Results 21 to 30 of about 235,275 (302)

Comprehensive evaluation of manganese oxides and iron oxides as metal substrate materials for constructed wetlands from the perspective of water quality and greenhouse effect

Ecotoxicology and Environmental Safety, 2021
Manganese oxides and iron oxides have been widely introduced in constructed wetlands (CWs) for sewage treatment due to their extensiveness in nature and their ability to participate in various reactions, but their effects on greenhouse gas (GHG ...
Shiyi Cheng, Congli Qin, Huijun Xie, Wenxing Wang, Jian Zhang, Zhen Hu, Shuang Liang   +6 more
doaj   +1 more source

Kinetics of reduction and oxidation reactions during pyrometallurgical metal extraction [PDF]

, 2017
The article deals with a sophisticated approach to the study of basic kinetic dynamic process in metal production. It is concerned with three agendas: study of reduction reactions of iron oxides and carbon as reducing agents with secondary created oxides;
Bilík, Jiří, Brožová, Silvie, Jursová, Simona, Pustějovská, Pavlína   +3 more
core   +1 more source

Iron oxides as efficient sorbents for CO2 capture

Journal of Materials Research and Technology, 2019
Carbon dioxide capture/release reactions using magnetite, Fe3O4, and hematite, Fe2O3, as sorbents were studied. Kinetics of mechanically activated chemical reactions between iron oxides and CO2 was investigated as a function of CO2 pressure and planetary
Eduin Yesid Mora Mendoza, Armando Sarmiento Santos, Enrique Vera López, Vadym Drozd, Andriy Durygin, Jiuhua Chen, Surendra K Saxena   +6 more
doaj   +1 more source

Pedogenic Forms of Iron in Soils Developed from Four Parent Materials

Journal of Tropical Soils, 2020
Information on the distribution of various forms of iron in soils are valuable in the study of soil genesis. The objective of this study was to to evaluate the pedogenic forms of iron in soils developed over basement complex and basaltic parent materials
Ayodele Owonubi
doaj   +1 more source

Synthesis and heating effect of iron/iron oxide composite and iron oxide nanoparticles [PDF]

SPIE Proceedings, 2007
Fe/Fe oxide nanoparticles, in which the core consists of metallic Fe and the shell is composed of Fe oxides, were obtained by reduction of an aqueous solution of FeCl3 within a NaBH4 solution, or, using a water-in-oil micro-emulsion with CTAB as the surfactant.
Q, Zeng, I, Baker, J A, Loudis, Y F, Liao, P J, Hoopes   +4 more
openaire   +2 more sources

Corrosion Behavior of Pipeline Carbon Steel under Different Iron Oxide Deposits in the District Heating System

Metals, 2017
The corrosion behavior of pipeline steel covered by iron oxides (α-FeOOH; Fe3O4 and Fe2O3) was investigated in simulated district heating water. In potentiodynamic polarization tests; the corrosion rate of pipeline steel is increased under the iron oxide
Yong-Sang Kim, Jung-Gu Kim
doaj   +1 more source

Mercury removal in wastewater by iron oxide nanoparticles [PDF]

, 2016
Mercury is one of the persistent pollutants in wastewater; it is becoming a severe environmental and public health problem, this is why nowadays its removal is an obligation.
C Hincapié, E Vélez, F Jaramillo, G E Campillo, G Morales, J I Uribe, J Osorio, Le T T T, Mayo J T, O Arnache   +9 more
core   +2 more sources

Modeling the iron oxides and oxyhydroxides for the prediction of environmentally sensitive phase transformations

, 2011
Iron oxides and oxyhydroxides are challenging to model computationally as competing phases may differ in formation energies by only several kJ/mol, they undergo magnetization transitions with temperature, their structures may contain partially occupied ...
A. F. Gualtieri, Amanda S. Barnard, C. Kittel, D. C. Golden, Haibo Guo, J. F. Nye, J. Majzlan, K. M. Rosso, R. M. Cornell, T. M. Henderson, T. Nagai   +10 more
core   +1 more source

A revised scheme for the reactivity of iron (oxyhydr)oxide minerals towards dissolved sulfide [PDF]

, 2004
The reaction between dissolved sulfide and synthetic iron (oxyhydr)oxide minerals was studied in artificial seawater and 0.1 M NaCl at pH 7.5 and 25°C. Electron transfer between surface-complexed sulfide and solid phase Fe(III) results in the oxidation ...
Bartlett, Berner, Biber, Bigham, Bondietti, Borggaard, Canfield, Canfield, Canfield, Canfield, Canfield, Carlson, Chambers, Chen, Cline, Cornell, Cornell, Crosby, Davis, Dos Santos Afonso, Fitzpatrick, Fredrickson, Fuller, Gagnon, Haese, Hering, Heron, Hurtgen, Jørgensen, Kostka, Krom, Krom, LaKind, Litter, Lovley, Lovley, Luther III, Luther III, Michael D. Krom, Millero, Morse, Morse, Morse, O’Brien, Peiffer, Postma, Poulton, Poulton, Poulton, Poulton, Pyzik, Raiswell, Raiswell, Rickard, Robert Raiswell, Roden, Rysgaard, Schwertmann, Schwertmann, Schwertmann, Schwertmann, Sidhu, Simon W. Poulton, Stolz, Stookey, Stucki, Stumm, Suter, Taylor, Thamdrup, Thamdrup, Torrent, Urban, Viollier, West, Yao, Zhang, Zinder   +77 more
core   +1 more source

Effects of Basicity and MgO in Slag on the Behaviors of Smelting Vanadium Titanomagnetite in the Direct Reduction-Electric Furnace Process

Metals, 2016
The effects of basicity and MgO content on reduction behavior and separation of iron and slag during smelting vanadium titanomagnetite by electric furnace were investigated.
Tao Jiang, Shuai Wang, Yufeng Guo, Feng Chen, Fuqiang Zheng   +4 more
doaj   +1 more source