Abstract
To observe the leaching property and its change in valence from the soil intentionally polluted with pentavalent antimony (KSb (OH) 6), extraction tests were performed with pure water and 1M hydrochloric acid (HCL). It was showed that the antimonate was sorbed by soil gradually and strongly, changed their form into insoluble with pure water. After three months from the pollution, extracted fractions of Sb were decreased to 10% in pure water and increased to 40% in 1M HCl, respectively. Sb concentrations in pure water leachate were three orders of magnitude lower than solubility of KSb (OH) 6. Irrespective of leaching solution and initial soil moisture, Sb (V) was the predominant species in soluble fractions.
The results indicated that aging is one of effective factors on increasing 1M HCl soluble Sb (V) and decreasing water soluble Sb (V). Initial soil moisture influenced on extractabilities of these two solutions.
