State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China.
Chemosphere. 2012 Jan;86(3):300-7. doi: 10.1016/j.chemosphere.2011.10.033. Epub 2011 Nov 25.
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.
为了确定在中国不同地区建设城市固体废物焚烧炉（MSWIs）之前多氯二苯并对二恶英（PCDDs）和多氯二苯并呋喃（PCDFs）的基线污染情况，在 16 座焚烧炉附近共采集了 32 个代表性土壤样本，并分析了它们的 PCDD/F 浓度。土壤样本中的 PCDD/F 基线浓度范围为 0.32 至 11.4ng I-TEQ kg(-1)（干物质），平均值和中位数分别为 2.73 和 2.24ng I-TEQ kg(-1)（干物质），记录的最大值和最小值之间的跨度为 36。32 个土壤样本中有 26 个样本中以 PCDD 同系物为主，PCDDs/PCDFs 比值范围为 1.1 至 164；然而，在另外 6 个样本中，PCDF 同系物更大，相同比值范围为 0.04 至 0.8。主成分分析（PCA）和层次聚类分析（HCA）用于检查这些土壤样本中 PCDD/F 的数量和分布情况，以及它们与已知排放源的可能关联：在此过程中，确定了 6 种截然不同的同分异构体指纹。背景 PCDD/F 水平和分布与中国和其他国家土壤中的水平相当，表明土壤中的 PCDD/F 基线污染程度较低。目前的数据为未来评估这些 MSWIs 可能产生的影响提供了工具。
