Concentrations and Profiles of Polychlorinated Dibenzo-p-Dioxins and Dibenzofurans in Soils from Korea

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• 作者：Sook Hyeon Im ; KurunthachalamKannan ; John P. Giesy ; MuneakiMatsuda ; and Tadaaki Wakimoto
• 刊名：Environmental Science & Technology
• 出版年：2002
• 出版时间：September 1, 2002
• 年：2002
• 卷：36
• 期：17
• 页码：3700 - 3705
• 全文大小：123K
• 年卷期：v.36,no.17(September 1, 2002)
• ISSN：1520-5851

文摘

Soil samples were collected from Changwon and MasanCities, Korea, and analyzed for polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs/DFs). Nearly all tetra-through octachlorinated PCDDs/DFs including the 17 2,3,7,8-substituted PCDDs/DFs were detected in all samples.Total concentrations of PCDDs/DFs and of 2,3,7,8-tetrachlorinated dibenzo-p-dioxin (TeCDD) equivalents(TEQs) in soils ranged from 35 to 121 400 pg/g, dry weight,and from 0.2 to 3720 pg of I-TEQ/g, respectively. On thebasis of guidelines for TEQ concentrations established inGermany and the United States, 9 of 23 soil samples (39% ofthe total samples analyzed) could not be expected topose human health hazards. The rest of 61% of soils needmeasures such as investigations of source identification,soil decontamination, and/or soil removal. Total concentrationsof PCDDs/DFs were greater at or near four industrialsites, which are concerned with the steel industry,petrochemical-related industry, and industrial wasteincineration, than other areas. This indicates the presenceof potential source areas. Soil collected from a site 50 mfrom an open-burning industrial waste incinerator in anindustrial complex was heavily contaminated, containing atotal concentration of PCDDs/DFs of 121 400 pg/g, dryweight. PCDDs/DFs were also detected in soils from thetop of a 200 m mountain indicating a wide dispersal of PCDDs/DFs by atmospheric transport from point source areas.The congener pattern and relative proportions of PCDFsin soils suggest that commercial PCB preparations such asKanechlors may be one of the sources. The wide rangeof PCDD/DF isomers detected in soils from many locationsalso suggests a multitude of sources, in addition tocommercial PCBs, such as incineration of industrial wastessuch as car tires, scrap wires, plastics, papers, andemission of automobile exhaust.