Causes of variability in concentrations of polychlorinated biphenyls and polybrominated diphenyl ethers in indoor air
Causes of variability in concentrations of polychlorinated biphenyls and polybrominated diphenyl ethers in indoor air
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DOI：
10.1021/es0617082
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发表时间：
2006-12-15
影响因子：
11.4
通讯作者：
Harrad, Stuart
中科院分区：
文献类型：
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作者：
Hazrati, Sadegh;Harrad, Stuart
在办公室、家庭、公共环境和汽车中测量了多氯联苯和多溴二苯醚的空气浓度。同一住宅和办公楼不同房间之间的浓度变化表明，两个化合物组存在一定的建筑物内变异性。逐步多元线性回归分析显示，家庭和办公室中多氯联苯和多溴二苯醚的对数标准化浓度与个人电脑数量等因素之间没有明确和一致的关系。这被认为反映了室内空气污染与微环境特征之间关系的复杂性。一间办公室将一台1998年制造的电脑更换为一台2003年制造的电脑后，办公室内的多溴二苯醚浓度明显下降，这表明了个人电脑的影响。1950年至1979年间建造的建筑物中多氯联苯的浓度明显高于此后建造的建筑物（p < 0.001）。当两辆污染最严重的汽车作为离群值被忽略时，多溴二苯醚浓度与车辆年龄之间存在显著（p < 0.01）的正线性关系。在一个日历年中，对四个家庭和四个办公室的多氯联苯和多溴二苯醚浓度进行了监测。虽然温暖月份的浓度通常超过寒冷月份的浓度，但室内污染的季节性变化似乎没有以前观察到的室外空气那么显著。
Airborne concentrations of PCBs and PBDEs were measured in offices, homes, public environments, and cars. Variations in concentrations between different rooms in the same domestic and office buildings, showed some intra-building variability for both compound groups. Stepwise multiple linear regression analysis revealed no clear and consistent relationships between log-normalized concentrations of PCBs and PBDEs in homes and offices and factors such as the number of personal computers. This is considered to reflect the complexity of relationships between indoor air contamination and microenvironment characteristics. The influence of personal computers was demonstrated when PBDE concentrations in one office fell appreciably following the exchange of a computer constructed in 1998 for one dating from 2003. Concentrations of PCBs in buildings constructed between 1950 and 1979 were significantly higher (p < 0.001) than in those constructed since. When two of the most contaminated cars were omitted as outliers, a significant (p < 0.01) positive linear relationship was detected between PBDE concentrations and vehicle age. Concentrations of PCBs and PBDEs were monitored throughout a calendar year in four homes and four offices. Although concentrations in warmer months usually exceeded those in colder months, seasonal variability in indoor contamination appears less significant than observed previously for outdoor air.