Electrodialytic utilization of boron IE column post-regeneration lyes Original Research Article

Presently boron-rich chemical landfill leachate originating from Tarnowskie Góry is being treated by boron-selective ion-exchange resin. Since the boron concentration in this feed water type is relatively high (approx. 70 mg of B/L), the IE column post-regeneration lyes, that are strongly acidic and contain up to 2.5 g of B/L, utilization cost increases the boron removal cost to a large extent. Thus, based on the authors’ previous research, an attempt was made to propose a low-cost method for utilization of the lye of this type. Primarily, by observing the species, namely HCl and boron, distribution into the post-regeneration lye (eluate) it was concluded that three distinct fractions may be identified. The first, approx. 25% of the total eluate volume, is rich in both acid and boron (approx. 2.33 g B/L and 17.57 g HCl/L), the second is rich in acid and contained some boron (approx. 1.8 g B/L and 30 g HCl/L) and the third that contained both acid and boron at low level (0.163 g B/L and 1.05 g HCl/L).