title: Baseline soil levels of PCDD/Fs established prior to the construction of municipal solid waste incinerators in China.
abstract: In order to determine the baseline contamination by polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) in different areas in China, prior to the construction of municipal solid waste incinerators (MSWIs), a total of 32 representative soil samples was collected near 16 incinerators and analyzed for their PCDD/F concentrations. The PCDD/F baseline concentrations in the soil samples ranged from 0.32 to 11.4 ng I-TEQ kg(-1) (dry matter), with average and median value of 2.73 and 2.24 ng I-TEQ kg(-1) (dry matter), respectively, and a span between maximum and minimum recorded value of 36. The PCDD homologues predominated in 26 out of 32 soil samples, with the ratio (PCDDs)/(PCDFs) ranging from 1.1 to 164; however in the other 6 samples, PCDF homologues were larger, with the same ratio varying from 0.04 to 0.8. Principal component analysis (PCA) and hierarchical cluster analysis (HCA) were used to examine PCDD/F amount and profile in these soil samples, and their possible associations with known emission sources: in this process 6 really distinct isomer fingerprints were identified. Background PCDD/F levels and profiles were comparable to those found in soils from China and other countries and indicate a rather low baseline PCDD/F contamination of soils. The present data provide the tools for future assessment of a possible impact of these MSWIs.
authors: State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China.
authors: Hong-mei
authors: HM
authors: Liu
authors: Sheng-yong
authors: SY
authors: Lu
authors: Alfons G
authors: AG
authors: Buekens
authors: Tong
authors: T
authors: Chen
authors: Xiao-dong
authors: XD
authors: Li
authors: Jian-hua
authors: JH
authors: Yan
authors: Xiao-jun
authors: XJ
authors: Ma
authors: Ke-fa
authors: KF
authors: Cen
mesh_terms: D001572:Benzofurans / Q000032:analysis* / Q000592:standards; D002681:China; D002947:Cities; D000072338:Dibenzofurans, Polychlorinated; D004784:Environmental Monitoring; D017745:Incineration / Q000592:standards*; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis / Q000592:standards; D012989:Soil Pollutants / Q000032:analysis* / Q000592:standards
chemical_list: D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D000072317:Polychlorinated Dibenzodioxins; D012989:Soil Pollutants