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All Journal Komunikasi Fisika Indonesia Jurnal Fisika Unand BULETIN FISIKA JOURNAL ONLINE OF PHYSICS ZERO : Jurnal Sains, Matematika dan Terapan Jurnal Redoks Zero : Jurnal Sains, Matematika, dan Terapan Fisitek : Jurnal Ilmu Fisika dan Teknologi Jurnal Kumparan Fisika Jurnal Ilmu dan Inovasi Fisika
Jumiati, Ety
Universitas Islam Negeri Sumatera Utara
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics

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Penurunan Kadar Mn Air Sumur Bor Desa Tembung dengan Filtrasi Bahan Karbon Aktif Ampas Teh, Zeolit, Pasir Silika dan Kerikil Ety Jumiati; Nazaruddin Nasution; Dika Prananda
BULETIN FISIKA Vol 24 No 2 (2023): BULETIN FISIKA August Edition
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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Abstract

Research has been carried out to reduce Mn levels in Tembung village bore wells by filtering with tea waste activated carbon, zeolite, silica sand and gravel, to find out how the quality of bore well water after filtering using activated carbon from tea dregs, silica sand zeolite, and gravel. The composition variations of tea dregs activated carbon, zeolite, silica sand and gravel used are (A) 20 cm activated carbon: 15 cm zeolite: 15 cm silica sand: 10 cm gravel, (B) 15 cm zeolite: 15 cm silica sand: 10 cm gravel: 20 cm activated carbon, (C) 15 cm silica sand: 10 cm gravel: 20 cm activated carbon: 15 cm zeolite, and (D) 10 cm gravel: 20 cm activated carbon: zeolite 15 cm: 15 cm silica sand. The results of testing of bore well water after filtering with activated carbon tea, zeolite, silica sand and gravel with variations in the composition of samples A, B, C and D have met the clean water quality standard based on PERMENKES RI No. 32 of 2017. Based on the four variations in the composition of the filter material, the optimum variation in the raw material mixing composition was obtained with the variation in the composition of sample C with Mn content of 0.011 mg/L.
ANALISIS SIFAT MEKANIK PLASTIK BIODEGRADABLE PATI BIJI ALPUKAT DAN SELULOSA SEKAM PADI Ety Jumiati; Miftahul Husnah; Sunny Nafisah
Komunikasi Fisika Indonesia Vol 20, No 1 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.1.69-74

Abstract

Biodegradable plastics have been investigated using avocado seed starch, rice husk cellulose, chitosan, and glycerol in order to determine the mechanical characteristics of biodegradable plastics. Variations in the composition of avocado seed starch and rice husk cellulose in each sample A (100% : 0%), B (87.5% : 12.5%), C (75% : 25%), D (62.5% : 37.5%), and E (50% : 50%). The process of making biodegradable plastic is carried out using a material mixing process using a magnetic stirrer and a hot plate at a maintained temperature of  ± 70°C − 80°C and dried in an oven. Mechanical tests carried out include tensile strength, elongation, and modulus of elasticity tests. The results of the mechanical characterization test for the optimal biodegradable plastic are found in sample E (50% : 50%) with a tensile strength value of 20.6123 MPa and an elastic modulus of  353.7985 MPa which meets the ASTM D882-12 standard.
ANALISIS STRUKTUR KARAKTERISASI XRD DAN SEM PADA REDUCED GRAPHENE OXIDE (rGO) LIMBAH BAN Sandi Tri Febriani; Ety Jumiati; Miftahul Husnah
Komunikasi Fisika Indonesia Vol 20, No 1 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.1.49-54

Abstract

Research has been carried out using waste tires as the basic material for reduced graphene oxide (rGO). This research has been successfully synthesized using waste tire smoke with combustion and microwave assisted methods as a faster, easier, and safer synthesis process. The characterizations used in this research are X-ray diffraction (XRD) and scanning electron microscope (SEM). The powder is obtained through the process of capturing smoke from burning waste tires manually at a temperaturre of 300°C for 3 hours. Then it was reduced using microwave heating with variations in heating time of 20, 25, and 30 minutes. The results of the XRD characterization data showed a diffraction peak (002) peak at 2θ = 25° and a diffraction peak (101) peak 2θ = 43.9° which identified rGO and the results of the SEM characterization test obtained that the surface morfology formed a thin sheet.
PENGARUH GELOMBANG MIKRO DAN SULFUR SEBAGAI AGEN PASIVASI TERHADAP SPEKTRUM ABSORBANSI KARBON DOTS BERBASIS BAN BEKAS Ananda Tira Septiana Sari; Ety Jumiati; Miftahul Husnah
Komunikasi Fisika Indonesia Vol 20, No 2 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.2.147-152

Abstract

Used tires that are not used are usually thrown away and cause damage and environmental pollution. Information on the use of used tires is still limited, used tires are usually used in the synthesis of nanomaterials such as in the field of nanotechnology. This research was conducted to determine whether carbon dots can be synthesized from used car tires, sulfur can be used as a passivation agent in the synthesis of carbon dots, and to determine the wave absorption and fluorescence of carbon dots synthesized purely and with the addition of a passivation agent.Sulfur was used as a passivation agent with a carbon and sulfur ratio of 1:1. Microwave time variations were used 30, 35, and 40 minutes. The UV-Vis characterization of carbon dots showed a higher absorbance with variations in the length of microwave time and the addition of passivation agents. Luminance analysis with UV lamp obtained a brighter glow on karbon dots with the addition of a passivation agent.
Karakterisasi Sifat Fisis dan Mikrostruktur Papan Gipsum dengan Variasi Komposisi Lateks Ety Jumiati; Abdul Halim Daulay; Nur'aini Fadillah
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 5, No 2 (2021)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (471.667 KB) | DOI: 10.24198/jiif.v5i2.34493

Abstract

Abstrak. Papan gipsum merupakan salah satu produk lanjutan dari material gipsum dengan campuran serat/fiber  atau bahan lainnya. Papan Gipsum memiliki kelemahan pada sifat fisisnya yang mudah menyerap air. Maka dari itu, perlu adanya inovasi dalam pembuatan papan gipsum yang akan menghasilkan mutu yang lebih baik lagi. Pembuatan papan gipsum dapat memanfaatkan bahan limbah seperti tempurug kelapa dan sekam padi serta lateks sebagai perekatnya. Pencampuran bahan papan gipsum meliputi: gipsum, tempurung kelapa, dan sekam padi yang digunakan yaitu 70%, 15%, 15% dengan variasi lateks 10%, 12%, 14%, 16%, 18% dengan FAS 0,5 serta pengeringan selama 28 hari. Dengan parameter uji sifat fisis meliputi: kerapatan dan pengembangan tebal, serta dilakukan pengujian mikrostruktur untuk mengetahui morfologi sampel papan gipsum. Analisis sifat fisis papan gipsum diperoleh hasil yang optimal yaitu pada sampel A dengan variasi komposisi lateks 10% didapatkan nilai kerapatan sebesar 1,35 g/cm3, dan pengembangan tebal sebesar 5,03% yang memenuhi Standar SNI 01-4449-2006. Sedangkan mikrostruktur menghasilkan gambar morfologi yang menunjukkan homogenitas, terbentuk aglomerasi partikel, dan zat pengotor. Kata Kunci: lateks, papan gipsum, sekam padi, sifat fisis dan tempurung kelapa Abstract. Gypsum board is one of the advanced products of gypsum material with a mixture of fiber/fiber or other materials. Gypsum board has a weakness in its physical properties that easily absorb water. Therefore, there is a need for innovation in the manufacture of gypsum boards that will produce even better quality. The manufacture of gypsum board can utilize waste materials such as coconut shells and rice husks and latex as adhesives. The mixture of gypsum board materials including: gypsum, coconut shell, and rice husk used was 70%, 15%, 15% with latex variation 10%, 12%, 14%, 16%, 18% with FAS 0.5 and drying for 28 days. The parameters of the physical properties test include: density and thickness expansion, as well as microstructural testing to determine the morphology of the gypsum board sample. Analysis of the physical properties of gypsum board obtained optimal results, namely in sample A with a variation of 10% latex composition, the density value was 1.35 g/cm3, and the thickness expansion was 5.03% which met the SNI Standard 01-4449-2006. While the microstructure produces morphological images that show homogeneity, particle agglomeration forms, and impurities.Keywords: latex, gypsum board, rice husk, physical properties and coconut shell
PENGARUH PENAMBAHAN KONSENTRASI NaCl TERHADAP NILAI KELUARAN LISTRIK BIOBATERAI SARI BUAH MENGKUDU Ety Jumiati; Miftahul Husnah; Riadina Siregar
Komunikasi Fisika Indonesia Vol 20, No 2 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.2.199-204

Abstract

Biobattery is a tool that can generate electrical energy from nature that is environmentally friendly, such as noni juice with the addition of NaCl concentration (0%, 10%, 20%). The purpose of this study (i) to determine the pH of the noni juice (ii) for the electrical conductivity of the noni juice (iii) to determine the electrical voltage of the noni juice (iv) to determine the electric current of the noni juice. This study used the galvanic cell method using copper (Cu) and zinc (Zn) electrodes. Based on the results of research conducted on noni juice, the highest value was obtained for noni juice with the addition of 20% NaCl concentration with pH: 2.5, Electrical conductivity: 4915 mS/cm3, voltage: 2.32 V, electric current: 3.12 mA, electric power: 7.23 mW. It can be stated that the lower the pH value, the higher the concentration of NaCl used, the greater the voltage, current, and electrical power obtained. In this study, the ability of noni juice to turn on a white LED light for 2 hours can light up with a stable voltage drop.
Pengaruh Penambahan Serbuk Pati Jagung dan Kitosan Terhadap Mutu Sifat Fisis Bioplastik Kiki Noviansyah; Ety Jumiati; Ridwan Yusuf Lubis
Jurnal Fisika Unand Vol 12, No 3 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.12.3.465-470.2023

Abstract

Bioplastik polimer dapat terurai oleh aktivitas mikroorganisme di dalam tanah. Pati jagung, kitosan dan plasticizer sorbitol dapat dimanfaatkan sebagai bahan pembuatan bioplastik. Penelitian ini bertujuan untuk mengetahui pengaruh terhadap mutu sifat fisis bioplastik. Variasi campuran pati jagung dan kitosan (A) 40% : 60%, (B) 50% : 50% dan (C) 60% : 40% dengan plasticizer sorbitol 2 ml. Dengan uji ketebalan, biodegradasi, dan daya serap air. Hasil data pengujian ketebalan sampel A sebesar 0,24 mm, sampel B sebesar 0,17 mm dan sampel C sebesar 0,16 mm. Nilai biodegradasi sampel A sebesar 33,3%, sampel B sebesar 50% dan Sampel C sebesar 80% dan daya serap air sampel A sebesar 25%, sampel B sebesar 30% dan sampel C sebesar 50%. Nilai biodegradasi sudah memenuhi standar SNI 7188.7:2016 pada sampel C. Sedangkan daya serap air belum memenuhi standar ASTM D570-98 pada semua sampel. 
ANALISIS SIFAT FISIS PEMBUATAN KERTAS DARI SERAT DAUN NANAS DAN KULIT DURIAN Bayu Anugrah KS; Ety Jumiati
Jurnal Kumparan Fisika Vol. 6 No. 2: Agustus 2023
Publisher : Unib Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/jkf.6.2.125-132

Abstract

ABSTRAK   Tujuan dari penelitian ini adalah untuk mengetahui sifat fisis dari kertas yang dihasilkan. Metode penelitian yang digunakan adalah metode eksperimen dengan tujuan untuk mencari alternatif bahan baku kertas. Terdapat variasi persentase berat dalam campuran antara daun nanas dan kulit durian, yaitu 40%:60%, 50%:50%, dan 60%:40%. Daun nanas dan kulit durian dimasak dalam larutan NaOH 3% pada suhu 90℃, kemudian dilakukan proses pemutihan dengan larutan H2O2 10% lalu disaring dan dikeringkan. Setelah kering, pulp dicampur dengan komposisi yang telah dirancang menggunakan blender dan dicetak menggunakan cetakan kertas. Hasil pengujian sifat fisis kertas menunjukkan nilai gramatur tertinggi yaitu 90 gram/m2 yaitu pada variasi sampel 40%:60% dan nilai terendah yaitu 79 gram/m2 pada variasi sampel 60%:40%. Untuk pengujian bulk nilai tertinggi yaitu 1,44 cm3/gram pada variasi sampel 60%:40% dan nilai terendah yaitu 1,22 cm3/gram pada variasi sampel 40%:60%. Dari nilai tersebut sudah memenuhi nilai SNI 7274:2008 untuk menjadi mutu kertas cetak A.   Kata  kunci: kertas, selulosa, daun nanas, kulit durian.   ABSTRACT   The purpose of this research is to determine the physical properties of the paper produced. The research method used is an experimental method with the aim of finding alternative raw materials for paper. There are variations in the percentage of weight in the mixture between pineapple leaves and durian skin, namely 40%:60%, 50%:50%, and 60%:40%. Pineapple leaves and durian skin are cooked in 3% NaOH solution at 90℃, then a bleaching process is carried out with 10% H2O2 solution and then filtered and dried. After drying, the pulp is mixed with the composition that has been designed using a blender and printed using a paper mold. The results of testing the physical properties of the paper showed that the highest grammage value was 90 gram/m2 at the sample variation of 40%:60% and the lowest value was 79 gram/m2 at the sample variation of 60%:40%. For bulk testing, the highest value is 1,44 cm3/gram for a sample variation of 60%:40% and the lowest value is 1,22 cm3/gram for a sample variation of 40%:60%. From this value, it meets the value of SNI 7274: 2008 to become A printing paper.   Keywords: paper, celluloce, pineapple leaves, durian skin.
ANALISIS PENGARUH PENAMBAHAN DAUN JAGUNG PADA KERAMIK BERPORI BERBAHAN DASAR TANAH LEMPUNG Ayu Amalya Rahma; Ety Jumiati; Ridwan Yusuf Lubis
Indonesian Physics Communication Vol 20, No 3 (2023): IN PROGRESS
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.3.%p

Abstract

Corn leaves are agricultural waste that contains silica compounds and functions to reduce cracks in the drying of porous ceramics. Variations in the composition of clay and corn leaf ash are: 100% : 0%, 90% : 10%, 80% : 20% and 70% : 30%. The manufacture of porous ceramics uses a dry pressing technique with a presure of 4 tons for 10 minutes, using a 3 cm x 3 cm x 3 cm mold, fired using a furnace at 900 0C for 2 hours and allowed to cool for 24 hours. The characterization used namely density, porosity, water absorption, hardness and compressive strength. The result of the charaterization of porous ceramics is: density 1,20-1,79 g/cm3, porosity 29,75-61.03%, water absorption 16,60-50,80%, hardness 41,41-187,58 MPa and compressive strength 3,51-84,49 MPa. The more addition of corn leaf ash caused an increase in porosity and to water absorption and decrease in density, hardness and compressive strength.
PENGARUH PENAMBAHAN ADITIF DAUN JAGUNG (Zea Mays) TERHADAP SIFAT FISIS DAN MEKANIK KERAMIK ALUMINA Ayu Dwi Retno; Ety Jumiati; Ridwan Yusuf Lubis
Indonesian Physics Communication Vol 20, No 3 (2023): IN PROGRESS
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.3.%p

Abstract

Research has been carried out on the manufacture of alumina ceramics. This study aims to determine the effect of the addition of corn leaf additives on the physical and mechanical properties of alumina ceramics. Variations in the composition of alumina and corn leaf ash are: 95% : 5%, 90% : 10% and 85% : 15%. The process of making these ceramics uses the die prissing method, and uses variations in firing temperature, namely 1300°C  and 1400°C for 1 hour, and is printed using a 3 cm x 3 cm x 1 cm mold. the characterization of the tests carried out included physical properties, namely density and porosity and mechanical properties, namely hardness.  The  results of the data obtained from  measuring  the  density  at 1300°C are 2.11-2.18 g/cm3 and at 1400°C they are2.13-2.20 g/cm3, the porosity at 1300°C is 25.82 % -  27.25% and 1400°C temperature of 25.36% - 26.89%, and 1300°C temperature hardness test of 59,641 Mpa-67,055 MPa and 1400°C° temperature of 61,926 MPa – 70,958 MPa.
Co-Authors Abdul Halim Daulay Afifah Azmi Aiysah Hannum Pulungan Ananda Tira Septiana Sari asnitha aritonang Ayu Amalya Rahma Ayu Dwi Retno Bayu Anugrah KS Dika Prananda endang sagita ritonga Ervina Putri Wulandari Ismail Husein, Ismail Kiki Noviansyah Masthura, Masthura Meutia Nanda Miftahul Husna Miftahul Husnah Nanda Putri Afrilda Nazaruddin Nasution Nita Zahara Nasution Nujulia Subuharni Nur'aini Fadillah Nurlaila Sari Harahap Putri Indah Sari Ratni Sirait Riadina Siregar Ridwan Yusuf Lubis Ridwan Yusuf Lubis Ririn sagita Aruan Rizki Qorina Sandi Tri Febriani Siti Munawaroh Sunny Nafisah ufik eliati tumanggor