[Vertical profile of polybrominated diphenyl ethers (PBDEs) in sediment from an E-waste area in South China].
ABSTRACT Polybrominated diphenyl ethers (PBDEs) were determined in a sediment core collected from a reservoir in an electronic waste (e-waste) area of South China. PBDEs were detected throughout the core,with a mean value of 9.26 ng/g dry weight. 0.43 to 141 ng/g PBDEs concentrations were low (0.43-2.30 ng/g) and varied less in the lower layers (below 16 cm) of the core,whereas their concentrations increased remarkably in the upper layers (2.90-141 ng/g). The vertical distribution of PBDEs indicated the influence of local e-waste recycling activities. PBDEs originated from commercial deca-BDE mixture were the dominant congeners, accounting for 79.6% of the total PBDEs, followed by PBDEs from penta-BDEs (14.7%). PBDEs from octa-BDEs contributed only 5.69%. The difference between PBDE congener profiles in the sediment and those in the commercial penta-, octa-, and deca-BDEs suggests the possible degradation of highly brominated PBDEs in the sediment, which was further supported by the occurrence of BDE202 and the vertical variation of the fractions of nona-BDE congeners and ratios of BDE197/BDE201. However, more work is needed regarding PBDE degradation in the environment.
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ABSTRACT: The release of pollutants during the recycling of contaminated plastics is a problem which has drawn worldwide attention, however, little information on the transfer of polybrominated diphenyl ethers (PBDEs) in these processes is available. We conducted a survey of PBDEs in soils, sediments, and human hair in a typical plastic waste recycling area in northern China. The total concentrations (ng/g) of 21 PBDEs were 1.25-5504 (average 600), 18.2-9889 (average 1619), and 1.50-861 (average 112) in soils, sediments, and hair, respectively. The PBDE concentrations were comparable to concentrations observed in e-waste recycling areas, however, the concentrations in soils and sediments were one to three orders of magnitude higher than in other areas and the concentrations in hair were much higher than in other areas. This indicates that this area is highly polluted with PBDEs. BDE-209 was the dominant congener (representing 91.23%, 92.3% and 91.5% of the total PBDEs observed in soils, sediments and hair, respectively), indicating that the commercial deca-BDE product was dominant. The commercial penta- and octa-BDE products made small contributions to the total PBDE concentrations, unlike what has been found in some e-waste recycling areas. Our results show that crude plastic waste processing is a major contributor of PBDEs to the environment and humans, which should be of great concern.Environmental Science & Technology 01/2014; · 5.26 Impact Factor