Spatial Variation of the 3.29 and 3.40 Micron Emission Bands within Reflection Nebulae and the Photochemical Evolution of Methylated Polycyclic Aromatic Hydrocarbons

1996 ◽  
Vol 458 ◽  
pp. 610 ◽  
Author(s):  
C. Joblin ◽  
A. G. G. M. Tielens ◽  
L. J. Allamandola ◽  
T. R. Geballe
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Spatial Variation ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic ◽  
Reflection Nebulae

ASSESSMENT OF LONG-TERM SPATIAL VARIATION OF HEAVY METALS AND POLYCYCLIC AROMATIC HYDROCARBONS IN URBAN AREAS OF BASEL

2013 ◽  
Vol 2013 (1) ◽  
pp. 5255
Author(s):  
Harish C. Phuleria ◽  
Siventher Jeyachchandren ◽  
Elisabetta Corradi ◽  
Harald Zechmeister ◽  
Nino Kuenzli
Keyword(s):  
Heavy Metals ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Spatial Variation ◽  
Aromatic Hydrocarbons ◽  
Urban Areas ◽  
Polycyclic Aromatic

Spatial variation of polycyclic aromatic hydrocarbons and equivalent toxicity in Sydney Harbour, Australia

2013 ◽  
Vol 4 (4) ◽  
pp. 364-372 ◽  
Author(s):  
Rupak Aryal ◽  
Simon Beecham ◽  
Sarvanamuthu Vigneswaran ◽  
Jaya Kandasamy ◽  
Ravi Naidu
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Spatial Variation ◽  
Aromatic Hydrocarbons ◽  
Sediment Toxicity ◽  
The United States ◽  
High Concentration ◽  
Total Pahs ◽  
Identification Evaluation ◽  
Sydney Harbour ◽  
Polycyclic Aromatic

Harbour sediments include wash-off from different nearby catchments that have various landuse activities. In this study the spatial variation of polycyclic aromatic hydrocarbons (PAHs) in Sydney Harbour was studied by analysing the sediment. The sediment was collected from 12 locations and 16 PAHs that are prioritized by the United States Environmental Protection Authority were analysed. The concentrations in the sediment were in the range of 54–23,440 ng/g of total PAHs and this varied from location to location. The result suggests that the harbour is contaminated with PAHs from low concentration to very high concentration. Among the total PAHs, approximately 75% were medium to higher molecular weight 4- and 5-ring member PAHs. A toxicity identification evaluation (TEQ) approach using a toxicity equivalency factor (TEF) was applied to assess the sediment toxicity. The TEF was found to be between 22 and 8,277 ng TEQ/g. The TEQ value indicated potential adverse ecological and human health effects in many locations.

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