Dispersion modeling of polycyclic aromatic hydrocarbons from combustion of biomass and fossil fuels and production of coke in Tianjin, China

Journal Article · Tue Aug 01 00:00:00 EDT 2006 · Environmental Science and Technology

OSTI ID:20781534

Tao, Shu; Li, Xinrong; Yang, Yu; Coveney, Jr, Raymond M; Lu, Xiaoxia; Chen, Haitao; Shen, Weiran ^[1]

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1. Peking University, Beijing (China). Laboratory for Earth Surface Processes, College of Environmental Sciences

A USEPA procedure, ISCLT3 (Industrial Source Complex Long-Term), was applied to model the spatial distribution of polycyclic aromatic hydrocarbons (PAHs) emitted from various sources including coal, petroleum, natural gas, and biomass into the atmosphere of Tianjin, China. Benzo(a)pyrene equivalent concentrations (BaPeq) were calculated for risk assessment. Model results were provisionally validated for concentrations and profiles based on the observed data at two monitoring stations. The dominant emission sources in the area were domestic coal combustion, coke production, and biomass burning. Mainly because of the difference in the emission heights, the contributions of various sources to the average concentrations at receptors differ from proportions emitted. The shares of domestic coal increased from {approximately} 43% at the sources to 56% at the receptors, while the contributions of coking industry decreased from {approximately} 23% at the sources to 7% at the receptors. The spatial distributions of gaseous and particulate PAHs were similar, with higher concentrations occurring within urban districts because of domestic coal combustion. With relatively smaller contributions, the other minor sources had limited influences on the overall spatial distribution. The calculated average BaPeq value in air was 2.54 {+-} 2.87 ng/m{sup 3} on an annual basis. Although only 2.3% of the area in Tianjin exceeded the national standard of 10 ng/m{sup 3}, 41% of the entire population lives within this area. 37 refs., 9 figs.

• OSTI ID: 20781534
• Journal Information: Environmental Science and Technology, Vol. 40, Issue 15; Other Information: [e-mail]; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
01 COAL, LIGNITE, AND PEAT
09 BIOMASS FUELS
02 PETROLEUM
03 NATURAL GAS
20 FOSSIL-FUELED POWER PLANTS
CHINA
SPATIAL DISTRIBUTION
POLYCYCLIC AROMATIC HYDROCARBONS
COAL
PETROLEUM
NATURAL GAS
BIOMASS
COMBUSTION
PARTICULATES
BENZOPYRENE
RESIDENTIAL SECTOR
URBAN AREAS
COKE
COKING PLANTS
POLLUTION SOURCES
RISK ASSESSMENT
CALCULATION METHODS
MATHEMATICAL MODELS
COMPUTERIZED SIMULATION
ECOLOGICAL CONCENTRATION
RURAL AREAS
SEASONAL VARIATIONS
AIR POLLUTION MONITORING
GASEOUS WASTES
VEHICLES
FOSSIL-FUEL POWER PLANTS
ENVIRONMENTAL EXPOSURE