The Influences of the Presence of Ions Counter on the Removal Capacity Fluorides Ions by Chitosane

Abstract

To approximate conditions defluoridation groundwater, during this work, we are interested in the study of the influence of the presence of ions -counter on the ability of removing fluoride ions by chitosan. Also we searched the optimal conditions for the desorption using a basic solution. In light of this study, we observed that a NO 3 -and HCO 3 -share are the real competitors to the removal of fluoride on chitosan. And secondly, Desorption of fluoride from saturated support is possible and efficient with the addition of NaOH in our optimal desorption conditions.

Comparative study of adsorption of fluoride ions on chitosan gel beads and cross-linked chitosan gel beads

“…Several processes are used to remove excess fluorine in water such as nanofiltration [1,2], electrodialysis [3], ion exchange resins [4,5], precipitation [6] and adsorption [7,8] which is the most studied technique with the exploration of new adsorbents and in particular those resulting from abundant natural resources [9][10][11]. Thus, in our laboratory, we investigated the properties of chitin and chitosan as adsorbents for defluoridation [12][13][14] and denitrification [15] of contaminated water.…”