Bioaccessibility of Trace Metals in Household Dust

摘要: Household dust is a heterogeneous mixture of micrometer-sized particulates derived from an array internal and external sources. Many these sources, including road dust, soil, decorative materials, are enriched in trace metals, this reflected the composition indoor dust. The exposure risk posed by metal environment dependent on loading absolute concentration bioaccessibility interest. Bioaccessibility defined as fraction total that accessible (or soluble) gastrointestinal tract, generally determined vitro incubating samples solutions mimic, successively, chemical conditions encountered human stomach intestine. With regard to household average bioaccessibilities metals range less than 20% (e.g., Cr, Cu, Sn, U) greater 50% Cd, Mn, Zn). For most accessibility reduced However, for form oxyanionic aqueous species U), enhanced latter.