The competitive effects were relevant to C ? pb and sorption mechanisms of organobentonites. The sorption behaviors for organobentonites to sorb organic pollutants from multi-solutesystems were investigated.

• Pb~(2+)与p-硝基苯酚产生竞争吸附，竞争作用的大小与溶液中p-硝基苯酚和Pb~(2+)的质量浓度比C_(酚/Pb)以及有机膨润土对污染物的吸附机制有关，在以表面吸附为主的有机膨润土上竞争吸附表现更强。