Urban fractionation of polycyclic aromatic hydrocarbons from Dalian soils
Urban fractionation of polycyclic aromatic hydrocarbons from Dalian soils
复制标题
大连土壤中多环芳烃的城市分馏
DOI：
10.1007/s10311-011-0341-3
复制
发表时间：
2012-06
影响因子：
15.7
通讯作者：
Ma, Xindong
中科院分区：
文献类型：
--
作者：
Wang, Zhen;Yang, Ping;Wang, Ying;Ma, Xindong
该报告证明了多环芳烃（PAHs）从城市向农村地区的分馏，以及农村地区煤和木材燃烧的更高贡献。多环芳烃是环境中的持久性半挥发性有机污染物。多环芳烃来源于化石燃料和生物质的不完全燃烧。城市通常被认为是多环芳烃的主要来源。由于城市各功能区燃料消耗类型和负荷的不同，多环芳烃的含量和成分分布也会有所不同。因此，我们研究了中国主要城市土壤中多环芳烃分布的机制。在大连市城市交通区域、居民区和公园区域、郊区和农村地区采集了17份土壤样本。采用高效液相色谱法分析多环芳烃。研究了多环芳烃的组成特征和季节变化。结果表明，低质量分子多环芳烃占总多环芳烃的比例随着城市-郊区-城乡梯度的增大而增大。这种趋势可以用多环芳烃的“城市分馏”来解释。春季/秋季多环芳烃浓度比值大于1。其中，2环多环芳烃春秋比值为1.79,3环多环芳烃春秋比值为1.42,5环和6环多环芳烃春秋比值低于1.20。菲的春/秋比值大于1，且随离市区距离的增加而增加。结果表明，煤和木材燃烧对多环芳烃的贡献随着城市-郊区-城乡梯度的增大而增大。
This report evidences the fractionation of polycyclic aromatic hydrocarbons (PAHs) from urban to rural areas, and a higher contribution of coal and wood combustion in rural areas. PAHs are persistent semi-volatile organic pollutants in the environment. PAHs originate from the incompleted combustion of fossil fuel and biomass. Cities are usually considered as primary sources of PAHs. Due to different types and loads of fuel consumption in various functional areas of a city, the levels and composition profiles of PAHs are expected to be different. We, therefore, studied the mechanisms ruling PAH distributions in soils from a major Chinese city. Seventeen soil samples were collected in urban traffic areas, residential and park areas, suburban areas and rural areas of Dalian, northeastern China. PAHs were analyzed using a high-performance liquid chromatography. The composition profiles and seasonal variation of PAHs were investigated. Results show that the proportions of low-weight molecular PAHs to total PAHs increased with urban-suburban-rural gradient. This trend is explained by the “urban fractionation” of PAHs. Furthermore, the spring/autumn ratios of PAH concentrations were higher than 1. Specifically, the spring/autumn ratio was 1.79 for two ring PAHs, 1.42 for three ring PAHs, and lower than 1.20 for five and six ring PAHs. The spring/autumn ratios of phenanthrene were higher than 1 and increased with increasing distance from the urban areas. The results imply that the contribution of coal and wood combustion PAHs increases with the urban-suburban-rural gradient.
登录
查看更多内容
DOI：
10.1039/b805840g
发表时间：
2008-08
期刊：
Journal of environmental monitoring : JEM
影响因子：
--
作者：
De-gao Wang;Meng Yang;Hongliang Jia;Lei Zhou;Yifan Li
通讯作者：
De-gao Wang;Meng Yang;Hongliang Jia;Lei Zhou;Yifan Li
影响因子：
3
作者：
X.Y. Huang;J.W. Chen;L. Gao;G. Ding;Y.Z. Zhao;K. Schramm
通讯作者：
X.Y. Huang;J.W. Chen;L. Gao;G. Ding;Y.Z. Zhao;K. Schramm
影响因子：
11.4
作者：
Heywood, Elizabeth;Wright, Julian;Spurgeon, David J.
通讯作者：
Spurgeon, David J.
影响因子：
--
作者：
M. Kawano;B. Brudnowska;J. Falandysz;T. Wakimoto
通讯作者：
M. Kawano;B. Brudnowska;J. Falandysz;T. Wakimoto
影响因子：
11.4
作者：
Motelay-Massei, A;Harner, T;Rosenberg, B
通讯作者：
Rosenberg, B