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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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OPTIMASI PARAMETER EKSTRAKSI OLEORESIN DARI AMPAS PALA MENGGUNAKAN RESPONSE SURFACE METHODOLOGY (Optimization of Extraction Parameter of Oleoresin from Nutmeg Waste through Response Surface Methodology) Darmadi, Darmadi; Riza, Medyan; Lubis, Mirna Rahmah
Jurnal Hasil Penelitian Industri Vol 28, No 1 (2015)
Publisher : Baristand Industri Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.353 KB)

Optimization of extraction parameter of oleoresin from nutmeg waste has been developed.The waste could be alternative raw material of oleoresin to replace fresh nutmeg whose price is costly. Sofar, nutmeg waste from volatile oil factory is not utilized maximally. Its utilization as product that hasadditional value could be carried out by extraction method of nutmeg oleoresin. The research aims tooptimize oleoresin extraction condition (temperature, solvent amount, and particle size) from nutmegwaste by using Response Surface Methodology. The condition is designed randomly by Box-Behnkenmethod to result in 17 experiment. The effect of extraction condition toward yield and index of refractionis determined through calculation and analysis by using refractometer, respectively. The highest value ofindex of refraction in the research is 1.4852. The optimum condition to result in the highest yield14.5525% is at temperature of 40oC, solvent amount of 200 ml, and particle size of -20+30 mesh.Optimization by using the method indicates that optimum parameter is obtained at temperature of35.86oC, solvent amount of 167.13 ml, and particle size of 10 mesh. The research result is expected toprovide information on operational effectivity in the perspective of production cost that could be utilizedby production center of nutmeg oleoresin.

SYHNTHESIS OF CHITOSAN MODIFIED POLYURETHANE FOAM FOR ADSOPRTION OF MERCURY (II) IONS Darmadi, Darmadi; M, Irfan; M, Iqhramullah; Marlina, Marlina; Lubis, Mirna Rahmah
Jurnal Bahan Alam Terbarukan Vol 7, No 1 (2018): June 2018 [Nationally Accredited]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v7i1.13614

Mercury from the traditional gold mining activities in Aceh Jaya Regency causes water source and thus residents are exposed to mercury metals. In organic and inorganic conditions, mercury is toxic to the human body, causes damage to the nerve system, kidney failure, heart failure, blood pressure disorders, and damage to the immune system. The problem of mercury contamination can be chemically solved in various ways. This research uses polyurethane foam to adsorb mercury from water. The adsorption and selectivity of polyurethane foam adsorption can be improved through modification with Chitosan. In this research, preheating temperature, glycerol and toluene di-isocyanate (TDI) compositions greatly affect the physical form of foam. The condition under which optimal glycerol composition used for synthesizing the polyurethane foams is 20% (w/w of mixture A). This glycerol composition results in polyurethane foams with an optimum ratio of the mixture A/TDI/distilled water of 2 : 1 : 1. The best adsorption is obtained with polyurethane foam added by 2.5% Chitosan. The optimum mercury adsorption 25% is resulted from the operating time of 60 minutes with adsorption capacity of 0.313 mg/g. For Chitosan modified polyurethane foam, research points out that the reaction is the second order reaction. The result concluded that the polymer has semi crystalline crystallization and melting temperatures.

ADSORPTION MODELING ON CARBON MONOLITHIC COLUMN FOR METHYLENE BLUE REMOVAL Darmadi, Medyan Riza dan Mirna Rahman Lubis TIP
Jurnal Teknologi Industri Pertanian Vol. 25 No. 1 (2015): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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Model matematika telah dikembangkan untuk sistem batch dan kontinyu. Pada sistem batch, kinetika adsorpsi oleh monolith berlapis karbon dikaji untuk menganalisis kurva hasil penelitian dengan menggunakan model perkiraan Gaya dorong linear. Kinerja pada kolom monolith dievaluasi melalui kurva output. Model prediksi aliran sumbat yang terdispersi, dengan laju adsorpsinya dinyatakan oleh model tersebut, juga diidentifikasi. Kesetimbangan yang dinyatakan oleh isotermal Langmuir dan parameter laju yang termuat dalam dua persamaan, diperoleh dari penelitian secara batch. Kapasitas adsorpsi monolith karbon aktif tersebut adalah 190 mg/g dan koefisien gaya dorong liniarnya berkurang dari 0,011 menjadi 0,0052 per menit dengan kenaikan konsentrasi awal metilen biru dari 10 hingga 50 ppm. Prediksi yang menggunakan perkiraan gaya dorong linear untuk laju adsorpsi tersebut sesuai dengan data output penelitian.Kata kunci: adsorpsi, kurva output, gaya dorong linear, kolom monolith, metilen biru

Peningkatan Kinerja K3 Dan KO Di Perusahaan Pertambangan Melalui Penerapan SMKP Nurul Kamal; Mirna Rahmah Lubis; Muhammad Jehan
Jurnal Teknik Mesin Unsyiah Vol 7, No 1 (2019)
Publisher : Jurnal Teknik Mesin Unsyiah

PT Adaro Indonesia is a mining company that operates under the covenant of works concessions of coal mining, on the mining area of PT Adaro Indonesia or ADMO (Adaro Mining Operation) there is a mining services company PT Saptaindra Sejati (PT. SIS), that move in modern mining and contractors provide services for mining and related industries in the ADMO. The research methodology was literature study, field observation, and questioning employees. PT.SIS has been applied Mining Safety Management System application of Mineral and Coal as know as (SMKP Minerba) for all elements, but the level of the achievement on the elements are 88.29% still dropping from the previous year to reach 92.80%. this publication only for element IV, Implementation. The achievement on this element only reached 79% below previous year reach 91%. Provide recommendations as an attempt to improvement efforts to PT. SIS, as well as the company's internal evaluation in order to no longer obtained the findings of major or minor in following (SMKP) audit.

Biodegradable Plastic from Cassava Waste using Sorbitol as Plasticizer Wahyu Rinaldi; Mirna Rahman Lubis; Umi Fathanah
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 5, No 1 (2015): Engineering
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (141.817 KB)

Cassava waste can be utilized as raw material for biodegradable plastics. This research studied the influence of sorbitol, carboxymethyl cellulose (CMC) and the gelatinization temperature in the preparation of biodegradable plastic from cassava waste. 12 gram of starch from cassava waste was stired with 68.2 gram of water-ethanol solution at 75 rpm and is fixed during this study. While the amount of sorbitol, CMC and gelatinization temperature are varied. The best results are showed at 44.90% in water absorption, 101.4 MPa in tensile strength, 76.57% in elongation, 4.17 MPa in Young's modulus, and decomposition time are 64, 67, and 79 days.

Biopolymer From Starch And Chitosan As Bioplastic Material For Food Packaging Umi Fathanah; Mirna Rahman Lubis; Ryan Moulana
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 5, No 1 (2015): Engineering
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (93.894 KB)

This research aims to improve economic value of cassava peel waste as raw material of bioplastic making, whose existence is still very abundant and has not been benefitted optimally. Bioplastic making is conducted by mixing starch and chitosan with gliserol as plasticizer. Bioplastic making is carried out at gelatinization temperature of 80oC. Chitosan addition is carried out at variatios of 0; 10; 20; 30; and 40 (% w). Research result indicates that mechanical property i.e. optimum value of tensile strength is obtained at value of 38.25 MPa with chitosan addition as much of 30%. The highest elongation percentage is obtained as much of 41.25% with addition of 10% chitosan. Physical property of resulted bioplastic is obtained from the best swelling test at addition of 40% chitosan i.e. 0.38%, and bioplastic density obtained is ranged from 2 – 3.33 g/ml. Analysis of functional group by using FTIR exhibits the existence of ester and carbonyl groups that indicates that resulted bioplastic could be degraded. Whereas biodegradability test on environment exhibits that bioplastic could be completely degraded in soil for 24 days.

ANALISIS MODULUS DEFORMASI MASSA BATUAN PADA SEGMEN JALAN USAID KM 27 HINGGA KM 30 BERDASARKAN KLASIFIKASI MASSA BATUAN Ibnu Rusydy; Nafisah Al-Huda; M Fahmi; Naufal Effendi; Abrar Muslim; Mirna Lubis
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 30, No 1 (2020)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2020.v30.1073

Penelitian modulus deformasi dan klasifikasi massa batuan mengunakan sistem RMR (rock mass rating) dan GSI (geological strength index) telah dilakukan di Jalan Raya USAID km 27 hingga km 30. Lintasan jalan di daerah ini berada pada batuan yang mengalami deformasi akibat aktivitas tektonik sehingga pada bagian lereng badan jalan ditemukan rekahan-rekahan yang berpotensi longsor, maka diperlukan rekayasa lereng dengan menganalisis dan menilai klasifikasi massa batuan. Penelitian ini bertujuan untuk mengidentifikasi klasifikasi massa batuan dengan RMR (rock mass rating), GSI (geological strength index), dan besaran nilai modulus deformasi massa batuan yang terdapat pada batugamping lempungan. Metode penelitian yaitu dengan melakukan scanline untuk mengambil data orientasi struktur geologi untuk analisis kinematik lereng dan kondisi bidang diskontinuitas (kemenerusan, bukaan, kekasaran, isian, tingkat pelapukan dan kondisi keairan), termasuk kekuatan batuan utuh yang diambil dari lereng batuan untuk menghitung nilai RMR dan GSI. Pendekatan empiris dilakukan untuk mengestimasi nilai modulus deformasi berdasarkan nilai GSI. Hasil penelitian menunjukkan bahwa longsor batuan yang akan terjadi berdasarkan analisis kinematik adalah longsoran jenis planar, gulingan, dan baji. Nilai RMR masing-masing lereng 1, 2, 3 dan 4 adalah sebesar 60, 64, 60, dan 61, sementara nilai GSI sebesar 50, 51, 52 dan 54 secara berurutan. Nilai modulus deformasi massa batuan untuk batugamping lempungan sebesar 50 GPa untuk semua lereng. ABSTRACTS - Rock mass modulus deformation analysis in USAID highways segment km 27th to km 30th based on rock mass classifications. Rock mass modulus deformation and rock mass classifications utilizing RMR (rock mass rating) and GSI (geological strength index) have been conducted in USAID Highways segment from km 27th to km 30th where is built on the rocks which are highly influenced by tectonic force and deformed by tectonic activity; hence, the rock on the slopes are fractured, folded and potentially to failure. These circumstances need a rock engineering approach by applying rock mass classification methods. This research aims to identify the rock mass classifications based on RMR, GSI, and to estimate the rock mass modulus deformation working on rock slope of argillaceous limestone. Scanline approach was utilized in structural geology data acquisition for rock slope kinematic analysis and joints condition (persistence, aperture, roughness, infilling, weathering, and watering) included the strength of intact rock is obtained from rock slope in calculating the RMR and GSI ratings. The empirical approach was deployed in estimating the rock mass modulus deformation based on GSI value. Rock slope kinematic analysis reveals the possibility of rock failure that will be occurred on the slopes are plane, toppling, and wedge failures. The total RMR ratings are 60, 64, 60, and 61 for slope 1, 2, 3, and 4, while the total GSI values are 50, 51, 52, and 54 respectively. Rock mass modulus deformation for argillaceous limestone in this study area is 50 GPa for every slope.

STUDY OF EICHORNIA CRASSIPES POWDER FROM PANTE RIEK FOR PB2+ ION ADSORPTION Mirna Rahmah Lubis
Jurnal Teknik Kimia USU Vol 3, No 3 (2014)
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.

The Coaching of Family Welfare and Empowerment Group of Krueng Barona Jaya through the Making of Soap Mirna Rahmah Lubis; Husni Husin; Lia Mairiza; Yoessi Oktarini
ABDIMAS: Jurnal Pengabdian Masyarakat Vol. 4 No. 2 (2021): ABDIMAS UMTAS: Jurnal Pengabdian Kepada Masyarakat
Publisher : LPPM Universitas Muhammadiyah Tasikmalaya

The Krueng Barona Jaya is a sub-district in Aceh Besar District, Aceh Province, Indonesia. This sub-district is located near the Ulee Kareng area, Banda Aceh. The Krueng Barona Jaya sub-district has at least more than 16,000 people spread across a number of locations. Most of the residents in Krueng Barona sub-district earn their living as farmers, domestic workers, civil servants, entrepreneurs, and 31.53% have temporary jobs. This situation can be improved by providing various training to residents to help them establish their own or group businesses. The community service activity is intended to improve public understanding about technology of making liquid soap. To achieve this objective the team sincerely helped provided training on the process of making liquid soap for mothers in the family-welfare-empowerment group. The results of interviews with the community and sub-district officials showed that the women of the group were very enthusiastic in participating in soap making training and other similar activities. The results of interviews with the community and sub-district officials showed that the women of the group were very enthusiastic in participating in soap making training and other similar activities. The results of the discussion indicated that the participants’ mastery of making soap was very good. This training and coaching opens people’s mind to change their habits and thinking patterns.

Sintesis, Karakterisasi dan Kinerja Membran Hidrofobik Menggunakan Polyvinyl Pyrrolidone (PVP) sebagai Aditif Umi Fathanah; Mirna Rahmah Lubis; Zuhra Mahyuddin; Syawaliah Muchtar; Mukramah Yusuf; Cut Meurah Rosnelly; Sri Mulyati; Rina Hazliani; Devi Rahmanda; Suraiya Kamaruzzaman; Meuthia Busthan
ALCHEMY Jurnal Penelitian Kimia Vol 17, No 2 (2021): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.17.2.48435.140-150

Artikel ini melaporkan tentang sintesis, karakterisasi dan kinerja membran polyethersulfone (PES) yang dimodifikasi dengan aditif polyvinyl pyrrolidone (PVP) dengan tujuan untuk meningkatkan kinerja dan sifat antifouling membran. Membran PES modifikasi dibuat dengan penambahan 0,5% PVP sebagai aditif, menggunakan pelarut dimethyl sulfoxide (DMSO) dan n-methyl pyrrolidone (NMP). Pengaruh penambahan aditif dalam sistem membran dievaluasi dengan menganalisa perubahan struktur kimia menggunakan fourier transform infrared (FTIR), perubahan morfologi permukaan menggunakan scanning electron microscopy (SEM), uji kuat tarik menggunakan tensile strength meter, uji porositas membran dengan menggunakan metode gravimetri, serta pengujian kinerja filtrasi, dan sifat antifouling. Hasil analisa struktur membran dengan SEM menunjukkan adanya pengaruh jenis pelarut dan penambahan aditif terhadap perubahan morfologi membran. Selain itu modifikasi membran juga meningkatkan porositas, kinerja fluks permeasi serta sifat antifouling membran. Hasil uji filtrasi membran menunjukkan perolehan permeabilitas air pada membran D-0,5 dan N-0,5 masing masing sebesar 47,5 L/m2.jam.atm dan 41,5 L/m2.jam.atm dengan sifat antifouling membran modifikasi lebih besar dibandingkan dengan membran tanpa modifikasi. Synthesis, Characterization, and Performance of Hydrophobic Membranes Using Polyvinyl Pyrrolidone (PVP) as Additives. This paper discusses the synthesis, characterization and performance of polyethersulfone (PES) membranes modified with polyvinyl pyrrolidone (PVP) additives in order to improve the performance and antifouling properties of membranes. The modified PES membrane was prepared by adding 0.5% PVP as an additive, using dimethyl sulfoxide (DMSO) and n-methyl pyrrolidone (NMP) as solvents. The effect of adding additives to the membrane system was evaluated by analyzing changes in chemical structure using fourier transform infrared (FTIR), changes in surface morphology using scanning electron microscopy (SEM), tensile strength test using tensile strength meter, membrane porosity test using the gravimetric method, as well as testing the filtration performance and antifoulingproperties. The results of membrane structure analysis by SEM showed the influence of the type of solvent and additives on changes in membrane morphology. In addition, membrane modification also increases porosity, permeation flux performance, and membrane antifouling properties. The results of the membrane filtration test showed that the water permeability of D-0.5 and N-0.5 membranes was 47.5 L/m2.h.atm and 41.5 L/m2.h.atm, respectively, with modified membrane antifouling properties larger than the membrane without modification.

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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