Ultrafiltration of Aqueous Solutions of Food Dye Using Polymeric Membranes Prepared with Surfactants

Abstract

The objective of the study is the low-pressure membrane process for treating aqueous solutions containing synthetic food dye (E104 - quinoline yellow). Dye concentration used was 10% (equivalent to 100g/m3). The pressures used in the ultrafiltration process were 0.1, 0.2 and 0.3 MPa. Experiments were performed in dead - end instalations in which the effectiveness of the polysulfone - alkylbenzyldimethylammonium chloride (PSU-ABDMA) and polysulfone - N-dodecylpyridinium chloride (PSU - NDPCl) were tested. The efficiency of these membranes has been proved by calculating the permeate flow and the retention. Analyzing the experimental data, it was found that for the polysulfone-alkylbenzyldimethylammonium chloride composite membrane the degree of retention is completely different, with high values being obtained for low pressures and low values for high pressures used.

The Influence of ZnO/TiO2 Nanohybrid Blending on the Ultrafiltration Polysulfone Membranes

“…Due to the ability of modifying the parameters in the manufacturing of organic membranes suitable for a specific field of application, few research has been conducted in order to discover or create a new type of special polymer, thus in preponderance the organic membranes are made of the same polymers, most notably being polyether sulfone (PES), polysulfone (PSf), poly (vinylidene fluoride) (PVDF) and cellulose acetate (CA) [8][9][10]. Polysulfone is a special polymer which is used at industrial scale for wastewater treatments, with high thermal, chemical and mechanical stability [11][12][13]. The main drawback for the polysulfone membrane is its low hydrophilicity which causes a stronger interaction with a diversity of solutes that lead to fouling [14].…”