株洲市区农业土壤中多环芳烃的分布特征研究

Study on the Distribution Characteristics of Polycyclic Aromatic Hydrocarbons in Agricultural Soils in Zhuzhou City

采集株洲市区农业土壤表层样品185个,用高效液相色谱法对16种多环芳烃(PAHs)进行检测。结果表明,除萘外,其余15种PAHs均有不同程度的检出,以苯并[b]萤蒽、萤蒽和苯并菲等3或4环PAHs为主,总量在ND^5521μg/kg之间,平均280μg/kg。地域上,石峰区、芦淞区>天元区>荷塘区;从土地利用类型看,旱地>水田>林地。按Maliszewska-Kordybach土壤污染程度分级标准,株洲市区农业土壤总体上受到PAHs轻度污染,这些PAHs主要来源于工业生产、交通运输等过程中化石燃料的燃烧。

185 surface soil samples of agricultural zone in Zhuzhou city were collected. The concentrations of polycyclic aromatic hydrocarbons （PAHs） in samples were determined by HPLC. The results showed that 15 kinds PAHs were detected with the exception of naphthalene. The total concentrations of PAHs in soil samples ranged from ND to 5521μg·kg^-1 with the average concentration of 280μg · kg^-1. PAHs in the collected soil samples were dominated by its 3 - rig and 4 - rig members such as benzo （b） fluoranthene, fluoranthene,ehrysene. The orders of ∑PAHs related to different districts and land use types are （Shifeng Distfict,Lusong District） 〉 Tianyuan District 〉 Hetang District and dry soils 〉 paddy soils 〉 woodland soils. According to the Maliszewska - Kordybach softs PAHs pollution classification standard, agrieuhural soils of Zhuzhou city have been polluted by PAHs lightly, which mainly generated from the combustion of fossil fuels in industrial production and transportation process.