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http://dx.doi.org/10.14579/MEMBRANE_JOURNAL.2022.32.5.314

Removal of Harmful Impurities Including Microplastics in Sun-Dried Sea Salt by Membrane Technology  

Lim, Si-Woo (C1 Gas & Carbon Convergent Research Center, Korea Research Institute of Chemical Technology)
Seo, Chae-Hee (C1 Gas & Carbon Convergent Research Center, Korea Research Institute of Chemical Technology)
Hong, Seung-Kwan (School of Civil, Environmental and Architectural Engineering, Korea University)
Kim, Jeong-Hoon (C1 Gas & Carbon Convergent Research Center, Korea Research Institute of Chemical Technology)
Publication Information
Membrane Journal / v.32, no.5, 2022 , pp. 314-324 More about this Journal
Abstract
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.
Keywords
sea salt; membrane; process design; microplastic; impurity treatment;
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Times Cited By KSCI : 1  (Citation Analysis)
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