When the concentrate of co-existing ion was far in excess of the concentrate of Cr~ 6+ , the influence of Zn~ 2+ on Cr~ 6+ adsorption effect was closed to zero, but the adsorption efficiency of Pb~ 2+ on Cr~ 6+ was increased.

• 共存离子的质量浓度远大于Cr6+时,Zn2+基本没有影响,Pb2+却能提高对Cr6+的吸附效率。