污泥中潜在的二■■污染物质

依据国内外最近的检测结果对污泥中二恶英物质的研究进行论述，探讨其来源，组成分布，环境行为及潜在危害。研究表明，焚烧过程排放构成了环境中二恶英的本底来源，除此之外的二恶英主要来源于废水处理（包括生活污水与工业污水）形成的污泥，并且污泥中二恶英的含量较高，鉴于二恶英的毒性特性，以往的二恶英污染事件及我国对污泥的处理方式，急需查明堆肥与填埋处理的二恶英现状，并以此为依据制定二恶英毒物的排放标准及其在环境

Potential Pollutant of Dioxins in Sewage Sludge

Based on the results of the analysis on polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofuran (PCDFs) in sewage sludge, the paper gives a review of the extremely toxic organochlorinated substance sources, constitutes, environ-mental behavior and the potential impact on the environment. Previous results suggest that the sources of dioxins in environmental ma-trixes are originated from two pathways. One is the incineration emission of combustion processes which composes the primary amount of background in the environment and the other is mainly originated from sewage sludge including the waste water treatment residues from domestic and chloroaromatic manufacture industries- Researches reveal that almost all sewage sludge contain a significant mount of PCDD/Fs. Due to the extreme toxicity and the pollution evidences of dioxins, we should pay more attentions to dioxins in the appli-cations of sewage sludge as fertilizer to agricultural soil and landfill disposal anxiously and study the situation of the potential environ-mental issue in municipal and industrial sludge. It is concluded that national emission standard and limitations pertaining to dioxins in commercial products or environmental vectors must be established in China as soon as possible.