污水处理厂污水和污泥中PAHs的残留及风险研究进展

摘要

Polycyclic aromatic hydrocarbons ( PAHs ) are a well⁃known group of toxic compounds. Because of their toxic, mutagenic and carcinogenic properties, 16 PAHs have been identified as prior controlled pollutants by the United States Environmental Protection Agency ( US EPA) . As the media for movement and transformation of regional pollutants, wastewater treatment plant ( WWTP) plays an important role in preventing PAHs from entering natural water⁃body. Thus it has important significance to study PAHs in WWTP. This paper reviews the pretreatment technology, analysis methods, concentration and ecological risk of PAHs in wastewater and sludge. The land application status of sludge from WWTP is also summarized.%多环芳烃（ PAHs）是一类极其复杂的有机污染物，衍生物种类较多，1976年美国环保局因其致癌、致畸、致突变将其中的16种列为优先控制污染物。城市污水处理厂作为一个地区污染物迁移和转化的重要媒介，在控制和截断PAHs进入天然水体的过程中扮演着重要的角色。因此，研究污水处理厂中PAHs的浓度水平对于了解和控制PAHs进入天然水体和通过污泥进入到土壤中进而通过食物链危害人类健康具有重要的意义。文章综述了污水处理厂污水和污泥中PAHs的前处理技术、分析方法、浓度水平、生态风险以及国内外污水处理厂污泥土地利用现状。