Levels,sources and health risks of carbonyls and BTEX in the ambient air of Beijing,China  

作　　者：Yujie Zhang Yujing Mu Junfeng Liu Abdelwahid Mellouki 

机构地区：[1]Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [2]Centre National de Recherche Scientifique-Institut de Combustion,Aerothermique,Reactivite et Environnement(CNRS-ICARE),45071 Orleans cedex 02,France

出　　处：《Journal of Environmental Sciences》2012年第1期124-130,共7页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 41075094,40830101, 21177140,20977097);the National Basic Research and the Development Program (973) of China (No. 2010CB732304);the Special Fund for Environmental Research in the Public Interest (No. 201009001);the National Water Special Project (No. 2009ZX07210-009)

摘　　要：The atmospheric concentrations of carbonyls and BTEX （benzene,toluene,ethylbenzene,m,p-xylene and o-xylene） were measured simultaneously at a same sampling site in Beijing from September 2008 to August 2010.The average concentrations of the total measured carbonyls during autumn,winter,spring,and summer were 37.7,31.3,39.7,50.5 μg/m 3,respectively,and maximal values for their diurnal variations usually happened at noontime.In contrast to carbonyls,the average concentrations of the total measured BTEX during the four seasons were 27.2,31.9,23.2,19.1 μg/m 3,respectively,andminimal values for their diurnal variations always occurred in the early afternoon.The average concentration for carbonyls increased about 24% from September 2008–August 2009 to September 2009–August 2010,for BTEX,increased about 15%.Integrated life time cancer risks for three carcinogens （benzene,formaldehyde and acetaldehyde） in Beijing exceeded the value of 1E-06,and the hazard quotient （HQ） of non-cancer risk of exposure to formaldehyde exceeded unity.The atmospheric concentrations of carbonyls and BTEX （benzene,toluene,ethylbenzene,m,p-xylene and o-xylene） were measured simultaneously at a same sampling site in Beijing from September 2008 to August 2010.The average concentrations of the total measured carbonyls during autumn,winter,spring,and summer were 37.7,31.3,39.7,50.5 μg/m 3,respectively,and maximal values for their diurnal variations usually happened at noontime.In contrast to carbonyls,the average concentrations of the total measured BTEX during the four seasons were 27.2,31.9,23.2,19.1 μg/m 3,respectively,andminimal values for their diurnal variations always occurred in the early afternoon.The average concentration for carbonyls increased about 24% from September 2008–August 2009 to September 2009–August 2010,for BTEX,increased about 15%.Integrated life time cancer risks for three carcinogens （benzene,formaldehyde and acetaldehyde） in Beijing exceeded the value of 1E-06,and the hazard quotient （HQ） of non-cancer risk of exposure to formaldehyde exceeded unity.

关 键 词：CARBONYLS BTEX SOURCES exposure and risk assessment Beijing 

分 类 号：X820.4[环境科学与工程—环境工程] O623.5[理学—有机化学]