Spatial and seasonal variations of polycyclic aromatic hydrocarbons in Haihe Plain, China |
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Authors: | Wang Rong Cao Hongying Li Wei Wang Wei Wang Wentao Zhang Liwen Liu Jiumeng Ouyang Huiling Tao Shu |
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Institution: | a Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China b Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China |
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Abstract: | A dynamic fugacity model was developed to simulate the spatial and seasonal variations of PAHs in Haihe Plain, China. The calculated and measured concentrations exhibited good consistency in magnitude with deviations within a factor of 4 in air and 2 in soil. The spatial distributions of PAHs in air were mainly controlled by emission while the seasonal variations were dominated by emission and gas-particle partition. In soil, the spatial distributions of PAHs were controlled by the soil organic carbon content while the seasonal variations were insignificant. The severest soil contamination was observed in Shanxi and followed by the southwest of Hebei province. Transfer fluxes of total PAHs between air and soil were calculated. The spatial distribution of air-to-soil flux was closely related to the landcover while the soil-to-air flux changed with soil organic matter content. Monte Carlo simulation was done to evaluate the uncertainty of the estimated results in air. |
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Keywords: | PAHs Dynamic fugacity model Haihe Plain Spatial distribution Seasonal variation Exchange flux |
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