PBDEs and Dechlorane Plus in the environment of Guiyu, Southeast China: A historical location for E-waste recycling (2004,2014)

Polybrominated diphenyl ethers (PBDEs, tri-to hepta-BDEs) and Dechlorane Plus (DP) in multiple samples (soil, sediment, road dust, and PM2.5 particles) in historical locations of our previous work in Guiyu (electronic-waste recycling town) in southeastern China were investigated in 2014. Ten years later, PBDEs and DP were detected in 100% of the samples. Sigma 3-7PBDEs were still relatively great, ranging from 1.2 x 10(1) to 2.1 x 10(3) ng/g dry weight (dw) in soil, 2.1 to 3.2 x 10(3) ng/g dw in sediment, 1.0 x 10(1) to 1.1 x 10(4) ng/g dw in road dust, which were a little less than or close to those measured in 2004. However, Sigma 3-7PBDEs in PM2.5 (5.0 x 10(2) to 8.4 x 10(2) pg/m(3)) were significantly lower in 2014. BDE-47, -99, 153, and 183 were predominant congeners, which were also predominant PBDEs reported in Guiyu (2006-2008). Greater proportions of lesser-brominated BDEs were predominant in PM2.5 than other samples. DP was detected in 100% of the samples collected with high levels. Total syn-DP and anti-DP concentrations were 3.8 to 2.1 x 10(3) ng/g dw in soil, 1.1 x 10(3) to 7.2 x 10(3) ng/g dw in sediment, 1.4 x 10(1) to 1.1 x 10(3) ng/g dw in road dust, and 1.8 x 10(2) and 1.7 x 10(2) pg/m(3) in PM2.5. Most of the fractions of anti-DP (f(anti)) (70%-80%) were consistent among samples. The health risk assessment showed that hazard indexes (His) of PBDEs or DPs for child or adult were all lower than 0.16. (c) 2018 Elsevier Ltd. All rights reserved.