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Pengaruh Penambahan Brij35 serta Methacryloyloxylethyl Phosphoryl Choline terhadap Karakteristik dan Kinerja Membran Mukramah Yusuf Wahab; Syawaliah Muchtar; Nasrul Arahman; Sri Mulyati; Medyan Riza; Umi Fathanah; Aula Chairunnisak; Fauzan Al Chalifa
Jurnal Serambi Engineering Vol 8, No 3 (2023): Juli 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i3.6243

Artikel ini melaporkan tentang karakteristik dan kinerja dari membran polyvinylidene fluoride (PVDF) yang dimodifikasi dengan memadukan surfaktan nonionik dan aditif zwitterionik melalui metode nonsolvent-induced phased separation (NIPS). Modifikasi ini bertujuan untuk meningkatkan sifat hidrofilisitas dan kinerja membran. Membran PVDF modifikasi dibuat dengan penambahan 5 gram Brij-35 dan variasi Methacryloyloxylethyl phosphorylcholine (MPC) sebanyak 0,5 dan 1 gram sebagai aditif, menggunakan pelarut N, N-dimethylacetamide (DMAc) dan non-pelarut berupa akuades. Pengaruh penambahan aditif ke dalam sistem membran dianalisis dengan mengamati perubahan struktur morfologi membran menggunakan SEM, tingkat hidrofilisitas membran diuji dengan mengukur sudut kontak air pada permukaan membran. Selain itu membran juga diuji kinerja filtrasinya menggunakan modul cross-flow. Filtrasi dilakukan pada tekanan operasi 1 bar. Kemudian untuk pengujian rejeksi, digunakan larutan asam humus sebagai model kontaminannya. Kinerja filtrasi membran menggunakan sampel air murni menghasilkan nilai fluks maksimal pada membran yang dimodifikasi dengan penambahan Brij35-5. Namun, selektivitas yang dihasilkan menurun dari 96% (pure PVDF) menjadi 76%. Di sisi lain, membran yang dimodifikasi dengan penggabungan aditif mampu menghasilkan kinerja yang lebih baik yaitu dengan nilai fluks sebesar 126 L/m2h dan mampu merejeksi asam humus sebesar 90%.

Pengaruh Penambahan Brij35 serta Methacryloyloxylethyl Phosphoryl Choline terhadap Karakteristik dan Kinerja Membran Mukramah Yusuf Wahab; Syawaliah Muchtar; Nasrul Arahman; Sri Mulyati; Medyan Riza; Umi Fathanah; Aula Chairunnisak; Fauzan Al Chalifa
Jurnal Serambi Engineering Vol 8, No 3 (2023): Juli 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i3.6243

Artikel ini melaporkan tentang karakteristik dan kinerja dari membran polyvinylidene fluoride (PVDF) yang dimodifikasi dengan memadukan surfaktan nonionik dan aditif zwitterionik melalui metode nonsolvent-induced phased separation (NIPS). Modifikasi ini bertujuan untuk meningkatkan sifat hidrofilisitas dan kinerja membran. Membran PVDF modifikasi dibuat dengan penambahan 5 gram Brij-35 dan variasi Methacryloyloxylethyl phosphorylcholine (MPC) sebanyak 0,5 dan 1 gram sebagai aditif, menggunakan pelarut N, N-dimethylacetamide (DMAc) dan non-pelarut berupa akuades. Pengaruh penambahan aditif ke dalam sistem membran dianalisis dengan mengamati perubahan struktur morfologi membran menggunakan SEM, tingkat hidrofilisitas membran diuji dengan mengukur sudut kontak air pada permukaan membran. Selain itu membran juga diuji kinerja filtrasinya menggunakan modul cross-flow. Filtrasi dilakukan pada tekanan operasi 1 bar. Kemudian untuk pengujian rejeksi, digunakan larutan asam humus sebagai model kontaminannya. Kinerja filtrasi membran menggunakan sampel air murni menghasilkan nilai fluks maksimal pada membran yang dimodifikasi dengan penambahan Brij35-5. Namun, selektivitas yang dihasilkan menurun dari 96% (pure PVDF) menjadi 76%. Di sisi lain, membran yang dimodifikasi dengan penggabungan aditif mampu menghasilkan kinerja yang lebih baik yaitu dengan nilai fluks sebesar 126 L/m2h dan mampu merejeksi asam humus sebesar 90%.

Pengabdian Kepada Masyarakat Dengan Pendekatan Bakti Sosial dan Pelaksanaan Pelatihan Secara Berkelanjutan Rahmawati, Sri; Asmadi, Didi; Andriansyah, Andriansyah; Riza, Medyan; Hasanuddin, Iskandar; Hidayaturrahmi, Hidayaturrahmi
Jurnal Pengabdian Masyarakat: Darma Bakti Teuku Umar Vol 4, No 1 (2022): Januari-Juni
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/baktiku.v4i1.3939

Aceh merupakan salah satu provinsi yang masih terus bergelut dengan masalah kesenjangan ekonomi. Masih banyak masyarakat Aceh yang bekerja sebagai buruh harian dengan pendapatan yang minim dan kondisi kekurangan pengetahuan untuk pengelolaan sumber daya. Hal ini terus meningkat kala kondisi Aceh atau suatu daerah tertentu dihadapi dengan kondisi-kondisi bencana alam yang membatasi perputaran ekonomi dan kelancaran aktifitas normal harian seperti kondisi oleh pandemi covid-19 dan bencana alam. Untuk mendukung upaya dalam membantu masyarakat kecil yang terdampak ekonomi maka diperlukan peran akademisi, mahasiswa, masyarakat lainnya untuk bersama-sama membantu menyelesaikan masalah yang ada disekitar salah staunya dengan mengadakan bakti sosial dan pelaksanaan pelatihan secara berkelanjutan. Tujuan dari kegiatan ini adalah untuk membantu masyarakat, membangun rasa empati antar sesama dan membantu meningkatkan pengetahuan untuk pengelolaan sumber daya. Hasil yang diperoleh adalah penyaluran bakti sosial yang disalurkan tepat sasaran dan pengadaan pelatihan atau kunjungan relawan yang dilakukan akan bersifat berkelanjutan. Kata Kunci: Ekonomi, bakti sosial, covid-19, bencana alam.

Pengembangan Industri Kecil Menengah Produk Olahan Tiram di Desa Tibang Andriansyah, Andriansyah; Asmadi, Didi; Zuhri, Sarika; Sentia, Prima Denny; Riza, Medyan; Hidayaturrahmi, Hidayaturrahmi; Prasanti, Nissa
Jurnal Pengabdian Masyarakat: Darma Bakti Teuku Umar Vol 3, No 1 (2021): Januari-Juni
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/baktiku.v3i1.2843

Tibang Village is a village located in a coastal area in the city of Banda Aceh. This village is famous for its natural potential that produces oyster shells. Based on observations, these oyster shells are processed into edible nuggets and oyster crackers. The problem in this village is the lack of understanding of the community on how to manage and create potential industry with processed oyster shell products. The purpose of this article is to study and design the supply chain network in the management of oyster processed products. Supply chain management is an approach taken to increase the competitiveness of a product. The results of the study were socialized to villagers to increase understanding of the importance of managing oyster shell processed products from upstream to downstream. The results obtained are that in the management of oyster shells processed products, it is necessary to have actors who play a role in collecting raw oysters from farmers before they are processed into nuggets and oyster crackers

Ensuring Accuracy: Critical Validation Techniques in Geochemical Analysis for Sustainable Geothermal Energy Development Idroes, Ghazi Mauer; Suhendrayatna, Suhendrayatna; Khairan, Khairan; Suhartono, Eko; Prasetio, Rasi; Riza, Medyan
Leuser Journal of Environmental Studies Vol. 2 No. 1 (2024): April 2024
Publisher : Heca Sentra Analitika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60084/ljes.v2i1.176

Geochemical analysis is a critical tool in geothermal exploration, providing valuable insights into reservoir characteristics. However, obtaining accurate and reliable geochemical data requires rigorous validation techniques. This review examines key factors affecting the accuracy of geochemical data and discusses best practices for ensuring quality. Proper sampling methods, including selection of representative locations, use of appropriate equipment, and adherence to robust protocols for sample collection, filtration, preservation, and storage, are essential for maintaining integrity. Analytical techniques must be carefully selected, with regular calibration and standardization of instruments using certified reference materials. Implementing comprehensive quality assurance and quality control procedures, such as analyzing blanks, duplicates, and spike samples, helps monitor precision and accuracy. Data interpretation should consider the complexities of the geological and hydrological settings, integrating multiple lines of evidence. By following established guidelines and continuously updating methods based on emerging technologies and inter-laboratory comparisons, geothermal teams can optimize the reliability of their geochemical data. Accurate and precise geochemical information, when combined with geological, geophysical, and hydrological data, enables informed decision-making and enhances the success of geothermal projects. As geothermal energy gains importance in the transition to sustainable resources, ensuring the accuracy of geochemical analysis will be crucial for effective exploration and development.

The Improvement of Hydrophilic Property of Polyethersulfone Membrane with Chitosan as Additive Umi Fathanah; Izarul Machdar; Medyan Riza; Nasrul Arahman; Mirna Rahmah Lubis; Mukramah Yusuf
Jurnal Rekayasa Kimia & Lingkungan Vol 15, No 1 (2020): Jurnal Rekayasa Kimia & Lingkungan (June, 2020)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v15i1.15916

Membrane technology has been implemented broadly for clean water treatment. To produce a better membrane, modification is carried out by adding chitosan into a polymer solution. Materials used in this research are polyethersulfone (PES) 18%, the n-methyl pyrrolidone solvent modified with a chitosan solution (at 0.2 1 wt%) as an additive, and deionized water as a non-solvent. The membrane synthesis is carried out with the non-solvent induced phase separation method of blending the polymer. Membrane characterization includes functional group analysis, morphological structure, and water contact angle. Membrane performance is monitored at the filtration process, resulting in the permeability coefficient, and for the rejection of a contaminant (humic acid) with dead-end filtration. Research results show that the modified membrane characterization has an asymmetric morphological structure with a thinner top layer, and the membrane sublayer has a finger-like macrovoid structure with a larger size as compared to the original PES membrane (without the chitosan solution addition). The chitosan additive into the PES membrane improves the membranes hydrophilic property. The highest value of the permeability coefficient is achieved with a 1% chitosan addition, which provides a permeability coefficient value of 10.524 L/m2.h.bar and a rejection coefficient of 70.3%.

The Performance and Characterization of Biodegradable Plastic from Tapioca Starch: Effect of Modified Chitosan Lia Ernita; Medyan Riza; Syaubari Syaubari
Jurnal Rekayasa Kimia & Lingkungan Vol 15, No 1 (2020): Jurnal Rekayasa Kimia & Lingkungan (June, 2020)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v15i1.15441

The performance and characterization of biodegradable plastic from tapioca starch was studied. Modified the chitosan was one of the ingredients for produce the biodegradable plastics. The produced biodegradable polastic were thin sheet plastic, elastic and transparent. The biodegradable plastic performance had tensile strength between 2,26-3.73 Mpa, elongation ranges from 17.24 to 76.76%, and water absorption ranges from 30.81-268.9%. In antioxidant analyze, apples are wrapped in plastic and had significant mechanical properties changes on 8th day.Morphology scanning result showed that in the chitosan-polyNIPAM there were no cavities may caused high hydrophilicity in the biodegradable plastic.

The Impact of Silica Nanoparticles on the Properties of WPI/CMC Biocomposite Films for Packaging Applications Mukhlishien; Syahiddin DS; Medyan Riza; Azwar
Jurnal Serambi Engineering Vol. 9 No. 4 (2024): Oktober 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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

WPI/CMC biocomposite films reinforced with silica offer a biodegradable alternative to traditional plastics. The primary aim was to assess the impact of silica reinforcement on the films' physical, mechanical, water barrier, and thermal properties, which are crucial for packaging applications. Silica nanoparticle reinforcement significantly enhanced the tensile strength of WPI/CMC biocomposite films, reaching a maximum of 27.07 MPa at a 7% silica concentration. This enhancement in tensile strength came at the cost of reduced elongation, which decreased from 26.48% to 8.32%. The thickness of WPI/CMC biocomposite films with silica addition ranged from 0.126 to 0.371 mm. Silica incorporation significantly reduced water absorption, with a decrease from 83.23% to 63.33%. Tensile strength varied significantly, ranging from 2.02 to 27.07 MPa. Similarly, the elongation values ranged widely, from 7.42% to 26.48%. Thermal properties increased with the increase of silica. The morphology of the biocomposite films with 1%, 3%, 5%, 7%, and 9% silica additions exhibited uneven surfaces. The morphology of the biocomposite films was also affected by silica incorporation. The addition of silica nanoparticles resulted in uneven surfaces, which may influence the film's barrier properties and overall performance. Silica nanoparticle reinforcement offers a promising approach to enhance the mechanical properties of WPI/CMC biocomposite films. However, careful optimization of silica concentration is crucial to balance strength and flexibility.

Effect of Gondorukem (Arpus) Adhesive Composition on Organic Waste-Based Briquettes using Biodrying Technology Ridwandi; Dewi, Rozanna; Zulnazri, Zulnazri; Sylvia, Novi; Riza, Medyan
Indonesian Journal of Chemical Analysis (IJCA) Vol. 8 No. 1 (2025): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol8.iss1.art1

Briquettes are an alternative to coal, wood, and fossil fuels. Briquettes can be made with simple, inexpensive materials. The adhesive is gondorukem (arpus), which is easy to find. Making briquettes involves preparing raw materials, mixing adhesives with organic waste, and testing the finished product. The adhesive variations used were 5, 10, 15, 20 and 25%. Briquettes made with 5% gondorukem (arpus) adhesive had the lowest ash content. Briquettes with 25% gondorukem (arpus) had the highest ash content at 8.31%. Adhesives affect ash content. Moisture content analysis obtained with a value of 9.49% to 10.30%, the value is stable. The volatile content is 3.41-4.66%, which meets the SNI 01-6235 2000 standard. Calorimetry, all samples except 5% adhesive meet SNI 01-6235 2000 with minimum 5000 Cal/g (20934 J/g). Briquettes had density values of 0.0034176-0.004359 g/cm³, affecting energy content and combustion. Bound carbon analysis showed that all samples met the standard value of SNI 4931-2010. The burning rate of organic waste-based briquettes with different adhesives is 27 to 39 minutes, with a weight of 3.108 to 4.753 g/min. Briquettes take 66-111 seconds to ignite. SEM analysis shows rod-shaped substances, indicating organic waste and adhesives. The fibers visible are from the organic waste.

Characterization of Sago Starch-Based Biofoam with Corn Husk Fiber Filler Rozanna Dewi; Novi Sylvia; Zulnazri; Sri Rahayu Retnowulan; Agam Muarif; Ahmad Fikri; Medyan Riza
Jurnal Bahan Alam Terbarukan Vol. 13 No. 2 (2024): December 2024 [Nationally Accredited Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v13i2.2209

The use of biofoam is one of the ways to reduce plastic waste that pollutes the environment. In this research, we want to develop biofoam from sago starch as a basic ingredient with the addition of corn husk fiber filler and the addition of magnesium stearate which aims to improve mechanical characteristics, thermal, morphological, water absorption and biodegradabillity. Variations of corn husk fiber used were 45 g, 50 g, 55 g and 60 g, with variations in the concentration of NaOH solvent used for cellulose extraction were 3%, 5%, 7% and 9%. The mechanical characteristics (tensile strength) of the resulting biofoam range from 1.37 – 2.45 MPa. The chemical bonding of biofoam was seen through Fourier Transform Infrared Spectroscopy (FTIR) and showed that biofoam is hydrophilic which binds to water so that it is easily degraded by soil. Thermal characteristics were tested through Differential Scanning Calorimetry (DSC) and showed a melting point of 410.68oC at 45 g of fiber and 5% NaOH and a melting point of 410.86oC at 55 g fiber and 5% NaOH. Thermal stability was analyzed through Thermal Gravimetry Analysis (TGA) and the most thermally stable biofoam was biofoam with 45 g of corn husk fiber and 5% NaOH. The surface morphology test using a Scanning Electron Microscope (SEM) showed that the morphological structure of the corn husk fiber biofoam was uneven and there were bubbles on the surface of the biofoam. The water absorption test shows results between 5.72 – 14.43%. The lowest density test for biofoam is using 55 g fiber weight and 3% NaOH concentration, while the highest density is 60 g fiber weight and 9% NaOH concentration. The results of the biodegradability test showed that the biofoam decomposes completely within 40-45 days, the soil moisture factor greatly affects the rate of biodegradability.

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