Influence of Physicochemical Parameters of Organic Solutes on the Retention and Flux in a Nanofiltration Process

Abstract

A comparative study of several organic compounds (atrazine, aniline and phenol, and their derivatives, 4-chlorophenol, 4-nitrophenol and 4-nitroaniline) and their removal from aqueous solutions by nanofiltration using an NF-97 polyamide membrane is presented. The aim was to ascertain any correlation between the physicochemical parameters of the different compounds and the characteristic parameters of the nanofiltration system (permeate flux and rejection coefficient), in order to understand the behavior of the nanofiltration membrane separation processes and any relevant variables. In a previous work, the rejection coefficients and permeate flux values for phenol, 4-chlorophenol, aniline, and atrazine were obtained. These values were used together with the new ones presented for 4-nitroaniline and 4-nitrophenol.

Removal of Different Dye Solutions: A Comparison Study Using a Polyamide NF Membrane

“…The best correlation for the rejection coefficient was obtained using the molar refractivity and the water solubility of the compound simultaneously. For permeate flux, the best correlation value was obtained using the surface tension and molecular weight [ 14 ].…”

Impact of Solute Properties and Water Matrix on Nanofiltration of Pesticides

“…Other methods include air stripping, ozonation, and advanced oxidation, which all have their own limitations. Membrane technology, therefore, represents an innovation which has the potential for overcoming these limitations .…”

Biodiesel Purification Using Polymeric Nanofiltration Composite Membranes Highly Resistant to Harsh Conditions

“…There are several factors involved in the MWCO determinations when the solute rejection technique is used, e.g., interactions between the solutes/solvent/membrane materials; size, charge, and shape of the molecules; swelling effect; etc. Several studies have been reported in order to establish characteristic parameters of the ultrafiltration (UF) and NF systems, namely, permeate flux and rejection coefficient . From these experimental observations it was clear that the solute rejection was strongly dependent on both the type of solvent and the membrane.…”