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首页> 外文期刊>Chemosphere >Black carbon (BC) in urban and surrounding rural soils of Beijing, China: Spatial distribution and relationship with polycyclic aromatic hydrocarbons (PAHs)
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Black carbon (BC) in urban and surrounding rural soils of Beijing, China: Spatial distribution and relationship with polycyclic aromatic hydrocarbons (PAHs)

机译：中国北京城市及周边农村土壤中的黑碳（BC）：空间分布及其与多环芳烃的关系

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摘要

The concentrations of black carbon (BC), total organic carbon (TOC) and polycyclic aromatic hydrocarbons (PAHs) have been determined in soils from urban and rural areas of Beijing. The rural area can be divided into plain and mountainous areas which are close to and relatively far from the urban area, respectively. Concentration of BC (5.83 ± 3.05 mg g~1) and BC/TOC concentration ratio (0.37 ± 0.15) in Beijing's urban soil are high compared with that in world background soils and rural soils of Beijing, suggesting the urban environment to be an essential source and sink of BC. Concentration of BC in the urban area decreases from the inner city to exterior areas, which correlates with the urbanization history of Beijing and infers accumulation of BC in old urban soils. Black carbon in Beijing soils mainly comes from fossil fuel combustion, especially traffic emission. Median PAH concentration in the urban area (502 ngg-1) is one order of magnitude higher than that in the rural plain (148 ngg-1) and mountainous area (146n gg-1) where PAHs are supposed to mainly come from atmospheric deposition from the urban area. Concentrations of BC correlate significantly with those of PAHs (p < 0.01, except naphthalene) in the urban area and with those of heavier 4-, 5- and 6- ring PAHs (p < 0.01) in the adjacent rural plain area, while there is no significant correlation with any PAH in the farther rural mountainous area.
机译：已测定北京城乡土壤中的黑碳（BC），总有机碳（TOC）和多环芳烃（PAHs）的浓度。农村地区可分为平原地区和山区，分别靠近市区和相对较远的地区。与世界背景土壤和北京农村土壤相比，北京城市土壤中的BC（5.83±3.05 mg g〜1）浓度和BC / TOC浓度比（0.37±0.15）较高，表明城市环境是必不可少的公元前和后沉。城市中的BC浓度从内城到外围地区递减，这与北京的城市化历史有关，并推断BC在旧城区土壤中的积累。北京土壤中的黑碳主要来自化石燃料燃烧，特别是交通排放。城市地区（502 ngg-1）的PAH浓度中值比农村平原（148 ngg-1）和山区（146n gg-1）的PAH浓度高一个数量级，而农村地区和山区的PAHs主要来自大气沉积从市区。在城市地区，BC的浓度与PAHs的浓度（除萘除外，p <0.01）显着相关，而在邻近的农村平原地区，与四环，五环和6-环的较重PAHs的浓度（p <0.01）显着相关。与偏远农村山区的任何PAH均无显着相关性。

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  • 来源
    《Chemosphere》 |2011年第2期|p.223-228|共6页
  • 作者

    Shaoda Liu; Xinghui Xia; Yawei Zhai; Ran Wang; Ting Liu; Shangwei Zhang;

  • 作者单位

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

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

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

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

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

    Store 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《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    black carbon; urban; rural; pahs; soil;

    机译：黑炭城市乡村;帕斯泥;

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