Removal of anilinic compounds using the NF-97 membrane: Application of the solution-diffusion and SKK models

ABSTRACT

In the present work, the characterization of the polyamide membrane NF-97 has been carried out studying its behaviour in the treatment of effluents that contain anilinic compounds. High rejection coefficients with a maximum value of 94.72% for aniline, 79.83% for 4-chloroaniline, and 63.63% for 4-nitroaniline were obtained with operating pressures of about 30 bar and pH values between 3 and 4. The fouling parameter based on solute permeate flux was higher than that for the solvent permeate flux and higher for magnesium chloride. Lastly, experimental data were fitted to the Solution-Diffusion model and to the simplified model of Spiegler–Kedem–Katchalsky.

KEYWORDS:

• Anilinic compounds
• nanofiltration
• SKK-model
• solution-diffusion model

Acknowledgments

M.D. Murcia was beneficiary of Juan de la Cierva scholarship from MICINN.