막분리 공정을 이용한 기능성 미네랄수의 제조에 관한 연구

Abstract

Vanadium is considered to possess insulin-mimetic actions not only in animal models of diabetes mellitus but also in the cases of type 1 diabetes and type 2 diabetes. Silica in drinking water may reduce the risk of developing Alzheimer disease. The purpose of the study is to produce the functional mineral (vanadium and silica) water from Jeju groundwater using nanofiltration (NF), and reverseosmosis (RO) processes, respectively. Groundwater samples were taken from Seogwipo, Ayum, Wahyul, and Namwon groundwater wells with different in vanadium content each other. Their vanadium concentrations were 53.0, 44.5, 31.8, and 10.2 ppb, respectively. In this study, three different commercial RO membrane modules ( BW30-2540, RE2540-TE, and XLE-2540) and two different commercial NF membrane modules (NE2540-90 and NF90-2540) were used for the concentration of vanadium and silica. The membrane characteristics test results showed that NE2540-90 module was the most efficient because of higher permeate flux and similiar rejection coefficient. Using NE2540-90 module at the transmembrane pressure of 8 kgf/cm2, it was found that the rejection coefficients of vanadium, silica, aluminium, chromium, iron, boron, strontium, and barium were 98.2%, 99.0%, 92.0%, 83.6%, 96.0%, 45.1%, 98.6%, and 69.5%. It was possible that vanadium contents of Seogwipo, Ayum, Wahyul, and Namwon groundwater were concentrated into 148.9, 122.9, 89.2, and 50.8 ppb, respectively, by 5 or 6 stages treatment at the recovery ratio of 15～20%. And these concentrated groundwater did not exceed the permissible drinking water standards, because of the purity of Jeju groundwater. The waters produced by NF or RO, which are enriched in vanadium and silica content, are expected to be commercialized into the various functional mineral waters.