天津地区一些降尘中多环芳烃的含量与分布  

PAHs in the dust fallfrom tianjin area collected during winter and summer seasons

作　　者：吴水平[1] 兰天[1] 左谦[1] 刘文新[1] 曹军[1] 李本纲[1] 徐福留[1] 沈伟然[2] 秦保平[2] 孙韧[2] 张文具 陶澍[1] 

机构地区：[1]北京大学环境学院地表过程分析与模拟教育部重点实验室,北京100871 [2]天津市环境保护局,天津300191

出　　处：《环境科学学报》2004年第6期1066-1073,共8页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金项目(400332015;40024101)资助

摘　　要：采集并分析了天津地区2002～2003年16区县23个样点采暖与非采暖期降尘样品中16种优控多环芳烃(PAHs)含量.非采暖期样品16种PAHs含量总和(ΣPAH16)在1 00～48 18μg·g-1间,采暖期样品ΣPAH16在2 54～85 47μg·g-1间.采暖期降尘高含量PAHs主要为萘、菲、荧蒽、和芘,非采暖期降尘PAHs的优势成份包括萘、芴、菲、荧蒽和.除东部工业区外,同一样点采暖期降尘中高环PAHs含量普遍高于非采暖期.采暖期样品各PAHs彼此之间相关性较非采暖期显著.无论是采暖期还是非采暖期,降尘中PAHs主要都是来源于燃煤,交通污染源也占一定比例.Atmospheric dustfall collected from 23 locations in Tianjin, China during non-heating and heating seasons from Match 2002 to Match 2003 was analyzed for 16 polycyclic aromatic hydrocarbons (PAHs). The sums of 16 PAH compounds (ΣPAH_(16)) in the dustfall were in the ranges from 1.00 to 48.2?μg·g^(-1) and from 2.54 to 85.5?μg·g^(-1) for non-heating and heating seasons, respectively. Five compounds were predominant: naphthalene, phenathrene, fluoranthen, chrysene and pyrene, which represented 71%～87% of the total PAH concentration in the dustfall samples collected from heating season. The six potential carcinogenic PAHs as described by the International Agency for Research on Cancer (IARC) (i.e. BaA, BbF, BkF, DBA, and IncdP) represented on average 27.3% of the total PAHs, of which 3.6% was BaP. Five compounds (naphthalene, fluorine, phenathrene, fluoranthene and chrysene) dominated the non-heating samples, and the sum of these compounds represented 31%～88% of ΣPAH_(16). The sum of six potential carcinogenic PAHs also represented on average 27.3% of ΣPAH_(16), and BaP was 3.5%. The concentrations of most individual PAH compounds in heating samples were higher than those of non-heating samples at the same sites except those samples collected from east industrial area of Tianjin. The same phenomena were observed for high molecular weight PAHs with 4 to 6 rings and the six compounds described by IARC. The concentration levels of PAHs in Tianjin dustfall were controlled mainly by the different locations, although the exposed time may have some influences on the concentrations and profiles of 16 PAHs. The correlations among individual PAH compounds in the heating season dustfall were more significant than those of the non-heating season samples. Trilinear comparison of 3-, 4- and 5&6- ring PAHs in the non-heating dustfall was more discrete than that of heating dustfall. The ratios of Pyr/BaP and Flua/Pyr in the dustfall samples indicated that the contribution of coal combustion was the main source of PAHs in b

关 键 词：采暖期 降尘 多环芳烃(PAHs) 荧蒽 交通污染 燃煤 样品 含量 相关性 天津地区 

分 类 号：X831[环境科学与工程—环境工程] R586[医药卫生—内分泌]