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Ferritization of industrial waste water and microbial synthesis of iron‐based magnetic nanomaterials from sediments
Author(s) -
Teremova M.I.,
Petrakovskaya E.A.,
Romanchenko A.S.,
Tuzikov F.V.,
Gurevich Yu L.,
Tsibina O.V.,
Yakubailik E.K.
Publication year - 2016
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12368
Subject(s) - ferrihydrite , superparamagnetism , materials science , x ray photoelectron spectroscopy , coprecipitation , precipitation , nanoparticle , magnetite , mössbauer spectroscopy , nanomaterials , magnetic nanoparticles , hematite , chemical engineering , magnetization , nuclear chemistry , analytical chemistry (journal) , inorganic chemistry , environmental chemistry , chemistry , metallurgy , nanotechnology , crystallography , magnetic field , physics , adsorption , quantum mechanics , meteorology , engineering
The precipitation of iron and associated heavy metals in industrial waste water and in model solution using ferritization and aerobic bacterial culture was investigated. Magnetic sediments extractable by magnetic separation (specific saturation magnetization of 16–36.8 G cm 3 /g) were produced by precipitation of iron by ferritization method at рН (8–10) and 60–80°С for 15–30 min. Nanoparticles of ferrihydrite or ferric hydroxide doped with associated metals (Co, Ni) were produced under precipitation of ferric iron in model solution with bacteria at the temperature 26–34°С. The radii of synthesized particles are 1–5 nm and nanoparticles of ferrihydrite are superparamagnetic in both un‐doped and doped (Co, Ni, Zn) sets. Dispersed structure of biogenic nanoparticle sols, their magnetic and other properties were studied by atomic force microscopy, X‐ray small‐angle scattering, X‐ray diffraction, electron magnetic resonance, Mössbauer and X‐ray photoelectron spectroscopy. © 2016 American Institute of Chemical Engineers Environ Prog, 35: 1407–1414, 2016