Title of article :
2,3,7,8-TCDD equivalence and mutagenic activity associated with PM10 from three urban locations in New Zealand
Author/Authors :
Leslie E. BrownT، نويسنده , , Katherine R. Trought، نويسنده , , Christopher I. Bailey، نويسنده , , Janine H. Clemons، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2005
Pages :
14
From page :
161
To page :
174
Abstract :
Ambient particulate matter (PM10) in urban centres varies depending on emission sources, geography, demography, and meteorology. Hence physical (PM10, wind speed, rainfall, temperature), chemical (polycyclic aromatic hydrocarbons, PAH), and toxicological (Ames Test, H4IIE EROD Assay) analyses were done on daily PM10 (~1640 m3/day) collected from three New Zealand urban sites where winter emissions were predominantly due to domestic home heating. Daily PM10 levels ranged between 9.7 and 20.8 in summer and between 21.8 and 61.0 Ag/m3 in winter. Daily PAH concentrations were 0.5, 0.45, and 1.5 ng/m3 in summer and 52.1, 128.9, and 5.8 ng/m3 in winter at sites Christchurch, Alexandra and Dunedin, respectively. During winter, 74% of PM10 extracts from all three sites showed significant mutagenicity in the Ames Test (TA 98, S9), whereas approximately 25% of the daily PM10 was mutagenic in summer. Benzo[a]pyrene and BaP carcinogenic equivalence concentrations during winter were strongly correlated to both mutagenicity and TCDD-like activity at two sites. Daily levels of TCDD toxicity equivalence concentrations ranged from 0.5 to 3.6 pg TCDD/m3 air in summer and from 0.3 to 4009 pg TCDD/ m3 air in winter. Chemically and biologically derived TCDD toxicity equivalent concentrations were significantly correlated in all study locations indicating that PAH may represent most of the TCDD-like activity present in the PM10.
Keywords :
urban , mutagenic , Dioxin , PM10 , Wood smoke
Journal title :
Science of the Total Environment
Serial Year :
2005
Journal title :
Science of the Total Environment
Record number :
984372
Link To Document :
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