Potassium Ferrite (KFeO2): Synthesis, Decomposition, and Application for Removal of Metals

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F15%3A33155532" target="_blank" >RIV/61989592:15310/15:33155532 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1166/sam.2015.2143" target="_blank" >http://dx.doi.org/10.1166/sam.2015.2143</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1166/sam.2015.2143" target="_blank" >10.1166/sam.2015.2143</a>

Result language
angličtina
Original language name
Potassium Ferrite (KFeO2): Synthesis, Decomposition, and Application for Removal of Metals
Original language description
Potassium ferrite (KFeO2) was synthesized by a new simple thermal process from natural waste ferrihydrite and KNO3 precursors. The synthesized KFeO2 showed considerable instability when it was in contact with water and CO2 of the humid air. The decomposition of KFeO2 followed first-order kinetics with rate constants as 0.93 x 10(-1) h(-1) and 1.86 x 10(-1)h(-1) at relative humidity of 30-35% and 65-70%, respectively. The products of decomposition, crystalline KHCO3 and nanocrystalline iron(III) oxides in the molar ratio of 2:1, were characterized in detail by X-ray powder diffraction, low-temperature and in-field Fe-57 Mossbauer spectroscopy, magnetization (SQUID) measurements, thermal analysis, and scanning and transmission electron microscopy. Washing and subsequent air drying of the decomposed products of KFeO2 yielded monodisperse superparamagnetic maghemite (gamma-Fe2O3) nanoparticles, which turned out to be efficient as magnetic sorbents for removing Cu2+ in water. A direct addit
Czech name
—
Czech description
—

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
—

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)