KAGAKU KOGAKU RONBUNSHU, Vol.24, No.6, 969-971, 1998
Effects of dissolved salts on silica removal from geothermal brine by seeding method using silica gel
Model geothermal brines based on a component of dissolved salts in the actual geothermal brines were used, and the effect of dissolved salts on the silica removal performance by a seeding method using silica gel is experimentally examined. Potassium and sodium ions increase the silica supersaturation degree by their salt out effects, and as a result promote silica removal. Calcium and ferric ions promote silica removal by production of their silicates in addition to the salt out effect. Boric acid has little effect on silica removal.