摘要
在乌鲁木齐市周边，从乌拉泊到水西沟按不同距离与深度进行土壤样品采集，采用索氏提取法与层析净化法进行预处理，高效液相色谱法测定土壤中16种多环芳烃（PAHs）的含量，并对PAHs进行对比分析、污染评价和来源分析的相关研究。结果表明：总PAHs平均浓度为998．23（306．94～3652．16）ng／g，污染程度差异不大，处中度污染水平但更接近严重污染水平；16种PAHs的最低检测限为0．20～0．80ng／g；一些采样点的表层土壤中苯并[a]芘的含量高于土壤质量控制标准。不同层次土壤PAHs的污染程度有所不同，其顺序为表层〉中层〉下层；高分子量（4～6环）PAHs占据了总含量的84．1％，低分子量（2～3环）PAHs占据15．9％，得出在乌鲁木齐市周边土壤中PAHs的重要来源是汽车排放，同时煤燃烧排放的贡献也很大。
Representative soil samples were collected from surrounding parts of Urumqi in different distances and different depths from Wulapo to Shuixigou, Soxhlet extraction method and chromatographic purification method were employed for 16 kinds of PAHs preparation prior to analysis with High Performance Liquid Chromatography （HPLC） method, and the comparative analysis, pollution assessment and source analysis were carried on. The results showed that the concentrations of the total PAHs （T-PAHs） range from 306.94 ng/g to 3 652.16 ng/g with the mean value of 998.23 ng/g, although the pollution situation belonged to the moderate pollution level but was very close to the serious pollution. The minimum detection limits for the 16 PAHs range from 0.20 ng/g to 0.80 ng/g. Bap concentrations in some sites exceeded the suggested standards. PAHs contamination degrees of soil were different in different depths, and the order followed as： top layer 〉 middle layer 〉 bottom layer. High molecular weight PAHs accounted for 84.1% and low molecular weight PAHs account for 15.9% of the total contents. These suggested that automobile emission is still the most important source of PAHs in surrounding environment of Urumqi, while coal combustion is negligible.
作者
麦麦提.斯马义
帕丽达.牙合甫
努尔比亚.藿加吾买尔
MAIMAITI＇Simayi PALIDA＇Yahefu NUERBIYA.Huojiawumaier(College of Grassland and Environment Sciences, Xinjiang Agricultural University, Urumqi 830052, Chin)
出处
《土壤》
CAS
CSCD
北大核心
2016年第6期1166-1171,共6页
Soils
基金
国家自然科学基金项目(21167017
20567028)资助
关键词
PAHS
土壤
乌鲁木齐市周边
高效液相色谱法
Polycyclic aromatic hydrocarbons（PAHs）
Soil
Surrounding of Urumqi
High-Performance LiquidChromatography
