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All Journal Jurnal Teknologi Industri Pertanian CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) JURNAL KIMIA SAINS DAN APLIKASI 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 KACANEGARA Jurnal Pengabdian pada Masyarakat Jurnal Serambi Engineering Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat Kumawula: 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 Makara Journal of Technology Aceh International Journal of Science and Technology PESARE: Science and Engineering Service Journal Journal Serambi Engineering (JSE) 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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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.

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.

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.

Peningkatan kinerja membran hidrofobik polyethersulfone (PES) menggunakan silika berbasis sekam padi sebagai aditif Umi Fathanah; Mirna Rahmah Lubis; Cut Meurah Rosnelly; Syawaliah Muchtar; Mukramah Yusuf
Jurnal Litbang Industri Vol 14, No 1 (2024)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24960/jli.v14i1.8299.85-92

Penelitian ini menyelidiki pengaruh penambahan aditif silika dari seka padi untuk meningkatkan kinerja dan kketahanan terhadap fouling. Pembuatan membran dilakukan dengan metode non solvent induced phase separation (NIPS) secara blending polimer. Membran yang dihasilkan dikarakterisasi dengan mengevaluasi gugus fungsi mengunakan FTIR, struktur morfologi menggunakan SEM, sudut kontak air menggunakan WCA meter serta uji porositas membran dengan metode gravimetri. Temuan penelitian menunjukkan bahwa aditif silika memiliki pengaruh positif dalam membran PES yang telah disiapkan. Terjadinya perubahan struktur morfologi membran yang dibuktikan dari hasil SEM pada penampang melintang membran. Peningkatan konsentrasi silika yang ditambahkan, mengakibatkan peningkatan porositas serta sifat hidrofilisitas membran modifikasi. Hasil penelitian menunjukkan fluks air optimum diperoleh pada penambahan 3% silika yaitu sebesar 62,3 L/m2.jam dengan rejeksi asam humus sebesar 64,4% dengan sifat anti fouling membran meningkat sebesar 2,7 kali dibandingkan dengan membrane PES tanpa modifikasi.

GEOCHEMICAL SURVEY FOR DETERMINING GOLD CONTENT USING X-RAY DIFFRACTION METHOD IN GUNONG UJEUN OF KRUENG SABEE DISTRICT ACEH JAYA Muntazar, Muntazar; Aflah, Nurul; Lubis, Mirna Rahmah; Muchlis, Muchlis
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 12 No 1 (2024): Cakra Kimia (Indonesia E-Journal of Applied Chemistry)
Publisher : Graduate Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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

ABSTRAK: Survei geokimia dilakukan untuk mendeteksi kandungan dari berbagai jenis mineral yang ada. Identifikasi emas pada batuan dari lokasi penambangan emas rakyat di Gunong Ujeun, Krueng Sabee, Aceh Jaya telah dilakukan menggunakan metode X-Ray Diffraction (XRD). Pada penelitian ini, proses identifikasi mineral dilakukan pada beberapa lokasi di Krueng Sabee. Sampel batuan yang terkumpul diproses untuk mendapatkan bubuk berbutir halus yang sesuai untuk dianalisis. Selanjutnya sampel tersebut dianalisis kadar emasnya menggunakan alat X-Ray Diffractometer. Data pengujian menggunakan XRD kemudian dianalisis menggunakan aplikasi Match!3. Mineral utama yang diidentifikasi dalam sampel batuan termasuk kuarsa, illit, magnetit, zircon, albit, dan hastingsit. Mineral-mineral ini umumnya terkait dengan mineralisasi emas. Hasil analisis menunjukkan bahwa kandungan emas tertinggi terdapat pada lokasi BT-02 dengan kadar 1,746% dan lokasi terendah yaitu lokasi BT-04 dengan kadar 0,029%. Pengujian dilakukan menggunakan Cu-Ka dengan panjang gelombang 1,542 Å. Hasil akhir tersebut diinterpretasikan dalam bentuk peta kadar emas. ABSTRACT: Geochemical surveys have been conducted to detect the content of various types of minerals. The identification of gold in rock from the traditional gold mining in Gunong Ujeun, Krueng Sabee, Aceh Jaya using X-Ray Diffraction (XRD) method has been carried out. In this study, the mineral identification process was conducted at several locations in Krueng Sabee. The collected rock samples were processed to obtain fine-grained powder suitable for analysis. Subsequently, the gold content in the samples was analyzed using X-Ray Diffractometer. The XRD data were then analyzed by Match!3 software. The main minerals identified in the rock samples included quartz, illite, magnetite, zircon, albite, and hastingsite. These minerals are commonly associated with gold mineralization. The results indicate that the highest gold content was found in sample BT-02 at 1.746%, while the lowest was in sample BT-04 at 0.029%. The test was conducted using Cu-Ka with a wavelength of 1.542 Å. The final results was interpreted as a gold grade map.

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.11.1.23323

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 30003400 ppm.

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

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