[Adsorption behavior and mechanisms in dual-solutes of Pb2+ and p-nitrophenol by organobentonites].

The sorption behavior for organobentonites to sorb organic pollutants from metal-organic pollutant systems were investigated. The results suggested that in organobentonite/Pb2+/p-nitrophenol solute systems, Pb2+ can slow the sorption velocity of organobentonite to adsorb p-nitrophenol from water. Pb2+ and p-nitriphenol exhibit a competitive effect. The competitive effects were relevant to ration of p-nitrophenol and Pb2+ and adsorption mechanisms of organobentonites. Bentonite modified with TMAB adsorbing contaminants primarily by an adsorption process, and the process exhibits a stonger competitive effect in multi-solute systems.