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Penentuan Model Kesetimbangan Adsorpsi Ion Pb(II) Menggunakan Regenerated Spent Bleaching Earth (RSBE) Sasmitra, Dani; Yusnimar, Yusnimar; Fadli, Ahmad
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Spent bleaching earth (SBE) is a waste produced by the bleaching unit in the palm oil refinery industry. One of the efforts to tackle SBE waste is regenerated into regenerated spent bleaching earth (RSBE) which can be used as an adsorber of heavy metals in water waste such as Pb(II) from industry. This study aims to determine the characteristics of the SBE and RSBE, the adsorption equilibrium time, the adsorption capacity of the RSBE with variations in the concentration of Pb(II) ion and the adsorption temperature and determine the appropriate adsorption isotherm model. In this study, SBE was regenerated by extracting oil by soxletation at 72oC for 5 hours with n-hexane solvent, followed by washing with 3% HCl and then physically activated at 470oC for 12 hours. A total of 1 gram of RSBE was mixed with Pb(II) solution with a volume of 100 ml at various concentrations (20, 30 and 40 ppm) and adsorption temperatures (40, 50 and 60°C). The results showed that the absorption of Pb(II) ion by RSBE reaches equilibrium after 150 minutes contact time and the adsorption that occurs follows the Langmuir isotherm adsorption model with a correlation coefficient (R2) value of 0,9935 and a maximum absorbing capacity value of 4,29 mg Pb(II)/g RSBE that occurs at variations in the concentration of 40 ppm and a temperature of 60°C. Keywords: adsorption, adsorption isotherm, Pb(II) ion, RSBE, SBE.
Prarancangan Pabrik Propilen Glikol Dari Gliserol Dengan Desain Alat Utama Kolom Distilasi (D-102) Balqis, Mutiara Sri; Fadli, Ahmad
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Propylene glycol or 1,2-propanediol is an organic compound that has low toxicity so it is used as a raw material in food products, cosmetics, and medicines. Propylene glycol is used as a solvent and preservative, moisturizer, medicinal formula and viscosity stabilizer in paints.The purity of propylene glycol that meets USP (United States Pharmacopeia) standards is >99.5% The need for propylene glycol increases over time. The increase in demand for propylene glycol is projected at 5% per year based on data from the BPS (Badan Pusat Statistika) for the last 6 years. However, until now there has not been a single Indonesian company that produces propylene glycol, so domestic needs still rely on imports. The increasing need for imports will reduce the source of foreign exchange for the country. Therefore, the construction of a propylene glycol plant is indispensable. The purpose of this study is to get an overview of calculations regarding propylene glycol factories in Indonesia with the main design is a distillation column (D-102) which serves to increase the purity of propylene glycol. The type of distillation column used is the tray column with the diameter of coloumn is 21,50 inch and the height of coloumn is 425,19 inch. The operating conditions in the distillation column are temperature of 460oK and an operating pressure of 1 atm. Plant economic analysis is carried out to determine the feasibility of the factory to be built. Based on the results of the economic feasibility analysis of the factory, the propylene glycol plant is feasible to build with a 1,39-year POT, 42% BEP, 22.79% IRR, and 57% ROI.Keywords: propylene glycol, distillation, economic analysis, imports
Pengaruh Variasi Konsentrasi Asam Asetat Terhadap Hasil Sintesis Nanokitosan Dengan Metode Gelasi Ionik Dewita, Putri Aurora; Fadli, Ahmad; 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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Abstract

Industrial waste of dried shrimp shells contains chitin which can be used as raw material for chitosan synthesis. Along with the development of technology, product with using chitosan continues to be developed by physically modifying chitosan into nanochitosan so that it has a wider utilization than chitosan. This study was aimed to synthesize nanocitosan using the ionic gelation method and determine the effect of the acetic acid concentrations and sodium tripolyphosphate concentrations on the characteristics of nanochitosan. The procedure of nanochitosan synthesis by dissolved chitosan with acetic acid to obtain 0.2% chitosan solution and stirred with a magnetic stirrer. NaTPP solution with a chitosan volume ratio of NaTPP 5: 1 was added to the chitosan solution and stirred for 1 hour at a speed of 1200 rpm. Furthermore, the nanochitosan was characterized by using Particle Size Analyzer (PSA). The acetic acid concentrations used were 0.5% and 2%. The increase in acetic acid concentration (0.5% and 2%) with the constant of 0.5% NaTPP concentration causes the polydispersity index decrease (1.451 and 0.924). Keywords: acetic acid, ionic gelation, nanochitosan, sodium tripolyphosphate
Sintesis Nanokitosan Dengan Metode Gelasi Ionik Menggunakan Pelarut Asam Asetat Dengan Variasi Konsentrasi Kitosan Qonitannisa, Shofi; Fadli, Ahmad; 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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Abstract

Nanochitosan research continues to be developed using easy and simple methods. The content of chitosan in shrimp shells is used as raw material for the synthesis of nanochitosan. The purpose of this study was to determine the effect of variations in the concentration of chitosan on the size of the nanochitosan produced using the Particle Size Analyzer (PSA) analysis method. The research was carried out through several stages including preparation of raw materials, manufacturing of chitosan, preparation of nanochitosan using the ionic gelation method and characterization of nanochitosan. The procedure for making nanochitosan is to make 1% acetic acid solution and 0.1% natrium tripolyphosphate (NaTPP). Chitosan solution with a concentration of 0.1% and 0.3% was stirred using a magnetic stirrer. After 15 minutes NaTPP solution added at a volume ratio of chitosan and NaTPP was 7:1. Stirring continuously for 1 hour at 1200 rpm. Furthermore, the characterization was carried out on the nanochitosan. The deacetylation degree of chitosan from dried shrimp industrial waste in the results of this study has met the quality standard of chitosan, namely 76.3%. The results of the research that have been carried out obtained the size of chitosan nanoparticles of 852.1 nm and 2591.4 nm. The polydispersity index of each concentration results 0.353 and 0.741. The higher chitosan concentration used, the higher of nanoparticle size and the polydispersity index results. Keywords: acetic acid, degree of deacetylation, ionic gelation, nanochitosan, natrium tripolyphosphate
Prarancangan Pabrik Propilen Glikol Dari Gliserol Dengan Disain Alat Utama Reaktor Hidrogenasi Artha, Ulfa Dwi; Fadli, Ahmad
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 2 Juli s/d Desember 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Propylene glycol or 1,2-propadienol is an organic compound which has low toxicity and good formulation properties. Propylene glycol can be used as a preservative or solvent in the food industry, softener or moisturizer in the cosmetic industry, drug formulas in the pharmaceutical industry, additives that function as viscosity and color stabilizers in the paint industry, and others. Application of propylene glycol is vast, so that the demand for propylene glycol increases from year to year. However, until now, all propylene glycol needs in Indonesia still rely on imports. Therefore, it is necessary to establish a propylene glycol factory in Indonesia. The pre-design of this plant is carried out in several steps, namely collecting data sources to support the establishment of the plant, calculating mass and energy balances, calculating heat and mass exchange networks, calculating and designing hydrogenation reactors and their supporting accessories, and economic analysis. In the pre-design of this plant, a reactor was designed in the form of a hydrogenation reactor which functions as a reaction site for acetol with hydrogen gas. The type of reactor used is a fixed bed multitube reactor with a temperature of 300 ° C and a pressure of 14 bar. The hydrogenation reactor has 48 tubes, 5,0627 m high, 0,4382 m outside diameter, and uses skirt support.Keywords: Propylene glycol, glycerol, hydrogenation reactor, economic analysis
PENGARUH SUHU DAN WAKTU REAKSI TERHADAP PEMBENTUKAN NANOPARTIKEL MAGNETIT (Fe3O4) SECARA HIDROTERMAL Sari, Esty Octiana; Fadli, Ahmad; Amri, Amun
Jurnal Sains dan Teknologi Vol 18, No 1 (2019): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (22.439 KB) | DOI: 10.31258/jst.v18.n1.p8-13

Abstract

Nanopartikel magnetit (Fe3O4) merupakan nanomaterial yang atraktif karena dapat diaplikasikan secara luas dalam bidang biomedis, elektronik, lingkungan, hingga pertanian. Metode hidrotermal merupakan salah satu metode sintesis sederhana untuk mendapatkan magnetit dengan ukuran terkontrol. Penelitian ini bertujuan menentukan pengaruh suhu dan waktu reaksi terhadap pembentukan nanomagnetit pada proses hidrotermal. Magnetit disintesis dari FeCl3, urea, sitrat dan polietilena glikol (PEG) pada suhu 180, 200 dan 220oC selama 1, 2, 3, 5, 7, 9 dan 12 jam. Hasil sintesis dikarakterisasi dengan XRD, TEM dan magnetometer. Hasil karakterisasi menunjukkan bahwa semakin tinggi suhu semakin cepat reaksi pembentukan magnetit. Semakin lama waktu reaksi, menunjukkan kecenderungan pada peningkatan kristalinitas dan ukuran partikel.
MODEL KESETIMBANGAN PADA ADSORPSI ION KADMIUM MENGGUNAKAN HIDROKSIAPATIT DARI KULIT KERANG DARAH Yenti, Silvia Reni; Fadli, Ahmad; Drastinawati, Drastinawati; Zultiniar, Zultiniar; Nisa, Aidina Fahrun
Jurnal Sains dan Teknologi Vol 17, No 1 (2018): Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (22.439 KB) | DOI: 10.31258/jst.v17.n1.p9-15

Abstract

Pencemaran logam berat kadmium (Cd2+) di perairan mengakibatkan kerusakan yang besar bagi kehidupan manusia. Salah satu cara untuk menghilangkan dan mengurangi logam cadmium adalah menggunakan proses adsorpsi. Larutan kadmium (Cd2+) 3mg/L sebanyak 200 mL ditambahkan HAp 0,5 gr dan diaduk dengan kecepatan 100, 200 dan 300 rpm pada suhu 30°C, 40°C dan 50°C. Larutan kemudian dianalisa menggunakan Atomic Adsorption Spectroscopy (AAS) untuk mengetahui konsentrasi kadmium. Semakin besar suhu adsorpsi maka kapasitas penjerapan adsorben HAp (Qe) semakin kecil. Semakin besar kecepatan pengadukan adsorpsi, maka semakin besar pula kapasitas penjerapan adsorben HAp (Qe). Mekanisme adsorpsi logam kadmium (Cd2+) menggunakan HAp memiliki kecocokan dengan model isotherm Freundlich yang mewakili adsorpsi fisika dengan kapasitas panas adsorpsi (ΔH) sebesar -1,665304 kcal/mol.K dan perubahan entropi (ΔS) didapatkan sebesar 15,76 J/mol.K.
Sintesis Hidroksiapatit Dari Limbah Tulang Sapi Menggunakan Metode Presipitasi Dengan Variasi Rasio Ca/P Dan Konsentrasi H3PO4 Haris, Al; Fadli, Ahmad; Yenti, Silvia Reni
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 is a compound of calcium phosphate ceramics and also the main inorganic components in bones and teeth of animals and humans. Hydroxyapatite was synthesized from bovine bones using precipitation method. The purpose of this study is to determine the effect of the ratio of Ca / P and the concentration of H3PO4 to the characterization of hydroxyapatite made from bovine bones as raw materials using precipitation method. Bovine bones were calcined at 1000℃ to produce calcium oxide (CaO). Then CaO was dissolved into distilled water and slowly mixed with phosphoric acid (H3PO4) at a ratio of Ca/P 0.67; 1.67; 2.67 and the concentration of H3PO4 0.6 M, 0.8 M, 1.2 M and 2.4 M. Then the mixture going through aging process for 24 hours and then the precipitate was filtered. The residue was calcined and characterized by XRD, FTIR, and SEM-EDX. Hydroxyapatite with a variation of Ca/P ratio, the difference between the initial and final ratio of Ca/P tends to decrease with an increase of the initial ratio of Ca/P. Hydroxyapatite with a variation of H3PO4 concentration, the final ratio of Ca/P tends to decrease with an increase of H3PO4 concentration.Keywords: hydroxyapatite, precipitation, ratio, concentration.
Sintesis Hidroksiapatit Dari Precipitated Calcium Carbonate (PCC) Terumbu Karang Melalui Proses Presipitasi Dengan Variasi Rasio Ca/P Dan PH Mahdi, Zamratul; Azis, Yelmida; Fadli, Ahmad
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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Abstract

Hydroxyapatite is a crystalline molecule composed of phosphorus and calcium with the molecular formula Ca10 (PO4) 6 (OH) 2. Synthetic hydroxyapatite is known as one of the important implant materials because it has bioactive, biocompatible and osteoconductive properties that chemically resemble the mineral components of bones and teeth, so that it can be used as a substitute for human hard tissue. In this study hydroxyapatite synthesized from PCC coral reef using precipitation method with variations in pH (9, and 11) and Ca / P mole ratio (1.60; 1.67; 1.70; 1.77 and 1.80). The hydroxyapatite obtained was then analyzed by XRD and SEM analysis. From the results of XRD and SEM analysis obtained the best hydroxyapatite with the best crystallinity closest to standard hydroxyapatite, pH 11 Ca / P 1.60 ratio with 88.7% crystallinity and 26.9 nm crystal size Keyword: carbonation, Ca / P ratio, PCC, pH, precipitation,
Hydrocarbon-Impacted Soils Supported Mn for Organic Pollutant Oxidation Saputra, Edy; Fadli, Ahmad; Prawiranegara, Barata Aditya; Amri, Amun; Heltina, Desi; Bahri, Syaiful; Sandhyavitri, Ari; Restuhadi, Fajar; Abid, Hussein Rasool; Azhar, Muhammad Rizwan; Utama, Panca Setia
Journal of Applied Materials and Technology Vol. 4 No. 2 (2023): March 2023
Publisher : Faculty of Engineering Universitas Riau and Applied Materials and Technology Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/Jamt.4.2.90-98

Abstract

Hydrocarbon-impeded soil (HIS) is solid waste from spills or leaks during industrial activities that negatively impact the environment. This study aims to utilize HIS as catalyst support on MnO2 to degrade RhB (RhB) solution using Peroxymonosulfate (PMS) and to determine the optimum conditions for the catalyst to degrade RhB. The catalyst was synthesized by reacting HIS, calcined with KMnO4 with various catalyst supports with high and low Total contain Petroleum Hydrocarbon (TPH). The process degradation of Rhodamine Solution was carried out with various catalysts, PMS, and RhB concentrations. The catalyst was characterized using X-ray diffraction (XRD), Nitrogen gas adsorption-desorption (BET), and Scanning Electron Microscope-Energy Disperse Spectroscope (SEM-EDX). In this study,  the best catalyst performance was MnO2@H-TPH, which could activate PMS to degrade RhB with dye removal of 98% in about 180 min, at conditions 10 g/L RhB, 0.1 g/L catalyst, and 3 g/L PMS with the activation energy of 16.3 kJ/mol.
Co-Authors A. Amin, Siti Fuadillah Abdul Kohar Abid, Hussein Rasool Abidin, Rafi Zainal Abidin, Saenal Ade Susanto Pasaribu Aep Saefullah Agung Edi Rustanto Agung Prabowo Alfarisi, Cory Dian Alfarizi, Cory Dian Ali Syahbana Alimin, Erina Alsyakir, Hilman Zaid Amal, Citra Amalia Ambtenarie Jessica Sihombing, Ambtenarie Jessica Amin Hou Amri, Idral Amun Amri Andi Rosdianti Razak, Andi Rosdianti Anita Anita Anwar, Jufan Afnani Aprilia, Rahmi Arda, Devid Putra Ari Sandhyavitri Artha, Ulfa Dwi Aswat, Hijrawatil Azhar, Muhammad Rizwan Badriyah Bahruddin Bahruddin Balqis, Mutiara Sri Barus, Surya Danta Alberto Barus, Yohana Dwi Nita Basri, Muhammad Ridhwan Bhastary, Manda Bhastary, Manda Dwipayahi Cahyani, Dyah Ayu Chatarina Umbul Wahyuni Damayanti, Elok Debora Tambunan Deni Noviana Denny Satria Deny Setiawan Desi Heltina Dewita, Putri Aurora Dona Pasaribu Drastinawati Drastinawati, Drastinawati Effendi, Ihsan Eky Prasetya Pertiwi Elvira Sitna Hajar Encep Sopandi Evevndi, Zulfan Fachry Abda El Rahman Fahri Fahri Fajar Restuhadi Fajril Akbar Faradila, Harfiah Farida, Kania Fawaid, Yazidul Fazly, Erwin Fifiyana, Rahma Fitria, Anisa Fuad Gagarin Siregar Ginting, Rahelina Ginting, Rudimanta Habib, Alltop Amri Ya Hakim, Zulman Handrianus Pranatawijaya , Viktor Hara Novarisa Nanda Haria Saputri Haris, Al Hariz, Abdul Hasan Basri Hazzamy, Muhammad Asyaf Hendra Candra Hendra Saputra Ianatuz Zahro Ida Zahrina Idrus, Irnawaty intan permata sari Irdoni Irdoni Irmayanti Irmayanti, Irmayanti Ismawati, Heni Jayaun, Jayaun Joned C. Saksana Juliana Nasution Juliansyah, Roni Komalasari Komalasari Kosasih, Hengky Lesmana, Sata limbong, Theodorus LUBIS, ADELINA Lubis, Apriadi Mahdi, Zamratul Maihendra, Maihendra Manda Dwipayani Bhastary Manik, Dio Edward Pahala Marliyah, Marliyah Martin Martin Masria Masria Masruroh, Nikmatul Maya C.P, Helda Mega Milda Milda, Milda Moh. Tahang Muchtar, Rizki Sari Utami Muhammad Syarif, Muhammad Muhammad Tahir Muhara, Ikhbal Muharni, Sri Mutamima, Anisa Nasib Nasril, Nasril Nasution, Juliana Neila Aisha Nisa, Aidina Fahrun Nur Fadhilah Ahmad Hasibuan Nurbaeti, Kharisma Nurdin Nurfatihayati Nurwijayanti Paokuma, Hasbibi pertiwi, Megawati Dwi Pratama, Teddy Prawiranegara, Barata Aditya Prihartini Widiyanti Priskila, Ressa Purnama, Indra Putra, Alfian Cahya Putra, Devid Putri Husni Hidayah, Putri Husni Qardhawi, Muhammad Ali Yusuf Al Qayyim, Syahmi Izzan Qonitannisa, Shofi Rahmadona, Tania Ramadani Pardian Ramadhan, Muhammad Reza Ramadhani, Kurniawan Ramayanti, Putri Noor Rifaldi, Muhammad Rina Puspitasari Rombouw, Sahrul Safitrih, Dina Ayu Salqaura, Siti Alhamra Saputra, Fakhri Saragih, Andreas Sari, Ekha Rosmitha Sari, Esty Octiana Sasmitra, Dani Septiana Veronika s, Septiana Veronika Setiawan Setiawan Shahrin, Attori Alfi Silalahi, Yunita Magdalena Silvia Reni Yenti Siregar, Fuad Siti Chotijah, Siti Siti Nurhaliza Sitti Aliyah Azzahra Sitti Husaebah Pattah Solly Aryza Solpa, Wulan Putri Maheka Sri Helianty Subagiyo Subagiyo Sugina, Sugina Suharti, Eni Suhendri Suhendri Sukraini, Sukraini SUNARNO Sunarno Sunarno Surya Kencana, Dadang Suryani, Ade Erfina Susanto Susanto Sutariyono, Sutariyono SYAIFUL BAHRI Syarif Hidayatullah Syukur Berkat Waruwu Tafsiruddin, M. Taufiq, Raihan Tjiwijdjaja, Halim Tony Tony Honkley Touku Umar Ujang Kusnaedi Upe , Rachman Utama, Panca Setia Vivi Asfianti Wan Elsa Novtari Adiani, Wan Elsa Novtari WICAKSONO, ADI Widayatsari, Any Wijaya, Ridho Wisrayetti, Wisrayetti Yandi Asmana Yelmida Azis Yuanda, Dedi Yusnimar Sahan Yusri, Andi Zarkasi, Shoumi Zatira, Dhea Zubair Arza Zuchra Helwani, Zuchra Zulkarnain, Nizar Zultiniar, Zultiniar