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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Pengabdian UntukMu NegeRI Al-Kimia Jurnal Ilmiah Teknik Kimia Jurnal Surya Teknika
Viona Aulia Rahmi
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Religion Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Social Sciences

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Pengendalian Korosi Dengan Menggunakan Daun Nanas Sebagai Green Inhibitor Pada Baja ASTM A36 Viona Aulia Rahmi; Komalasari Komalasari; Rozanna Sri Irianty
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Corrosion is a decline quality of a metal because of chemical reaction a metal with its environment. The use of inhibitors is one way of corrosion control on metals, especially on the inside of the pipe. Pineapple leaf extract can be used as a green inhibitor. This study aims to utilize pineapple leaf extract as a green inhibitor about concentration of the inhibitor in controlling the corrosion rate by varying the time of the metal immersion. Extraction is done with a ratio of ethanol: distilled water, which is 1: 4. Research variations were corrosive media (0.1 M H2SO4), inhibitor concentrations (0, 2 gr/L) and immersion time (16, 32 and 48 hours). The method used is the weight loss method. The lowest corrosion rate in 0.1M H2SO4 solution is a concentration of 2 gr/L and a 48 hour immersion time of 20,686 mpy. The highest inhibitor efficiency in 0.1M H2SO4 solution concentration of 2 gr/L and time immersion for 48 hours amounted to 85.48%. It can be concluded that more inhibitors on corrosive media are able to produce low corrosion rates with high inhibition efficiency.Keywords: corrosion rate, inhibition efficiency, inhibitor, pineapple leaf
Treatment Palm Oil Mill Effluent (POME) Using Continuous Column Plate Electric Reactor Susanto, Reno; Aulia Rahmi , Viona; Widyaningsih , Dwi
Al-Kimia Vol 10 No 2 (2022): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v10i2.25646

Abstract

Palm oil mills produce palm oil mill effluent (POME) which contains various dissolved organic compounds in the form of short fibers, hemicellulose, and their derivatives, protein, free fatty acids, a mixture of minerals and organic pigments such as anthocyanins, carotene, polyphenols, lignin and tannins. Organic compounds in this waste will cause problems such as increasing the value of TSS, TDS, and COD which can be a crucial environment for processing liquid waste in palm oil mills. One possible method to reduce the content of TSS, TDS, and COD is the electrocoagulation method. This study aims to determine the effect of variable flowrate, voltage, and distance between plates in the electrocoagulation process with a plate column electric reactor, and determine the optimum conditions for flowrate, voltage, and distance between plates. Optimum conditions are obtained at fflowrate3 L/min, 28 V voltage, 2 cm distance between plates with percent removal of TSS, TDS, and COD, respectively 49.30%; 49.40%; 60.30%.
Perencanaan Penjadwalan Perawatan Alat Berat Mobile Crane Menggunakan Metode CPM (Studi Kasus : PT. Menara Riau Perkasa) Rozar Rayendra; Dedi Dermawan; Muhammad Qurthuby; Faradila Ananda Yul; Viona Aulia Rahmi; Indria Olyvhia Sinatra
JURNAL SURYA TEKNIKA Vol. 11 No. 2 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i2.8262

Abstract

PT Menara Riau Perkasa is a company engaged in the rental of heavy equipment. The maintenance process unscheduled mobile crane heavy equipment is quite long within 5 days including overtime and rest hours and 1 day is inspection. Ordering heavy equipment for 6 days so that the company is often in a hurry for the maintenance process. Therefore, optimization of mobile crane maintenance is carried out by measuring the duration of each maintenance process using the Critical Path Method (CPM). This method is used to identify tasks needed in completing the project and determine scheduling flexibility. This method can complete the maintenance process with an effective time of 2.8 days with 8 hours of operation without rest hours and inspection for 1 day so that the total completion is 3.8 days. The use of the CPM method can reduce the maintenance process time because there are 2 main maintenance process activities that can be done at once with limited leeway time for the battery water process and hydraulic repairs.
Pemanfaatan Tulang Ikan Patin (Pangasius sp.) sebagai Adsorben untuk Penjernihan Air Gambut Ermal, Dini Aulia Sari; Yayan Satria; Lisa Legawati; Cici Maarasyid; Israyandi, Israyandi; Dwi Annisa Fithry; Viona Aulia Rahmi; Delvina Sari
JURNAL SURYA TEKNIKA Vol. 11 No. 2 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i2.8331

Abstract

Peat water is raw water which is used as a source of clean water by the people of Pekanbaru. However, after testing according to the Regulation of the Minister of Health of the Republic of Indonesia for clean water standards No. 416/MENKES/PER/IX/1990 the results of measuring the color and turbidity value of peat water are above the quality standards, namely 219 TCU and 15.1 NTU. This value is very far from the color and turbidity quality standards with respective concentrations of 15 TCU and 5 NTU. Therefore, in this research, an adsorption process was carried out using an adsorbent from Patin bone waste (Pangasius sp.) typical of Riau province by utilizing a physical activation process to open pores and help facilitate absorption. The variable used in this research were adsorbent mass and stirring speed. For adsorbent mass there was a variation of 0.1; 0.3; 0.5; and 0.7 grams while the stirring speed was 50, 100, and 150 rpm with a stirring time of 120 minutes and each sample had a particle size of 100 mesh. The results of this adsorption process obtain the best efficiency value at Patin bone mass of 0.7 grams with a stirring speed of 100 rpm. The color reduction efficiency reached 96.35%, namely 8 TCU, while the turbidity reduction efficiency at Patin bone mass of 0.7 grams with a stirring speed of 100 rpm reached 92.72%, namely 1.1 NTU.
Studi Literatur: Pengembangan Superkapasitor Berdasarkan Jenis Elektrolit untuk Kinerja yang Lebih Baik : Studi Literatur Rahmi, Viona Aulia; Ermal, Dini Aulia Sari; Fithry, Dwi Annisa; Israyandi , Israyandi; Maarasyid, Cici; Febiandini, Vriska; Dictojhoda, Cakra; Nezer, Eben; Edelina, Nabila Febri; Lestiana, Eka
JURNAL SURYA TEKNIKA Vol. 12 No. 1 (2025): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v12i1.9287

Abstract

Supercapacitors are increasingly developing energy storage devices because they have advantages over conventional batteries and capacitors, such as high power density and long cycle life. Electrolytes are solutions that contain ions and function as electrically conductive media. In chemistry, electrolytes usually consist of acid, base, or salt solutions. The electrolyte used in supercapacitors plays a crucial role in achieving the desired power and energy density. In general, electrolytes are divided into two types based on their phase form, namely liquid and solid or gel electrolytes. Liquid electrolytes can be acids, bases or salts. While gel electrolytes are electrolytes that are denser in nature so that they can reduce leakage.
Menciptakan Desa Tangguh Lingkungan dari Strategi Sistem Pengelolaan Sampah Terstruktur dan Berkelanjutan di Dusun Sungai Bangkar Rozar Rayendra; Satriardi; Viona Aulia Rahmi; Denur; Dedi Dermawan; Hendri Ali Ardi; Zulkifli
Jurnal Pengabdian UntukMu NegeRI Vol. 9 No. 2 (2025): Pengabdian Untuk Mu negeRI
Publisher : LPPM UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jpumri.v9i2.9367

Abstract

Seiring pertambahan populasi dan perkembangan industri sejalan lurus dengan kebutuhan primer yang harus dipenuhi dalam suatu keluarga yang menyebabkan pengaruh terhadap limbah sampah di Dusun Sungai Bangkar Kelurahan Pangkalan Kasai. Sistem pengelolaan sampah desa yang kurang terkoordinasi dengan baik menyebabkan terjadinya penumpukan sampah. Penumpukkan sampah yang tidak terkendali menyebabkan dampak buruk terhadap pencemaran lingkungan dan kesehatan warga sekitar. Implementasi strategi pengelolaan sampah menjadi usulan program berbasis kolaborasi antar komunitas warga dan pemerintah setempat. Usulan program diawali dengan pemisahan sampah organik dan anorganik. Kemudian, sampah organik dijadikan pupuk kompos cair yang berguna untuk memberikan nutrisi pada tanaman dan sampah anorganik dijadikan paving block berguna untuk memberikan solusi konkrit untuk dijadikan jalan menutupi pasir bahkan dapat dijadikan mata pencaharian yang baru untuk warga sekitar yang berdampak pada peningkatan pendapatan asli daerah. Usulan program pengelolaan sampah ini terbukti efektif dalam mengurangi jumlah sampah dengan aspek kesadaran masyarakat dan dukungan pemerintah setempat dalam meningkatkan kualitas lingkungan yang bersih, sehat dan berkelanjutan sehingga menjadikan desa tangguh lingkungan.
Mengenal Lebih Dalam Mengenai Minyak Atsiri pada SMKN 5 Dumai Rahmi, Viona Aulia; Dini Aulia Sari Ermal; Dwi Annisa Fithry; Israyandi; Cici Maarasyid
Jurnal Pengabdian UntukMu NegeRI Vol. 9 No. 2 (2025): Pengabdian Untuk Mu negeRI
Publisher : LPPM UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jpumri.v9i2.9280

Abstract

Minyak atsiri merupakan campuran senyawa organik yang dihasilkan dari berbagai bagian tumbuhan, seperti daun, bunga, batang, akar, dan biji. Minyak ini memiliki sifat khas, seperti mudah menguap, beraroma kuat, dan tidak larut dalam air, tetapi larut dalam pelarut organik. Proses ekstraksi minyak atsiri dilakukan melalui berbagai metode, di antaranya distilasi uap, ekstraksi pelarut organik, dan cold pressing. Distilasi uap merupakan metode yang paling umum digunakan, di mana uap panas diarahkan melalui bahan tumbuhan untuk menguapkan minyak, yang kemudian dikondensasikan dan dipisahkan dari air. Pemilihan metode bergantung pada karakteristik bahan baku dan produk akhir yang diinginkan. Pengabdian masyarakat dengan tema "Mengenal Lebih Dalam Tentang Minyak Atsiri" dilaksanakan di SMKN 5 Dumai untuk memberikan edukasi dan pelatihan teknis kepada siswa terkait proses produksi minyak atsiri, mulai dari persiapan bahan baku, teknik distilasi, hingga analisis kualitas produk. Siswa diperkenalkan pada alat-alat produksi seperti alat distilasi uap sederhana, prinsip kerja kondensor, serta metode pemisahan minyak dari distilat. Selain itu, dijelaskan pula aspek penting dalam pengendalian proses, seperti suhu, tekanan, dan waktu distilasi, untuk mendapatkan hasil yang optimal dan sesuai dengan standar industri.
Sintesis PAN-co-PMMA sebagai Compatibilizer pada Pencampuran Natural Rubber dan Nitrile Butadiene Rubber:Aplikasi dalam Pencampuran Karet Perapat Megawati Fratiwi; Viona Aulia Rahmi; Sindi Wahyu Pratiwi; Maya Revanola Zainida; Rofiqoh Nur Rohmah
Jurnal Ilmiah Teknik Kimia Vol. 10 No. 1 (2026): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v10i1.55055

Abstract

Natural rubber (NR) and Nitrile Butadiene Rubber (NBR) exhibit poor miscibility due to their differences in their solubility parameters. To improve compatibility, a PAN-co-PMMA compatibilizer was synthesized by copolymerizing acrylonitrile (AN) and methyl methacrylate (MMA) with potassium persulfate (K2S2O8) as the initiator. This study investigates the influence of initiator concentration on the characteristics of PAN-co-PMMA and evaluates the mechanical performance of NR/NBR blends incorporating the compatibilizer for rubber seal applications. PAN-co-PMMA was synthesized using a water-ethanol co-solvent at 65°C for 3 hours with a stirring speed of 400 rpm, using initiator concentrations of 1, 2, 3, dan 4 %wt and an AN: MMA ratio of 90:10 (%wt). The drying was conducted at 100°C for 3 hours. IR analysis confirmed successful copolymerization through the appearance of characteristic C≡N and C=O absorption bands. The addition of PAN-co-PMMA reduced curing time and significantly enhanced the tensile strength of the NR/NBR blends.
Co-Authors Cici Maarasyid Dedi Dermawan Dedi Dermawan, Dedi Delvina Sari Denur Dictojhoda, Cakra Dini Aulia Sari Ermal Dwi Annisa Fithry Edelina, Nabila Febri Faradila Ananda Yul, Faradila Ananda Febiandini, Vriska Fithry, Dwi Annisa Hendri Ali Ardi, Hendri Ali Indria Olyvhia Sinatra Israyandi Israyandi Komalasari Komalasari Lestiana, Eka Lisa Legawati Maya Revanola Zainida Megawati Fratiwi Muhammad Qurthuby Nezer, Eben Rofiqoh Nur Rohmah Rozanna Sri Irianty Satriardi Sindi Wahyu Pratiwi SUSANTO, RENO Widyaningsih , Dwi Yayan Satria Zulkifli