芜湖市沉积物-水体PAHs扩散行为研究

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Abstract

In order to study the diffusion of polycyclic aromatic hydrocarbons (PAHs) between sediment and water in landscape waters of different functional areas in Wuhu, 25landscape water in Wuhu were selected to collect sediment and water samples in February 2017, 16kinds of PAHs listed as Priority Control Pollutants by the US Environmental Protection Agency (EPA) were tested and analyzed by fugacity method and response coefficient. The effects of total organic carbon (TOC), BC_CTO (black carbon measured by chemical thermal oxidation) and BC_Cr (black carbon determined by wet chemical oxidation) were investigated at different concentrations (measured value, lowest value, average value, maximum value). The results showed that 2-4rings PAHs were diffused from sediment to aqueous, and the sediments were secondary sources of PAHs. 5~6rings PAHs were diffused from aqueous phases to sediment. With the increase of the concentrations of TOC and BC, PAHs tended to diffuse into sediments and the order of sensitivity was BC_Cr > BC_CTO > OC. The diffusion process of sediment-water revealed the important mechanism of migration and diffusion of PAHs in water environment, which could provide basis for the scientific management of environmental pollution.

Key words： PAHs diffusion sediment-water interface fugacity approach response coefficient Wuhu

Received: 22 January 2018

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	XU Hong
	WANG Qing
	HUA De-wu
	CHENG Jian
	DONG Xiao-ning

Cite this article:

XU Hong,WANG Qing,HUA De-wu等. Sediment-water diffusion of PAHs in Wuhu city, China[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(8): 3094-3103.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I8/3094

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