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분리막을 이용한 천일염내 불순물 및 미세플라스틱 제거에 관한 연구
임시우,서채희,홍승관,김정훈,Lim, Si-Woo,Seo, Chae-Hee,Hong, Seung-Kwan,Kim, Jeong-Hoon 한국막학회 2022 멤브레인 Vol.32 No.5
This study is aimed to design a membrane process that systematically removes contaminants including microplastics in sun-dried salt using a separation membrane. In this study, we selected the separation membrane material, pore size, and module suitable for the sun-dried salt fields, and proceeded with the experiments under the salt fields and laboratory conditions. A pilot plant was constructed and tested in our lab and in the actual saltern with the selected 200 kDa, 4 kDa ultrafiltration membranes, and 3 kDa nanofiltration membranes. Most of the impurities in the sea salt were 0.1 ㎛ in size, and more than 7 types of various microplastics were detected in the impurities. After that, as a result of checking the filtered water through the separation membrane process, no impurities were detected. As a result of comparing the existing sea salt component and the sea salt component prepared with separation membrane filtrate, impurities were effectively removed without change in the sea salt component.
임시우,박채영,박보령,안이삭,김정훈 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
The PEG-based polymer membrane has excellent CO2 solubility and shows high potential for CO2 separation. In this article, P (MMAPEGMA- BC) (MPC) terpolymers with azide groups were synthesized by free radical polymerization using methylmethacrylate (MMA), poly (ethyleneglycol) methylmethacrylate (PEGMA), and vinylbenzyl chloride (VBC). The crosslinked MPA (C_MPA) membrane was prepared by heat treatment of MPA at 185℃ for 6 hours. The synthesis of terpolymers and membranes and their thermal properties were confirmed by 1H-NMR, FT-IR, DSC and TGA analysis. XRD analysis revealed that an amorphous C_MPA membrane without a crystalline pattern was fabricated. The polymer membranes were evaluated through the gas permeability properties (CO2, CO, and N2) at 35℃.