TỔNG HỢP VÀ ĐẶC TRƯNG MÀNG CA/PDA ỨNG DỤNG XỬ LÝ CHÌ (II) TRONG MÔI TRƯỜNG NƯỚC

Tóm tắt

   Cellulose acetate membrane was successfully synthesized by phase inversion method using cellulose acetate (CA) prepared from sugarcane bagasse. The CA/polydopamine (PDA) membrane was also prepared by coating PDA nanoparticles on the walls of internal pores and on the surface of CA membrane. The membrane parameters were evaluated through water flux and contact angle. The obtained membranes have been characterized by FT-IR/ATR, SEM, DTA-TGA. The experimental isotherm data were analyzed using Freundlich and Langmuir isotherm models. The obtained results show that modifying CA membrane by decorating PDA nanoparticles exhibited favorable permeability and high adsorption capacity for Pb2+ in aqueous solution. Particularly, CA/PDA membrane performed maintainable pure water flux (137.6 L/m2h). The adsorption capacity for Pb2+on CA/PDA membrane was 85.47 mg/g. Hence, coating PDA nanoparticles on the CA membrane is an effective approach to improve the membrane performance for heavy metals removal. Keywords: Cellulose acetate, dopamine, CuSO4/H2O2, polydopamine, adsorption membrane.