Abstract
Stabilized FeSm (Mackinawite) nanocrystals have been synthesized by hydrothermal treatment of single precursor polymer metal complex. The polymer metal complex was prepared by the reaction of thiourea-formaldehyde resin with metal Fe(II) ion. The synthesized FeSm nanocrystals were characterized by X-ray spectrometry and electronic microscopy. The transmission electron microscopy micrographs showed needle shaped nanocrystals and the thickness and length of these nanocrystals were found to be 12 ± 3 and 120 ± 5 nm, respectively. The lattice fringes in the HRTEM images, with d-spacing 0.521 ± 0.005nm very close to (0 0 1) plane of mackinawite nature. The interaction between aqueous Hg(II) and synthetic FeSm was studied via batch sorption experiments. The maximum absorption capacity of FeSm has been found with 0.001:0.08M ratio of Hg(II) and FeSm, while the minimum absorption capacity was found with 0.001:0.005M ratio of Hg(II) and FeSm and removed only 60% of Hg(II) from aqueous solution. Batch studies revealed that FeSm nanocrystals were effectively remove Hg(II) from aqueous solution along a broad pH range.
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