FACILE SYNTHESIS OF POLYMER MEMBRANES AND THEIR APPLICATION FOR SALT WATER AND DYE PURIFICATION

Abstract

Ensuring the quality of water resources (especially freshwater) to meet requirements for activities in human life, manufacturing, and environmental aquatic protection is one of the major challenges to countries around the world, mostly developing regions and significantly affected homelands by climate change like Vietnam. Therefore, cleaner production, recycled waste materials, and water purification technologies are essential solutions to apply in industry, production, and life. Water purification technologies by membrane such as permeation membranes, nanofiltration membranes, cation and anion membranes, distillation membranes, diffusion membranes, etc. are being applied more and more widely. In this work, the obtained polymer membranes are synthesized using environmentally friendly and biodegradability materials such as modified starch (PS), polyvinyl alcohol (PVA), and poly acrylic acid (PAA), followed by application for treatment of salted and dyed water. The result shows that as-made polymer membranes have good mechanical properties and durability. Additionally, the treatment efficiency of the diffusion membrane at atmospheric pressure with the NaCl-salted water reaches 84% ​​and contaminated-methylene blue (MB) water reaches 71%. The obtained polymer membranes hold many advantages and potential for use in industrial-scale water purification and treatment technology.