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All Journal Jurnal Teknologi Industri Pertanian CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Proceedings of Annual International Conference Syiah Kuala University - Life Sciences & Engineering Chapter Jurnal Teknik Kimia USU Jurnal Bahan Alam Terbarukan Jurnal Teknik Mesin Jurnal RISET Geologi dan Pertambangan Jurnal Litbang Industri Jurnal Hasil Penelitian Industri ALCHEMY Jurnal Penelitian Kimia Jurnal Serambi Engineering Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat Jurnal Vokasi Jurnal ABDINUS : Jurnal Pengabdian Nusantara ASEAN Journal of Chemical Engineering East Asian Journal of Multidisciplinary Research (EAJMR) Jurnal Teknik Kimia USU Prosiding Seminar Nasional Universitas Serambi Mekkah Makara Journal of Science Aceh International Journal of Science and Technology PESARE: Science and Engineering Service Journal Serambi Engineering JURNAL REKAYASA KIMIA & LINGKUNGAN Jurnal Mitra Pengabdian Farmasi

Mirna Rahmah Lubis

Chemical Engineering Department, College Of Engineering, Universitas Syiah Kuala, Banda Aceh 23111

Author-ID : 2753232

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy 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 Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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Peningkatan Kinerja Membran Polietersulfon (PES) dengan Modifikasi Menggunakan Aditif Hidrofilik Mustabsyirah Mustabsyirah; Ardhila Shinta; Mirna Rahmah Lubis; Sofyana Sofyana; Mukramah Mukramah; Mukhriza Mukhriza; Wahyu Rinaldi; Umi Fathanah
Jurnal Serambi Engineering Vol 7, No 1 (2022): Januari 2022
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v7i1.3828

Membrane technology has been the methods in the management of clean water, one of polymer that used as membrane materials is polyethersulfone (PES). However, PES is easy to fouling because it is hydrophobic. Fouling will cause a decrease in membrane performance. In this study, PES membrane was modified using hydrophilic additives, namely an alloy of Mg(OH)2 and chitosan. This research study the effect of additives on the performance and anti-fouling properties of the membrane. The membrane preparation was carried out using polymer blending method. The dope solution was made by mixing 18% PES with additives in the form of an alloy of Mg(OH)2 and chitosan with varying compositions of 1% and 5%, with N-methyl-2-pyrrolidone (NMP) as a solvent, and a mixture of ethanol and water as a non-solvent. The membrane characterization was evaluated by analyzing the functional groups. Membrane performance was carried out by measuring the flux and permeability of pure water, selectivity or rejection, as well as membrane anti-fouling tests. From the results of the study, the largest permeability value in PES/NMP membrane with the addition of 5% additive (membrane N5) was 12.9 L/m2.h.bar, rejection was 33.54% with good anti-fouling properties.

Pemanfaatan Kulit Jagung sebagai Bioadsorben untuk Meregenerasi Minyak Goreng Bekas Umi Fathanah; Mirna Rahmah Lubis
Jurnal Serambi Engineering Vol 7, No 1 (2022): Januari 2022
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v7i1.3879

Cooking oil is a food processing medium that is often used by various levels of society for cooking needs. People’s habit of using cooking oil repeatedly at high temperatures will cause damage to the oil so that it greatly affects the nutrition and quality of processed foods. For this reason, it is very important to make efforts to regenerate cooking oil that has been used repeatedly with a safer process. Corn husks can be used as a bioadsorbent to regenerate used cooking oil. The purpose of this study was to investigate the effect of adding bioadsorbent from corn husks on the acquisition of moisture content, free fatty acids (FFA), and peroxide number. 200 ml of used cooking oil was contacted with corn husk bioadsorbent with the addition of 1, 5, and 10 grams of bioadsorbent and contact times of 30, 60, and 90 minutes. Furthermore, used cooking oil that has been regenerated was analyzed for moisture content, FFA, and peroxide number. The results showed that 10 grams of bioadsorbent with a contact time of 90 minutes had a moisture content of 0.15%, FFA 0.11%, and a peroxide number of 1.15 meq/kg, which met the cooking oil quality standard (SNI 3741-1995).

STUDY OF EICHORNIA CRASSIPES POWDER FROM PANTE RIEK FOR PB2+ ION ADSORPTION Mirna Rahmah Lubis
Jurnal Teknik Kimia USU Vol. 3 No. 3 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Adsorption capacity was calculated in Eichornia crassipes adsorbent. In several areas of Aceh province such as Meulaboh, Takengon, and Tamiang, people extirpate Eichornia crassipes because it is considered disturbing water flow. Therefore, this research tries to investigate the utilization of Eichornia crassipes so that it could be used as bioadsorbent in order to reduce heavy metal from waste water. The main obejctive of this research is to reduce lead content, and to determine the best condition of lead adsorption in solution by using Eichornia crassipes powder. The analysis is conducted by using Atomic Adsorption Spectrophotometer. Research result indicates that optimum adsorption occurs at solution with pH of 4.4, lead concentration of 40 mg/L, and contact time of 75 minutes. Lead adsorption by Eichornia crassipes biomass follows adsorption isotherm of Langmuir and pseudo-second order with capacity of adsorption (am) of 27,78 mg/g, and adsorption constant (K) is 12 L/mg.

Degradasi Sampah Biomassa dengan Bioaktivator EM4 sebagai Bentuk Pengendalian Limbah di Desa Neuheun Mirna Rahmah Lubis; Umi Fathanah; Cut Meurah Rosnelly; Nurul Aflah
Jurnal ABDINUS : Jurnal Pengabdian Nusantara Vol 5 No 2 (2021): Volume 5 Nomor 2 Tahun 2021
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/ja.v5i2.15549

Waste that is not managed properly in Neuheun Village, Aceh Besar Regency, can cause health and environment problems. Therefore, this service activity aims to provide the people of Neuheun village with the knowledge and skills of making organic fertilizer in a simple way. The fertilizer making is carried out through short training with raw materials that are reachable by the village community. The target of theses activities is housewives in the village, the majority of whom do not work and spend their time taking care of the household. Apart from filling the time, this activity can add insight, self-efficacy, and improve family health and economic life. These activities were attended by 20 housewives who are members of the recitation of the women of Neuheun Village. These activities take place through counseling and direct training stages. Counseling was provided through the distribution of reading materials and delivery of materials followed by the organic fertilizer making. The evaluation results show the enthusiasm of the participants in participating in the training, and they are able to make organic fertilizer. Making fertilizer is expected to be a side business and increase public knowledge about the benefits of organic fertilizers.

Comparison of Palm Oil Mill Effluent Electrocoagulation by Using Fe-Fe and Al-Al Electrodes: Box-Behnken Design Darmadi Darmadi; Mirna Rahmah Lubis; Hizir Hizir; Aula Chairunnisak; Bastian Arifin
ASEAN Journal of Chemical Engineering Vol 18, No 1 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

This present research aims to compare the COD removal of palm oil mill effluent (POME) by electrocoagulation using iron and aluminum electrodes. Response surface method coupled Box-Behnken design is applicable to investigate the effect of various process parameters (voltage, operating time and electrolyte concentration) and optimum condition. The optimum condition by using iron electrode is in 43 minutes, 20 volts and 0.06 M NaCl with the COD removal of 95.045%. By using electrode aluminum, optimum condition is 40.35 minutes, 19 volts and 0.1 M NaCl with the COD removal of 89.941%. Energy consumption of iron electrode and aluminum electrode are 0.189 and 0.209 kWh/mg decomposed COD with energy costs of Rp. 255 and Rp. 282/mg decomposed COD. This indicates that energy and cost consumption of electrocoagulation by using Al electrode are higher than those by using iron electrode. Based on the investigation during research, iron electrode is better for reducing COD while the aluminum is better in removing color in POME.

MODIFIKASI MEMBRAN POLYETHERSULFONE (PES) MENGGUNAKAN PELARUT NORMAL METHYL PYROLYDONE (NMP) SECARA NON-SOLVENT INDUCE PHASE SEPARATION (NIPS) Umi Fathanah; Izarul Machdar; Medyan Riza; Nasrul Arahman; Mirna Rahmah Lubis; Mukramah Mukramah
Prosiding Seminar Nasional USM Vol 2, No 1 (2019): Semnas Multidisiplin Ilmu
Publisher : Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2169.298 KB)

Clean water is a natural resource which is indispensable, due to the increase of population, water demand is also increasing. so that technology is needed in water treatment to satisfy the needs of clean water. Membrane separation technology is a technology that has grown rapidly in addressing the problems of water treatment. The purpose of this study was to determine the characteristics and performance of Polyethersulfone (PES) membranes modified with magnesium hydroxide or Mg(OH)2 and modification using chitosan. Membrane preparation was carried out by the phase inversion method, using an 18 wt% PES polymer modified with the addition of 0.2 wt% of Mg(OH)2, and modification using 0.2 wt% of chitosan. Furthermore, it was dissolved in N-Methyl pyrrolidone (NMP) as a solvent and the dope solution was stirred for 24 hours until it was homogeneous. Membrane characterization includes functional group analysis and measurement of the membrane water contact angle. Whereas membrane performance testing is done through permeability measurement and membrane rejection using a dead end ultrafiltration module. The results showed that the hydroxyl group (-OH) contained in Mg(OH)2 and chitosan were able to improve the hydrophilicity of the PES membrane. The membrane permeability coefficient modified with Mg(OH)2 gives a value of 8.236 L/m2.h.bar, while modifying the membrane using chitosan produces a value of 6.237 L/m2.h.bar. Both of them experience an increase compared to pure PES membrane without modification that has a permeability value of 4.123 L/m2.h.bar.

Characterizing Particle Board Made of Oil Palm Empty Fruit Bunch Using Central Composite Design Lubis, Mirna Rahmah; Maimun, Teuku; Kardi, Jon; Masra, Rifdullah Bikri
Makara Journal of Science Vol. 22, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Particle boardwas made using processed oil palm empty fruit bunch and casein glue. This research used two factor variables and eight response variables to determine the best matrix/filler ratio and compression pressure for particle board production. The factor variables, (matrix/filler ratio and compression pressure), determined the response variables: modulus of rupture, water content, density, tensile strength,and both endothermic-and-exothermic temperatures and heats. This research aimedto optimize the mechanical and physical property of particle boards by using the bunch/glue ratio. The processing of data was undertaken by Response Surface Method (RSM) with Central Composite Design (CCD). The optimal conditions under which particle board created wereat matrix/filler ratio of 50:50 and compression pressure of 3.53 kg/cm2; resulting in a modulus of rupture of 325.32 kg/cm2, water content of 0.009%, density 0.826 g/cm3, and tensile strength of 2.573 kg/cm2. This research also indicates that casein glue results in particle board with optimum parameters of endothermic temperature of 247.74 °C, an endothermic heat of -4.122 mW, exothermic temperature of 431.08 °C, and exothermic heat of 7.526 mW. Based on physical testing, most particle board properties obtained fulfilled the standards of water content and density as required by the Indonesian National Standard/SNI 03-2105-2006.

Modifikasi Membran Polyethersulfone dengan Penambahan Nanopartikel Mg(OH)2 dalam Pelarut Dimethyl Sulfoxide Umi Fathanah; Fachrul Razi; Mirna Rahmah Lubis; Mukramah Yusuf; Yanna Syamsuddin; Hesti Meilina; Syawaliah Muchtar; Suraiya Kamaruzzaman; Aula Khairunnisa
ALCHEMY Jurnal Penelitian Kimia Vol 18, No 2 (2022): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.18.2.58248.165-173

Membran Polyethersulfone (PES) bersifat hidrofobik yang memiliki ketahanan rendah terhadap sifat fouling. Fouling pada membran mengakibatkan penurunan kinerja membrane selama proses operasi. Oleh karena itu, modifikasi membran perlu dilakukan untuk meningkatkan sifat hidrofilik membrane. Pada penelitian ini modifikasi dilakukan dengan penambahan nanopartikel Mg(OH)2 yang bersifat tidak beracun, murah, dan mudah diperoleh. Penambahan aditif nanopartikel Mg(OH)2 pada membran PES dilakukan dengan cara pencampuran polimer dengan metode non solvent induced phase separation (NIPS) menggunakan pelarut dimethyl sulfoxide (DMSO). DMSO merupakan pelarut polar aprotik yang dapat melarutkan senyawa organik maupun anorganik dengan baik. DMSO juga merupakan pelarut yang tidak beracun, sehingga lebih aman dan ramah lingkungan. Penelitian ini bertujuan untuk menghasilkan membran PES hidrofilik dengan penambahan nanopartikel Mg(OH)2 dengan unjuk kerja terbaik. Pengaruh penambahan nanopartikel Mg(OH)2 dalam sistem membran dievaluasi dengan menganalisis perubahan struktur kimia PES menggunakan ATR-FTIR, perubahan morfologi menggunakan SEM, porositas menggunakan metoda gravimetri, serta pengujian kinerja (permeabilitas dan rejeksi) membran. Hasil penelitian menunjukkan bahwa penambahan nanopartikel Mg(OH)2, mengakibatkan perubahan pada struktur atau morfologi membrane PES, yang berpengaruh terhadap peningkatan permeabilitas membran. Penambahan nanopartikel Mg(OH)2 juga meningkatkan porositas membran dari 12% ‒ 40%. Kehadiran gugus hidroksil (-OH) dalam matriks membran dikonfirmasi dengan uji FTIR. Kinerja membran optimum diperoleh pada nilai permeabilitas air sebesar 56,4 L/m2.jam.bar, dengan rejeksi asam humus sebesar 61%.Modification of Polyethersulfone Membrane with the Addition of Mg(OH)2 Nanoparticles in Dimethyl Sulfoxide Solvent. Polyethersulfone (PES) membrane has hydrophobic characteristics and low resistance to fouling properties. The fouling on the membrane results in a decrease in the performance of the membrane during the operation process. Therefore, membrane modification needs to be done to increase the hydrophilic properties of the membrane. In this study, modifications were made by adding Mg(OH)2 nanoparticles which are non-toxic, inexpensive, and easy to obtain. The addition of Mg(OH)2 nanoparticle additives to PES membranes was carried out by blending polymers with the non-solvent induced phase separation (NIPS) method using dimethyl sulfoxide (DMSO) as solvent. DMSO is an aprotic polar solvent that can dissolve both organic and inorganic compounds well. DMSO is also a non-toxic solvent, making it safer and more environmentally friendly. This study aims to produce a hydrophilic PES membrane with the addition of Mg(OH)2 nanoparticles with the best performance. The effect of adding Mg(OH)2 nanoparticles in the membrane system was evaluated by analyzing changes in the chemical structure of PES using ATR-FTIR, morphological changes using SEM, porosity using the gravimetric method, and testing the performance (permeability and rejection) of the membrane. The results showed that the addition of Mg(OH)2 nanoparticles resulted in changes in the structure or morphology of the PES membrane, which affected the increase in membrane permeability. The addition of Mg(OH)2 nanoparticles also increased the porosity of the membrane from 12% to 40%. The presence of hydroxyl groups (-OH) in the membrane matrix was confirmed by FTIR analysis. The optimum membrane performance was obtained at the water permeability value of 56.4 L/m2.h.bar with 61% rejection of humic acid.

Performance Evaluation of An Innovative-Vapor- Compression-Desalination System Mirna R. Lubis,; Mark T Holtzaple
Aceh International Journal of Science and Technology Vol 1, No 1 (2012): April 2012
Publisher : Graduate Program of Syiah Kuala University

Abstract – Two dominant desalination methods are reverse osmosis (RO) and multi-stage flash (MSF). RO requires large capital investment and maintenance, whereas MSF is too energy-intensive. Innovative system of vapor compression desalination is proposed in this study. Comprehensive mathematics model for evaporator is also described. From literature study, it is indicated that very high overall-heat-transfer coefficient for evaporator can be obtained at specific condition by using dropwise condensation in the steam side, and pool boiling in the liquid side. Smooth titanium surface is selected in order to increase dropwise condensation, and resist corrosion. To maximize energy efficiency, a cogeneration scheme of a combined cycle consisting of gas turbine, boiler heat recovery, and steam turbine that drives compressor is used. The resource for combined cycle is relatively too high for the compressor requirement. Excess power can be used to generate electricity for internal and/or external consumptions, and sold to open market. Four evaporator stages are used. Evaporator is fed by seawater, with assumption of 3.5% salt contents. Boiling brine (7% salt) is boiled in low pressure side of the heat exchanger, and condensed vapor is condensed in high pressure side of the heat exchanger. Condensed steam flows at velocity of 1.52 m/s, so that it maximize the heat transfer coefficient. This unit is designed in order to produce 10 million gallon/day, and assumed it is financed with 5%, 30 years of passive obligation. Three cases are evaluated in order to determine recommended condition to obtain the lowest fixed capital investment. Based on the evaluation, it is possible to establish four-stage unit of mechanical vapor compression distillation with capital $31,723,885. Keywords: Desalination, dropwise condensation, heat exchanger, StarRotor compressor, vapor compression distillation.

Soil Quality Investigation of an Abandoned Mine Area Using Geochemical and Geospatial Approach in Jantang Village Nurul Aflah; Mulkal Mulkal; Muchlis Muchlis; Hendra Harisman; Alisastromijoyo Alisastromijoyo; Mirna Rahmah Lubis; Jessica Anggraini
Aceh International Journal of Science and Technology Vol 11, No 1 (2022): April 2022
Publisher : Graduate Program of Syiah Kuala University

The physical and chemical environmental impact in a mining area is inevitable, particularly for open pit mining areas. The impact could affect soil and water quality where mining activities, such as land clearing, blasting and hauling, occur. Thus, environmental monitoring in mining areas should be taken to measure the impact of mining activity for reclamation purposes. The objective of this research focuses on the measure of environmental impact on soil quality in terms of the nutrient content in an abandoned mine area at Jantang village, Lhoong, Aceh Besar. The research was conducted by collecting 15 soil samples, followed by laboratory analysis using atomic absorption spectrophotometry to investigate sampled 'soil's nutrients which are pH, Carbon (C-organic), Nitrogen (N-total), Phosphor (P-availability), and Ferro substance (Fe-concentration). In addition, to estimate the soil properties at locations outside the sampling area, a spatial interpolation method called inverse distance weight with an optimum power was used. The result shows that the soil is acidic, with low C-organic in the range of 0.02%–1.84%, N-total 0.02%–0.16%, and P-availability 0.55%–3.75%. In contrast, the Fe-concentration is very high, at 3000–3400 ppm.

Co-Authors Abrar Muslim Adisalamun Adisalamun Agus Hari Pramana Alisastromijoyo Alisastromijoyo Alisastromijoyo, Alisastromijoyo Ambarita, Aulia Chintia Amelia Amri Amin Amri Amin Anggraini, Jessica Ardhila Shinta Aula Chairunnisak Aula Khairunnisa Bastian Arifin Cesar B. Granda Cut Meurah Rosnelly Cut Meurah Rosnelly Dana Siswar., Evi Iskandar, Darwanis, Darmadi Darmadi Darmadi Darmadi Darmadi M. Yusuf Darwanis Darwanis Devi Rahmanda Dian Nugraha Fachrul Razi Harahap, Baran Enda Harisman*, Hendra Hendra Cipta Hendra Harisman Hendra Hasrisman Hery Widijanto Hesti Meilina Hesti Meilina Hizir Hizir Husni Husin Husni Husin Ibnu Rusydy Izarul Machdar Izarul Machdar Jessica Anggraini Jon Kardi Kardi, Jon Li Zhu Lia Mairiza M Fahmi M, Iqhramullah M, Irfan Mark T Holtzaple Masra, Rifdullah Bikri Medyan Riza Meuthia Busthan MUCHLIS Muchlis Muchlis Muchlis Muchlis Muhammad Jehan Mukhriza Mukhriza Mukramah Mukramah Mukramah Yusuf Mukramah Yusuf Mukramah Yusuf Mulkal Mulkal Mulkal, Mulkal Mulyati, Sri Muntazar, Muntazar Mustabsyirah Mustabsyirah Nafisah Al Huda Nasrul Arahman Nasrul Arahman Naufal Effendi Nova M. Nurul Aflah Nurul Aflah Nurul Aflah Nurul Kamal Paramita, Esti Pocut Nurul Alam Rifdullah Bikri Masra Rina Hazliani Ryan Moulana Sofyana Sofyana Sri Aprilia Sri Mulyati SRI RAHAYU Suparno Suparno Suparno Suparno Suraiya Kamaruzzaman Suraiya Kamaruzzaman Syaubari Syawaliah Muchtar Syawaliah Muchtar Syawaliah, Syawaliah Teuku Maimun Teuku Maimun Teuku Maimun Umi Fathanah Umi Fathanah Wahyu Rinaldi Wahyu Rinaldi Yanna Syamsuddin Yanna Syamsuddin Yoessi Oktarini yunardi, yunardi Zuhra Zuhra Zuhra

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