SELECTIVE FLUORIDE AND AMMONIA REMOVAL BY CHROMATOGRAPHIC SEPARATION OF WASTEWATER

摘要

A process of fluoride removal from wastewater streams produced during industrial operation for further industrial use or to comply with environmental regulations. The process segregates the removal of fluoride and fluorosilicate ions, from the totality of ions in the wastewater stream, thus improving treatment efficiency and reducing costs. Ion-exchange chromatography is used to remove the fluoride and fluorosilicate ions by passing the wastewater stream through one or more columns that contain a charge resin, which selectively binds cations/anions in the stream. The fluoride ions are washed from the column and then collected for removal or use in other processes.