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Distribution and sources of polycyclic aromatic hydrocarbons in Wuhan section of the Yangtze River, China 总被引:9,自引:0,他引:9
Polycyclic aromatic hydrocarbons (PAHs) are important organic contaminants with great significance for China, where coal burning
is the main source of energy. In this study, concentrations, distribution between different phases, possible sources and eco-toxicological
effect of PAHs of the Yangtze River were assessed. PAHs in water, suspended particulate matters (SPM) and sediment samples
at seven main river sites, 23 tributary and lake sites of the Yangtze River at the Wuhan section were analyzed. The total
concentrations of PAHs in the studied area ranged from 0.242 to 6.235 μg/l in waters and from 31 to 4,812 μg/kg in sediment.
The average concentration of PAHs in SPM was 4,677 μg/kg, higher than that in sediment. Benzo(a)pyrene was detected only at
two stations, but the concentrations were above drinking water standard. The PAHs level of the Yangtze River was similar to
that of some other rivers in China but higher than some rivers in foreign countries. There existed a positive relationship
between PAHs concentrations and the TOC contents in sediment. The ratio of specific PAHs indicated that PAHs mainly came from
combustion process, such as coal and wood burning. PAHs may cause potential toxic effect but will not cause acute biological
effects in sedimentary environment of the Wuhan section of the Yangtze River. 相似文献