title: Polychlorinated dibenzo-p-dioxins and dibenzofurans in soils and sediments from Daliao River Basin, China.
abstract: Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/F) were analyzed in surface sediments and top soils collected from 30 sites in Daliao River Basin. The concentrations of PCDD/F ranged from 0.28 to 29.01 ng TEQ kg(-1) dw (mean value, 7.45 ng TEQ kg(-1)dw) in sediments, and from 0.31 to 53.05 ng TEQ kg(-1)dw (mean value, 7.00 ng TEQ kg(-1)dw) in soils. PCDD/F pollution in sediments from the mid- and downstream sections of Hun River was found to be relatively heavy, and the levels of PCDD/F contamination in paddy soils were generally higher than those of upland soils. Using multivariate statistical analysis, the PCDD/F homologue and congener profiles of all soil and sediment samples were compared with those of suspected PCDD/F sources. The results showed that, PCDD/F contamination in most sediments of Hun River should mainly originated from the production of organochlorine chemicals, while metal smelting was the important potential source of PCDD/F in the drainage area of Taizi River. PCDD/F contamination in paddy soils should be simultaneously attributed to the polluted water irrigation and the organochlorine pesticide application.
authors.affiliation: Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, PR China.
authors.forename: Haijun
authors.initials: H
authors.lastname: Zhang
authors.forename: Yuwen
authors.initials: Y
authors.lastname: Ni
authors.forename: Jiping
authors.initials: J
authors.lastname: Chen
authors.forename: Fan
authors.initials: F
authors.lastname: Su
authors.forename: Xianbo
authors.initials: X
authors.lastname: Lu
authors.forename: Liang
authors.initials: L
authors.lastname: Zhao
authors.forename: Qing
authors.initials: Q
authors.lastname: Zhang
authors.forename: Xueping
authors.initials: X
authors.lastname: Zhang
mesh_terms: D001572:Benzofurans / Q000032:analysis* / Q000737:chemistry; D002681:China; D016000:Cluster Analysis; D000072338:Dibenzofurans, Polychlorinated; D019015:Geologic Sediments / Q000737:chemistry*; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis / Q000737:chemistry; D025341:Principal Component Analysis; D045483:Rivers / Q000737:chemistry*; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry
chemical_list: D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D000072317:Polychlorinated Dibenzodioxins; D012987:Soil; D012989:Soil Pollutants