Seasonal and long-term trends in atmospheric PAH concentrations:: Evidence and implications

被引:105
作者
Prevedouros, K
Brorström-Lundén, E
Halsall, CJ
Jones, KC
Lee, RGM
Sweetman, AJ [1 ]
机构
[1] Univ Lancaster, Inst Environm & Nat Sci, Dept Environm Sci, Lancaster LA1 4YQ, England
[2] Swedish Environm Res Inst, IVL, SE-40258 Gothenburg, Sweden
关键词
PAHs; air concentrations; seasonality; temporal trends; emission sources;
D O I
10.1016/j.envpol.2003.08.032
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Atmospheric monitoring data for selected polynuclear aromatic hydrocarbons (PAHs) were compiled from remote, rural and urban locations in the UK, Sweden, Finland and Arctic Canada. The objective was to examine the seasonal and temporal trends, to shed light on the factors which exert a dominant influence over ambient PAH levels. Urban centres in the UK have concentrations 1-2 orders of magnitude higher than in rural Europe and up to 3 orders of magnitude higher than Arctic Canada. Interpretation of the data suggests that proximity to primary sources 'drives' PAH air concentrations. Seasonality, with winter (W) > summer (S), was apparent for most compounds at most sites; high molecular weight compounds (e.g. benzo[a]pyrene) showed this most clearly and consistently. Some low molecular weight compounds (e.g. phenanthrene) sometimes displayed S > W seasonality at some rural locations. Strong W > S seasonality is linked to seasonally-dependent sources which are greater in winter. This implicates inefficient combustion processes, notably the diffusive domestic burning of wood and coal. However, sometimes seasonality can also be strongly influenced by broad changes in meteorology and air mass origin (e.g. in the Canadian Arctic). The datasets examined here suggest a downward trend for many PAHs at some sites, but this is not apparent for all sites and compounds. The inherent noise in ambient air monitoring data makes it difficult to derive unambiguous evidence of underlying declines, to confirm the effectiveness of international source reduction measures. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码:17 / 27
页数:11
相关论文
共 32 条
[1]   ARCTIC AIR-POLLUTION - AN OVERVIEW OF CURRENT KNOWLEDGE [J].
BARRIE, LA .
ATMOSPHERIC ENVIRONMENT, 1986, 20 (04) :643-663
[2]   Temporal trends of organochlorines in Northern Europe, 1967-1995. Relation to global fractionation, leakage from sediments and international measures [J].
Bignert, A ;
Olsson, M ;
Persson, W ;
Jensen, S ;
Zakrisson, S ;
Litzen, K ;
Eriksson, U ;
Haggberg, L ;
Alsberg, T .
ENVIRONMENTAL POLLUTION, 1998, 99 (02) :177-198
[3]   CONCENTRATIONS AND FLUXES OF ORGANIC-COMPOUNDS IN THE ATMOSPHERE OF THE SWEDISH WEST-COAST [J].
BRORSTROMLUNDEN, E ;
LINDSKOG, A ;
MOWRER, J .
ATMOSPHERIC ENVIRONMENT, 1994, 28 (22) :3605-3615
[4]   A comparison of PAH, PCB, and pesticide concentrations in air at two rural sites on Lake Superior [J].
Buehler, SS ;
Basu, I ;
Hites, RA .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2001, 35 (12) :2417-2422
[5]   Observations on PAH, PCB, and PCDD/F trends in UK urban air, 1991-1995 [J].
Coleman, PJ ;
Lee, RGM ;
Alcock, RE ;
Jones, KC .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1997, 31 (07) :2120-2124
[6]   Temporal trends, temperature dependence, and relative reactivity of atmospheric polycyclic aromatic hydrocarbons [J].
Dimashki, M ;
Lim, LH ;
Harrison, RM ;
Harrad, S .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2001, 35 (11) :2264-2267
[7]  
*EUR COMM DG ENV, 2001, EC EV AIR QUAL TARG
[8]  
*EUR UN, 2001, AMB POLL POLYC AROM
[9]  
FARRAR N, UNPUB
[10]  
Fellin P, 1996, ENVIRON TOXICOL CHEM, V15, P253, DOI [10.1897/1551-5028(1996)015&lt