生态环境学报2016，Vol.25Issue(2)：314-319,6.DOI:10.16258/j.cnki.1674-5906.2016.02.019
南京市不同功能区林业土壤多环芳烃含量与来源分析
Characterization and Sources of Polycyclic Aromatic Hydrocarbons in Urban Forestry Soil from Different Functional Areas of Nanjing City
摘要
Abstract
Urban forestry soil is major medium of urban green landscape, with the enhancement of ecological and environmental consciousness, people pay more attention to urban forestry soil ecological environment. Urban forestry soil has its has its special characteristics, and is seriously disturbed by man’s activities. Therefore, more soil environmental problems are appearing. In order to learn more about the contamination level and characteristic of sources of polycyclic aromatic hydrocarbons (PAHs) in Nanjing forestry soil, samples of urban forestry soil in eight different functional areas were collected. The concentration of 16 priority polycyclic aromatic hydrocarbons (PAHs) in soil was detected by high performance liquid chromatography (HPLC), characteristic of enrichment and sources were analyzed by relative enrichment factors (lge) and isomeric ratios, respectively. The results showed that the total concentration of soil 16 PAHs ranged from 156.67 µg·kg-1 to 1 523.34 µg·kg-1, with an average value of (487.7±264.3) µg·kg-1 in Nanjing forestry soil, and 83.3%of soil samples were weakly contaminated, and pollution level are different in various functional area. The total PAHs concentrations in topsoil were in the order of urban compass (949.3 µg·kg-1) > road green belts (550.1 µg·kg-1) > university (525.4 µg·kg-1) > residential areas (513.0 µg·kg-1) > power plant (501.4 µg·kg-1) > landfill (328.7 µg·kg-1)>suburban forest (293.8 µg·kg-1)>rural forest (271.7 µg·kg-1),there are the same order in the middle layer and lower layer. There was significant association between w(PAHs) and both w(SOC) and w(BC), while w(BC) showed a stronger correlation. PAHs particularly accumulated in topsoil in landfill, power plant, urban overpass and residential areas, however PAHs enrichment appeared in lower layer in other functional areas. Though the soil PAHs sources of different functional areas were different, the main sources of them were the Vehicle emission and the combustion of biomass and fossil fuel, petroleum origin was the main sources in some samples.关键词
城市林业土壤/多环芳烃/来源/南京Key words
urban forestry soil/polycyclic aromatic hydrocarbons/source/Nanjing分类
资源环境引用本文复制引用
杨靖宇,俞元春,王小龙..南京市不同功能区林业土壤多环芳烃含量与来源分析[J].生态环境学报,2016,25(2):314-319,6.基金项目
国家自然科学基金项目（31270664；31511130024）；高等学校博士学科点专项科研基金项目（20123204110004）；江苏省普通高校研究生科研创新计划项目（CXZZ13_0533）；江苏高校优势学科建设工程项目 （）
