Article Per Year (5 Year)
p-Index From 2020 - 2025
1.503
P-Index
This Author published in this journals
All Journal IPTEK Journal of Proceedings Series Journal of Degraded and Mining Lands Management JOURNAL ONLINE OF PHYSICS SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Jurnal Pengabdian Magister Pendidikan IPA Archipelago Engineering METIKS: Jurnal Teknik Mesin, Elektro, Informatika, Kelautan & Sains Jurnal Masyarakat Madani Indonesia
Ervina Rumpakwakra
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

Published : 8 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 8 Documents
Search

 1 
Synthesis of Composite Graphene/ Fe3O4 by Electrophoretic Deposition Using Pulse Direct Current Ervina Rumpakwakra; Hariyati Purwaningsih; Widiyastuti Widiyastuti; Heru Setyawan
IPTEK Journal of Proceedings Series No 6 (2020): 6th International Seminar on Science and Technology 2020 (ISST 2020)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2020i6.11101

Abstract

Composites Graphene/Fe3O4 have been successfully synthesized by the electrophoretic deposition method using pulse direct current (PDC) on a nickel foam substrate. In this study, we synthesized graphene and Fe3O4 separately before the two materials were composited. We synthesize graphene from coconut shell charcoal and synthesize Fe3O4 from pure iron. Graphene and Fe3O4 which have been formed, are dissolved with demineralized water as a dispersing medium so that a solution of 1.5 mg / mL is obtained which is then compiled layer by layer on the surface of the substrate with variations in deposition time of 10 to 30 minutes at room temperature. This aims to determine the effect of deposition time on the formation of graphene/Fe3O4 composites. The results showed that the use of PDC was able to precipitate graphene/Fe3O4 composites on the surface of the substrate. The use of longer deposition time, results in more graphene/Fe3O4 composites which adhere to the substrate surface. This result is also supported by XRD testing which shows the longer the deposition time, the diffraction peaks appear sharper.
ANALISIS KESTABILAN LERENG BATUAN DENGAN MENGGUNAKAN KLASIFIKASI MASSA BATUAN DI DAERAH HATIVE BESAR Micky Kololu; Marcia Violetha Rikumahu; Afifah Thohirah; Ervina Rumpakwakra
Journal Teknik Mesin, Elektro, Informatika, Kelautan dan Sains Vol 3 No 2 (2023): Jurnal Teknik Mesin, Elektro, Informatika, Kelautan & Sains
Publisher : Jurusan Teknik Mesin Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/metiks.2023.3.2.62-71

Abstract

Desa Hative Besar memiliki wilayah yang berlereng dengan formasi batuan adalah batuan vulkanik. Bagian cover batuan ini telah mengalami pelapukan sehingga dimanfaatkan oleh masyarakat untuk keperluan penambangan. Dalam melakukan kegiatan penambangan, kualitas massa batuan harus diperhatikan karena merupakan metode empiris untuk memprediksi stabilitas lereng yang diamati. Kehadiran kekar maupun retakan pada batuan akan menyebabkan ketidakstabilan pada lereng. Kestabilan lereng ditentukan dengan menggunakan klasifikasi massa batuan dengan parameter yang diambil dari nilai kuat tekan batuan, RQD, jarak antar bidang diskontinu, kondisi diskontinu, dan kondisi air tanah yang mewakili massa batuan. Penelitian yang telah dilakukan ini bertujuan untuk mengkaji kestabilan lereng batu pasir dengan menggunakan metode klasifikasi massa batuan. Hasil penelitian menunjukkan bahwa nilai Slope Mass Rating (SMR) pada formasi lereng terdistribusi sesuai tipe massa batuan yang tepat dengan nilai SMR sebesar 75,5 dan tergolong Tipe II yang menggambarkan lereng batuan stabil dan lereng berada dalam kondisi stabil. keadaan baik. Untuk nilai Rock Mass Rating (RMR) memiliki nilai sebesar 68 dan tergolong Tipe II, asalkan lereng stabil dan tidak memerlukan penyanggaan.
Edukasi Pengenalan Simbol Keselamatan Kerja Kepada Siswa SMK Negeri 2 Maluku Tengah Delpina Nggolaon; Ervina Rumpakwakra; Nikmans Hattu; Stevi Silahooy
Jurnal Masyarakat Madani Indonesia Vol. 3 No. 2 (2024): Mei
Publisher : Alesha Media Digital

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59025/js.v3i2.219

Abstract

Penguasaan simbol-simbol keselamatan kerja adalah fokus utama dalam kegiatan Pengabdian Kepada Masyarakat yang dilaksanakan oleh tim dosen dari Program Studi Teknik Kimia, Universitas Pattimura. Kegiatan ini dilakukan sebagai salah satu bentuk upaya dalam mempersiapkan siswa kelas XII SMK Negeri 2 Maluku Tengah yang akan segera menyelesaikan studi dan memasuki dunia kerja. Teridentifikasi bahwa adanya kekurangan pengetahuan diantara siswa-siswi dalam mengenal simbol-simbol keselamatan kerja. Oleh karna itu, tujuan utama dari edukasi ini adalah mengajarkan siswa cara mengidentifikasi dan memahami simbol-simbol keselamatan kerja yang sering dijumpai. Selain meningkatkan kesadaran akan pentingnya keselamatan, program ini juga bertujuan untuk mengurangi risiko kecelakaan kerja melalui pemberian pengetahuan dasar tentang penanganan alat dan bahan yang memiliki simbol khusus. Hasil dari kegiatan ini menunjukkan peningkatan pemahaman siswa mengenai simbol-simbol keselamatan kerja dan cara penanggulangan bahaya yang terjadi, seperti terlihat dari keterlibatan aktif dan antusias siswa selama sesi tanya-jawab yang berkembang menjadi diskusi yang dinamis. Ini menunjukkan bahwa mayoritas peserta dapat memahami materi dengan baik, sehingga membangun pemahaman kuat tentang pentingnya mematuhi standar keselamatan sejak dini. Dengan demikian, kegiatan ini tidak hanya menyediakan pengetahuan teoretis, tetapi juga mempersiapkan siswa secara praktis untuk meminimalisir kecelakaan kerja di masa depan sebagai calon pekerja industri
SEPARATION OF ETHANOL-WATER AZEOTROPE MIXTURES USING EXTRACTIVE DISTILLATION METHOD Muhammad Ikhsan Taipabu; Wei Wu; Karthickeyan Viswanathana; Nikmans Hattu; Ervina Rumpakwakra; Micky Kololu
ALE Proceeding Vol 6 (2023): Archipelago Engineering
Publisher : Fakultas Teknik Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ale.6.2023.198-203

Abstract

Extractive distillation is a specialized distillation process that involves adding an additional component (extractive agent or solvent/entrainer) to the mixture in order to alter the relative volatilities of the components and enable their separation, even when they form azeotropes. This technique is commonly used to separate azeotropic mixtures, such as ethanol-water azeotropes. The ethanol-water azeotrope is a well-known example, where the mixture contains around 95.6 wt% ethanol and 4.4 wt% water. Traditional distillation methods cannot separate these components efficiently due to the azeotropic behavior. However, extractive distillation offers a solution by introducing a third component (entrainer) that forms a ternary azeotrope, which has different properties compared to the binary azeotrope (ethanol-water). This study presents the effect of the operating parameters (e.g., column configuration, pressure, entrainer type) on energy consumption while the purity of ethanol is set to 99.5 wt%. Appropriate entrainers (i.e., glycerol, ethylene glycol) are chosen to extract water from methanol at different compositions. The optimum design of ethanol-water azeotrope separation is obtained by using sensitivity analysis in Aspen Plus simulation. The results indicate the trade-off between solvent and reboiler duty consumption. An advanced comparison study is recommended, including the mixing of both solvents as entrainer.
Introduction to Drinking Water Quality Standards for Communities in Poka Village, Teluk Ambon District Ervina Rumpakwakra; Nikmans Hattu; Gede Wiratma Jaya; Delpina Nggolaon; Marcia Violetha Rikumahu; Afifah Thohirah; Stevi Silahooy; Jolantje Latupeirissa; Ivonne Telussa; Samuel Simra Pada; Micky Kololu
Jurnal Pengabdian Magister Pendidikan IPA Vol 7 No 1 (2024): Januari - Maret
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v7i1.6564

Abstract

The quality of clean water used has been a top priority to maintain health and fulfill daily needs. There are many sources of clean water, including well water, bottled water, gallon water and PDAM water. The use of clean water in Poka Village still uses well water and gallon water, so there is concern among the community regarding the cleanliness and quality of the water. Therefore, this service is carried out to help answer public anxiety by introducing Drinking Water Quality Standards that have been determined in the Republic of Indonesia Minister of Health Regulation No. 492/MENKES/PER/IV/2010. Apart from that, we also show findings of polluted well water and also provide solutions on how to care for wells. During material delivery activities, we use an educational and participatory approach with the main focus being the community. The result of this service activity is that the community in Poka Village has good knowledge regarding drinking water quality standards so that it is hoped that the community can apply them in their daily lives.
Identification of seawater intrusion based on geochemical data in Pelauw-Kariu Region, Maluku Rumpakwakra, Ervina; Jaya, Gede Wiratma; Bahri, Samsul; Ramahdan, Aditya; Zulfiah, Zulfiah; Thohirah, Afifah; Taipabu, Muhammad Ikhsan
Journal of Degraded and Mining Lands Management Vol. 11 No. 3 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.113.5575

Abstract

Groundwater is utilized as a clean water source including in Pelauw and Kariu Villages. Drilling and excavating are frequent techniques utilized in the construction of wells that serve as sources of groundwater. As a result of the ocean encircling the majority of this area, salinity may infiltrate wells. Consequently, the purpose of this study was to ascertain whether seawater intrusion had occurred in 12 nearby wells. Major ion tests were carried out in the lab, while surveys and measurement fields were carried out for the sampling procedure. Ion Cl, EC, TDS, Simpson ratio, and BEX data are used in the analysis to determine whether seawater intrusion is present. Additionally, the Piper diagram is used to categorize different types of water based on the outcomes of the main ion test. The findings indicated that Cl-, EC, and TDS levels have increased at a number of the sampling sites. At point A09, there is an indication of seawater intrusion based on the BEX values, which shows a negative number. The majority of the well water, as determined by a water classification analysis using the Piper diagram, is of the calcium carbonate type. Meanwhile, the remaining portion is separated into the calcium sulfate and sodium bicarbonate types.
PERHITUNGAN NILAI ENERGI CELAH PITA MINYAK KAYU PUTIH MENGGUNAKAN DATA PENGUKURAN SPEKTROFOTOMETER UV-VIS Jaya, Gede Wiratma; Nggolaon, Delpina; Rumpakwakra, Ervina; Rachmah, Alif Nur Laili; Rahanra, Geraldi; Taipabu, Muhammad Ikhsan; Trisnantari, Tamaratritania Citta; Badaruddin, Sabrianah
JOURNAL ONLINE OF PHYSICS Vol. 10 No. 2 (2025): JOP (Journal Online of Physics) Vol 10 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v10i2.41575

Abstract

Minyak kayu putih merupakan salah produk pengolahan yang sering dimanfaatkan dalam kehidupan sehari-hari. Penelitian minyak kayu putih sebagian besar fokus pada uji kualitas berdasarkan Standar Nasional Indonesia (SNI) 3954:2014 dan 06-3954-2001. Penelitian ini bertujuan untuk mengetahui energi celah pita minyak kayu putih dari berbagai macam produk. Sampel penelitian sebanyak tiga sampel yang berasal dari produk peyulingan di Pulau Buru (sampel A), toko oleh-oleh (sampel B), dan swalayan (sampel C) di Kota Ambon. Ketiga sampel dilakukan pengukuran serapan panjang gelombang menggunakan spektrofotometer UV-Vis. Hasil pengukuran digunakan untuk menghitung nilai energi celah pita menggunakan metode Tauc Plot dengan transisi langsung Energi celah pita untuk sampel A, B, dan C masing-masing sebesar 3,404 eV, 3,348 eV, dan 3,722 eV. Hasil perhitungan menunjukkan minyak kayu putih memiliki potensi sebagai material pendukung dalam Dye Sensitized Solar Cell (DSSC). Hal ini dikarenakan nilai energi celah pita yang dihasilkan masih berada di area semikonduktor.
Edukasi ecoprint dengan teknik pounding berbasis kearifan lokal, sebagai pewarnaan ramah lingkungan di Mamala, Maluku Tengah Trisnantari, Tamaratritania Citta; Rachmah, Alif Nur Laili; Rahanra, Geraldi; Taipabu, Muhammad Ikhsan; Badaruddin, Sabrianah; Rumpakwakra, Ervina; Jaya, Gede Wiratma; Nggolaon, Delpina; Alzagladi, Safina Utari
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 9, No 5 (2025): September (In Progress)
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v9i5.34077

Abstract

Abstrak Penggunaan pewarna sintetis dalam industri tekstil dapat menimbulkan risiko pencemaran lingkungan dan membahayakan kesehatan manusia. Oleh karena itu, ecoprint hadir sebagai alternatif pewarnaan ramah lingkungan yang memanfaatkan warna alami dari tumbuhan. Kegiatan Pengabdian kepada Masyarakat (PkM) ini bertujuan memberikan edukasi tentang bahaya pewarna sintetis, memperkenalkan ecoprint dengan teknik pounding, serta memanfaatkan kearifan lokal berupa tumbuhan sekitar sebagai pewarna alami. Mitra kegiatan ini adalah SMAS Muhammadiyah Mamala, Maluku Tengah, dengan peserta sebanyak 32 orang (30 siswa dan 2 guru). Metode pelaksanaan mencakup ceramah, diskusi, demonstrasi, dan praktik langsung pembuatan ecoprint pada tas katun menggunakan daun lokal seperti pakis dan pepaya jepang. Evaluasi dilakukan melalui pre-test dan post-test serta observasi selama kegiatan berlangsung. Hasil evaluasi menunjukkan peningkatan pemahaman peserta terhadap dampak pewarna sintetis dan prinsip ecoprint. Sebanyak 30 peserta menyatakan ingin kembali mencoba praktik ecoprint. Secara umum, peserta menunjukkan antusiasme tinggi dan mampu menghasilkan motif ecoprint yang unik. Meskipun terdapat kendala seperti keterbatasan alat dan hasil cetakan yang kurang jelas, kegiatan berjalan lancar dan memberi dampak positif terhadap peningkatan kesadaran lingkungan serta keterampilan kreatif peserta. Edukasi ecoprint ini berpotensi dikembangkan sebagai bagian dari kewirausahaan berbasis sekolah dengan pendekatan edukatif dan berkelanjutan. Kata kunci: ecoprint; teknik pounding; edukasi lingkungan; kearifan lokal; pewarna alami. Abstract The use of synthetic dyes in the textile industry poses significant risks to both environmental and human helath. As a sustainable alternative, ecoprint utilizes natural pigments from plant materials to create textile patterns without generating hazardous chemical waste. This community service program aimed to raise awareness about the environmental hazards of synthetic dyes, introduce the pounding technique in ecoprinting, and promote the use of local plant resources as natural dyes rooted in local wisdom. The activity was carried out at SMAS Muhammadiyah Mamala, Central Maluku, involving 32 participants (30 students and 2 teachers). The program combined educational lectures, discussions, demonstrations, and hands-on workshops in which participants applied the pounding technique to cotton tote bags using local foliage such as ferns and Japanese papaya leaves. Evaluation through pre- and post-tests, along with direct observation, indicated a significant improvement in participants’ understanding of eco-friendly dyeing practices. Most participants expressed strong interest in continuing ecoprinting activities. Despite minor challenges—such as limited tools and difficulties in achieving sharp prints—the program was successfully implemented. It fostered environmental awareness, creativity, and practical skills among students. This initiative demonstrates strong potential to be further developed into a school-based entrepreneurship model with ecological and educational value. Keywords: ecoprint; pounding technique; environmental education; local wisdom; natural dyes.
Co-Authors Afifah Thohirah Afifah Thohirah Alif Nur Laili Rachmah Alzagladi, Safina Utari Badaruddin, Sabrianah Delpina Nggolaon Delpina Nggolaon Gede Wiratma Jaya Gede Wiratma Jaya, Gede Wiratma Hariyati Purwaningsih Heru Setyawan Ivonne Telussa Jolantje Latupeirissa Karthickeyan Viswanathana Marcia Violetha Rikumahu Micky Kololu Micky Kololu Muhammad Ikhsan Taipabu Nggolaon, Delpina Nikmans Hattu Nikmans Hattu Rahanra, Geraldi Ramahdan, Aditya Samuel Simra Pada Stevi Silahooy Stevi Silahooy Taipabu, Muhammad Ikhsan Thohirah, Afifah Trisnantari, Tamaratritania Citta Veithzal Rivai Zainal Wei Wu Widiyastuti Widiyastuti Zulfiah, Zulfiah