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Journal articles on the topic 'Activating iron particles'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Dorofeyev, V. Yu, D. N. Sviridova, and Kh S. Kochkarova. "On the question of the applicability of G.V. Samsonov’s activated sintering concept in studying the processes of powder material deformation." Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional’nye Pokrytiya (Universitiesʹ Proceedings. Powder Metallurgy аnd Functional Coatings), no. 4 (December 15, 2018): 6–14. http://dx.doi.org/10.17073/1997-308x-2018-4-6-14.

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Some Yu.G. Dorofeev’s memoirs about joint work and meetings with outstanding materials science expert G.V. Samsonov are given. Meetings in Yugoslavia were of particular importance where G.V. Samsonov and M.M. Ristićtogether with other worldfamous scientists created the International Institute for the Science of Sintering. In the last years of his life, G.V. Samsonov proposed the concept of sintering activation by additives that act as electron acceptors and additionally contribute to the ionic bond in the matrix material. The paper considers the possibility of using this concept in the develop

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2

Liu, Yunxin, Peng Zhou, Xiaowei Huo, Yang Liu, Xin Cheng, and Yongli Zhang. "Pre-magnetization for enhancing the iron-catalyzed activation of peroxymonosulfate via accelerating the corrosion of Fe0." Water Science and Technology 79, no. 7 (2019): 1287–96. http://dx.doi.org/10.2166/wst.2019.122.

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Abstract Our findings proved that micron-scale zero-valent iron (mZVI) particles with pre-magnetization combined with peroxymonosulfate (PMS) can markedly enhance the removal of acid orange 7 (AO7). Investigation into the mechanism showed that PMS accelerated the corrosion of ZVI to release Fe2+ under acidic conditions, and the in-situ generated Fe2+ further activated PMS to produce SO4•− and •OH, resulting in AO7 removal. Further, the Lorentz force strengthened the convection in the solution and the field gradient force tended to move Fe2+ from a higher to a lower field gradient at the pre-ma

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3

Wang, Yuanbo, Chaoqun Nie, Bo Li, and Yonggang Wei. "Migration and Aggregation Behavior of Nickel and Iron in Low Grade Laterite Ore with New Additives." Metals 11, no. 12 (2021): 2033. http://dx.doi.org/10.3390/met11122033.

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This study focused on the preparation of high-grade ferronickel concentrate, the behavior of efficient migration and the polymerization of ferronickel particles during reduction roasting, by adding calcium fluoride and a ferronickel concentrate to low-grade laterite ore from Yunnan. The effects of temperature, holding time, reductant content, ferronickel concentrate content and magnetic field intensity on the preparation of the ferronickel concentrate were studied and the optimum conditions were determined as follows: 30% ferronickel concentrate (metal Ni-4.68%, metal Fe-45.0%), 8% coal, 7% ca

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4

Dyachkova, L. N. "Features of the formation of the structure and properties of powder steels with additives that activate diffusion processes during sintering." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 65, no. 1 (2020): 43–53. http://dx.doi.org/10.29235/1561-8358-2020-65-1-43-53.

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Effect of activating the sintering process of powder steel alloyed with nickel or chromium by grinding the initial powders and introducing alkali metal compounds was investigated. The kinetics of grinding the initial iron powders, Cr30, and a mixture of iron powders with 4 % nickel was studied. It is shown that, depending on the hardness of the powder, it is grinded in three or two stages. When grinding more hard powders, there is no stage of intensive deformation of particles and an increase in their size. Crystalline lattice defects resulting from grinding of powders accelerate diffusion pro

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Joshi, Sahira, Manobin Sharma, Anshu Kumari, Surendra Shrestha, and Bhanu Shrestha. "Arsenic Removal from Water by Adsorption onto Iron Oxide/Nano-Porous Carbon Magnetic Composite." Applied Sciences 9, no. 18 (2019): 3732. http://dx.doi.org/10.3390/app9183732.

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This study aimed to develop magnetic Fe3O4/sugarcane bagasse activated carbon composite for the adsorption of arsenic (III) from aqueous solutions. Activated carbon (AC) was prepared from sugarcane bagasse by chemical activation using H3PO4 as an activating agent at 400 °C. To enhance adsorption capacity for arsenic, the resultant AC was composited with Fe3O4 particles by facile one-pot hydrothermal treatment. This method involves mixing the AC with aqueous solution of iron (II) chloride tetrahydrate, polyvinyl pyrrolidone (PVP), and ethanol. Batch adsorption experiments were conducted for the

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6

Artashyan, O. S., Yu S. Khramtsova, A. A. Vlasova, N. V. Tyumentseva, and B. G. Yushkov. "Mast cells as indicators of foreign particle biocompatibility." Medical Immunology (Russia) 26, no. 5 (2024): 967–74. http://dx.doi.org/10.15789/1563-0625-mca-16745.

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The key problem of introducing nanoparticles into clinical practice for diagnostic and therapeutic purposes is their safety. Connective tissue, an important component of which are mast cells, reacts actively in response to foreign particles. The reaction of mast cells can be an indicator of the biocompatibility of foreign particles. The study was conducted on male Wistar rats. Iron-carbon nanoparticles in the FeC modification stabilized in an aqueous medium using an auxiliary substance were used. Tissue examination (liver, lungs, heart, thymus, kidneys) was performed 1, 7 and 30 days after inj

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7

Huo, Xiaowei, Peng Zhou, Yunxin Liu, et al. "Removal of contaminants by activating peroxymonosulfate (PMS) using zero valent iron (ZVI)-based bimetallic particles (ZVI/Cu, ZVI/Co, ZVI/Ni, and ZVI/Ag)." RSC Advances 10, no. 47 (2020): 28232–42. http://dx.doi.org/10.1039/d0ra03924a.

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In this study, four different ZVI/M-PMS systems (e.g., ZVI/Cu, ZVI/Co, ZVI/Ni and ZVI/Ag) were fabricated to investigate the removal of contaminants (Rhodamine B, 2,4-dichlorophenol, bisphenol A, bisphenol F, levofloxacin, and chloramphenicol).

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Martinez Bulnes, Ana I., Poornima Shaji, Nirnoy Dan, et al. "Abstract 1038: Novel therapy targeting mutant-KRASG12D and galectin-1 in pancreatic cancer." Cancer Research 82, no. 12_Supplement (2022): 1038. http://dx.doi.org/10.1158/1538-7445.am2022-1038.

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Abstract Introduction: In pancreatic ductal adenocarcinoma (PDAC), low patient survival rate remains a problem. The activating point mutation of KRAS on codon-12 is present in 70-95% of PDAC cases and so far, no success has been achieved to inhibit KRAS. KRASG12D regulates cell proliferation, differentiation, apoptosis; recent preliminary and published studies show high Galectin-1 (Gal-1) levels in both PDAC and stromal cells, which modulate tumor microenvironment and metastasis. Therefore, we have developed a novel combination therapy for PDAC by targeting mutated KRASG12D and Gal-1 to target

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9

Moreno-Bárcenas, Alejandra, Jesús Alejandro Arizpe-Zapata, Julio Alejandro Rivera Haro, Pamela Sepúlveda, and Alejandra Garcia-Garcia. "Jute Fibers Synergy with nZVI/GO: Superficial Properties Enhancement for Arsenic Removal in Water with Possible Application in Dynamic Flow Filtration Systems." Nanomaterials 12, no. 22 (2022): 3974. http://dx.doi.org/10.3390/nano12223974.

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Groundwater is one of the primary sources of water for both drinking and industrial use in northeastern Mexican territory, around 46% of the total, due to the lack of precipitation during the year and solar radiation index. The presence of arsenic in brackish soil and groundwater is a severe health issue, specifically in semi-arid and arid regions in the north of Mexico. Additionally, it represents the only source of drinking water in communities far from big cities, mainly due to the absence of hydric infrastructure. This work presents a new approach to treating polluted water with arsenic. T

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Nuhu, Steven Kuba, and Francis Asokogene Oluwadayo. "The Synthesis of Activated Carbon from Coconut Shell for an Adsorbent Using Iron Chloride." CONTINENTAL J. APPLIED SCIENCES 12, no. 1 (2017): 62–74. https://doi.org/10.5281/zenodo.546470.

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<em>Coconut shell obtained from Chorbe in Jos, Plateau state, Nigeria was carbonized and char formed at a temperature of 655ºC. The char was ground and sieved into different sizes of 7, 14, 25 and -25mm. These sizes were activated using iron chloride solution and then treated with hydrochloric acid, sodium hydroxide and ammonia solution and dried in a furnace to a temperature of 750ºC to increase the pores in each of the sizes. The bulk densities of 7, 14, 25 and -25mm particle sizes were calculated and found to be 0.399, 0.587, 0.619 and 0.383g/cm<sup>3</sup> in that order. While the correspo

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11

Kovbashyn, Vasiliy, and Igor Bochar. "The study of technological peculiarities for improvement of chemical and physico-mechanical properties of reaction-sintered ceramic materials based on molybdenum disilicide." Scientific journal of the Ternopil national technical university 2, no. 106 (2022): 39–46. http://dx.doi.org/10.33108/visnyk_tntu2022.02.039.

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Recommended ways to improve the chemical and physico-mechanical properties of reaction-sintered ceramic materials based on molybdenum disilicide have been described. In order to significantly increase the operating temperatures and change to more stringent operating conditions for ceramic products, it is necessary to improve existing methods of processing ceramics and significantly change the development of new ones. Various means for processing of ceramic materials have been studied and analyzed, which include the introduction of activating additives, hardening with dispersed particles, filam

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Gasanov, B. G., V. G. Perederiy, A. D. Efimov, and S. S. Baev. "INFLUENCE OF THE TWO-STAGE SINTERING MODE ON STRUCTURE FORMATION AND PROPERTIES OF POWDERED ALL-PRESSED BIMETALLIC IRON-BASED MATERIALS." Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional’nye Pokrytiya (Universitiesʹ Proceedings. Powder Metallurgy аnd Functional Coatings), no. 2 (June 18, 2018): 23–34. http://dx.doi.org/10.17073/1997-308x-2018-2-23-34.

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The paper justifies the urgency and efficiency of obtaining bimetallic iron-based materials by two-step isothermal sintering to enable forming the structure of the product bases at the first stage and activating diffusion processes in the wear-resistant layer only at the second stage to eliminate any high-porosity areas and brittle inclusions at interlayer boundaries typical for powder materials doped with carbides, nitrides and borides. The analysis of equation solutions for diffusion in two-component heterogeneous powder systems made it possible to propose an option for determining the time

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13

Yuan, Jiaqiao, Zhan Ding, Yunxiao Bi, Jie Li, Shuming Wen, and Shaojun Bai. "Resource Utilization of Acid Mine Drainage (AMD): A Review." Water 14, no. 15 (2022): 2385. http://dx.doi.org/10.3390/w14152385.

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Acid mine drainage (AMD) is a typical type of pollution originating from complex oxidation interactions that occur under ambient conditions in abandoned and active mines. AMD has high acidity and contains a high concentration of heavy metals and metalloids, posing a serious threat to ecological systems and human health. Over the years, great progress has been made in the prevention and treatment of AMD. Remediation approaches like chemical neutralization precipitation, ion exchange, membrane separation processes, and bioremediation have been extensively reported. Nevertheless, some limitations

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14

Nachbar, Mario, Henrike Wilms, Denis Duft, et al. "The impact of solar radiation on polar mesospheric ice particle formation." Atmospheric Chemistry and Physics 19, no. 7 (2019): 4311–22. http://dx.doi.org/10.5194/acp-19-4311-2019.

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Abstract. Mean temperatures in the polar summer mesopause can drop to 130 K. The low temperatures in combination with water vapor mixing ratios of a few parts per million give rise to the formation of ice particles. These ice particles may be observed as polar mesospheric clouds. Mesospheric ice cloud formation is believed to initiate heterogeneously on small aerosol particles (r<2 nm) composed of recondensed meteoric material, so-called meteoric smoke particles (MSPs). Recently, we investigated the ice activation and growth behavior of MSP analogues under realistic mesopause conditions. Ba

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15

Huang, Jindi, Tao Yi, Jing Li, Mingzhou Li, Fupeng Liu, and Jinliang Wang. "Kinetics Study of the Hydrogen Reduction of Limonite Ore Using an Unreacted Core Model for Flat-Plate Particles." Metals 15, no. 6 (2025): 678. https://doi.org/10.3390/met15060678.

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The iron and steel industry is a major emitter of carbon. In the context of China’s dual-carbon goals, hydrogen-based reduction ironmaking technology has garnered unprecedented attention. It is considered a crucial approach to reducing carbon dioxide emissions in the steel sector and facilitating the realization of carbon neutrality. This work conducted isothermal thermogravimetric analysis on limonite ore in a N2/H2 atmosphere. The influences of reduction temperature, particle size, and hydrogen partial pressure on the hydrogen reduction reaction process of limonite were investigated. Based o

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16

Liu, Jihui, Yaqiang Yuan, Junhong Zhang, Zhijun He, and Yaowei Yu. "Combustion Kinetics Characteristics of Solid Fuel in the Sintering Process." Processes 8, no. 4 (2020): 475. http://dx.doi.org/10.3390/pr8040475.

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In order to systematically elucidate the combustion performance of fuel during sintering, this paper explores the influence of three factors, namely coal substitution for coke, quasi-particle structure and the coupling effect with reduction and oxidation of iron oxide, on fuel combustion characteristics, and carries out the kinetic calculation of monomer blended fuel (MBF) and quasi-granular fuel (QPF). The results show that replacing coke powder with anthracite can accelerate the whole combustion process. MBF and QPF are more consistent with the combustion law of the double-parallel random po

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17

Archuleta, C. M., P. J. DeMott, and S. M. Kreidenweis. "Ice nucleation by surrogates for atmospheric mineral dust and mineral dust/sulfate particles at cirrus temperatures." Atmospheric Chemistry and Physics Discussions 5, no. 3 (2005): 3391–436. http://dx.doi.org/10.5194/acpd-5-3391-2005.

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Abstract. This study examines the potential role of some types of mineral dust and mineral dust with sulfuric acid coatings as heterogeneous ice nuclei at cirrus temperatures. Commercially-available nanoscale powder samples of aluminum oxide, alumina-silicate and iron oxide were used as surrogates for atmospheric mineral dust particles, with and without multilayer coverage of sulfuric acid. A sample of Asian dust aerosol particles was also studied. Measurements of ice nucleation were made using a continuous-flow ice-thermal diffusion chamber (CFDC) operated to expose size-selected aerosol part

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Archuleta, C. M., P. J. DeMott, and S. M. Kreidenweis. "Ice nucleation by surrogates for atmospheric mineral dust and mineral dust/sulfate particles at cirrus temperatures." Atmospheric Chemistry and Physics 5, no. 10 (2005): 2617–34. http://dx.doi.org/10.5194/acp-5-2617-2005.

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Abstract. This study examines the potential role of some types of mineral dust and mineral dust with sulfuric acid coatings as heterogeneous ice nuclei at cirrus temperatures. Commercially-available nanoscale powder samples of aluminum oxide, alumina-silicate and iron oxide were used as surrogates for atmospheric mineral dust particles, with and without multilayer coverage of sulfuric acid. A sample of Asian dust aerosol particles was also studied. Measurements of ice nucleation were made using a continuous-flow ice-thermal diffusion chamber (CFDC) operated to expose size-selected aerosol part

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19

Costa, Dominique, Joelle Guignard, and Henri Pezerat. "Production of Free Radicals Arising from the Surface Activity of Minerals and Oxygen. Part Ii. Arsenides, Sulfides, and Sulfoarsenides of Iron, Nickel, and Copper." Toxicology and Industrial Health 5, no. 6 (1985): 1079–97. http://dx.doi.org/10.1177/074823378900500614.

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The excess incidence of lung cancers observed in metallic mines other than iron mines probably can be correlated not only to radioactivity, but also to dust pollution. The present work investigates the role of surface properties of sulfides and arsenides, which are present in metal mines, in oxidizing mechanisms capable of inducing oxidative stress and, possibly, of participating in carcinogenesis. Using added spin-trapping agent followed by ESR spectroscopy, it was observed that nickel and copper arsenides can be very active in the oxidation of formate or DMSO, by reducing the oxygen dissolve

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20

Chen, Zhiyuan, Jie Dang, Xiaojun Hu, and Hongyan Yan. "Reduction Kinetics of Hematite Powder in Hydrogen Atmosphere at Moderate Temperatures." Metals 8, no. 10 (2018): 751. http://dx.doi.org/10.3390/met8100751.

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Hydrogen has received much attention in the development of direct reduction of iron ores because hydrogen metallurgy is one of the effective methods to reduce CO2 emission in the iron and steel industry. In this study, the kinetic mechanism of reduction of hematite particles was studied in a hydrogen atmosphere. The phases and morphological transformation of hematite during the reduction were characterized using X-ray diffraction and scanning electron microscopy with energy dispersive spectroscopy. It was found that porous magnetite was formed, and the particles were degraded during the reduct

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21

Siddhartha, O. Sai, and S. V. Satyanarayana. "Iron Oxides' Influence on the Thermal Decomposition of Pure Ammonium Perchlorate: A Comprehensive Review." Scholars International Journal of Chemistry and Material Sciences 7, no. 04 (2024): 35–44. http://dx.doi.org/10.36348/sijcms.2024.v07i04.001.

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The combustion of ammonium perchlorate (AP) has long been a focal point in the development of solid rocket propellants, with particular attention paid to the catalytic effects of iron oxides. Beginning in the 1950s, researchers have diligently studied the kinetics and mechanisms underlying AP combustion, with a focus on both micron-sized and nano-sized iron oxide catalysts due to their widespread application in rocket formulations worldwide. This research effort specifically excludes investigations involving alternative iron oxide-based catalysts, such as doped or mixed oxides, or supported ir

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22

Zheng, Heng, Wei Wang, Runsheng Xu, Rian Zan, Johannes Schenk, and Zhengliang Xue. "Effect of the Particle Size of Iron Ore on the Pyrolysis Kinetic Behaviour of Coal-Iron Ore Briquettes." Energies 11, no. 10 (2018): 2595. http://dx.doi.org/10.3390/en11102595.

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High reactivity coke is beneficial for achieving low carbon emission blast furnace ironmaking. Therefore, the preparation of highly reactive ferro-coke has aroused widespread attention. However, the effects of the particle size of iron ore on the pyrolysis behaviour of a coal-iron ore briquette are still unclear. In this study, the effect of three particle sizes (0.50–1.00 mm, 0.25–0.50 mm and <0.74 mm) of iron ore on the thermal and kinetic behaviours of coal-iron ore briquettes were investigated by non-isothermal kinetic analysis. The results showed that the synergistic effect of iron ore

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23

Jones, Gavin, Robert P. van Hille, and Susan T. L. Harrison. "Sulfide Mineral Induced Oxidative Stress as a Limiting Factor in Tank Bioleaching Performance." Advanced Materials Research 71-73 (May 2009): 365–68. http://dx.doi.org/10.4028/www.scientific.net/amr.71-73.365.

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In tank bioleaching, decreasing particle size of milled concentrates has been shown to improve leaching performance owing to increased mineral surface area and mechanical activation effects of fine mineral particles. However, evidence suggests a critical lower limit of particle size distribution exists below which the performance of the thermophilic iron and sulfur oxidizer Sulfolobus metallicus is compromised and complete culture death may result. This paper proposes an explanation for these observations at fine fractions through identifying a relationship between mineral composition of six s

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24

Török, Tamas I., Judit Pázmán, Máté Szabó, and Viktoria Janó. "Laboratory Preparation and Characterization of Electroless Nickel Coated Powders of Industrially Produced Aluminium and Iron(III) Oxides." Materials Science Forum 752 (March 2013): 284–93. http://dx.doi.org/10.4028/www.scientific.net/msf.752.284.

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Small batches of two oxide powders falling in the particle size range of about 30-230 μm were received from industrial sources and were electroless nickel (EN) coated in order to prepare properly modified reinforcing particles for further laboratory experiments with the Laser Melt Injection (LMI) technique to produce particle reinforced steel composite surface layers. The partially calcined alumina (Al2O3) as well as the hydrothermally recycled crystalline iron(III) oxide precipitate were characterized first to check their exact size ranges, specific surface areas and major chemical contaminan

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Duft, Denis, Mario Nachbar, and Thomas Leisner. "Unravelling the microphysics of polar mesospheric cloud formation." Atmospheric Chemistry and Physics 19, no. 5 (2019): 2871–79. http://dx.doi.org/10.5194/acp-19-2871-2019.

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Abstract. Polar mesospheric clouds are the highest water ice clouds occurring in the terrestrial atmosphere. They form in the polar summer mesopause, the coldest region in the atmosphere. It has long been assumed that these clouds form by heterogeneous nucleation on meteoric smoke particles which are the remnants of material ablated from meteoroids in the upper atmosphere. However, until now little was known about the properties of these nanometre-sized particles and application of the classical theory for heterogeneous ice nucleation was impacted by large uncertainties. In this work, we perfo

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Zhang, Xin, Guanghui Li, Mingjun Rao, et al. "Co-Conversion Mechanisms of Boron and Iron Components of Ludwigite Ore during Reductive Soda-Ash Roasting." Metals 10, no. 11 (2020): 1514. http://dx.doi.org/10.3390/met10111514.

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Ludwigite ore is a typical intergrown mineral resource found in China. Reductive soda-ash roasting followed by water leaching is an innovative process for the high-efficiency separation and recovery of boron and iron. In this study, the co-conversion mechanism of boron activation and iron reduction during soda-ash reductive roasting for boron-bearing iron concentrate was clarified. When the boron-bearing iron concentrate was reduced in the presence of Na2CO3, szaibelyite (Mg2(OH)(B2O4) (OH)) was activated to sodium metaborate (NaBO2) and, meanwhile, magnetite (Fe3O4) was reduced to metallic ir

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HU, BEN, ALAN FUCHS, FARAMARZ GORDANINEJAD, and CAHIT EVRENSEL. "NANOSTRUCTURED AND SURFACE POLYMERIZED IRON PARTICLES FOR MAGNETORHEOLOGICAL FLUIDS." International Journal of Modern Physics B 21, no. 28n29 (2007): 4819–24. http://dx.doi.org/10.1142/s0217979207045712.

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A novel magnetorheological fluid, in which the surface of iron particles is coated with poly (butyl acrylate) by surface initiated atom transfer radical polymerization (ATRP), is investigated. The polymer coating procedure includes two steps, which are immobilization of initiator: 2-4(-chlorosulfonylphenyl)-ethytrichlorosilane (CTCS) on the iron particles surface and graft polymerization of butyl acrylate from the surface. The surface coating is characterized by FTIR and SEM. This magnetorheological fluid has controllable off-state viscosity and high shear yield stress. Coating polymer on the

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Ryabykh, Andrey V., Olga A. Maslova, Ekaterina A. Borisova, Mariya A. Akelkina, and Sergey A. Beznosyuk. "Modeling of Antioxidant Complex Particles Based on Ions of 3d Elements and the Active Site of Cytochrome c." Izvestiya of Altai State University, no. 1(141) (April 2, 2025): 67–74. https://doi.org/10.14258/izvasu(2025)1-08.

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The paper presents the computer simulation results of electron transfer process from the superoxide ion to model particles. The model particles are constructed by replacing the iron ion in the active site of cytochrome c with ions of other 3d metals with valence (III), like chromium, manganese, cobalt, and nickel. Bader’s topological analysis of electron density is conducted to analyze model complex particles and characterize the interactions of bonds between central atom and ligands. Using the Marcus theory, the reorganization energies, activation energies, and rate constants of electron tran

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Wang, Guang, Jingsong Wang, and Qingguo Xue. "Kinetics of the Volume Shrinkage of a Magnetite/Carbon Composite Pellet during Solid-State Carbothermic Reduction." Metals 8, no. 12 (2018): 1050. http://dx.doi.org/10.3390/met8121050.

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The volume shrinkage evolution of a magnetite iron ore/carbon composite pellet during solid-state isothermal reduction was investigated. For the shrinkage, the apparent activation energy and mechanism were obtained based on the experimental results. It was found that the volume shrinkage highly depended on the reduction temperature and on dwell time. The volume shrinkage of the pellet increased with the increasing reduction temperature, and the rate of increment was fast during the first 20 min of reduction. The shrinkage of the composite pellet was mainly due to the weight loss of carbon and

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Shakov, A. A., A. N. Maratkanova, A. V. Syugaev, and S. F. Lomaeva. "Chemical modification of iron particles in mechanical activation with polydienes." Protection of Metals and Physical Chemistry of Surfaces 52, no. 1 (2016): 74–80. http://dx.doi.org/10.1134/s2070205116010196.

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31

Ribas, D., M. Černík, J. A. Benito, J. Filip, and V. Marti. "Activation process of air stable nanoscale zero-valent iron particles." Chemical Engineering Journal 320 (July 2017): 290–99. http://dx.doi.org/10.1016/j.cej.2017.03.056.

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Wang, Guilin, Jianliang Zhang, Yaozu Wang, et al. "Study on the Bath Smelting Reduction Reaction and Mechanism of Iron Ore: A Review." Metals 13, no. 4 (2023): 672. http://dx.doi.org/10.3390/met13040672.

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Against the background of low global carbonization, blast furnace ironmaking technology with coking puts huge amounts of pressure on the global steel industry to save energy and reduce emissions due to its high pollution levels and high energy consumption. Bath smelting reduction technology is globally favored and studied by metallurgists as a non-blast furnace ironmaking technology that directly reduces iron ore into liquid metal without using coke as the raw material. The smelting reduction reaction of iron ore, which is the core reaction of the process, is greatly significant to its product

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Lien, H. L., and W. Zhang. "Effect of palladium on the reductive dechlorination of chlorinated ethylenes with nanoscale Pd/Fe particles." Water Supply 4, no. 5-6 (2004): 297–303. http://dx.doi.org/10.2166/ws.2004.0120.

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Direct injection of nanoscale iron particles represents a promising technology for in-situ groundwater remediation. Nanoscale Pd/Fe particles have been shown an excellent performance for degradation of a wide array of contaminants in groundwater. The objective of this study is to investigate the nature of palladium on the reductive dechlorination of chlorinated ethylenes using nanoscale Pd/Fe particles. Kinetics analysis indicated that nanoscale Pd/Fe particles increased dechlorination rates by 1–2 orders of magnitude compared to nanoscale Fe particles alone. XRD analysis and activation energy

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Wei, Rufei, Dongwen Xiang, Hongming Long, Jiaxin Li, and Qingmin Meng. "Effect of mechanical activation on the structure of pulverized coal and iron ore powder." Metallurgical Research & Technology 116, no. 6 (2019): 624. http://dx.doi.org/10.1051/metal/2019045.

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Morphologies and structures of pulverized coal and iron ore powder after mechanical activation were studied by SEM, XRD, FTIR and laser particle sizer. The microcrystalline structure of coal was found to be destroyed by mechanical activation via reducing the pile height and number of layers, and the organic structure of coal was altered through the destruction of the ether bond. Mechanical activation led to distortions and dislocations of the crystal lattice of iron ore, decreasing crystallite size, increasing the grain boundary area, and producing an amorphous phase. These increased the Gibbs

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Pour, Ali Nakhaei, and Fatemeh Dolati. "Activation Energies for Chain Growth Propagation and Termination in Fischer–Tropsch Synthesis on Iron Catalyst as a Function of Catalyst Particle Size." Progress in Reaction Kinetics and Mechanism 41, no. 4 (2016): 371–84. http://dx.doi.org/10.3184/174751916x14701459562861.

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The influence of the catalyst particle size in determining Fischer–Tropsch synthesis (FTS) performance for nano-structured iron catalysts was investigated. The catalysts were prepared by a microemulsion method and to achieve a series of catalysts with different iron particle size, the water-to-surfactant molar ratio (W/S) in the microemulsion system varied from 4 to 12. The results demonstrate that by decreasing the levels of active phase of the iron catalyst, the termination rates for chain growth are increased compared to the propagation rates. In addition, the activation energy for chain pr

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Murakawa, H., CE Bland, WT Willis, and PR Dallman. "Iron deficiency and neutrophil function: different rates of correction of the depressions in oxidative burst and myeloperoxidase activity after iron treatment." Blood 69, no. 5 (1987): 1464–68. http://dx.doi.org/10.1182/blood.v69.5.1464.1464.

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Abstract The polymorphonuclear granulocyte (PMN) kills ingested bacteria by mechanisms that include myeloperoxidase (MPO) and a sudden increase in oxygen consumption (the oxidative burst), both of which are iron dependent. The magnitude of the oxidative burst and activity of MPO were determined in PMNs during the progression of iron deficiency (ID) and following its treatment in rats. As ID developed, the oxidative burst after zymosan activation was less depressed than the activity of MPO. There was no change in the oxidative burst after activation with phorbol myristate acetate (PMA) or in th

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Murakawa, H., CE Bland, WT Willis, and PR Dallman. "Iron deficiency and neutrophil function: different rates of correction of the depressions in oxidative burst and myeloperoxidase activity after iron treatment." Blood 69, no. 5 (1987): 1464–68. http://dx.doi.org/10.1182/blood.v69.5.1464.bloodjournal6951464.

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The polymorphonuclear granulocyte (PMN) kills ingested bacteria by mechanisms that include myeloperoxidase (MPO) and a sudden increase in oxygen consumption (the oxidative burst), both of which are iron dependent. The magnitude of the oxidative burst and activity of MPO were determined in PMNs during the progression of iron deficiency (ID) and following its treatment in rats. As ID developed, the oxidative burst after zymosan activation was less depressed than the activity of MPO. There was no change in the oxidative burst after activation with phorbol myristate acetate (PMA) or in the generat

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38

He, Siqi, Tongjiang Peng, Hongjuan Sun, Dongshan Luo, Qing Xiao, and Qian Geng. "Kinetics of Iron Removal From Ti-Extraction Blast Furnace Slag by Chlorination Calcination." Open Chemistry 17, no. 1 (2019): 1146–56. http://dx.doi.org/10.1515/chem-2019-0124.

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AbstractIn this research, ammonium chloride was used to calcine Ti-extraction blast furnace slag (EBFS) with the aim of removing iron from it. The influences of calcination temperature, ammonium chloride to EBFS mass ratio and particle size on the rates of iron removal were investigated. The results show that the rate of iron removal increased to almost 100% with increases in calcination temperature and the NH4Cl to EBFS mass ratio, but decreased with increases in particle size. Iron is removed in the form of ferric chloride gas, and ammonium chloride can be recycled by recrystallization after

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Karimi, Javanshir, Sayadi, and Arabyarmohammadi. "Arsenic Removal from Mining Effluents Using Plant-Mediated, Green-Synthesized Iron Nanoparticles." Processes 7, no. 10 (2019): 759. http://dx.doi.org/10.3390/pr7100759.

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Arsenic contamination in industrial and mining effluents has always been a serious concern. Recently, nano-sized iron particles have been proven effective in sorptive removal of arsenic, because of their unique surface characteristics. In this study, green synthesis of iron nanoparticles was performed using a mixed extract of two plant species, namely Prangos ferulacea and Teucrium polium, for the specific purpose of arsenic (III) removal from the aqueous environment. Results of UV-visible spectrometry, X-ray powder diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR) analyses

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Si, Junlong, and Fuyong Su. "Multistep Kinetics Study on Hydrogen Reduction of 0.25–0.5 mm Iron Oxide Particles." Processes 13, no. 3 (2025): 893. https://doi.org/10.3390/pr13030893.

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In this paper, the influence factors on the reduction degree of iron oxide were studied through a direct hydrogen reduction thermogravimetric experiment. The results show that the inlet flow rate and temperature both promote the improvement of the reduction degree, and the higher the inlet flow rate and temperature, the shorter the time required for iron oxide to reach the maximum reduction degree. The entire reduction process of iron oxide can be divided into three stages: the Fe2O3 → Fe3O4 stage, Fe3O4 → FeO stage and FeO → Fe stage. The control mechanism of each stage is based on interfacia

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Zhang, Chuan Mei, Jing Jin, Dan Dan He, et al. "Reaction Mechanism Study on Combustion of Micro Nanometer Iron Powder." Advanced Materials Research 535-537 (June 2012): 459–64. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.459.

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Thermogravimetric curves of micro nanometer iron powder’s combustion were studied in different heating rates that were 10K/min, 20 K/min, 30 K/min and 40 K/min, and the particle sizes of iron were 100nm and 20μm. The iron’s kinetic parameters of combustion reaction were calculated by Coats-Redfern integral, differential and Kissinger methods, then the kinetic model was determined and the most probable mechanism function was verified by Popescu method. The results show that different heating rates, particle sizes and calculations can affect kinetic parameters and reaction mechanism. The activat

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Marinca, Traian Florin, Bogdan V. Neamţu, Florin Popa, Ionel Chicinaş, and Olivier Isnard. "Composite Powder and Compacts of Iron/Iron Oxide Type Produced by Mechanosynthesis and Reactive Sintering." Solid State Phenomena 216 (August 2014): 29–34. http://dx.doi.org/10.4028/www.scientific.net/ssp.216.29.

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Composite powder of Fe/Fe2O3type was synthesized by mechanical milling using commercially Fe and Fe2O3powders in mass ratio of 35/65. The milling process leads to the powder homogenization, powder activation and formation of some Fe/Fe2O3composite particles. The Fe/Fe2O3composite powder obtained by mechanical milling and the un-milled Fe/Fe2O3mixture were subjected to the reactive sintering procedure in argon atmosphere at 1100 °C for 6 hours. The sintering procedure promotes the reaction of the Fe with the Fe2O3and the result is a sintered composite compact of Fe/Fe3O4/FeO type. The microstru

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Walker, G. M., G. Connor, and S. J. Allen. "Kinetics of Iron (II) Removal from Aqueous Solution Using Activated Dolomite." Open Chemical Engineering Journal 1, no. 1 (2007): 23–29. http://dx.doi.org/10.2174/1874123100701010023.

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Experimental investigations were undertaken in batch kinetic systems, for the removal of iron (II) from aqueous solutions using activated dolomite. The effect of the extent dolomite activation on the dissolution of magnesium and calcium from the dolomite lattice was determined. Under optimum experimental conditions there was a direct linear relationship between magnesium dissolution and iron (II) removal from bulk solution. The experimental data were mathematically described using empirical external mass transfer and pseudo-intra-particle diffusion models. The data show conformity with a three

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Parno, Rahman, Amir-Hussain Meshkatee, Elham Mobarak Hassan, Nasim Hossein Hamzeh, Maggie Chel Gee Ooi, and Maral Habibi. "Investigating the Role of the Low-Level Jet in Two Winters Severe Dust Rising in Southwest Iran." Atmosphere 15, no. 4 (2024): 400. http://dx.doi.org/10.3390/atmos15040400.

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The dust storms with local and non-local dust sources mostly affect Khuzestan province in southwest (SW) Iran. In this study, the role of the low-level jet in the activation of the internal dust events in SW Iran during two severe dust cases was investigated. For this purpose, the fifth-generation ECMWF reanalysis for the global climate and weather (ERA5) data was used to identify the synoptic patterns and the low-level jet (LLJ) characteristics in the study area. Furthermore, the images of the moderate resolution imaging spectroradiometer (MODIS) sensor, the outputs of the hybrid single-parti

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Hennig, Till L., Harald Unterweger, Stefan Lyer, Christoph Alexiou, and Iwona Cicha. "Magnetic Accumulation of SPIONs under Arterial Flow Conditions: Effect of Serum and Red Blood Cells." Molecules 24, no. 14 (2019): 2588. http://dx.doi.org/10.3390/molecules24142588.

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Magnetic drug targeting utilizes an external magnetic field to target superparamagnetic iron oxide nanoparticles (SPIONs) and their cargo to the diseased vasculature regions. In the arteries, the flow conditions affect the behavior of magnetic particles and the efficacy of their accumulation. In order to estimate the magnetic capture of SPIONs in more physiological-like settings, we previously established an ex vivo model based on human umbilical cord arteries. The artery model was employed in our present studies in order to analyze the effects of the blood components on the efficacy of magnet

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Bernal, Susan A., Volker Rose, and John L. Provis. "The fate of iron in blast furnace slag particles during alkali-activation." Materials Chemistry and Physics 146, no. 1-2 (2014): 1–5. http://dx.doi.org/10.1016/j.matchemphys.2014.03.017.

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Kang, Xiangyang, Yanman Li, Wei Li, et al. "Synthesis and Characterization of Sustainable Eco-Friendly Alkali-Activated High-Content Iron Ore Tailing Bricks." Buildings 13, no. 11 (2023): 2743. http://dx.doi.org/10.3390/buildings13112743.

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With the development of urbanization, the demand for bricks continues to increase. However, traditional brick production methods result in significant energy consumption and environmental pollution. In Hebei Province, China, historical mineral extraction activities have left behind substantial iron ore tailings (IOT). With the objective of recycling IOT resources and promoting ecological restoration and sustainable development, the feasibility of producing alkali-activated bricks using iron ore tailings was explored. This study primarily utilized IOT supplemented with ground granulated blast-f

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Zhang, Chen, and Haihao Shi. "The study of isothermal reduction kinetics of Cara Mine by full hydrogen reduction." Journal of Physics: Conference Series 2951, no. 1 (2025): 012092. https://doi.org/10.1088/1742-6596/2951/1/012092.

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Abstract The study investigated the changes in the degree of metallization of Kara iron powder with particle sizes ranging from 0.5-1.7 mm during hydrogen reduction at different temperatures (700-1000°C) and durations (0-100 min). The effective activation energy for the hydrogen reduction of Kara iron ore was calculated using the unreacted nuclear model, and the corresponding reduction kinetics equation was established to obtain the limiting link in the reduction reaction. [1] The results indicated that as the reduction temperature is increased, the degree of reduction of the iron powder incre

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Azie, Obiora, Zachary F. Greenberg, Christopher D. Batich та Jon P. Dobson. "Carbodiimide Conjugation of Latent Transforming Growth Factor β1 to Superparamagnetic Iron Oxide Nanoparticles for Remote Activation". International Journal of Molecular Sciences 20, № 13 (2019): 3190. http://dx.doi.org/10.3390/ijms20133190.

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Conjugation of latent growth factors to superparamagnetic iron oxide nanoparticles (SPIONs) is potentially useful for magnetically triggered release of bioactive macromolecules. Thus, the goal of this work was to trigger the release of active Transforming Growth-Factor Beta (TGF-β) via magnetic hyperthermia by binding SPIONs to the latent form of TGF-β, since heat has been shown to induce release of TGF-β from the latent complex. Commercially available SPIONS with high specific absorption rates (SAR) were hydrolyzed in 70% ethanol to create surface carboxylic acid conjugation sites for carbodi

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Li, Ying, Huiting Chen, Abourehab Hammam, et al. "Study of an Organic Binder of Cold-Bonded Briquettes with Two Different Iron Bearing Materials." Materials 14, no. 11 (2021): 2952. http://dx.doi.org/10.3390/ma14112952.

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The aim of this study was to investigate the properties of an organic binder used in cold-bonded briquettes (CBBs) prepared from two different iron bearing materials. The applied binder is a type of starch as indicated by chemical analysis, iodine-starch staining and Fourier transform infrared analyses. Thermogravimetric differential scanning calorimetry showed that the binder pyrolysis undergoes four stages: moisture desorption, ash volatilization, pyrolysis of organic matter and decomposition of materials with high activation energy. The difference between the dry and heat-treated samples du

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