Study on the Adsorption of La(III) by Green Tea

Abstract

The adsorption properties of green tea for La(III) in aqueous phase were studied. The results showed that the adsorption effect of the green tea on lanthanum(III) was better over the range of pH 5-7. At 40 ºC, saturation adsorption quantity of the green tea for La³⁺ was 40.18 mg/g and the adsorption accorded with Langmuir isothermal equation. The desorption studies showed when 0.1 mol/L hydrogen chloride was used as adsorbent and the desorptive time was 3 h, desorptive ratio achieved 87.02 %. The good effect of desorption was attained.