Dechlorane Plus in Human Hair from an E-Waste Recycling Area in South China: Comparison with Dust

摘要

Dechlorane Plus (DP) and a dechlorination product 1,6,7,8,9, 14,15,16,17,17,18-octadeca-7,15-diene (anti-Cl_(11)-DP), were measured in human hair and indoor dust collected from an e-waste recycling area and two control areas (rural and urban) in South China. DP was detected in hair and dust samples at concentrations ranging from 0.02-58.32 ng/g and 2.78-4197 ng/ g, respectively. anff-CI,,-DP, mainly detected in human hair and dust samples from the e-waste recycling area, ranged from nd (nondetected) to 0.23 ng/g in hair and from nd to 20.22 ng/g in dust Average values of anti-DP fractional abundance (f_(anti) ratio) in hair of e-waste dismantling workers (0.55 ± 0.11) and dust from e-waste recycling workshops {0.54 ± 0.15) were significantly lower than those in other groups (0.62-0.76 means for hair and 0.66-0.76 means for dust). Significantly positive correlation between DP concentrations in dust and hair and similarity in f_(anti) ratios between hair and dust suggest that ingeston of dust comprise one of the major routes for DP exposure. Significantly positive relationships were also observed between anti-C_(11)-DP and anti-DP for both hair and dust samples with similar regression line slopes. The ratios of anfr-C_(11)-DP to anti-DP between hair and dust show no significant difference. These results suggest that anti-C_(11)-DP in the human body is likely accumulated from the environmental matrix and not formed from biotransformatron of the parent DP.