چكيده به لاتين
Due to technological progress and need of people to an environment without any pollution, the separation systems are continually in progress. Achieve high efficiency, desirable selectivity and low power consuming are the main goals of designing these systems. In recent years, the use of supported liquid membrane (SLM) has been highly considered In order to remove pollutants from aqueous solutions. In the present investigation, the extraction of Malachite Green (MG) dye from aqueous environment was studied by using supported liquid membrane based on experimental design. D2EHPA/M2EHPA, sunflower oil and acetic acid are used as carrier, Diluent and strip phases, respectively. The influence of operating parameter (feed pH, feed concentration, carrier concentration and acid concentration on strip phase) on extraction percentage was studied and optimized. The optimum condition in order to Extraction of MG dye is determined in feed pH 10, initial concentration 135 mg/l, carrier concentration 22% V/V, acetic acid concentration 6 M and agitator speed 600 rpm at 10 hours. Under these circumstances, the extraction percentage of the malachite green dye and system stability are measured 93.154% and 40 h, respectively. Furthermore, the influence of presence of hydrophilic Tio2 and hydrophobic Sio2 nanoparticles at different concentration in the membrane on the extraction percentage and system stability are investigated. Hydrophobic Sio2 nanoparticles cause to improve the system performance. By using 5 mg/ml at organic membrane phase the extraction percentage and system stability increased to 99.07% and 70 hours, respectively.
Keywords: liquid membrane supported, Malachite Green, Experiment design, dye, Nanoparticle.
