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首页> 外文期刊>Journal of Hazardous Materials >Polycyclic aromatic hydrocarbons in urban soils of different land uses in Beijing, China: Distribution, sources and their correlation with the city's urbanization history
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Polycyclic aromatic hydrocarbons in urban soils of different land uses in Beijing, China: Distribution, sources and their correlation with the city's urbanization history

机译：北京不同土地利用类型的城市土壤中的多环芳烃：分布，来源及其与城市城市化历史的关系

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摘要

A total of 127 surface soil samples (0-20 cm) were collected from Beijing's urban district and determined for 16 polycyclic aromatic hydrocarbons (PAHs). The mean concentration of ∑PAHs was 1802.6 ng g~(-1) with a standard deviation of 1824.2 ng g~(-1). Average ∑PAHs concentration and the percentage of high-molecular weight PAHs (4-6-rings) decreased from inner city to exterior areas. This correlated with the urbanization history of Beijing's urban district and inferred an increasing trend of soil PAHs with accumulation time and age of the urban area. ∑PAHs in different land uses decreased in an order as: culture and education area (CEA) > classical garden (CG), business area (BA)> residential area (RA), roadside area (RSA)> public green space (PGS). PAHs in CEA mainly came from coal combustion, while soils of RSA exhibited clear traffic emission characteristics. PAHs in other land uses came from mixed sources. Principle component analysis followed by multivariate linear regression indicated that coal combustion and vehicle emission contributed about 46.0% and 54.0% to PAHs in Beijing's urban soils, respectively. Risk assessment based on the Canadian soil criterion indicated a low contamination level of PAHs. However, higher contents in some sensitive land uses such as CEA and CG should draw enough attention.
机译：从北京市区收集了总共127个表面土壤样本（0-20厘米），并确定了16种多环芳烃（PAHs）。 ∑PAHs的平均浓度为1802.6 ng g〜（-1），标准偏差为1824.2 ng g〜（-1）。从市中心到外围地区，平均∑PAHs浓度和高分子量PAHs（4-6环）的百分比降低。这与北京市区的城市化历史相关，并推断出土壤PAHs随市区积累时间和年龄的增加而增加。不同土地利用中的∑PAH依次为：文化和教育区（CEA）>古典花园（CG），商业区（BA）>居住区（RA），路边区（RSA）>公共绿地（PGS） 。 CEA的PAHs主要来自燃煤，而RSA的土壤表现出明显的交通排放特征。其他土地用途中的PAHs来自多种来源。主成分分析和多元线性回归分析表明，煤炭燃烧和机动车排放分别对北京城市土壤中的PAHs贡献了46.0％和54.0％。根据加拿大土壤标准进行的风险评估表明，PAHs的污染水平较低。但是，在一些敏感的土地利用中，例如CEA和CG含量较高，应该引起足够的重视。

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  • 来源
    《Journal of Hazardous Materials》 |2010年第3期|p.1085-1092|共8页
  • 作者

    Shaoda Liu; rnXinghui Xia; rnLingyan Yang; rnMohai Shen; rnRuimin Liu;

  • 作者单位

    State Key Laboratory of Water Environment Simulation/School of Environment, Beijing Normal University, Beijing 100875, China;

    rnState Key Laboratory of Water Environment Simulation/School of Environment, Beijing Normal University, Beijing 100875, China;

    rnState Key Laboratory of Water Environment Simulation/School of Environment, Beijing Normal University, Beijing 100875, China;

    rnState Key Laboratory of Water Environment Simulation/School of Environment, Beijing Normal University, Beijing 100875, China;

    rnState Key Laboratory of Water Environment Simulation/School of Environment, Beijing Normal University, Beijing 100875, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    polycyclic aromatic hydrocarbons (PAHs); urban soil; land use; urbanization history; Beijing;

    机译：多环芳烃（PAHs）;城市土壤;土地利用;城市化历史;北京;

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