Pencucian material magnetik pasir besi lansilowo menggunakan larutan asam klorida

Iron sand was widely used in various fields such as in the manufacturing of magnets, cement, and steel. Iron sand has the main composition of iron oxide and several impurities of oxides. To remove these impurities, iron sand needs to be washed with acidic solution such as HCl solution. This study aims to minimize impurities in the magnetic material of Lansilowo iron sand. Iron sand was prepared using an external magnet to obtain magnetic material. The magnetic material was washed using distilled water and 0.5 M HCl solution. The drying process was carried out at 80oC for 24 hours. Magnetic material was crushed, weighed, and characterized. Material characterization was carried out using X-Ray Fluorescence (XRF), Fourier Transform Infrared (FT-IR) Spectrophotometer, and X-Ray Diffractometer (XRD). The Characterization results showed that washing of magnetic material using H2O-HCl 0.5 M was able to increase the percentage of Fe element composition in Lansilowo iron sand. The iron oxide contained in Lansilowo Iron Sand remains magnetite. The washing the iron sand magnetic material using 0.5 M HCl solution succeeded in removing impurities such as Mg, Pr, K, Cl, P, S, Co, Ce, and Sn as well as reducing the percentage of the Si and Al elements.The washing magnetic material using 0.5 M H2O-HCl produced higher XRD intensities than those washed with H2O. The washing magnetic material with 0.5 M H2O-HCl was result particle size of 37,70 ± 4,62 nm and crystallinity of 53.12%

Studi Kasus Pemilihan Jenis Runner pada Injection Molding Plastik

Injection molding is one of the most widely used methods of the plastic production process. This is indicated by grow up of mold makers company. Based on the placement of the filling channel into cavity, they are 2 (two) types. The first is cold runner or convensional and the second is hot runner. The purpose of this research is to collect advantages and disadvantages of each based on a case study. So that it can be taken into consideration in determining the appropriate runner. The research was conducted on a cold runner mold which was then modified using a hot runner. The comparison before and after the modification results in the runner weight ratio dropping from 60% to zero percent. The step of the mold opening decreased from 170 mm to 75 mm or by 44%

PENGARUH RUTE SINTESIS TERHADAP KEEFEKTIFAN PENGIKATAN GUGUS PDETA PADA SINTESIS Fe3O4@SiO2@PDETA

Synthesis of Fe3O4@SiO2 modified with propyldiethylenetriamine (Fe3O4@SiO2@PDETA) with variation of synthesis routes have been investigated. Research was begun with synthesis of Fe3O4 using dispersion agent of trisodium citrate at coprecipitation system through stirring using ultrasonic wave. Coating magnetite with propyldiethylenetriamine modified silica was carried out through sol-gel process with two different mixing sequences of raw materials (two synthesis routes) with main materials of Fe3O4 synthesized, N-[3-(Trimethoxysilyl)propyl]-diethylenetriamine (TMSPDETA) and Na2SiO3. The products were characterized by fourier transform infrared (FTIR) spectrophotometer and scanning electron microscope-energy dispersive X-ray (SEM-EDX). Results indicate that Fe3O4@SiO2@PDETA has been synthesized succesfully. Fe3O4@SiO2@PDETA synthesized through route 1 (magnetite mixed with a mixture TMSPDETA and Na2SiO3) contains more propyldiethylenetriamine group than that of through route 2 (magnetite mixed with Na2SiO3 solution, then mixed with TMSPDETA

PREPARASI DAN PENENTUAN JENIS OKSIDA BESI PADA MATERIAL MAGNETIK PASIR BESI LANSILOWO

This study aims to preparation, identify the content, and determine the type of iron oxide on the magnetic material from Iron Sand Lansilowo. Magnetic material is separated from iron sand using an external magnet. Magnetic material washes by using aquadest and dried at 80 °C. Materials were characterized by X-Ray fluorescence (XRF), Fourier Transform Infrared (FT-IR) spectrophotometer, X-ray diffractometer (XRD) and Transmission electron microscope (TEM). The results show that the magnetic material of iron sand Lansilowo contains elements of Fe (46.13%), the element Cr (28.08%), Mg (10,11%), Si (8.20%) and other minor elements. Iron oxide contained in iron sand Lansilowo is dominated by magnetite iron oxide (Fe3O4). The results of characterization show that the magnetic material of iron sand still contain oxide impurities such as silica oxide and chromium oxid

PENGARUH PELARUT TERHADAP DISPERSI PARTIKEL Fe 3O4@SITRAT.

PENGARUH PELARUT TERHADAP DISPERSI PARTIKEL Fe 3O4@SITRAT. Magnetit (Fe3O4) memiliki sifat yang khas dan memiliki banyak aplikasi dalam berbagai bidang. Dispersi partikel berperan penting dalam menentukan sifat magnetit. Tujuan penelitian ini adalah untuk mengetahui pengaruh jenis pelarut (aseton-air dan aseton-etanol) terhadap dispersi partikel [email protected] Fe3O4 dilakukan menggunakan natrium sitrat sebagai agent pendispersi magnetit melalui pengadukan dengan gelombang ultrasonik pada sistem co-presipitasi, kemudian dilakukan pencucian dengan variasi pelarut. Produk hasil sintesis dikarakterisasi dengan Fourier Transform Infrared Spectrophotometer (FT-IR), X-Ray Diffraction (XRD), dan Transmission Electron Microscope (TEM). Hasil menunjukkan bahwa Fe3O4 yang terdispersi oleh natrium sitrat dengan pencucian aseton-air menghasilkan dispersi partikel yang lebih baik dan memiliki agregat yang lebih kecil dibandingkan pencucian aseton-etanol

Pelatihan Pembuatan Ecobrick di Sendangmulyo Kecamatan Tembalang Sebagai Alternatif Penanganan Limbah Plastik

Kegiatan Pengabdian Kepada Masyarakat ini bertujuan untuk yaitu memberikan pengetahuan dan pemahaman kepada masyarakat RT 05 RW 01 Kelurahan Sendangmulyo stentang bahaya limbah plastik terhadap kesehatan lingkungan, memberikan informasi kepada masyarakat tentang cara pemilahan sampah, memberikan pengetahuan tentang pengolahan limbah plastik dengan metode Ecobricks, memberikan pelatihan cara pembuatan Ecobrick dan menumbuhkan kesadaran kepada masyarakat untuk meminimalisir penggunaan plastik. Metode kegiatan yang diterapkan adalah dengan pendekatan langsung ke warga, yang dimulai dari survey lapangan, pembuatan proposal kegiatan, mengumpulkan warga untuk diberikan sosialisasi dan sekaligus praktek pembuatan Ecobrick dan diakhiri dengan kegiatan pemantauan hasil kegiatan serta pembuatan laporan kegiatan. Hasil dari kegiatan ini adalah produk Ecobrick yang sudah dibuat oleh Ibu-Ibu peserta sosialisasi dan pelatihan ini. Pemantauan dari hasil kegiatan sosialisasi dan pelatihan pembuatan ecobrick ini adalah dengan cara mengumpulkan produk hasil ecobrick yang sudah dibuat oleh peserta dan membantu mendonasikan kepada DLH Kota Semarang untuk digunakan sebagai bahan pembuatan Taman Ecobrick Kota Semarang. Implikasi dari kegiatan pengabdian ini adalah warga RT 05 RW 01 Kelurahan Sendangmulyo lebih bijaksana dalam penggunaan plastik, memilah sampah plastik dan membuatnya menjadi Ecobrick

The Synthesis of Triamine Group Modified Silica Hybrid Material Coated on Muara Kencan Iron Sand for Hg (II) Adsorption

Hg metal was toxic and harmful to the environment because it does not biodegradation, can accumulate in living things, and pollute waters. One method that can be used was adsorption by inorganic-organic hybrid materials. This study aims to synthesize a triamine group modified silica hybrid material coated on iron sand or Magnetic Materials@Silica@Triamine (MM@SiO2@TA) to adsorb Hg(II) metal ions. The study began with the preparation of the iron sand of Muara Kencan Beach using magnets, washing using a solution of 1 M HCl and 0.5 M HF, and coating the material using sodium silica (SiO 25.5-28.5%) modified by a 99% triamine group with co-precipitation. The XRF characterization results showed that the magnetic material of the iron sand of Muara Kencan Beach has an iron oxide (magnetite) content of 73.31%. The iron oxide content increased after washing with HCl solution to 79.12% and HF solution to 81.81%. The results of FTIR, XRD, and TEM characterization showed that the MM@SiO2@TA was successfully synthesized with a size of 63.43 nm. The MM@SiO2@TA was tested to adsorb metal ion Hg(II) at a concentration of 100 ppm, pH 6, and a contact time of 1 hour. The AAS results showed that MM@SiO2@TA could adsorb metal ions Hg(II) as much as 60.82 ppm or 60.82%