Document Detail


Polycyclic aromatic hydrocarbons in the atmosphere of Shanghai, China.
MedLine Citation:
PMID:  20145995     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Shanghai is the largest industrial and commercial city in China, and its air quality has been concerned for several years. However, scarce study had been made on the seasonal levels of atmospheric polycyclic aromatic hydrocarbons (PAHs), together with their gas-particle partitioning and potential emission sources. Based on an intensive sampling campaign at urban and suburban areas in Shanghai during four seasons of 2005-2006, this study presented the measurement of PAH concentrations in both particulate and gaseous phases, as well as seasonal and spatial variability. The results showed that the annual PAH levels (gas + particle) were 167 ± 109 ng m⁻³ at the urban site and 216 ± 86.5 ng m⁻³ at the suburban site. Gaseous PAHs (>70%) dominated the total PAH mass at both sites, while particulate PAHs contributed more than 90% of the toxic power according to benzo(a)pyrene-equivalent carcinogenic parameter. Different seasonal trend of PAH concentrations was observed between the two sites, and it may be explained by complicated factors such as sampling heights, local/regional emission sources, and climatic conditions. The gas-particle partitioning of PAHs in all samples was calculated, and strong linear correlations between log K (p) and log P(L)° were observed, with shallower slopes (m(r)) at the suburban site than the urban one and in warm season than the cold months, indicating the different equilibrium conditions of PAHs in spatial and seasonal scales in Shanghai. The slope (m(r) = - 0.96) and correlation coefficient (R² = 0.81) for four-ring PAHs were closest to theoretical equilibrium conditions among compounds with various aromatic rings. Finally, the potential PAH sources were estimated based on principal factor analysis with multiple linear regressions. Ground volatilization dominated the PAH pollutions at both sites, while vehicles and coal consumption were the other main emission sources, which totally contributed 32.0% (suburban) to 49.2% (urban) of PAH mass in Shanghai atmosphere. The effects of wood and biomass burning were also detected, but their contributions to PAHs were negligible.
Authors:
Yingjun Chen; Yanli Feng; Shengchun Xiong; Dongyan Liu; Gang Wang; Guoying Sheng; Jiamo Fu
Related Documents :
11368215 - Mobilization of soil organic matter by complexing agents and implications for polycycli...
15581935 - Influence of pre-treatment step on pahs analyses in contaminated soils.
17258265 - Distribution patterns of polycyclic aromatic hydrocarbons (pahs) in the sediments and f...
15242455 - Co-composting of pah-contaminated soil with poultry manure.
20496185 - Diffusion and accumulation in cultivated vegetable plants of di-(2-ethylhexyl) phthalat...
18553405 - Achieving the nitrite pathway using aeration phase length control and step-feed in an s...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-02-10
Journal Detail:
Title:  Environmental monitoring and assessment     Volume:  172     ISSN:  1573-2959     ISO Abbreviation:  Environ Monit Assess     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2010-12-03     Completed Date:  2011-03-18     Revised Date:  2011-07-18    
Medline Journal Info:
Nlm Unique ID:  8508350     Medline TA:  Environ Monit Assess     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  235-47     Citation Subset:  IM    
Affiliation:
Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong Province, 264003, China.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Air Pollutants / analysis*
China
Environmental Monitoring / methods*
Polycyclic Hydrocarbons, Aromatic / analysis*
Chemical
Reg. No./Substance:
0/Air Pollutants; 0/Polycyclic Hydrocarbons, Aromatic

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Use of object-oriented classification and fragmentation analysis (1985-2008) to identify important a...
Next Document:  Dietary exposure of three passerine species to PCDD/DFs from the Chippewa, Tittabawassee, and Sagina...