PBDE وPCB در محيط داخل و فاكتورهاي تاثير گذار بر غلظت آنها

عنوان انگليسی

PBDEs AND PCBs IN INDOOR AIR: LEVELS AND FACTORS INFLUENCING THEIR CONCENTRATIONS

خلاصه انگلیسی

Polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) are two classes of persistent organic compounds widely detected in all environmental compartments as a result of their intensive use in industrial and commercial applications. PCBs were applied in public building constructions for various purposes, mainly as an additive to concrete, caulking, grout, paints, permanent elastics, Thikol rubber sealants, and flame retardant coatings of acoustic ceiling tiles.Relatively little is known about PCB and PBDE concentrations in indoor environments and the factors influencing their levels. In this paper we report the PCB and PBDE concentrations in a wide range of indoor microenvironments Material and methods Fully sheltered polyurethane foam disks (140 mm diameter, 12 mm thickness, 360.6 cm2 surface area, and 0.01685 g cm-3 density) were deployed in a number of indoor microenvironments including 29 homes, 29 offices, 3 public indoor environments, and 25 cars for a period of approximately one month in the West Midlands of the UK.To estimate concentrations of PCBs and PBDEs in indoor air previously reported passive sampling rates were applied Results and discussion PCB in this study constitutes the sum of the 57 quantified PCB chromatographic peaks in most of the samples, while PBDE refers to the sum of 10 BDE congeners including BDEs 17, 28, 47, 49, 66, 85, 99, 100, 153, and 154.Average concentrations of PCB and PBDE for all indoor microenvironments studied were 8.8 and 0.269 ng m-3, respectively. Excluding cars, average indoor air concentrations of PCB and PBDE for all other indoor microenvironments are 11.6 ng m-3 (SD=22; median = 3.55; from 0.49 to 101.8 ng m-3) and 0.109 ng m-3 (SD=0.2; median = 0.047; from 0.004 to 1.4 ng m-3), respectively.

Document Downloads