Study on Absorption of Cu~(2+) by Inorganic Colloid of Brown Desert Soil in Xinjiang

This paper chose typical brown desert soil from Aksu,Xinjiang,studied the absorption of Cu2+ by inorganic colloid,the results as follows: Isothermal adsorption curve of copper absorbed by brown desert soil can match with Langmuir equation well,after desorption the relationships between original Cu2+ concentration and remainder Cu2+content in colloid was a linear function.With the increasing of electrolyte strength,the absorption quantity of Cu2+ by colloid decreases gradually;Different compounded negative ion and positive ion have different influence on copper absorbed by colloid.When negative ion is Cl-only in solution,the order of the influence on copper absorption is K+NH4+ Na+.SO42-on copper absorption is higher than that of Cl-.