Fluoride free new nano-particles-mn-biotite synthesis for removal some of toxic heavy metals,Th(IV) and U(VI) from aqueous solutions

The present paper aims to synthesize new family of fluoride free mn- biotite type having the optimized formula namn2.5(al,si) 4o10(oh)2. the free fluoride mn- biotite was prepared carefully by using solid- state reaction technique using nominal compositions of individual oxides in the main formula for the potential removal of some heavy metals and some radioactive elements from aqueous solution. the crystal structure of mn-biotite was well characterized via powder x-ray diffraction (xrd). the particle size was estimated and found to be 54 nm. analysis of xrd profile indicated that mn- biotite is belonging mainly to the monoclinic crystal structure. infrared spectroscopy (ir) showed the most intensive absorption peaks for monoclinic phase observed at 3420,2360,1620,1440cm-1. furthermore the morphological microstructure was investigated by semicroscopy (sem),the estimated grain size was found to be in between (0.8-7.7) μm. electron spin resonance (esr) proved that mn-biotite has paramagnetic behavior. also dc- electrical conductivity and tga were investigated. in conclusion results suggest that the synthesized mnbiotite can be used as good ion exchanger with high performance to remove heavy metals and some radioactive species from wastewater.