Mixed solid state / solution routes were applied to synthesize new family of free-fluoride
synthetic clay for water remediation applications. To facilitate the incorporation of the cations
the solution route was applied with some hydrothermal conditions and complexing with organic
moiety ( Ethylene glycol ). The sample of synthetic free fluoride –Na-4-mica was having the
general formula ( Na4Mg6M4Si4O22.nH2O) where M = Cr3+. Structural and micro-structural
properties were monitoring by using both of XRD and SEM evaluating , grain size of the mica
bulk was found to be in between 2.27- 3.33 μm which are lower than those reported in
literatures. Synthetic clay was tested and applied three time (stepwise) as a cations selective
remediator. Analytical investigations were made by using ICP-Ms spectroscopy .Investigations
proved that synthetic Cr(III)-type clay has medium-to-strong efficiency as cation selective clay
towards heavy metals tested . To confirm the synthesized 4Na-mica with general formula
Na4Mg6M4Si3AlO22.nH2O that prepared via solution route where M = Cr+++ theoretical
treatment was made by visualizing of tetrahedrally NaMg –silicates unit cell that considered the
main constituent of molecular sieving layers that responsible together with cation exchanging
strength (4Na-mica) for removal of investigated heavy metals cations namely( 201Hg++ ,207Pb++ ,
112Cd++ and 139La+++ ) .
