Sorption of Co(II) on Attapulgite: Effects of Time,Solid-to-Liquid Ratio, pH,Ionic Strength,and Humic Acid

The sorption of Co(Ⅱ) on attapulgite was studied by batch technique.The sorption of Co(Ⅱ) onto attapulgite was strongly dependent on pH,ionic strength,solid-to-liquid ratio,FA,and electrolyte ion.The results indicate that sorption of Co(Ⅱ) onto attapulgite is influenced by ionic strength obviously.The presence of FA reduces the sorption of Co(Ⅱ) at high pH values.The sorption of Co(Ⅱ) on attapulgite is also influenced by the background electrolyte foreign anions at pH8.