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All Journal Jurnal Sains dan Teknologi Komunikasi Fisika Indonesia Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Riset Kimia Jurnal Ilmiah Biosaintropis (Bioscience-Tropic) Jurnal Ilmiah Pertanian Science and Technology Indonesia Martabe : Jurnal Pengabdian Kepada Masyarakat Stannum : Jurnal Sains dan Terapan Kimia Jurnal Pengabdian Masyarakat Teknik Indonesian Journal of Chemical Science and Technology Journal of Applied Materials and Technology Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Journal of Bioprocess Chemical and Environmental Engineering Science Jurnal Abdi Masyarakat Indonesia Journal of Community Engagement Research for Sustainability Jurnal Sains Materi Indonesia JURNAL REKAYASA KIMIA & LINGKUNGAN
Yelmida Azis
Department Of Chemical Engineering, Faculty Of Engineering, Universitas Riau
Agriculture, Biological Sciences & Forestry Arts 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 Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Isotherm Dan Kinetika Adsorpsi Logam CU Menggunakan Adsorben Serbuk Kulit Udang Dengan Variasi Konsentrasi Adsorbat Dan pH Larutan M. Rafi Yunanda; Yelmida A; Sri Rezeki Muria
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

Adsorption is a process in which solute liquids accumulate on the adsorbent surface and form a thin layer of atoms or molecules. The adsorbent used was shrimp shell powder. Utilization of the adsorptionprocess in the absorption of Cu metal is useful for determining the isotherm model and adsorption kinetics. In this study the adsorption process was carried out by varying the concentration of adsorbate(10, 20 and 30 ppm) and the pH of the Cu metal solution (5, 7 and 9) at room temperature. The largest adsorption capacity occurred at the adsorption pH of 5 and the initial solution concentration of 10 ppmwith an adsorption capacity value of 88.28%. The isotherm model of the Cu metal adsorption process follows the Harkins Jura isotherm equation with R2 value of 0.9990. The kinetics of the Cu adsorptionprocess followed the Elovich kinetics model with a value of R2 0.9914 and a constant adsorption rate of 0.631 at an adsorbate concentration of 10 ppm and a pH of 7 Cu metal solution.Keywords : Adsorbent, Adsorption, Isotherm, Kinetics, pH
Perengkahan Katalitik PalmFatty Acid Distillate (PFAD) Menghasilkan Biofuel Menggunakan Katalis Abu Tandan Kosong Sawit (TKS) Dengan Variasi Temperatur Dan Kecepatan Pengadukan Sri Hidayanti; Yelmida Yelmida; 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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Abstract

Ash of empty palm fruit bunches is the solid waste from process of making crude palm oil (CPO). Ash of empty palm fruit bunches have many component that make it can to be use as a catalyst. Palm fatty acid distillate (PFAD) is a byproduct from process of making cooking oil. PFAD potential to converted into biofuel with catalytic cracking process.  This study aims to utilize ash of empty fruit bunches and PFAD to be raw material of making biofuel, to know component of biofuel produced. Yield maximum biofuel obtained at a temperature of 410 0 C with  stirring speed 250 rpm that is equal to 57,14%. While the largest biofuel conversion obtained at stirring speed of 300 rpm and a temperature of 4100C in the amount of 50.671%.   Cracking results analyzed by GCMS and found the biofue produced more dominant is a constituent of gasoline fuel .  Keywords: Ash of empty palm fruit bunches, Biofuel, Catalytic Cracking, PFAD
Adsorpsi Zat Warna Rhodamin B Menggunakan Karbon Aktif Dari Tandan Kosong Kelapa Sawit (Elaeis Guneensis Jacq) Utami Utami; Shinta Elystia; Yelmida Aziz
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Textile industry is one of the most dominant developed industries in Indonesia. Waste textile industries were dominated by dyes pollution from the production process. One way to pigment used in textile industry is pigment Rhodamin B. Methodt reduce dyes waste pollution is through adsorption. The adsorbent that used was activated carbon from waste palm empty fruit buncheswhich are activation physics in temperature 300oC and chemical activation is done by using H3PO4 activator. This research aims to study the activated carbon capabilities in adsorption Rhodamin B in the variation of the mass of adsorbent 1, 3 and 5 grams, sieve size 0,595-250 mm, 0,250-125 mm and 0,105 mm and a contact time of 15, 30, 45 and 60 minutes.The results showed that the optimum occurs at mass 5 grams, sieve size 0,105 mm and a contact time of 45 minutes with an efficiency of 99,50%. While the lowest efficiency is 27% to mass 5 grams, particle size 0,595-0,250 mm and a contact time 15 minutes.Keywords: Adsorption, Activated carbon palm empty fruit bunches, Adsorbent mass, Sieve size , Contact time, Rhodamin B
Isoterm Dan Termodinamika Adsorpsi Pada Methylene Blue Menggunakan Hidroksiapatit Dian Novita Rahmawaty; Yelmida Azis; Cory Dian Alfarisi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The adsorption model was carried out to find out the appropriate adsorption mechanism in the methylene blue adsorption process using hydroxyapatite. The aim of this study was todetermine the equilibrium time, the effects of methylene blue’s initial concentration, adsorption temperatures and the adsorption models. Analysis was conducted by spectrophotometric method, then tested on the Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (DRK) isotherm model. The result showed that the best initial concentration of methylene blue for adsorption temperature 30℃ with adsorption capacity 2,090 mg/g and 41,79% of removal efficiency. The adsorption followed the Freundlich isotherm model. Thethermodynamic parameters (ΔH = -8,4 kJ/mol, ΔG < 0 dan ΔS = -80,70 J/mol K) indicated that he adsorption process was a physically and spontaneously excothermic reaction.Keywords: adsorption, Freundlich, hydroxyapatite, isotherm, methylene blue.
Sintesis Hidroksiapatit Melalui Precipitated Calcium Carbonate (PCC) Kulit Kerang Darah Dengan Metode Hidrotermal Jefry Soclin Sianipar; Yelmida Azis; 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

Hydroxyapatite Ca10(PO4)6(OH)2 is a calcium phosphate compound which is bioactive ceramic material with high bioafinitas and the principal inorganic constituent of bones and teeth. Hydroxyapatite (HAp) materials used as bone implants, adsorbents and catalysts. In this research 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. PCC blood calm shell which has calcium source was synthesized to HAp by hydrothermal process with varied rasio Ca/P (1.61, 1.67, and 1.73) and reaction temperature (140oC, 160oC, 180oC, and 200°C). HAp synthesized result has been analyzed using X-ray Diffraction (XRD), scanning electron microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The results of FTIR analysis, synthesis of HAp with hydrothermal method through precipitated calcium carbonat (PCC) showed the formation of hydroxyapatite in the presence of peaks PO43- dan OH-. The highest peak is obtained at ratio Ca/P 1.61 at reaction temperature of, 140°C, 160°C, 180°C, and 200°C. XRD diffraction results in hydroxyapatite get the highest purity obtained at ratio Ca/P of 1.61 at temperature of 180°C with a hexagonal crystal structure. The results of SEM-EDX analysis, show that the morphological form of agglomerates or clumping . The molar ratio of Ca/P of hydroxyapatite which is made from sea shells seashell waste through the PCC is 1,77.Keywords : PCC Blood Calm Shell, pH, Temperature, Hydroxyapatite, Hydrothermal Method.
Pengaruh Massa Adssorben Terhadap Adsorpsi Pergasol Red Dengan Proses Batch Menggunakan Cangkang Kulit Telur Terkalsinasi Sanredina Sanredina; Rozanna Sri Irianty; Yelmida Yelmida
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Waste dye untreated directly discharged into the environment and society can result in negative impacts on people's lives. One effort to reduce the content of azo dyes in solution Pergasol Red namely the adsorption process. The purpose of this study to determine the effect of mass adsorption at adsorption Pergasol Red uses powdered eggshells calcined. Pergasol Red 60 ppm solution of 200 mL added with a trowel powdered eggs with a variety of mass 1 g and 2 grdidalam erlenmeyer stirred with a speed of 200 rpm 40 ° C. Then the solution was analyzed using a UV-VIS spectrophotometer to determine the final concentration Pergasol Red after absorption. The more the number of egg shell powder mass concentration Pergasol Red adsorbed higher. A mass of 1 g and 2 g Pergasol Red adsorbed concentration as much as 56.3 ppm and 57.6 ppm with the effectiveness of the absorption of 96.1%. Keywords: adsorption, skin powdered eggs, Pergasol Red,
Pembuatan Biodiesel Dari Sawit Off-Grade Dengan Proses Dua Tahap Rahmawati Rahmawati; Zuchra Helwani; Yelmida A
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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Abstract

Off-grade palm oil is a source of untapped vegetable oil. Off-grade palm oil can be used as an alternative raw material for biodiesel production despite having high content Free Fatty Acid (> 5%). Plant with a capacity of 30 tones of FFB yield 7-10% off-grade palm oil or 2-3 tons per hour. The catalyst used is potassium hydroxide because it has smaller ionization energy, making it faster to form a product when used as a catalyst. This research aims to produce biodiesel from low-quality raw materials and determine the effectiveness of the process by looking at the effect of process conditions such as reaction temperature, molar ratio and catalyst concentration on the yield of biodiesel. The biodiesel making process was carried out with two stages of the reaction, esterification and transesterification reactions due to high content of free fatty acid in the raw material. Data processing in this study was analyzed by response surface methodology (RSM) using Design Expert 8.0 program. Experiment runs were determined by central composite design (CCD), which consists of three variables, namely temperature, catalyst concentration and molar ratio of methanol to oil. The highest biodiesel yield was 88.56% (%wt) obtained under the conditions of reaction temperature 60 °C, the molar ratio of methanol to oil 8:1 and the concentration of 1% KOH base catalyst. The characteristics of biodiesel produced in the form of density, kinematic viscosity, acid number and flash point are in accordance with the standards of Indonesian biodiesel. Catalyst concentration have a significant influence on the yield of biodiesel.Keyword : off-grade palm oil, biodiesel, base catalyst, esterification and transesterification
Pemanfaatan Precipitated Calsium Carbonate (PCC) Dari Limbah Cangkang Kerang Darah (Anadara Granosa) Sebagai Adsorben Pengolahan Air Gambut Dini Aulia Sari Ermal; Shinta Elystia; Yelmida Aziz
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
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Abstract

Peat water is surface water which has a dark brown to black, has a very high organic content, and acidic. There are negative effects if used directly and continuously without processing. This is because in the peat water was found humic acidcompound that makes the peat water has these characteristics. One effort to decrease the concentration of humic acid is through adsorption method. The adsorbent that usded was precipitated Calisum Carbonate (PCC) which originate from waste shellsblood.Variable that was given in this research consisted by mass variation PCC 1, 3, 5, and 7, the stirring speed of 50, 100, and 150 rpm and a contact time of 15, 30, 45 and 60 minutes. The maximum state was reached on the mass of PCC 5 grams, stirring speed of 150 rpm, and a contact time of 30 minutes with the adsorption efficiency of 99.86% . Decreasing concentration of adsorption of organic substances (humic acid) of 1450 mg / L to 2,07 mg / L. From this research PCC is able to adsorborganic substances (humic acid) so that the results that was obtained accordingly with some parameters PERMENKES 416 / Menkes / PER / IX / 1990.Keywords: Adsorptiodn, Peat Water, Shells of mussels blood, PCC
Pengaruh Waktu Reaksi pada Sintesis Hidroksiapatit Dari Precipitated Calcium Carbonate (PCC) Terumbu Karang Melalui Proses Hidrotermal Dani Pradana; Yelmida Azis; 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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Abstract

Coral reefs in Indonesia have a good predicate of around 65%, while damaged coral reefs are around 35%. The damaged coral reefs have not been used optimally, whereas coral reefs have a high content of calcium carbonate which is as much as 78.81%, so that damaged coral reefs can be used as raw material for the synthesis of Hydroxyapatite (HAp). Hydroxyapatite is a bioceramics that can be used as a bone and dental grafting material, catalyst or adsorbent. This study aims to synthesize hydroxyapatite through the formation of Precipitated Calcium Carbonate (PCC) from coral reefs. The research procedure begins with the coral reefs calcination process to form CaO which is then made into PCC with the carbonation method. PCC as a source of calcium was synthesized into hydroxyapatite using a hydrothermal process at 140oC with various reaction times 11, 12, 13, 14, 15, 16, and 17 hours. Hydroxyapatite from the synthesis results is analyzed by X-ray Diffraction (XRD). The results of XRD analysis showed the formation of hydroxyapatite compounds from an angle of 2θ which corresponds to the data (ICDD 01-072-1243). Hydroxyapatite synthesized at a reaction time of 15 hours gave the best results with a hexagonal crystal structure and a crystal size of 49.81141 nm.Keywords : carbonation, hydrothermal, PCC, reaction time.
Sintesa Precipitated Calcium Carbonate (PCC) Dari Cangkang Kerang Darah ( Anadara Granosa) Dengan Variasi Suhu Kalsinasi Dan Variasi Rasio CaO/HNO3 Paul Destin Purba; Amun Amri; Zultiniar Zultiniar; Yelmida Yelmida
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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Abstract

Precipitated Calcium Carbonate (PCC) is a calcium based chemical product that recently has widely utilized in application. The purpose of this research is to obtain PCC at once as the waste problem solver. This research using carbonation method with tested variable were the calcinations temperature and ratio of calcium oxide by nitric acid. The crushed sample were calcined according to the temperature variations (700oC, 800oC, and 900oC). Furthermore, the formed calcium oxide was slacked into the nitric acid according to several calcium oxide by nitric acid ratio (14:300, 17:300, and 20:300 gr/ml). The formed nitric calcium then was added by ammonia to pH 12 to start the synthesis calcium hydroxide. Next subsequent was carbonation, in case flowing calcium hydroxide by carbon dioxide to form white precipitate (PCC). Based on the analysis, the best result of PCC obtained at calcinations temperature of 900oC with the ratio of 14 gr:300 ml that gained 84,88%. The X-Ray Diffraction (XRD) showed that the type of crystals formed were vaterit. The Scanning Electron Microscopy (SEM) showed that the shape of crystals were round (sphere-like) with a relatively uniform size.Keywords: Calcination, carbonation, cockle shell, precipitated calcium carbonate.
Co-Authors ', Padil Abd. Rasyid Syamsuri Adam Rafif Aldori Ade Putra Adrian, Melisa Agustiyanti, Rini Dwi Agustiyanti, Rini Dwi Ahmad Fadli Ahmad Fadli Ahmad Fadli Aidil Akbar Aisyah Dewi Ranti, Aisyah Dewi Akbar, Anif Aulia Al'farisi, Cory Dian Alfarisi, Cory Alfarisi, Cory Dian Alfarizi, Cory Dian Alpina, Clara Shinta Asri Amun Amri Aras Mulyadi Ari Wibowo Harahap Audrya, Helsa Az Zahra, Alya Azriyenni Azhari Zakri Bahruddin Bahruddin Bahruddin Bintoro Bintoro Blesvid, Bloomy Caesari Caesari Cece R Chairul Chairul Chairul Chairul Chandra Marzuki Nababan Citra Arimby Dani Pradana Dedeng Hermoyo Delita, Fuji Dewi, Yuli Piana Dhini Octavianty Dian Novita Rahmawaty Dini Aulia Sari Ermal Drastinawati Drastinawati Drastinawati Drastinawati, Drastinawati Edy Saputra Elvi Yenie, Elvi EVELYN EVELYN Evelyn Evelyn Fadli, Deno Febri Fadly Sitohang Fajril Akbar Fajril Akbar Faradila, Harfiah Getra Anugrah Habib, Alltop Amri Ya Hadi Ikrima Hadrian Yonas Sebastian Napitupulu Hazzamy, Muhammad Asyaf Helda Sri Rahayu, Helda Sri Hidayat, Muhammad Ariful Holyness Nurdin Singadimedja Hotni Lamtiar Hutagaol, Nurhidayah I Gusti Bagus Wiksuana Ida Zahrina Idral Amri Ikhma Zurani Imron Sutiono Indah Sri Rahma Ningsih Indra Purnama Irdoni Irdoni Jefry Soclin Sianipar Jenial S Kamarullah, Rahmat Kayabi, Ulhunk Aulia Kendro Prasetyo Khairat, Khairat Komalasari Komalasari Komalasari Komalasari Komalasari Komalasari Komalasari Luckita, Gema Kesa Lucy Rahmawati M Asyraf Hazzamy M. Gherald Erlangga Putra M. Rafi Yunanda Mahdi, Zamratul Miftah Anugrah Mohd. Rafiq Muhammad Alfin Khairullah Muhammad Ichwan Pradana Muhammad Khairil Amri Muhammad Rahman Muhammad Syafiq Izzuddin Muhammad Yahya Muhammad Yusro Annur Mukhlis Khoirudin, Mukhlis Musbar, Al Swendo Mutamima, Anisa Nurfajriani Nurfajriani Nurfatihayati Nuruzzaman Shiqhi Padil Padil Paul Destin Purba Putri M F Putri, Desi Erika Qalbi, Tiffani R, Yolanda. Rafif Sauqi Rahimah Rahimah Ramadhan Ramadhan Rianto Harpendi Rio Saputra Ristandi, Ristandi Romadona, Syahri Rozanna Sri Irianty Rozanna Sri Irianty Rozanna Sri Irianty Ryan Tito Sanredina Sanredina Saputra, Rio Saragih E Sari D. P Shinta Elystia Siahaan, Daniel Andica Silvia Reni Yenti Sisi Oktadira Kalpatari Siti Rahmalia Sri Hidayanti Sri Murda Niati Sri Rezeki Muria Suhendri Suhendri Sunarno Sunarno Syafruddin Syafruddin SYAIFUL BAHRI Syamsu Herman Syelvia Putri Utami Tanjung, Muhamad Adrian Tengku Emrinaldi Toni Arissaputra Utama, Panca Setia Utami Utami Vina Ermalinda Wahyu Lestari Wahyu, Pri Widya Pangestu Wisrayetti Wisrayetti Wisrayetti, Wisrayetti Yeni Kusumawaty Yoanni Marsha Rezki Yoga Deswan Suwary Yolanda, Yogi Yuliatmi Yuliatmi Yunus Olivia Novanto Yunus, Aulia Yusnimar Sahan Zahrina, Zahrina Zakwan Zarkasi, Shoumi Zikri, Ahmed Zuchra Helwani Zuchra Helwani, Zuchra Zultiniar &#039; Zultiniar Zultiniar Zultiniar, Zultiniar Zultiniar, Zultiniar