Studies on the batch foam fractionation behaviors of trace cetyl pyridinium chloride and sodium dodecyl benzene sulfonate in aqueous solution

The effects of the key independent variables on the batch foam fractionation behaviors of CPC and SDBS have been investigated,and the optimal experimental conditions for foam fractionation were established.The comparison and evaluation of foam fractionation efficiency between the small volume sample in short column and the large volume sample in long column have been discussed.All experimental conclusions are useful for industrial treatment of waste water and recycling of trace components.On the basis of the experiments,the concepts of Critical Foam Concentration(CMC) and Efficient Concentration Extent for Foam Fractionation(ECEFF) have been suggested to guide flotation of surface-active agents from aqueous solution.Foam fractionation behaviors,surface activity and ECEFF have been compared between CPC and SDBS,and the reasons from which differences resulted are discussed.