主催: Japan Association of Mineralogical Sciences
There are various reactions between nanoparticles and biological tissues, which strongly depend on the speciation and form of constituent elements. We have focused on the speciation of metals particularly on fine fraction of PM to elucidate the toxicity of those particles. Research targets were urban PM from Detroit, Fukuoka, Hefei, and a NIST standard (SRM1649a). Advanced electron microscopy and synchrotron-based X-ray absorption fine structure have been utilized. The results obtained from these samples reveal the complex mixing state of toxic metals and the size-dependent phase heterogeneity bearing the elements of interest. This presentation summarizes the results obtained from our recent projects focusing on the speciation of metals: Fe, Pb, Cr, and Mn.
