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1. Introduction The improper disposal of industrial inorganic wastes such as stone waste is a worldwide problem. Due to the continuous demand of stones, the quantity of stone wastes generated during various industrial/mining, cutting, querying, sawing, and polishing processes from limestone industries increased to about 16 MT per year. 1,2 For the …
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Friction of carbon black- and silica-reinforced elastomers is studied experimentally and theoretically, using Persson's model. The effect of reinforcement fillers on elasticity was determined by dynamical mechanical analysis. Carbon black-filled samples have a higher Young's modulus than the silica-filled compounds. Silica-filled rubbers …
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kadar dan recovery bijih kromit dengan menggunakan metoda gravity – shaking table. Pengambilan sample kromit dilakukan pada akhir Desember 2016 di Desa Bahusuai Kec Bumi Jaya Morowali Sulawesi Tengah, peta lokasi seperti terlihat pada Gambar 2.2 Gambar 2.2 Peta Lokasi Pengambilan Biji Kromit 2.2 Bahan Dan Alat Percobaan
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Kromit se nahaja v peridotitu iz Zemljinega plašča. Pojavlja se tudi v slojevitih ultramafičnih intruzivnih kamninah [7] in metamorfnih kamninah, na primer v nekaterih serpentinitih. Rudni skladi kromita so se razvili kot zgodnji magmatski diferenciati. Običajno ga spremljajo olivin, magnetit, serpentin in korund.
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Here, we present a rational strategy for realizing ultralong RTP in air-saturated aqueous media from carbon dot-based silica composites (CDs@SiO 2) which feature emission lifetimes as long as 1.64 s. The excellent phosphorescence properties, their small size, and their water solubility make CDs@SiO 2 a promising material for biological …
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Kromium ditambang sebagai bijih kromit (FeCr). Sekitar dua per lima bijih dan konsentrat kromit di dunia diproduksi di Afrika Selatan, sementara Kazakhstan, India, Rusia, dan Turki juga merupakan produsen substansial. Deposit kromit yang belum dimanfaatkan berlimpah, namun secara geografis terkonsentrasi di Kazakhstan dan Afrika bagian selatan.
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Karbon (dari bahasa Latin: carbo "arang") atau zat arang adalah sebuah unsur kimia dengan lambang C dan nomor atom 6. Ia merupakan nonlogam dan tetravalen — atomnya membuat empat elektron tersedia untuk membentuk ikatan kimia kovalen. Ia berada dalam golongan 14 dari tabel periodik. [12] Karbon hanya menyusun sekitar 0,025 persen dari …
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Materials. Carbon–silica gel (CSG) samples were prepared using three types of mesoporous silica gels: Si-40, Si-60, and Si-100 (Merck) as carbon supports and CH 2 Cl 2 as a carbon source carbonized at 550 °C for 3–6 h using a quartz rotational reactor with an electric furnace. A portion of silica gel on the bottom of the reactor was ...
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On the other hand, water flux of silicapectin membranes from our work is excellently shown the highest water flux if compare to other silica-carbon membranes done by other researchers [4, 5, 23]. Sadly, for water flux of silica-P123 from our works shows low value compare to work done by other researchers (varied from 1.9 to 3.7 kg.m-2.h-1).
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Phototheranostics, which is the application of light in the diagnostic imaging and therapy of cancer, has shown great promise for multimodal cancer imaging and effective therapy. Herein, we developed multifunctional gold nanorod@silica-carbon dots (GNR@SiO2-CDs) as a phototheranostic agent by incorporating c
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Kromit. Kromit adalah sebuah wujud mineral dari besi kromium oksida. Mineral tersebut memiliki rumus kimia FeCr 2 O 4. Senyawa tersebut adalah sebuah mineral oksida yang masuk kelompok spinel. Unsur magnesium dapat menggantikan besi dalam jumlah tertentu karena unsur tersebut membentuk larutan padat dengan magnesiokromit (MgCr 2 O 4 ). [1]
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The silica/carbon composite adsorbent in this composition had the highest adsorption capacity for copper (II) ion and surface area is 75.88 mg/g and 233.45 m2/g, respectively. The optimum adsorption time was obtained for 40 minutes and the model of adsorption isotherm in the form of Freundlich adsorption with R2 = 0.9582. Abstrak Ion …
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Carbon dots derivatized from N-(β-aminoethyl)-γ-aminopropyl-methyldimethoxysilane (AEAPMS) were coated onto silica microparticles. These particles (Sil-CDs) are shown to be an excellent stationary phase for use in hydrophilic interaction chromatography. Analytes including sulfonamides, nucleosides and bases, flavones and …
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Madencilik, Cilt 54, Sayı 1, Sayfa 37-46, Mart 2015 Vol.54, , pp 37-46, March 2015 KROMİT KONSANTRASYON TESİSİ ARTIKLARINDAN MAGNEZYUM SÜLFAT (MgSO4) SENTEZİ MAGNESIUM SULPHATE (MGSO4) SYNTHESIS FROM CHROMITE CONCENTRATION PLANT TAILINGS Soner TOP* Mehmet YILDIRIM** ÖZET Bu …
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Methods of making a silica-coated carbon product are described. In one method, an aqueous media or solution and a carbon product are contacted with a solution comprising a silicate substantially free of metal ions, for a sufficient time and temperature to form the silica-coated carbon product. A method of making a silica-coated product by contacting …
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This study aimed to develop non-metal elements for doping carbon quantum dots (CQDs) with nitrogen and sulfur (N, S-CQDs), which loaded inside hexagonal mesoporous silica (HMS) in order to effectively remove methylene blue dye () from an aqueous solution. The histidine and cysteine amino acids were used as the source for …
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SYNTHESIS OF SILICA-CARBON AS SOLID ACID CATALYST Authors : Valentino Pratama Reko Pareira 2313100039 Prasetiyo Lumadi 2313100065 Advisors : Dr. Widiyastuti S.T., M.T. NIP. 19750306 200212 2 002 Ni Made Intan Putri Suari S.T., M.T. NIP. 19890106 201504 2 002 CHEMICAL ENGINEERING DEPARTMENT FACULTY OF INDUSTRIAL …
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in this paper to prepare composite nanoparticles of silica/carbon dots (SCDs) on a large scale. Glucose, the carbon source for the carbon dots (CDs), is pre-packaged by copolycondensation with tetraethoxysilane in silica nanoparticles. It is likely that this creative route can reversibly modulate the excitation-dependent behavior of CD ...
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