title: Polybrominated diphenyl ether exposure to electronics recycling workers--a follow up study.
abstract: Workers at an electronics recycling plant have previously been shown to have elevated serum levels of polybrominated diphenyl ethers (PBDEs) compared to referents without occupational PBDE exposure. Subsequent structural changes and industrial hygiene measures at the plant were applied to improve the work environment. The present study aims to assess the impact of these work environment changes on the occupational exposure to PBDEs. Blood were drawn from the workers and analyzed at two different laboratories, and serum concentrations of several PBDE congeners were determined by GC/MS or GC/HRMS. Cross-sectional studies were performed prior to (in 1997; N=19) and after (in 2000; N=27) workplace improvements. Longitudinal studies were performed on twelve of the workers that were sampled at both occasions. Even though the amount of processed goods had doubled in 2000 as compared to 1997, there was a significant decrease in the serum levels of BDE-183 and BDE-209. For BDE-209 the levels observed in year 2000 were even lower than in referents with no occupational exposure. In contrast to the decrease of higher brominated diphenyl ethers, the concentrations of BDE-47 did not significantly change. For BDE-153, the cross-sectional study indicated no change, whereas the longitudinal follow up indicated a significant increase. This study shows that the industrial hygiene improvements clearly reduced the occupational exposure to BDE-183 and BDE-209 at the plant. Still, the levels of hexa- to nonaBDEs but not BDE-209 were elevated, compared to referents with no occupational exposure.
authors.affiliation: Department of Environmental Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden.
authors.forename: Kaj
authors.initials: K
authors.lastname: Thuresson
authors.forename: Ke
authors.initials: K
authors.lastname: Bergman
authors.forename: Klaus
authors.initials: K
authors.lastname: Rothenbacher
authors.forename: Thomas
authors.initials: T
authors.lastname: Herrmann
authors.forename: Sverker
authors.initials: S
authors.lastname: Sjölin
authors.forename: Lars
authors.initials: L
authors.lastname: Hagmar
authors.forename: Olaf
authors.initials: O
authors.lastname: Päpke
authors.forename: Kristina
authors.initials: K
authors.lastname: Jakobsson
mesh_terms: D003247:Conservation of Natural Resources; D003430:Cross-Sectional Studies; D004581:Electronics; D004987:Ethers / Q000633:toxicity*; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D008137:Longitudinal Studies; D016273:Occupational Exposure; D011075:Polybrominated Biphenyls / Q000097:blood / Q000633:toxicity*
chemical_list: D004987:Ethers; D011075:Polybrominated Biphenyls