title: [Pollution characteristics and sources of polycyclic aromatic hydrocarbons in urban rivers of Wenzhou city].
abstract: Concentrations of 18 polycyclic aromatic hydrocarbons (PAHs) in water and surface sediments collected from the urban rivers of Wenzhou city in spring and summer were measured by GC-MS. The results showed that the total PAHs concentrations in water and sediments of the studied rivers varied in ranges of 146.74-3 047.89 ng x L(-1) and 21.01-11 990.48 ng x g(-1), respectively. Higher concentrations occurred in spring. The low and middle rings of 2-4-ring were dominant in both water and sediments, but the concentrations of 5-ring and 6-ring PAHs in sediments were relatively higher than those in water. The EBaP values of PAHs in water of the studied rivers in spring and summer were 1.69-51.95 ng x L(-1) and 0-3.03 ng x L(-1), respectively. Eighty percent of water samples in spring surpassed the limits of BaP in surface water of China. The concentrations of sigma PAHs in the sediments both in spring and summer were lower than the ERM value, but part of the components of PAHs had values higher than the ERM, suggesting possible toxic effect on living organisms. Based on the PAHs molecule ratios and principal component analysis, a mixed PAHs source of petroleum and combustion in water and sediments was diagnosed, while sediments showed a greater proportion of combustion sources.
authors: Key laboratory of Geo-information Science, Ministry of Education, School of Resources and Environmental Science, East China Normal University, Shanghai 200241, China. bebecky@163.com
authors: Jie-Cheng
authors: JC
authors: Zhou
authors: Zhen-Lou
authors: ZL
authors: Chen
authors: Chun-Juan
authors: CJ
authors: Bi
authors: Jin-Gang
authors: JG
authors: Lü
authors: Shi-Yuan
authors: SY
authors: Xu
authors: Qi
authors: Q
authors: Pan
mesh_terms: D002681:China; D002947:Cities; D004784:Environmental Monitoring / Q000379:methods; D019015:Geologic Sediments / Q000737:chemistry; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D045483:Rivers; D012621:Seasons; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical