Skip Navigation LinksHome > March 1988 - Volume 145 - Issue 3 > FLUORIDE SORPTION BY MONTMORILLONITE AND KAOLINITE1.
Soil Science:
Original Articles: PDF Only

FLUORIDE SORPTION BY MONTMORILLONITE AND KAOLINITE1.

BAR-YOSEF, B.; AFIK, ISABEL; ROSENBERG, RIVKA

Collapse Box

Abstract

We studied fluoride sorption by montmorillonite and kaolinite dominated by either Ca2+ or K+ as a function of F solution concentration, pH, and solution-to-clay ratio. Within an F concentration rate of 0 to 180 [mu]M and at pHs between 4 and 9, F concentration in the solution of the studied suspensions was governed by adsorption. Adsorption decreased with increasing pH values and was negligible at pH > 8.5. A competitive Langmuir model simulated satisfactorily F retention by the adsorbents under the studied experimental conditions. The maximum adsorption capacity parameter was greater for kaolinite than for montmorillonite and greater for Ca-dominated clays than for K-clays. The affinity of the F species to the surface was maximum in K-kaolinite and minimal in Camontmorillonite.

(C) Williams & Wilkins 1988. All Rights Reserved.

Login

Article Tools

Share