@entity2555 ( @entity2556 ) 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 @entity2556 of the Yangtze River were assessed. @entity2556 in water, @entity62 ( @entity62 ) 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 @entity2556 in the studied area ranged from 0.242 to 6.235 microg/l in waters and from 31 to 4,812 microg/kg in sediment. The average concentration of @entity2556 in @entity62 was 4,677 microg/kg, higher than that in sediment. @entity3014 was detected only at two stations, but the concentrations were above drinking water standard. The @entity2556 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 @entity2556 concentrations and the TOC contents in sediment. The ratio of specific @entity2556 indicated that @entity2556 mainly came from combustion process, such as @entity4808 . @entity2556 may cause potential toxic effect but will not cause acute biological effects in sedimentary environment of the Wuhan section of the Yangtze River.

Distribution and sources of XXXX in Wuhan section of the Yangtze River, China.

@entity2555 :: ('MESH:D011084', 'Chemical') :: ['Polycyclic aromatic hydrocarbons'] @entity3014 :: ('MESH:D001564', 'Chemical') :: ['Benzo(a)pyrene'] @entity2556 :: ('CHEBI:33848', 'Chemical') :: ['PAHs'] @entity4808 :: ('MESH:D002056', 'Disease') :: ['coal and wood burning'] @entity62 :: ('MESH:D056784', 'Disease') :: ['SPM', 'suspended particulate matters']
@entity2555 :: (MESH:D011084,Chemical) :: ['polycyclic aromatic hydrocarbons']
