Uranium Adsorption Properties of Hydrous Titanium Oxides in Seawater

Abstract

Some characters on micro structure and chemical composition of hydrous titanium oxide (HTO) and its granules crosslinked with polyacrylic acid hydrazide (PAH) were measured. And by using agitated tank system, seawater uranium adsorption properties of HTO and its granules were evaluated. Based on these results, the mechanism of adsorption and the effect of granulation were discussed. Pore diffusion appeared to occur in macro pore and adsorption seemed to occur mainly on inner surface of the macro pore. The pore diffusion coefficient and adsorption capacity of the granulated HTO were found to be little affected by crosslinking or by granule diameter. With increase of granule diameter the liquid-film mass transfer coefficient of the crosslinked granule increased. It was shown that PAH is a binder with good seawater permeability.