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All Journal Komunikasi Fisika Indonesia Jurnal Teknosains Jurnal Fisika Unand Jurnal Rekayasa Material, Manufaktur & Energi Fisitek : Jurnal Ilmu Fisika dan Teknologi JURNAL PENDIDIKAN TAMBUSAI JOURNAL OF SCIENCE AND SOCIAL RESEARCH Saintifik : Jurnal Matematika, Sains, dan Pembelajarannya Jurnal Elemen Jurnal Kumparan Fisika Pascal: Journal of Physics and Science Learning Navigation Physics : Journal of Physics Education Mimbar Kampus Journal of Technomaterial Physics Jurnal Energi Baru dan Terbarukan CHEDS: Journal of Chemistry, Education, and Science EINSTEIN (E-JOURNAL)
Jumiati, Ety
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Pengaruh Penambahan Bulu Ayam dan Serbuk Kayu Terhadap Uji Fisis Papan Partikel Aruan, Ririn sagita; Jumiati, Ety; Husnah, Miftahul
Jurnal Fisika Unand Vol 12 No 4 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.12.4.646-650.2023

Abstract

Penelitian ini bertujuan untuk mengetahui sifat fisis papan partikel yang terbuat dari bahan serbuk kayu dan limbah bulu ayam. Variasi komposisi bulu ayam, serbuk kayu dan perekat resin epoxy berturut-turut yaitu : sampel A(5%:50%:45%), B(10%:45%:45%), dan C(15%:40%:45%). Parameter uji fisis meliputi kerapatan, kadar air dan pengembangan tebal. Hasil uji fisis papan partikel berbahan bulu ayam, serbuk kayu dan perekat resin epoxy yang optimal terdapat pada sampel C dengan nilai kerapatan 0,60 g/cm3, kadar air 7,85%, dan pengembangan tebal 10,4%. Pada penelitian ini sampel telah sesuai SNI 03-2105-2006 dan papan partikel ini masuk pada penggunaan umum (struktural).
Karakteristik Sifat Fisika dan Kimia Terhadap Pembuatan Briket Arang Kulit Salak Dengan Penambahan Perekat Getah Karet Munawaroh, Siti; Sirait, Ratni; Jumiati, Ety
Jurnal Fisika Unand Vol 13 No 3 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.3.358-364.2024

Abstract

Dilakukan penelitian pembuatan briket arang menggunakan bahan utama kulit salak dan divariasiasikan antara kulit salak dan perekat tepung tapioka yang di tambah getah karet  kulit salak yakni : sampel A (70%:30%), B (60%:40%), dan C (50%:50%), formula perekat dan air  (1:3), dan dikeringkan hingga 7 hari. Pengujian pada penelitian yakni : uji fisika dan kimia mencakup  kadar air, nilai kalor, kadar abu, kadar zat terbang juga kadar karbon. Didapatkan briket arang kulit salah yang bagus dari hasil dari pengujian fisika dan kimia yakni di sampel A (70%:30%) dengan persentaase air 4,13%, persentase kalor 4.707 Cal/g, persentase abu 6,42%, persentase zat terbang 6,27% serta persentase karbon 76,42%. Sampel briket arang sudah setara di SNI No. 01-6235-2000 jadi, briket arang bisa diaplikasikan di ruang lingkup rumah tangga.
Pemurnian Minyak Goreng Jelantah Menggunakan Karbon Aktif Tempurung Kelapa dengan Aktivasi Fisika Jumiati, Ety; Nanda, Meutia
Jurnal Fisika Unand Vol 13 No 2 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.2.254-260.2024

Abstract

Minyak goreng merupakan kebutuhan pokok yang diperlukan untuk menggoreng makanan. Dikatakan baik suatu minyak goreng bila minyak goreng berwarna bening kekuningan dan terbuat dari tumbuhan serta hewani yang diolah secara buatan. Penelitian ini bertujuan untuk memurnikan minyak goreng jelantah menggunakan karbon aktif tempurung kelapa dengan aktivasi fisika sebagai adsorben. Hasil penelitian ini memperoleh bau dan rasa normal, warna, normal, nilai kadar air: 0,06% dan nilai ALB: 0,15% yang nilainya tidak melebihi dari standar maksimum yang dipersyaratkan SNI 7709:2019
Reduction of COD and BOD Levels in Tofu Liquid Waste Processing Using the Electrocoagulation Method Suci, Suci Amanda; Masthura, Masthura; Jumiati, Ety
Journal of Technomaterial Physics Vol. 7 No. 2 (2025): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v7i2.22378

Abstract

Tofu liquid waste treatment is very important because of its high organic content and can cause environmental pollution. This research uses electrocoagulation method with cylindrical aluminum electrodes to lower Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) levels. The variation of the treatment time used is 45, 60, and 75 minutes with a voltage of 12 volts and a distance between the electrodes of 2 cm. The test results showed that the BOD concentration decreased from 816 mg/L to 57–104 mg/L (efficiency 87–93%), while COD decreased from 2696 mg/L to 78–118 mg/L (efficiency 95–97%). In addition, the pH increased from 3.44 to 6.03–6.99 so that it is close to neutral condition. All final results meet the quality standards of liquid waste according to the Regulation of the Minister of Environment and Forestry No. 5 Year 2014, as well as aluminum content according to drinking water quality standards according to Permenkes No. 492/MENKES/PER/IV/2010. Thus, electrocoagulation using cylindrical electrodes is proven to be effective, environmentally friendly, and potentially applied to small to medium-scale tofu waste treatment.
The effect of Electrode Type Differences on BOD and COD Reduction in Tofu Wastewater Treatment khofifahparawansyah, khofifah; Masturah, Masturah; Jumiati, Ety
Journal of Technomaterial Physics Vol. 7 No. 2 (2025): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v7i2.22431

Abstract

Research has been conducted aimed at testing the results of tofu liquid waste samples on the Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) parameters before and after the electrocoagulation process using Al, Cu, and Zn electrodes. This study used tofu liquid waste from Jl. Pasar V Helvetia. The BOD test results before electrocoagulation were 816 mg/L. The BOD test results after electrocoagulation with Al electrodes were 112 mg/L, Cu electrodes were 55 mg/L, and Zn electrodes were 115.2 mg/L. The COD level test results before electrocoagulation were 2696 mg/L. The COD level test results after electrocoagulation with Al electrodes were 95 mg/L, Cu electrodes were 62 mg/L, and Zn electrodes were 105 mg/L. From the electrode variations, the best results were obtained for testing the BOD and COD levels of tofu liquid waste on the Cu electrode.
The Influence of Tensile Strength Test Values on the Elongation of Eco-Friendly Paper Jumiati, Ety; Husnah, Miftahul
Journal of Technomaterial Physics Vol. 7 No. 2 (2025): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v7i2.22746

Abstract

Paper is a thin material in the form of sheets. Environmentally friendly paper is obtained from natural materials derived from discarded waste. This study aims to investigate the characteristics and the effect of elongation values on the tensile strength of the produced paper. The composition variations between taro peel and oil palm frond fibers in paper production were 30%:70% (sample A); 40%:60% (sample B); 50%:50% (sample C); 60%:40% (sample D); and 70%:30% (sample E). The pulp preparation process was carried out using the soda method, while the drying process was conducted naturally at room temperature for 12 hours. The results of the paper characterization for samples A, B, C, D, and E showed tensile strength values of 5.2570 kN/m, 6.2875 kN/m, 7.1985 kN/m, 8.8975 kN/m, and 9.5060 kN/m, respectively, while the elongation test values were 1.09%, 1.12%, 1.15%, 1.24%, and 1.52%. These values have met the requirements for printing paper grade A according to SNI 7274:2008. The results indicate that the higher the composition of oil palm frond fibers used, the greater the tensile strength and elongation values of the paper.
Pengaruh Densitas Terhadap Kuat Tekan Pada Pembuatan Paving Block Dengan Penambahan Goni Plastik Harahap, Sarah Aprilia; Masthura, Masthura; Jumiati, Ety
Rekayasa Material, Manufaktur dan Energi Vol 9, No 1: JANUARI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i1.26377

Abstract

This study aims to determine the effect of adding plastic jute on the physical and mechanical properties of paving blocks, as well as to determine the optimal mixture composition. Plastic jute is used as an additional material in the paving block mixture along with sand and cement. Three composition variations were used in this study: Sample A (1% plastic jute, 64% sand, 35% cement), Sample B (3% plastic jute, 62% sand, 35% cement), and Sample C (5% plastic jute, 60% sand, 35% cement). Tests were conducted on the density and compressive strength of the paving blocks. The test results showed that Sample A had the highest density (1886.57 kg/m³), a compressive strength of 10 Mpa. These values meet SNI standards and indicate the best quality compared to other samples. Samples B and C have lower values, especially in water absorption and compressive strength. Thus, the addition of plastic jute significantly affects the quality of paving blocks, and the most optimal composition is found in Sample A. The use of plastic jute not only improves the characteristics of paving blocks but also helps reduce plastic waste in the environment.
Peningkatan Mutu Kertas Cetak A Berbasis Kulit Talas Dan Serat Sawit Pada Sifat Fisis Sari, Devi Kumala; Jumiati, Ety; Daulay, Abdul Halim
Rekayasa Material, Manufaktur dan Energi Vol 9, No 1: JANUARI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i1.26666

Abstract

Paper is a thin material in the form of sheets that is one of the basic needs used by the community, paper is produced from the compression of fibers derived from pulp containing cellulose. This study aims to determine the characteristics of the paper produced and to determine the effect of the composition of the mixture of taro peel pulp and oil palm fruit fiber on paper quality. This study used the soda method, with variations in the weight of samples A (65%: 35%), B (45%: 55%), and C (25%: 75%). Taro peel and oil palm fruit fiber were first cooked with a 10% acetic acid solution, then bleached using a 10% H₂O₂ solution, then dried. The characterization results of the samples showed that sample C was the optimum sample with a grammage test value of 88 g/m2, a bulk test value of 1.25 cm3/g, and a SEM test value of 9,7089. This value shows that sample C has fulfilled some of the standard of SNI 7274:2008, so it can be concluded that the composition of taro peel pulp and oil palm fruit fiber produces paper with quite good quality.
PENINGKATAN NILAI UJI BULK DAN NILAI DAYA REGANG PADA MUTU KERTAS CETAK A Hayat, Lisa Fadhilah; Jumiati, Ety; Husnah, Miftahul
JOURNAL OF SCIENCE AND SOCIAL RESEARCH Vol 9, No 1 (2026): February 2026
Publisher : Smart Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54314/jssr.v9i1.5718

Abstract

Abstract: This study was conducted to determine the improvement of bulk and elongation in Printing Paper A made from cassava peel and oil palm fiber. Using an experimental method and a quantitative approach, the material composition variations were as follows: sample A (80%:20%), sample B (60%:40%), sample C (40%:60%), and sample D (20%:80%). The pulp-making process was carried out with chemical treatment using 3% NaOH and 3.5% HNO₃ solutions, followed by bleaching with 10% H₂O₂, then dried and formed into paper sheets. Characterization was conducted based on SNI 7274:2008. The bulk test results were 1.073 cm³/g for sample A, 1.088 cm³/g for sample B, 1.090 cm³/g for sample C, and 1.096 cm³/g for sample D. The elongation results were 1.589% for sample A, 0.682% for sample B, 2.800% for sample C, and 2.800% for sample D. This study shows that the higher the proportion of oil palm fiber, the more significant the contribution to the increase in bulk and elongation values of the paper. Keyword: Bulk, Cassava Peel, Elongation, Palm Fiber, Paper Abstrak: Penelitian ini dilakukan untuk menentukan peningkatan bulk dan daya regang pada kertas cetak A berbahan kulit ubi dan serat sawit. Dengan menggunakan metode eksperimen dan pendekatan kuantitatif, variasi komposisi bahan adalah sebagai berikut: sampel A (80%:20%), sampel B (60%:40%), sampel C (40%:60%), dan sampel D (20%:80%). Proses pembuatan pulp dilakukan dengan perlakuan kimia menggunakan larutan NaOH 3% dan HNO₃ 3,5%, dilanjutkan dengan pemutihan menggunakan H₂O₂ 10%, kemudian dikeringkan dan dicetak menjadi lembaran kertas. Karakterisasi dilakukan berdasarkan SNI 7274:2008. Hasil uji bulk adalah 1,073 cm3/g untuk sampel A, 1,088 cm3/g untuk sampel B, 1,090 cm3/g untuk sampel C, dan 1,096 cm3/g untuk sampel D. Hasil daya regang adalah 1,589% untuk sampel A, 0,682% untuk sampel B, 2,800% untuk sampel C, dan 2,800% untuk sampel D. Penelitian ini menunjukkan bahwa semakin tinggi peningkatan proporsi serat sawit memberikan kontribusi signifikan terhadap kenaikan nilai bulk dan daya regang kertas. Kata kunci: Bulk, Daya Regang, Kertas, Kulit Ubi, Serat Sawit
Co-Authors ., Masthura Abdul Halim Daulay Adiani Nasution, Arfa Ananda, Putri Dwi Aruan, Ririn sagita Azmi, Afifah Br Lubis, Lailatul Husna Dimas Pratama, Dimas Harahap, Nurlaila Sari Harahap, Sarah Aprilia Hayat, Lisa Fadhilah Husna Br. Lubis, Lailatul Hutauruk, Siti Aulia Khairunnisa, Umi Khairunnisa khofifahparawansyah, khofifah Lubis, Fadilah Azzahra Lubis, Ridwan Yusuf Masthura, Masthura Masturah, Masturah Miftahul Husnah Mughiroh, Hafizul Nabilah, Cinthia Farah Nanda, Meutia Nasution, Annisa Salsha Safira Nasution, Annisa Wulan Dhari Nasution, Nazaruddin Ningsih, Mulia Noviansyah, Kiki Nurfebia, Karina Pratiwi, Pebi Ajeng Rachmaini, Alya Rani Saputri Ratni Sirait, Ratni Sari, Devi Kumala Sariah, Jati Nur Silalahi, Homsiah Mayang Sari Siti Munawaroh Siti Putri Masyitah Srg, Dini Anggraini Suci, Suci Amanda Sulkha, Amalia Tambunan, Efrida Pima Sari Tiara, Finky Manda Umairoh, Ninda