Effect Of Phenol And Aniline On Adsorptive Micellar Flocculation

Based on the flocculation characteristics of anionic surfactants on aluminum salt, adsorptive micellar flocculation (AMF) is a method for the removal of surfactants and pollutants from water. This paper investigates the removal of phenol and aniline by AMF and the influence of phenol and aniline on AMF of the anionic surfactants sodium dodecyl sulfate (SDS) and sodium dodecylbenzene sulfonate (SDBS) with AICl3 by pH,ζpotential, surface tension y, Z-average size, conductivityκand so on. This work provides the experimental reference for separation of soluble organic by micelle flocculation.In this paper, the optimum coagulation molar ratios of A13+-SDS arid Al3+-SDBS were determined by experimental data. Then fixed the molar ratios of A13+-SDS and Al3+-SDBS, the characteristic of AMF was studied through changing concentration of phenol, aniline (0-2000 mg/L). The results indicate that:With the increasing molar ratios of A13+-SDS and A13+-SDBS, the aggregates seemed to disappear gradually and finally completely disappeared only in system of A13+-SDS, but not observed in the system of A13+-SDBS. With the increasing molar ratios of A13+-SDS and A13+-SDBS, Zeta potential approached to 0, then observed charge inversion in the system of Al3+-SDS, but not observed in the system of A13+-SDBS. With the increasing molar ratios of A13+-SDS and A13+-SDBS, surface tension decreased and finally reached a plateau in the system of A13+-SDS. however, surface tension increased and finally reached a plateau in the system of A13+-SDBS. The optimum coagulation molar ratios of A13+-SDS and A13+-SDBS were around 0.35 and 1.25 respectively. With the increasing concentration of phenol, pH value of coagulation system was around 3.5, the major forms is Al+in the solution. Phenol may adsorb as complexes within the Stern-diffuse layer due to the excesses of Al3+, and could be removed by the flocculation of micelles by Al3+, the removal rate is about 40%-50%. the flocculation is only slightly affected by the presence of phenol. With the increasing concentration of aniline, the large aggregates disappeared was observed in the experiment. very small amounts of polar organic compound aniline have great effects on the flocculation of surfactant micellar, the existence of aniline inhibits the formation of flocculation. As the concentration of aniline is lower than 100 mg/L, the removal rate is 90%, and reduces with the increasing concentration of aniline.