Remobilization of polycyclic aromatic hydrocarbons during the resuspension of Yangtze River sediments using a particle entrainment simulator

被引：59

作者：

Feng, Jinglan ^{[1
]}

Yang, Zhifeng ^{[1
]}

Niu, Junfeng ^{[1
]}

Shen, Zhenyao ^{[1
]}

机构：

[1] Beijing Normal Univ, State Key Lab Water Environm Simulat, Sch Environm, Beijing 100875, Peoples R China

来源：

ENVIRONMENTAL POLLUTION | 2007年 / 149卷 / 02期

关键词：

polycyclic aromatic hydrocarbons; remobilization; sediment resuspension; Yangtze river; particle entrainment simulator;

D O I：

10.1016/j.envpol.2007.01.001

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Remobilization of 16 polycyclic aromatic hydrocarbons (PAHs) during sediment resuspension was investigated using a particle entrainment simulator at shear stress from 0.2 to 0.5 N m(-2), typical of the energy levels present in many tidally driven aquatic environments. The results suggested that desorption from the entrained particles was the primary source of dissolved PAHs. EPAHs concentrations in particles on volume normalization increased about four times. However, on mass weight basis, EPAHs concentrations decreased from 6039.74 +/- 138.28 pg kg(-1) to 1665.39 +/- 112.26 mu g kg(-1). The same trend was observed for individual PAHs. Dissolved concentrations of PAHs demonstrated significant differences depending on molecular weight and applied shear. The distribution of PAHs between particle and water phase suggested that for three-ring PAHs, the amounts of PAHs in particles were higher than the predicted values during our experiments. This might be due to presence of another active sorbent. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：193 / 200

页数：8

共 34 条

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