نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه آموزشی مهندسی شیمی دانشگاه اراک
2 عضو هیئت علمی گروه مهندسی شیمی دانشگاه اراک
3 گروه آموزشی شیمی دانشگاه اراک
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this research, nanofiltration membranes based on polyethersulfone were made by phase inversion method. Then a surface modification using synthesized nanoparticles was used to improve the hydrophilicity of membranes. The effect of surface modification on separation and antifouling properties was evaluated. FTIR, ATR, SEM and AFM analyzes were used to identify nanoparticles and check the morphology of the membranes. Surface contact angle, antifouling properties, flux, salt rejection and lead removal have also been performed to evaluate the performance of prepared membranes. According to the results, the Na2SO4 rejection has increased from 52% for pristine membrane to 81% for M6 membrane (membrane modified with 0.1% by weight of nanoparticles) the amount of lead removal also has increased from 41% related to the pristine membrane to 87% related to the M6 membrane. The water contact angle of the membrane surface decreased from 63◦ for the pristine membrane to 18◦ for the M6 membrane, which indicates an increase in the hydrophilicity of the membranes after modification. A significant increase in the flux recovery ratio (from 28% for the pristine membrane to 71% for the M6 membrane) also indicates the improvement of the antifouling properties after the membrane modification. The M6 membrane provided the lowest contact angle, highest rejection of salt and lead metal along with an acceptable flux. According to the obtained results from this research, membranes modified by synthesized nanoparticles with tris (hydroxymethyl) amino methane can be effectively used in the membrane separation process.
کلیدواژهها [English]