Preparation and application of sustained-release potassium ferrate(vi)

In this study,a composite system for the sustained release of potassium ferrate(vi) (sustained-release keo was prepared and applied for water treatment. the objective of this research was to maximize the effectiveness of keofor water treatment by enhancing its stability using diatomite. the sustained-release keowas characterized using x-ray diffraction,scanning electron microscopy,and fourier transform infrared spectroscopy. the results indicated that no new crystal phase was formed during the preparation and some keocrystals entered the pores of the diatomite. from keorelease experiments,we found that the decomposition rate of keowas obviously decreased,which greatly improved the contact rate between released keoand pollutants. via degradation of methyl orange,which was used as a model pollutant,the influential factor of keocontent within the complete sustained-release keosystem was studied. the optimal keocontent within the sustained-release keosystem was approximately 70%. in natural water samples,sustained-release keoat a dosage of 0.06 g/l and with a reaction time of 20 minutes removed 36.84% of soluble microbial products and 17.03% of simple aromatic proteins,and these removal rates were better than those observed after traditional chlorine disinfection. © 2014 xuan xu et al.