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The paper reported the adsorption capacity of hexavalent chromium Cr(VI) in aqueous solutions with three agricultural waste by five awns (PE), corn stalks (CM), peanut shells (HS) and prepared the adsorbent by carbonization at 550°C. A series of adsorption experiments were performed to investigate the effect of Cr(VI) concentration, contact time. The results indicated that peanut shells (HS) have a higher removal rate than the other two materials. The Langmuir and Freundlich adsorption isotherm models are used to describe the adsorption process. The adsorption isotherm of Langmuir well explained the balance mechanism and the research showed that adsorption conformed to the pse-second kinetic model.

The adsorption performance of hexavalent chromium Cr(IV) in aqueous with three biomass carbons materials