Occurrence, behavior and human health risk assessment of dechlorane plus and related compounds in indoor dust of China.

Levels of dechlorane plus (DP) and "DP-like" compounds were measured in indoor dust samples collected across China. The concentrations of ΣDP and "DP-like" compounds ranged from 0.35 to 1,000 ng g(-1) and<0.21 to 2.4 ng g(-1), respectively. The total DP concentration in urban sites were significantly higher than those of rural sites, while no significant difference was found for "DP-like" compounds, suggesting different sources of these compounds. Significant positive correlations were found between fsyn and latitude, and between fsyn and longitude. The deleterious risk associated with DP exposure via indoor dust for the general population in China was low and safer than expectation. For estimating human exposure via indoor dust, sensitivity analysis showed that more attention should be given to the influential variables such as the level of pollutants, body weight, and the amount of ingestion and adsorption.