PM 10 and PM2.5 source apportionment in the Barcelona Metropolitan area, Catalonia, Spain

被引:556
作者
Querol, X
Alastuey, A
Rodriguez, S
Plana, F
Ruiz, CR
Cots, N
Massagué, G
Puig, O
机构
[1] CSIC, Inst Earth Sci Jaume Almera, Barcelona 08028, Spain
[2] Direccio Gen Qualitat Ambiental, Generalitat Catalunya, Barcelona 08029, Spain
关键词
PM10; PM2.5; source apportionment; receptor modelling; road traffics; Saharan dust; Spain;
D O I
10.1016/S1352-2310(01)00361-2
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Levels of total suspended particles, PM10, PM2.5 and PM I were continuously monitored at an urban kerbside in the Metropolitan area of Barcelona from June 1999 to June 2000. The results show that hourly levels of PM2.5 and PM I are consistent with the daily cycle of gaseous pollutants emitted by traffic, whereas TSP and PM 10 do not follow the same trend, at least in the diurnal period. The PM2.5/PM10 ratio is dependent on the traffic emissions, whereas additional contribution sources for the > 10 mum fraction must be taken into account in the diurnal period. Different PM10 and PM2.5 source apportionment techniques were compared. A methodology based on the chemical determination of 83% of both PM10 and PM2.5 masses allowed us to quantify the marine (4% in PM 10 and < 1% in PM2.5), crustal (26% in PM 10 and 8% in PM2.5) and anthropogenic (54% in PM 10 and 73% in PM2.5) loads. Peaks of crustal contribution to PM10 (up to 44% of the PM10 mass) were recorded under Saharan air mass intrusions. A different seasonal trend was observed for levels of sulphate and nitrate, probably as a consequence of the different thermodynamic behaviour of these PM species and the higher summer oxidation rate of SO2. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:6407 / 6419
页数:13
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