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- Rydén, Andreas, 1981-, et al.
(författare)
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Occurrence and potential human exposure to brominated flame retardants at a Swedish smelter handling electronic scrap
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- Some well-known brominated flame retardants are common in electronic and electric devices, i.e. polybrominated diphenyl ethers (PBDEs), nowadays particularly the commercial DecaBDE, and tetrabromobisphenol A (TBBPA), but others are used as well. The PBDEs are ubiquitous environmental contaminants while the TBBPA is primarily reported as a contaminant of the abiotic compartments. In this study, personnel at a smelter handling large quantities of shredded printed circuit boards were assessed for potential elevated concentrations of PBDEs, TBBPA and other BFRs. Also dust, sampled at a few sites around the plant, was analysed for BFRs. The dominating BFRs in the dust were decabromodiphenyl ether (BDE-209) and TBBPA, while intermediate levels were indicated for bis(2,4,6-tribromophenoxy)ethane (BTBPE), decabromodiphenyl ethane (DBDPE) and hexabromobenzene (HBB) and only low concentrations of decabromobiphenyl (BB-209) and 2,4,6-tribromophenol (2,4,6-TBP). The workers all showed similar concentrations of the PBDE congeners in serum as recently determined for a Swedish control group. TBBPA was below limit of detection while 2,3,4,6-tetrabromophenol was present in all workers at rather high concentrations. It is yet not known from where this exposure originate, since the compound is not related to BFRs in the dust from the electronic scrap. It is clear that the workers are well protected from the emissions from the printed circuit boards, even though the volumes of electronic scrap handled at the smelter has increased significantly.
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- Norrgran, Jessica, 1979-, et al.
(författare)
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Higher PBDE Serum Concentrations May Be Associated with Feline Hyperthyroidism in Swedish Cats
- 2015
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Ingår i: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 49:8, s. 5107-5114
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Tidskriftsartikel (refereegranskat)abstract
- Serum from 82 individual cats was analyzed for decabromobiphenyl (BB-209), polybrominated diphenyl ethers (PBDEs), hydroxylated PBDEs (OH-PBDEs), and 2,4,6-TBP in order to study differences in body burden between healthy and sick cats diagnosed with Feline Hyperthyroidism (FH). Within the study group, 60 of these cats had a euthyroid (n = 23) or hyperthyroid (n = 37) status, all of which were used in the comparison. This study shows that hyperthyroid compared to euthyroid cats have higher serum concentrations for some of the investigated PBDEs (BDE-99, BDE-153, and BDE-183) and CB-153 on a fat weight basis. Further, it is intriguing, and beyond explanation, why the flame retardant BB-209 (discontinued in 2000) is present in all of the cat serum samples in concentrations similar to BDE-209. Median BDE-47/-99 ratios are 0.47 and 0.32 for healthy and euthyroid cats, respectively, which differs significantly from Swedes, where the ratio is 3.5. Another important finding is the occurrence of very low levels or the absence of hydroxylated PBDE metabolites in the cats. In addition, the major OH-PBDE, 6-OH-BDE47, is likely of natural origin, probably ingested via cat food. The statistics indicate an association between elevated PBDE concentrations in the cats and FH.
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- Zhou, Yihui, et al.
(författare)
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Extensive organohalogen contamination in wildlife from a site in the Yangtze River Delta
- 2016
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Ingår i: Science of the Total Environment. - : Elsevier BV. - 0048-9697 .- 1879-1026. ; 554, s. 320-328
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Tidskriftsartikel (refereegranskat)abstract
- The environmental and human health concerns for organohalogen contaminants (OHCs) extend beyond the 23 persistent organic pollutants (POPs) regulated by the Stockholm Convention. The current, intense industrial production and use of chemicals in China and their bioaccumulation makes Chinese wildlife highly suitable for the assessment of legacy, novel and emerging environmental pollutants. In the present study, six species of amphibians, fish and birds were sampled from paddy fields in the Yangtze River Delta (YRD) were screened for OHCs. Some extensive contamination was found, both regarding number and concentrations of the analytes, among the species assessed. High concentrations of chlorinated paraffins were found in the snake, Short-tailed mamushi (range of 200-340 mu g g(-1) lw), Peregrine falcon (8-59 mu g g(-1) lw) and Asiatic toad (97 mu g g(-1) lw). Novel contaminants and patterns were observed; octaCBs to decaCB made up 20% of the total polychlorinated biphenyls (PCBs) content in the samples and new OHCs, substituted with 5-8 chlorines, were found but are not yet structurally confirmed. In addition, Dechlorane 602 (DDC-DBF) and numerous other OHCs (DDTs, hexachlorocyclohexanes (HCHs), polybrominated diphenyl ethers (PBDEs), hexbromocyclododecane (HBCDD), chlordane, heptachlor, endosulfan and Mirex) were found in all species analyzed. These data show extensive chemical contamination of wildlife in the YRD with a suite of OHCs with both known and unknown toxicities, calling for further indepth studies.
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