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All Journal ALCHEMY Jurnal Penelitian Kimia Jurnal Serambi Engineering Jurnal Teknik Kimia USU
Zuhra
Departemen Teknik Kimia Universitas Syiah Kuala (USK)
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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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

Abstract

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.
Pemanfaatan Limbah Kertas dan Sekam Padi Sebagai Filler Papan Partikel dengan Menggunakan Limbah Botol Plastik dan Urea Formaldehida Sebagai Perekat Devita Ramadina; Maizatul Hafiza; Zuhra Zuhra; Fachrul Razi
Jurnal Serambi Engineering Vol 7, No 2 (2022): April 2022
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v7i2.4083

Abstract

Keterbatasan bahan baku kayu merupakan permasalahan yang kini dialami oleh pengusaha furniture dikarenakan pemanfaatan kayu yang tidak seimbang dengan kecepatan pembangunan. Solusi dari permasalahan diatas yaitu mencoba untuk memanfaatkan limbah biomassa menjadi papan partikel sebagai alternatif kayu. Tujuan penelitian ini adalah pembuatan papan partikel dengan memanfaatkan limbah botol plastik sebagai matriks, limbah kertas dan sekam padi sebagai filler dan urea formaldehida sebagai resin. Variabel yang digunakan pada pembuatan papan partikel yaitu persentase berat sekam padi terhadap limbah kertas sebesar 30%:0%; 20%:10%; 15%:15%; 10%:20% dan 0%:30% (w/w) yang diberi kode secara berturut-turut adalah A1, A2, A3, A4, dan A5. Papan partikel dibuat dengan pengepresan panas pada tekanan 25 kg/cm2 dan temperatur 100°C selama 15 menit. Selanjutnya papan partikel dikeringkan selama 2 minggu. Berdasarkan hasil penelitian bahwa sampel A3 telah memenuhi sifat analisis fisik berdasarkan SNI 03-2105-2006 yaitu memiliki nilai kerapatan, kadar air, dan pengembangan tebal berturut-turut sebesar 0,78 g/cm3, 5,54%, dan 7,2%. Namun, belum memenuhi sifat mekanik berdasarkan SNI.
Sintesis dan Karakterisasi Abu Kulit Alpukat sebagai Katalis Proses Transesterifikasi Minyak Goreng Bekas menjadi Biodiesel Azif Afandi; Lindia Riani; Yanna Syamsuddin; Zuhra Zuhra
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.v7i1.3924

Abstract

Biodiesel is synthesized through a transesterification reaction with the help of a catalyst and generally uses a homogeneous catalyst. Heterogeneous catalysts can be synthesized from waste biomass such as avocado peel through a calcination. The purpose of this study was to examine the effect of variations in calcination temperature (550, 650, and 750oC) on the performance of the catalyst for biodiesel production and to analyze the effect of differences in the amount of catalyst (4, 6, 8, and 10% by weight of oil) used in the transesterification process on biodiesel yield. The catalysts were characterized by XRD, SEM-EDX, and FTIR. The results of the characterization of the catalyst showed that the dominant active phase of the catalyst was potassium (K). The highest biodiesel yield was obtained when using avocado peel ash as a catalyst which was calcined at a temperature of 650oC and using 6% catalyst by weight of oil. In the transesterification reaction the composition of the biodiesel product was analyzed using GC-MS and resulted that the palmitic acid was the most abundant composition in biodiesel. The biodiesel products produced were characterized for its density, viscosity, and acid number and have met the standard of SNI 7182:2015.
PENURUNAN KADAR LOGAM KADMIUM MENGGUNAKAN ADSORBEN NANO ZEOLIT ALAM ACEH Cut Raziah; Zerlinda Putri; Atika Rahmi Lubis; Sofyana; Zuhra; Suhendrayatna; Sri Mulyati
Jurnal Teknik Kimia USU Vol. 6 No. 1 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (304.913 KB) | DOI: 10.32734/jtk.v6i1.1557

Abstract

The presence of Cadmium (Cd) in groundwater is an issue that needs serious handling as it causes problems to human health. The removal of Cadmium (Cd) can be done by various methods such as adsorption, oxidation, filtration, and many more. In this study, the method used was adsorption using Aceh natural zeolite. This process was expected to reduce Cd metal as effectively as possible. The adsorption was conducted by varying contact time, adsorbent dosage, pH and initial concentration of Cd metal. The crystallized Aceh natural zeolite was characterized by X-Ray Fluorescence (XRF) with Si/Al zeolite ratio of 4.36 %. The concentration of Cadmium in water was analyzed by means of Atomic Adsorption Spectrophotometer (AAS) standard AA 630. The results showed that the adsorption of cadmium in water solution by Aceh natural zeolite occurred according to the Freundlich adsorption model. While the adsorption kinetic from the process was found to be a pseudo second order with k2 value of 1.53.
Co-Authors Atika Rahmi Lubis Azif Afandi Cut Meurah Rosnelly Cut Raziah Devi Rahmanda Devita Ramadina Fachrul Razi Lindia Riani Maizatul Hafiza Meuthia Busthan Mirna Rahmah Lubis Mukramah Yusuf Mulyati, Sri Rina Hazliani Sofyana, Sofyana Sri Mulyati Suhendrayatna Suraiya Kamaruzzaman Syawaliah Muchtar Umi Fathanah Zerlinda Putri