Water disinfection using hydrogen peroxide with fixed bed hematite catalyst - kinetic and activity studies.

A lab-scale reactor with a fixed-bed hematite catalyst for the effective decomposition of HO and bacteria inactivation was designed. The bactericidal effect is the largest at a low initial bacterial count of 2·10 CFU/L, which is typical for natural surface waters. When using a 5 mM HO solution and a residence time of 104 min, the reduction in the number of E.

Magnesium-zinc ferrites as magnetic adsorbents for Cr(VI) and Ni(II) ions removal: Cation distribution and antistructure modeling.

The magnesium-zinc ferrites MgZnFeO (x = 0…1) were studied as magnetic sorbents for environmental applications. Low-temperature Mössbauer spectroscopy was used to determine the distribution of magnesium and ferric ions in the spinel crystal lattice. The influence of Zn content on magnetic parameters was investigated on the basis of VSM data.