Concentration of Dissolved Organic Matter in Lake Water by Reverse Osmosis

Abstract

The reverse osmosis for concentration of dissolved organic matter in lake water has been examined.Recovery of dissolved organic matter as organic carbon was determined using glucose, saccharose, glycine, glycyl glycylglycine, sodium acetate, and disodium EDTA. The results suggested that dissolved organic matter having a molecular weight of more than 200 may be effectively concentrated with recovery of more than 90% when about 10-liter samples are reduced to one-fifth at 6kg/cm² for 40 to 54 minutes.
When 20 to 50l of lake water samples, which were taken in Lake Kasumigaura during spring to summer and passed through a Whatman GF/C glass fiber filter, were reduced to 1.5to 2 l, 63 to 93% of the dissolved organic matter were recovered as organic carbon.