METHOD FOR TREATING FLUORINE ION-CONTAINING WASTEWATER BY FLUORINE ADSORBENT

摘要

PROBLEM TO BE SOLVED: To provide a fluorine adsorbing treating method which is a method for carrying out adsorption removal of fluoride ions in water by an adsorbent and which can treat fluorine ion-containing wastewater to or below a fluorine emission standard value over a long period of time.;SOLUTION: Fluorine-containing wastewater is made to pass through a fixed bed reaction tank where a zirconium-containing fluorine adsorbent is charged to carry out adsorption removal of fluorine ions in the wastewater in the reaction tank. In this method for treating fluorine ion-containing wastewater by the fluorine adsorbent, liquid is made to flow so that flowing liquid linear velocity LV to the reaction tank is 0.5 to 20 m/h, flowing liquid space velocity SV is 10 to 30 h^-1 and pH gradient value (ΔpH) between entrance pH (raw water pH) and exit pH (treated water pH) in the reaction tank is within the range of 1.0 to 3.0.;COPYRIGHT: (C)2012,JPO&INPIT