【摘要】 为加强对二恶英类物质污染现状及污染途径的调查研究,为切实有效地控制其污染,并为制定相关法律、法规提供可靠的依据,综合国外土壤中二恶英类物质环境污染调查的文献资料及本实验室对北京地区的调查研究结果,介绍了全球土壤的二恶英类物质污染概况,指出土壤中二恶英类物质的主要污染源有城市固体垃圾焚烧、有机含氯化合物的合成和使用、汽车尾气排放等,不同的污染源,其二恶英类物质特征分布形态不同,通过对样品中二恶英类物质的异构体类型及其分布形态的分析,可以追溯污染的起源。对北京地区的初步研究显示北京地区土壤中二恶英类物质的污染水平相对较低,但这还不足以说明该地区的二恶英类物质整体污染水平,还需对污染疑似地区土壤进行全面系统的研究,同时对全国其他地区的调查研究也是急为迫切的。更多还原

【Abstract】 In order to control pollution and provide credible reference to correlative laws and codes, this paper uses information from the literature and experimental results for evaluating dioxin concentrations in soil samples collected from Beijing to introduce the source of dioxins and an outline of global soil contamination with dioxins. The homologue profile of PCDD/Fs and 2, 3, 7, 8-substituted congener-specific PCDD/Fs pattern in soil samples were used to trace the sources. The preliminary study shows that soils in the Beijing area have not been heavily polluted by PCDD/Fs, but it is not enough to illuminate the whole level in the Beijing area. It is necessary and urgent to evaluate the suspect areas and other regions in China systematically.更多还原