Comment: |
TAO extract of W1 sample dissolved 0.88 mg Fe/g sample [PSDW92], assumption that was derived from a poorly crystalline iron oxide phase similar to ferrihydrite, calculated U sorption less than the observed experimentally for W1 sample, although predicted adsorption by ferrihydrite near pH 6 was significant; original reaction equation in the study: »Fe(s)-(OH)2 + UO2<2+> + H2CO3 = »Fe(s)-O2-UO2CO3<2-> + 4 H<1+> with logK = -13.03, formation constant in aqueous solution: H2CO3 = CO3<2-> + 2H<1+> logK = 16.683 [DK01] |