Defluoridation Of Ground Waters Using Indigenous Clays

The properties of fluorine, its occurrence in nature and its source of incidence in variousrnmedia were presented. The fluoride metabolism, absorption, distribution, excretion and its effectrnon living organisms were briefly reviewed. Several methods suggested from time to time for arndefluoridation purpose were clearly stated. The fluoride content of natural waters collected fromrndifferent parts of Ethiopia were reported . A study on the defluoridation of water (artificial andrnnatural) by adsorption/ion-exchange with clays, collected from different parts of the country wasrnexamined . The effects of several parameters such as mass of adsorbent, contact time, volume ofrnwater, and pH of the solution on the fluoride removal efficiency of clays were studied . Amongrnthe adopted clays for defluoridation study, fired clay was found to be the least defluoridatingrnagent. The other raw clays manifested the promising results to use at community and householdrnlevels with black and red clays being the best defluoridating agent. A mechanism ofrndefluoridation by clays was verified experimentally . The regeneration capacity of the clays wasrntested using a regenerant 1 % (w/v) NaOH.

Get Full Work

Report copyright infringement or plagiarism