotometer (AAS). The result showed that rate of adsorption increased with concentration of adsorbat and stirring rate. Minimum constant value of adsorption kinetic was 0,865 g/mg.min obtained at adsorbate concentration of 2,736 mg/L and stirring rate of 100 rpm. Whereas maximum value of adsorption kinetics constant 3.045 g / mg.min obtained at a concentration 14.619 mg / L stirring rate 300 rpm.Key words : Kinetic, Adsorption, Timbale, Tricalcium phosphate
Coating Scaffold Hidroksiapatit Dengan Kitosan Menggunakan Metode DIP - Coating Arosyidin Arosyidin; Ahmad Fadli; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Bone implants are a tissue replacement technique using synthetic materials that are compatible with body tissues. Materials that can be used as a bone implant one of them is hydroxyapatite scaffold (HA). However, most of the HA scaffolds still have one of the strongest compression values. To increase the compressive strength of the scaffold it must be coated with other polymers. One of the polymers that is biodegradable with the body is chitosan. HA scaffold coating method using dip - coating method by dissolving chitosan powder into acetic acid concentration 0,50%; 0.75% and 1.00% (w / v). Next, scaffold HA in coating with chitosan solution for 30, 45, 60 minutes. After coating, HA scaffold is dried at room temperature for 24 hours. The increase of chitosan concentration 0,50% to 0,75% can decrease the porosity that is 78% to 76% and pore size from 28,25 μm become 22,88 μm. Furthermore, the longer coating time required 30 minutes and 60 minutes then the greater the compressive strength of HA scaffold produced is 1.43 MPa to 4.05 MPa. The optimum condition of the operation is 0.75% chitosan concentration and 60 minutes coating time with a compressive strength value of 4.05 MPa.Keywords: chitosan, coating, compressive strength, hydroxyapatite, scaffold
Pengaruh Rasio Ca/P Dan pH Pada Sintesa Hidroksiapatit Dari Kulit Kerang Darah Dengan Metode Hidrotermal Suhu Rendah Pancasila Putri; Ahmad Fadli; Fajril Akbar
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 widely used types of biomaterials for bone implants, surgery hard tissue and bone regeneration. The purpose of this research was to determine the effect of Ca/Pratio and pH on the synthesis of hydroxyapatite from sea shells with a low temperature hydrothermal method. CaO powder produced through calcination process of sea shells at atemperature of 1000°C for 24 hours. Then CaO powder as much as 45.91 grams dissolved in 600 ml of water and NH4H2PO4 added with ratio Ca/P 0.67, 1.67 and 2.67 and pH adjusted with variation 4, 6 and 9, then heated at 90°C until form a pasta. The pasta is then dried in the oven at 120°C and calcined at a temperature of 900°C for 1 hour. The results showed that increasing the ratio Ca/P and pH causes the diameter of HA crystals formed smaller with diameter at ratio Ca/P 2,67 and pH 9 was 52,32 nm. FTIR analysis showed peaks of PO4 3- and OH- that means the hydroxyapatite is formed. HA at ratio Ca/P 2,67 and pH 9 had the biggest %yield that was 77,73%.Keywords: Hydrothermal, Hydroxyapatite, Sea shells.
Pengaruh Salinitas KCl & NaCl Terhadap Kestabilan Emulsi Minyak Mentah–Air Di Lapangan Bekasap, PT. Chevron Pacific Indonesia Dhanang Hayuningwang; Ahmad Fadli; Fajril Akbar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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In the oil well drilling and service process, NaCl and KCl used to provide hydrostatic pressure into the bowels of the earth. Brine solution unintentionally produced to the surface facility when oil lifting process perform and induce thickness of oil-water emulsion at separation tank. The objective of this study was to determine the effect of NaCl and KCl on the oil-water demulsification process at Bekasap field area, PT CPI Duri. This study was conducted by varying salinity of NaCl and KCl by 10%, 20%, 30% and 40% in 100ml oil-water emulsion sample with oil and water ratio 1:1. Demulsification of emulsion sample using precipitation method for 240 minutes, at temperature 60oC and recording increasing the number of free water every 20 minutes. The data obtained from study showed in the graphs indicate that emulsion separation speed tends to be slower due to increase of salt salinity. From the final result after 240 minutes of precipitation shown that emulsion separation process which influenced by NaCl salt is more difficult than the effect of KCl salt.Key words: Brine, Emulsion, Oil, Water,
Sintesis Nanokitosan Dengan Metode Gelasi Ionik Menggunakan Pelarut Asam Formiat Dengan Variasi Rasio Volume Kitosan Dan Natrium Tripolifosfat Aulia Permatasari; Ahmad Fadli; Sunarno Sunarno
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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Nanochitosan is a physical modification of chitosan by reducing the size of chitosan to nano size. The purpose of this research was to determine the effect of variations in volume ratio between chitosan solution and tripolyphosphate solution and to determine the characteristic of nanochitosan with Particle Size Analyzer (PSA) analysis methods. The first step for making nanochitosan is to make a 1% formic acid solution and 0.1% trypolyphosphate solution. After that, make 0.3% chitosan solutions and then stir it using magnetic stirrer. After 15 minutes, trypolyphosphate solution at a volume ratio between chitosan and trypoliphosphate each 3:1 and 7:1 are added slowly to the chitosan solution. Stirring continues for up to 1 hour with a stirring speed of 1200 rpm. The last one is the characterization of nanochitosan. Chitosan from dried shrimp industrial waste has a degree of deacetylation that matches the chitosan quality standard, which is 76%. The particle size from this research were 2639.5 nm and 2882.0 nm. From this research, the particle size and index polydispersity value were increased when the ratio between chitosan solution and tryppoliphosphate increased. Keywords: formic acid, deacetylation degree, ionic gelation, nanocitosan, trypolyphosphate
Pengaruh Suhu Reaksi Dan Kecepatan Pengadukan Pada Sintesa Hidroksiapatit Dari Kulit Kerang Darah (Anadara Granosa) Dengan Metode Hidrotermal Suhu Rendah Dewi Indah Pratiwi; Ahmad Fadli; Zultiniar Zultiniar
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 (HA) is a ceramic material that widely used for bone implants as biocompatible and bioactive properties. Sea shells can be used as a source of calcium to produce hydroxyapatite. The purpose of this research was to determine the effect of rate stirrer and the reaction temperature on the synthesis of hydroxyapatite from sea shells with a low temperature hydrothermal method. The procedure was started with calcining sea shells into CaO at a temperature of 1000oC for 24 hours. Then 55.63 g of NH4H2PO4 was dissolved in 600 mL of water and 45.91 g of CaO was added into the solution at temperature variation of 70°C, 80oC, 90oC and stirring rate of 200 rpm, 250 rpm, 300 rpm until it forms a paste. The paste was dried in an oven at 120oC for 15 hours. Then the dried paste was crushed and calcined at a temperature of 900oC for 1 hour. The results showed that the size of hydroxyapatite crystals at 70°C is 63.43 nm, while the crystal with the size of 52.48 nm obtained when the temperature was increased to 90oC. The rate of stirrer of 200 rpm, the crystal with the size of 62.92 nm obtained, it decrease to 52.48 nm when the stirring rate increased 300 rpm. FTIR analysis showed that the hydroxyapatite is formed at the calcination temperature of 900°C. HA at a reaction temperature of 90oC with the stirring rate of 300 rpm to meet the standards as a bone filler (bone filler) synthetic.  Keywords: Crystallinity, Hydrothermal, Hydroxyapatite and Sea Shells
Model Kesetimbangan Pada Adsorbsi Ion Zn2+ Menggunakan Partikel Tricalcium Phosphate Sebagai Adsorben Dovy Reyandi; Ahmad Fadli; 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

Zinc metal pollution (Zn2+) can result in negative impacts on people's life. One effort to reduce the content of zinc metal that is the adsorption process. The objective of this research is to study the effect of temperature and string rate as well as determination of equilibrium model in the zinc ion adsorption using tricalcium phosphate (TCP) as the adsorbent. Zinc (Zn+2) solution with 3 mg/l was added with 1 g of TCP in a glass beaker with stirring rate of 100 rpm, 200 rpm, and 300 rpm at temperature 30°C, 40°C and 50°C. Zinc concentration in the liquid was analyzed using AAS. The adsorption temperature decreased when the adsorption capacity of TCP (Qe) increased. The calculation result of absorption capacity (Qe) at stirring rate of adsorption 100 rpm at temperature of adsorption 30°C, 40°C and 50°C were Qe 1.0133 mg/g, 0.9598 mg/g and 0.8771 mg/g respectively. The adsorption capacity (Qe) of adsorbent TCP increased as stirring rate adsorption increased. The adsorption capacity (Qe) of zinc at temperature adsorption 30°C for stirring rate of 300 rpm, 200 rpm, and 100 rpm were 1.3702 mg/g, 1.3426 mg/g, and 1.3047 mg/g respectively. Adsorption mechanism of zinc (Zn2+) with TCP is suitable with Freundlich isotherm model.Keywords: adsorption, zinc (Zn2+), equilibrium model, tricalcium phosphate
Kinetika Reaksi Sintesis Hidroksiapatit Dari Tulang Sapi Dengan Metode Presipitasi Deni Astika; Ahmad Fadli; Silvia Reni Yenty
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 is one of kind bioceramics that can be use for implant in human body. Bioceramics hydroxyapatite was synthesized from bovine bones by using precipitation method. The purpose of this research was to determine the influence of temperature reaction to reduction concentration of calcium hydroxide and then to determine the kinetics reaction of synthesis hydroxiapatite from bovine bones by using precipitation method. Bovine bones was calcined at temperatures 1000℃ to produce calcium oxide (CaO). CaO was dissolved to distilled water and was mixed gently in to phosphoric acid (H3PO4) and then was heated. Then the filtrate tested by using complexometry to gain the concentration of calcium hydroxide. The result of kinetics reaction in synthesis hydroxiapatite from bovine bones by using precipitation method can by approaching to pseudo first order equations and pseudo second order. The reaction rate constants by using variation temperature can be approximated by using Arrhenius equation by value obtained are :k = 82,43e- (25382.64 / RT)Keywords : hydroxyapatite, precipitation, reaction kinetics, pseudo first order
Co-Authors Abdul Kohar Abdul Malik K.A Abdul Rasyid Achmad Noerkhaerin Putra Adam Samsudin Noor Ade Pratama Adela Shofia Addabsi Adha Widoni Adi Maulana Putra Adi Mulyadi Putra Adrianto Ahmad Aep Saefullah Afrila Afrila Agung Prabowo Agung Prabowo Agus Susanto Agya Mutia Alifta Ahmad Aguswin Ahmad Fadhil Nugroho Ahmad Riadi S Hasibuan Ahmad Zaki Akhmad Akhmad Akhmad Akromusyuhada Alfarisi, Cory Dian Allailus Syah Safara Aman aman Amun Amri Andi Risfan Rizaldi Annisa Aprilya Putri Annisa Rahmat Ap’aluddin Ari Aditia Sukma Sukma Arifin Setiabudi Arisky Rahmatulloh Arosyidin Arosyidin Aulia Permatasari Bahruddin Benny Ahmadi Bima Wandika Putra Cahyo Dwi Rachmadi Calvin Prasetyo Chaniago, Sabaruddin Charismayani Charismayani Chorina Ika Ristanti Damayanti, Elok Debora Tambunan Deni Astika Derry Hanriansyah Pratama Deska Deska Devia Febrina Dewi Indah Pratiwi Dewi Rafiah Pakpahan Dhamala Shobita Chandra Dhanang Hayuningwang Dingot Hamonangan Sitanggang Dion Julio Iskandar Dovy Reyandi Drastinawati Drastinawati Dwi Yerlis Rahmi Edy Saputra Effendi, Ihsan Elvira Sitna Hajar Emizatul Aini Ervina Ervina Esty Octiana Sari Fadhil Mubarak Fajril Akbar Fernando Susilo Fisy Amalia Gading Bagus Mahardika Gede Indra Ludy Wirata Gunawan Atmaja Halim Wijaya Heni Sugesti Herry Novriansyah I Wayan Sudiarta Idral Amri Ika Agustina Ika Karina Ika Puspa Satriany Ilham Habib Indah Fitriani Indra Yasri Indrawan Indrawan Ines Indriyani Irdoni HS Irdoni Irdoni Irwan Ahussalim Jabosar Ronggur Hamonangan Panjaitan Jannatin Ardhuha Jayaun Jayaun Jenial S Jenni Kristina Br Panjaitan Jessica Andre Julharmito Julharmito Junaidi Junaidi Kania Farida Komalasari Komalasari LALU RUDYAT TELLY SAVALAS Lathifah Cahyani P3 Lia Yuningsih Lilis Suriani Luci Octaria M Satria Haruda M. Ferdinansyah M. Zamroni Mahendra Aswit Sandra Barata Manda Dwipayani Bhastary Marlinda Martin Maya Andiriani MAYANG SARI Mega Safana Mega Sanjaya Melda Helena S Miftah Anugrah Mochamad Reizal Ath Thariq Moh. Tahang Mona Lisa Muchlis Ade Putra Muh Irwan Muhamad Hendri Diarta Muhamamad Rizky Zuriadi Muhammad Hamdani Mustika Canra MUTIARANI MUTIARANI Nanda Nabila Maharani Nasib Nisa Mulya Nissa Aqhilla Novika Sri Wardani Novirsari, Emma Nuraina Siregar Nurjamilah Nursyaniati Nursyaniati Nurul Afifah Ongky Alexander Opik Hidayat Abdul Latif Padil Pancasila Putri Peter Peter Puji Rahayu Purnama Sari Putri Arini Putri Julia Maemum Putri Rahmadani Rahmad Rasyidin Ramadani Pardian Ramadhana Eka Rani Handayani Rathesa Najela Ratih Amelia Rawdatul Fadila Reny Novianti Ridho Hafizh Maulana Ridho Wijaya Riki Rahmadhan Riko Ervil Rio Andika Rizky Gimnastiar Robin Roni Juliansyah Rozanna Sri Irianty Rusydy ' Sai Vinodhini Samsoni Samsoni Septiana Veronika S Septianing Tyas K Silvia Reni Renti Silvia Reni Yenti Silvia Reni Yenty Sintia Siska Priscillia Aledya Siti Chotijah Siti Nurkhaliza Sri Murda Niati Subkhan Maulana Sunarno Sunarno Syarifuddin Oko Syelvia Renni Yenti Thomson Simanjuntak Thufail Mujaddid Al-Qoyim Tina Linda Toni Ardi Ulfa Dwiyanti Ulfah Naida Marbun Wan Elsa Novtari Adiani Wasty Rusjaya Wilda Zakiah Wiriyan Jordy Wyda N Saragi Yelmida Azis Yesi Afriani Yopy Ratna Dewanti Yuli S Yunus Olivia Novanto Zubair Arza Zuchra Helwani Zulkarnain Lubis Zultiniar Zultiniar