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All Journal VALENSI The Journal of Pure and Applied Chemistry Research JURNAL KAJIAN TEKNIK MESIN Jurnal Pengabdian UNDIKMA Journal of Metallurgical Engineering and Processing Technology JUKESHUM: Jurnal Pengabdian Masyarakat Creative Research in Engineering (CERIE) Jurnal Ilmiah Sains J-ENSITEC (Journal of Engineering and Sustainable Technology)
Setyani, Atik
Program Studi Teknik Metalurgi, Fakultas Teknologi Mineral, Universitas Pembangunan Nasional “Veteran” Yogyakarta
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Fabrikasi Nanotubes Titanium Dioksida (TiO2) Menggunakan Metode Hidrotermal Atik Setyani; Emas Agus Prastyo Wibowo
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 3, No. 1, Mei 2017
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (933.291 KB) | DOI: 10.15408/jkv.v3i1.5036

Abstract

Nanotubes received great attention because it has a high surface area. In this study, TiO2 nanotubes fabricated via hydrothermal method from  synthesis of TiO2 nanoparticles via sol-gel method. Catalysts that have been synthesized later in the characterization by X-Ray Diffraction (XRD) to obtain the crystal size and crystallinity. Crystal size of TiO2 nanoparticles at a temperature of 450C is 13.78 nm. Then characterized by Transmission Electron Microscopy (TEM) to look at the formation of nanotubes. Characterization of TiO2 nanotubes with TEM shows that the structure of the tubes had already been formed TNTs although the growth has not been perfect. It can be seen from the structure TNTs who tend to be short and yet so irregular.DOI: http://dx.doi.org/10.15408/jkv.v0i0.5036  
Comparative Analysis of Chemical Components of Purified Essential Oil from Nilam Plants using Gas Chromatography Emas Agus Prastyo Wibowo; Fadila Mauliani; Utami Nofitasari; Atik Setyani; Nuni Widiarti
The Journal of Pure and Applied Chemistry Research Vol 6, No 1 (2017): Edition of January - April 2017
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1092.811 KB) | DOI: 10.21776/ub.jpacr.2017.006.01.270

Abstract

This study aimed to determine the chemical components of the patchouli oil. Patchouli oil is one of the export commodities that have high economic value for Indonesia.  In general, patchouli oil obtained from the hydrodistillation of patchouli leaves. Most industries are still using patchouli oil refiners made by ferrous metal. The rust will dissolve in patchouli oil obtained and led to the resulting of dark oil and patchouli aroma becomes lower. The main purpose of this research is to improve the quality of patchouli oil by the purification process technologies after oil refining process. In this research the purification of the impure and crude oil can be carried out using adsorption process with bentonite. Purification results with UV-VIS spectrophotometer showed that the activation energy at a wavelength of 510 nm-550 nm with 3.9 x 10-19 Joules. GC (Gas Chromatography) analysis showed that there are 13 components from patchouli oil, the 6 dominant peaks were compounds of patchouli alcohol (29.64%), delta-guanine (23.26%), alpha-guanine (21.9%), alpha-patchouline (4.24%), pogostol (4.15%), palustrol (4.00%), beta-pinene (3.9%). Based on the physical properties, the main constituent component content, and the Fe2+ content, refined patchouli oil meets the requirements of the Indonesian National Standards.
PENGARUH PELARUT TERHADAP KARAKTERISTIK NANOPARTIKEL TITANIUM DIOKSIDA (TiO2) Atik Setyani; Emas Agus Prastyo Wibowo
JURNAL ILMIAH SAINS Volume 17 Nomor 1, April 2017
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (734.107 KB) | DOI: 10.35799/jis.17.1.2017.15103

Abstract

PENGARUH PELARUT TERHADAP KARAKTERISTIK NANOPARTIKEL TITANIUM DIOKSIDA (TiO2) ABSTRAK Tujuan penelitian ini adalah untuk membandingkan jenis pelarut dalam proses pembentukan nanopartikel titanium dioksida dengan metode sol gel. Hasil karakterisasi dengan X-Ray Diffraction (XRD) menunjukkan bahwa penggunaan pelarut berpengaruh terhadap kristalinitas dan fasa material yang terbentuk. Berdasarkan Joint Committee on Powder Diffraction Standards (JCPDS) card nomor 84-1286 menunjukkan difraktogram nano TiO2 hasil sintesis sebagian besar merupakan fasa anatas. Hal ini terlihat dari nilai 2 teta yang diperoleh yaitu 24,45˚; 47,29˚; 53,18˚; 61,64˚ untuk fasa anatas dan 54,65˚; 74,16˚ untuk fasa rutil. Hanya saja persentase fasa anatas pada nano TiO2 menggunakan pelarut metanol lebih besar jika dibandingkan dengan hasil nano TiO2 dengan pelarut etanol. Berdasarkan perhitungan ukuran partikel nano TiO2 menggunakan persamaan Debye- Scherer didapatkan ukuran nano TiO2 menggunakan metanol sebesar 13.78 nm sedangkan  nano TiO2 menggunakan etanol sebesar 34.26 nm. Kata Kunci: Pelarut, sol-gel, titanium dioksida   EFFECT OF SOLVENTS ON THE CHARACTERITICS OF NANOPARTICLES TITANIUM DIOXIDE (TiO2) ABSTRACTThe purpose of this study was to compare the type of solvent in the process of formation of titanium dioxide nanoparticles with sol gel method. X-Ray Diffraction (XRD) characterization results indicate that the use of solvent effect on crystallinity and phase material formed. Based Joint Committee on Powder Diffraction Standards (JCPDS) 84-1286 card numbers show diffractogram nano TiO2 synthesized largely a anatas phase. This can be seen from a value of 2 theta obtained by the 24,45˚; 47,29˚; 53,18˚; 61,64˚ to phase anatas and 54,65˚; 74,16˚ for rutile phase. Only a small percentage of the nano TiO2 anatase phase using methanol solvent is greater when compared with the results of nano TiO2 with ethanol. Based on the calculation of nano TiO2 particle size using equation Debye- Scherer obtained nanosized TiO2 using methanol amounted to 13.78 nm while the nano TiO2 using ethanol amounted to 34.26 nm. Keywords: Solvent, sol-gel, titanium dioxide
SINTESIS DAN KARAKTERISTIK TiO2 DAN SiO2 SERTA APLIKASINYA TERHADAP KADAR Fe DALAM AIR SUMUR Wening Dwi Prastiwi; Khoironni Devi Maulana; Emas Agus Prastyo Wibowo; Navela Rahma Aji; Atik Setyani
JURNAL ILMIAH SAINS Volume 17 Nomor 1, April 2017
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (503.612 KB) | DOI: 10.35799/jis.17.1.2017.15220

Abstract

SINTESIS DAN KARAKTERISTIK TiO2 DAN SiO2 SERTA APLIKASINYA TERHADAP KADAR Fe DALAM AIR SUMURABSTRAK Air merupakan kebutuhan yang terpenting dalam kehidupan manusia. Air berperan banyak dalam berbagai kegiatan manusia oleh karena itu kandungan yang ada di air harus bermanfaat bagi manusia. Banyak kandungan yang terdapat di air yang sangat bermanfaat, tetapi bayak juga kandungan air yang mungkin tidak bermanfaat bahkan bahaya jika digunakan oleh manusia, salah satunya yaitu kandungan logam berat terutama Fe (besi).  Sehingga tujuan pada penelitian ini untuk mengetahui penurunan kadar Fe (besi) dalam air sumur yang di lakukan dengan fotokimia dengan TiO2 dan SiO2 serta dapat mengidentifikasi karakteristik dari TiO2 dan SiO2. Sampel yang digunakan yaitu air sumur 300 m dibagi menjadi tiga masing-masing 100 ml dengan perlakuan yang berbeda. Pada sampel 100 ml pertama tidak diberikan perlakuan dan juga penambahan. Sampel 100 ml kedua diperlakukan dengan penambahan SiO2 dan pengadukan selama 1 jam, dan untuk sampel 100 ml ketiga diperlakukan dengan penambahan TiO2 dan pengadukan selama 1 jam. Ketiga sampel dengan perlakuan yang berbeda tersebut di analisis dengan menggunakan AAS (Atomic Absorption Spectroscopy) di Laboratorium Kimia Universitas Negeri Semarang. Hasil penelitian Analisis menggunakan AAS (Atomic Absorption Spectroscopy) menunjukkan hasil kadar Fe meningkat pada saat penambahan SiO2 dan TiO2 terhadap sampel yang tidak mendapatkan perlakuan tambahan. kadar Fe pada sampel yang tanpa penambahan sebanyak 0,206 mg/L, kemudian kadar Fe pada sampel yang ditambahkan SiO2 sebenyak 0,225 mg/L, dan kadar Fe pada sampel dengan penambahan TiO2 sebanyak 0,214 mg/L. Hal ini dikarenakan bentuk TiO2 dan SiO2 berupa suspensi. Kelemahan sistem suspensi ini adalah pemisahan partikel TiO2 memerlukan waktu yang lama dan biaya yang sangat mahal,serta daya tembus sinar sinar UV yang terbatas karena absorbsi yang kuat oleh TiO2 (efek bayangan) dan spesies organik terlarut. Kata Kunci: air sumur, TiO2, SiO2, Logam besi (Fe).  SYNTHESIS AND CHARACTERISTICS OF TiO2 AND SiO2 APPLICATION TOWARD LEVELS OF Fe IN THE WELL WATERABSTRACTWater is the most important need in human life. Also, water has many contributions in many human activities. Therefore, the existing content in the water must be beneficial for human. However, material contained in water may be beneficial yet dangerous for human as well, for instance heavy metals content, especially Fe (iron). The main objective of this study is to determine decreasing levels of Fe (iron) in the well water that is done by photochemical reaction using TiO2 and SiO2, and identify the characteristics of TiO2 and SiO2. Samples of well water used is 300 ml divided into three part, and every part of 100 ml water will be given different treatment. First 100 mL sample is not given any treatment and addition. Second 100 mL samples treated with the addition of SiO2 and stirring for an hour, and the third sample of 100 mL is treated with the addition of TiO2 and stirring for an hour. All of three samples with different treatments are analyzed using AAS (Atomic Absorption Spectroscopy) in the Chemistry Laboratory Semarang State University. The research result of analysis using AAS (Atomic Absorption Spectroscopy) shows Fe content increased as the addition of SiO2 and TiO2 in the samples than the sample without any additional treatment. Fe content in the sample without addition is 0.206 mg/L, while Fe content in the sample with addition of SiO2 is 0.225 mg/L, and Fe content in the sample with the addition of TiO2 is 0.214 mg/L. This caused by the form of TiO2 and SiO2 is a suspension. The weakness of this suspension system is the TiO2 particle separation takes a long time, very expensive, and also limited UV rays penetrating power because of the strong absorption by TiO2 (shadow effect) and may dissolved organic species. Keywords: well water, TiO2, SiO2, metals iron (Fe).
Potensi dan Karakterisasi Limbah Metalurgi “Slag Nikel Pig Iron” Atik Setyani; Yasmina Amalia; Hendy Roesma Wardhana
Journal of Metallurgical Engineering and Processing Technology Vol 3, No 2 (February 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v3i2.8579

Abstract

Pada beberapa tahun terakhir, pertumbuhan industri pengolahan material non fero seperti nikel, alumumium maupun tembaga berkembang sangat pesat. Hal ini secara tidak langsung berdampak terhadap peningkatan limbah metalurgi hasil pengolahan material tersebut. Di Indonesia, slag pengolahan logam diantarannya slag Nikel Pic Iron (NPI) merupakan salah satu limbah yang belum digunakan secara optimal. Disisi lain slag NPI diketahui mengandung unsur-unsur seperti Pb, Zn, As, Cd dan Co yang berpotensi mencemari lingkungan dan membahayakan manusia. Upaya pemanfaatan slag NPI menjadi produk yang lebih bernilai sangat penting dilakukan untuk meningkatkan nilai ekonomi dari limbah metalurgi dan meminimalisir pencemaran lingkungan. Oleh karena itu, pada penelitian ini telah dilakukan karakterisasi slag NPI yang berpotensi untuk dikembangkan sebagai geopolimer. Karakterisasi dilakukan menggunakan EDS mapping dan XRD pada slg NPI dengan ukuran 200 mesh. Hasil karakterisasi menunjukkan bahwa terdapat fasa quartz, clinoenstatite, silimanite, calcium peroxide, olivine, forsterite, fayalite dan hypothetikal silika. Fasa tersebut terindentifikasi melalui puncak-puncak difraktogram XRD pada sudut 20-70o. Selain itu, hasil mapping mengindikasikan beberapa senyawa seperti silika, magnesium dan oksigen tersebar diarea yang sama dan merata.
Prediksi Laju Erosi Baja API 5L pada Pipa Siku Minyak dan Gas Menggunakan Komputasi Fluida Hendy Roesma Wardhana; Atik Setyani; Sudaryanto Sudaryanto
Journal of Metallurgical Engineering and Processing Technology Vol 3, No 2 (February 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v3i2.8743

Abstract

A large amount of oil and gas production needs to be followed by optimal pipeline maintenance. Most cases of pipe leaks are sudden in nature that able to cause losses over a long period of time. The gas consisting of sand particles able to increase erosion rate, especially at the pipe elbows. Cases of pipe leaks able to be prevented through routine inspections based on accurate erosion rate predictions. This study aims to predict the erosion rate of elbow piping systems using computational fluid simulations. The pipe material used is API 5L x60 and x70 steel. The simulation environment is arranged in such a way as to the reality on the oil and gas field. Methane gas containing sand particles with a hardness of 1100 HV is applied to this simulation. The simulation results prove that there is a relationship between the erosion rate, pipe hardness, and impact angle.Keywords: Erosion Rate Predictions, Elbow Pipe, and Hardness Pipe
Pengaruh Perlakuan Panas Terhadap Struktur Mikro Cu-based Shape Memory Alloy Atik Setyani; Hendy Roesma Wardhana
Journal of Metallurgical Engineering and Processing Technology Vol 2, No 3 (July 2022) Special Edition
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v2i3.9385

Abstract

Paduan Shape Memory Alloy (SMA) memiliki kecerdasan fungsional yang dapat merespon tekanan maupun temperatur melalui transformasi termoelastik secara non difusi. Dalam pengembangannya, perlakuan panas akan sangat berpengaruh terhadap performa material yang dapat dilihat salah satunya melalui fasa martensit yang terbentuk. Oleh karena itu pada penelitian ini dipelajari pengaruh perlakuan panas dengan memvariasikan media pencelupan pada plat SMA Cu-28Zn-3Al wt. % terhadap sifat struktur mikronya.  Media pencelupan yang digunakan dalam penelitian ini adalah campuran es kering+air (EW) dan es kering+alkohol (EA) sebagai media pendingin pada rentang temperatur (5 s.d -5 ℃). Tahapan penelitian dimulai dengan perlakuan betatizing plat Cu-28Zn-3Al wt. % pada temperatur 825 ℃ selama 30 menit kemudian di quenching dengan metode direct quench menggunakan variasi media pendingin yaitu EW dan EA. Karakterisasi dilakukan menggunakan optical microscope, XRD dan microvickers. Hasil pengamatan strukturmikro sampel as-quench menunjukkan bahwa perlakuan panas dengan variasi media pencelupan menyebabkan transformasi fasa dari α+β menjadi fasa martensit dan retained α. Selain itu, variasi media pendingin juga menyebabkan terjadinya perbedaan rasio fasa martensit dan retained α pada masing-masing sampel karena perbedaan laju pendinginan, namun tidak disertai perbedaan ukuran butir yang signifikan. Hasil pengujian microvickers menunjukkan kekerasan fasa martensit lebih tinggi dibandingkan dengan retained α.
ANALISIS FORMING LIMIT DIAGRAM (FLD) PADA MATERIAL TEMBAGA Mansyur Abdul Shaleh; Atik Setyani
Journal of Metallurgical Engineering and Processing Technology Vol 2, No 3 (July 2022) Special Edition
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v2i3.9372

Abstract

Forming Limit Diagram also known as forming limit curve, is used in sheet metal forming to predict sheet metal forming behavior. The diagram contains a graphical description of a material failure test, such as the hollow dome test. This study aims to make a Forming Limit Diagram (FLD) of copper material with a thickness of 0.5 mm through the Nakazima standard FLD test using the experimental method research process. FLD test results are strengthened by tensile testing using the ASTM E8 standard with a cutting angle at 00 450, and 900 against the plate rolling direction. The results of the FLD test analysis on copper with a thickness of 0.5 mm show that the specimen has a maximum major strain value of 17.96% and a maximum minor strain of 7.05% while for tensile strength a cutting angle of 450 has the greatest maximum stress of 124,414 MPa, and experienced the greatest strain of 28.8%. specimen 00 true stress was 85.934 MPa, true strain was 14.5 %, and specimen 900 was true stress was 116.138 MPa, true strain was 25.4 %.
Pemberdayaan Kelompok Wanita Tani Melalui Pelatihan Produksi Kopi Rendah Kafein Berbahan Biji Buah Salak Muhamad Ridwan; Hani Subagio; Yuliawati Yuliawati; Alvian Alvin Mubarok; Atik Setyani
Jukeshum: Jurnal Pengabdian Masyarakat Vol. 3 No. 2 (2023): Edisi Juli 2023
Publisher : Universitas Haji Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51771/jukeshum.v3i2.561

Abstract

Perkebunan buah salak di Kabupaten Sleman, Daerah Istimewa Yogyakarta merupakan salah satu tumpuan utama perekonomian masyarakat di lereng Gunung Merapi. Namun fakta di lapangan menunjukkan beberapa permasalahan seperti fluktuasi harga buah salak dan karakteristik buahnya yang mudah membusuk, ancaman erupsi Gunung Merapi, serta kurangnya inovasi warga setempat dalam mengoptimalkan potensi buah salak. Oleh karena itu, diperlukan solusi melalui optimalisasi potensi buah salak guna mengurangi dampak permasalahan tersebut melalui inovasi pengolahan biji buah salak menjadi produk dengan wujud seperti kopi dengan teknik yang tepat untuk menghasilkan karakteristik produk yang sesuai kebutuhan pasar. Program pemberdayaan ini dilaksanakan dalam beberapa tahapan diantaranya yaitu koordinasi dengan ketua kelompok wanita tani, sosialisasi program kepada peserta, persiapan pelatihan, pelaksanaan pelatihan dan pendampingan, serta evaluasi dan tindak lanjut. Hasil dari program pemberdayaan ini yaitu seluruh peserta pelatihan telah terampil dalam mengelola bahan baku biji buah salak dan memproduksinya menjadi kopi biji salak. Diperlukan adanya program lanjutan untuk mencapai tujuan besarnya yaitu mencakup asas kebermanfaatan bagi para petani dan buruh tani salak sebagai upaya meningkatkan kesejahteraan ekonomi, bagi konsumen yang membutuhkan variasi minuman kopi yang rendah kafein, serta bagi pemerintah dalam rangka mendukung ikon daerah yang mendukung sektor pariwisata dan ekonomi kreatif.
A Review of Reforming Processes in the Railway Manufacturing Industry : Case Study of PT. Industri Kereta Api (Persero) Stephanus Yosi Kristanta; Atik Setyani; Sudaryanto Sudaryanto; Muhammad Syukron; Muji Santoso
Journal of Metallurgical Engineering and Processing Technology Vol 5, No 1 (August 2024)
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v5i1.12772

Abstract

The railway manufacturing industry is critical for developing efficient and sustainable mass transportation systems. PT. Industri Kereta Api (Persero) (PT. INKA), a leading company in Indonesia, faces significant challenges due to deformation caused by residual stress during welding processes. This study reviews various reforming techniques implemented by PT. INKA to address these issues. The objectives include evaluating the effectiveness of these techniques and identifying potential improvements. Methods such as post-weld heat treatment (PWHT), controlled cooling, and mechanical tools are analyzed for their ability to mitigate deformation. The study demonstrates that PWHT reduces residual stress and improves material quality by homogenizing the microstructure. Controlled cooling techniques effectively reduce distortion by allowing even temperature distribution during the cooling process. Mechanical tools provide nonthermal methods to stabilize and control deformation, significantly reducing distortion levels. Despite the success of these techniques, PT. INKA faces challenges related to process control and skill variance among workers. The study concludes that while reforming techniques significantly enhance the structural integrity and performance of railway components, consistent implementation and clear guidelines are essential for future improvements. Developing new technologies, enhancing workforce training, and creating comprehensive process guidelines are recommended to maintain high standards and competitiveness in the global market.
Co-Authors Aji, Navela Rahma Alvian Alvin Mubarok Andika Adevicky Irwansyah Arif, Nina Fapari Emas Agus Prastyo Wibowo Emas Agus Prastyo Wibowo Emas Agus Prastyo Wibowo Emas Agus Prastyo Wibowo Emas Agus Prastyo Wibowo, Emas Agus Prastyo Fadila Mauliani Firmansyah Ismudian Syahidin Hani Subagio Hendy Roesma Wardhana Ichsanudin, Muhammad Imam Prabowo, Imam Irwansyah, Andika Adevicky Jheno Sheva Hermawan, Moch. Aditya Kristanta, Stephanus Yosi Mafruhah, Annida Justisia Mansyur Abdul Shaleh Mansyur Abdul Shaleh Maulana, Khoironni Devi Muhamad Ridwan Muhammad Syukron Muji Santoso Muji Santoso Naibaho, Nathan Gorga Tona Navela Rahma Aji Nixon Carlotta Nuni Widiarti Nur Amin, Nur Pradipa, Raditya Khayru Pranoto, Aditya Wahyu Pratomo, Dias Dibyo Santoso, Muji Sari, Meirinda Anggrita Shaleh, Mansyur Abdul Stephanus Yoshi Kristanta Stephanus Yosi Kristanta SUDARYANTO SUDARYANTO Sudaryanto Sudaryanto Syukron, Muhammad Tantrianita, Rikma Utami Nofitasari Wening Dwi Prastiwi Wening Dwi Prastiwi, Wening Dwi Yasmina Amalia Yuliawati Yuliawati