Study on adsorption of Uranium by insolubilized humic acid

Influence of insolubilized humic acid on adsorption of hexavalent uranium was mainly investigated in this study.Effects of reaction time,pH,concent rations of IHA and concentrations of UO2+2 etc on the adsorption of U(Ⅵ) were examined while the optimum reaction conditions were determined.The results revealed that the removal rate of uranium by insolubilized humic acid was more than 96% in the uranium solution of above 4.79×10-5 mol·L-1 and the pH≈7.0.When the concentrations of was 1.60×10-4 mol·L-1,the dosage of IHA was about 0.015 g,the saturated adsorption could be reached.The pH value,amount of IHA,concentrations of uranium and the reaction time all had considerable influence on the adsorption.The research indicated that the adsorption reaction was one order,met the Freundlich equation.