| A total of 73 household dust and 6 office dust were collected and the concentrations of Ca, Fe, Cd, Cr, Cu, Ni, Pb and Zn were measured by ICP-OES, in order to study the levels of heavy metals in city indoor dust and assessits risk from indoor and outdoor dust to children. The result showed that: 1 The concentrations of Ca, Fe were 107, 31.9 g·kg-1 and those of Cd, Cr, Cu, Ni, Pb and Zn were 1.77, 107, 231, 81.9, 199, 721 mg·kg-1, respectively. 2The levels of Cu and Zn in office dust were significantly higher than those in household dust, and the levels of other elements had no obvious difference from those in household dust. 3The levels of Ca and Fe in household dust with different floor numbers were not significantly different, but the levels of Cd, Cu and Pb in household dust with different floor numbers had obvious difference. The levels of elements in household dust from 1th floor were relatively higher, and the level of Pb in household dust from higher floors was higher than that on lower floors. 4Outdoor environment, indoor decoration and life styles may cause the difference of elements level in different household dust. 5There was no obvious risk from heavy metals in dust to children. |
