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首页> 外文期刊>The Science of the Total Environment >Rare earth elements in surface specific urban runoff in Northern Beijing
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Rare earth elements in surface specific urban runoff in Northern Beijing

机译：北京北部城市地表径流中的稀土元素

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摘要

Rare earth elements (REEs) have been increasingly diffused to the environment through mining activities and the extensive use in modern commodities, vehicular activities, coal burning and various environmental and agricultural applications. Studies of REEs in urban environments are limited with no data on REEs in urban runoff. To investigate the concentration and distribution of REEs, a total of 150 runoff samples were collected from trafficked areas, rooftops and residential parking lots in a moderate to densely populated area in Beijing, China. The runoff samples were separated into dissolved and particulate phases and analyzed by ICP-MS. The REEs were mainly (>80%) found in the runoff particulate material. The sum of REEs (∑REE) total concentrations in urban stormwater runoff samples ranged from 0.16 to 185 μg/l. The observed mean total concentration of XREE in the runoff samples were 3-14 folds higher and dissolved fractions 1.5 to 6 times higher than published concentrations for recipients such as sewage channels and rivers. The distribution of REEs in runoff was dominated by light REE. Cluster analysis and Pearson's correlations revealed a strong association between the individual REEs pointing to a similar source. Higher Ce concentrations compared to other REEs indicated strong influence from traffic emission particulates. The La/Sm (5.90-8.05). La/Ce (0.53-0.58) and Ce/Yb (31.0-42.7) ratios pointed to REE sources from traffic emissions and coal burning thus defining an urban fingerprint
机译：稀土元素（REEs）通过采矿活动以及在现代商品，车辆活动，燃煤以及各种环境和农业应用中的广泛使用而越来越多地扩散到环境中。关于城市环境中稀土元素的研究是有限的，没有关于城市径流中稀土元素的数据。为了研究稀土元素的浓度和分布，从中国北京中到人口稠密地区的人口贩运区，屋顶和住宅停车场收集了150个径流样品。径流样品分为溶解相和颗粒相，并通过ICP-MS分析。稀土元素主要存在于径流颗粒物质中（> 80％）。城市雨水径流样品中的稀土元素总和（∑REE）范围为0.16至185μg/ l。观测到的径流样品中XREE的平均总浓度比污水渠和河流等接收者公布的浓度高3-14倍，溶解度高1.5至6倍。径流中稀土元素的分布以轻稀土元素为主。聚类分析和Pearson的相关性揭示了指向相似来源的各个REE之间的紧密联系。与其他REE相比，Ce浓度更高表明交通排放颗粒物的影响很大。 La / Sm（5.90-8.05）。 La / Ce（0.53-0.58）和Ce / Yb（31.0-42.7）的比例指出了交通排放和燃煤产生的REE来源，从而定义了城市指纹

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  • 来源
    《The Science of the Total Environment》 |2020年第may15期|136969.1-136969.10|共10页
  • 作者

    Md Tariqul Islam Shajib; Hans Christian Bruun Hansen; Tao Liang; Peter Engelund Holm;

  • 作者单位

    Department of Plant and Environmental Sciences University of Copenhagen Frederiksberg C Denmark Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China Sino Danish Center for Education and Research (SDC) China;

    Department of Plant and Environmental Sciences University of Copenhagen Frederiksberg C Denmark Sino Danish Center for Education and Research (SDC) China;

    Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China Sino Danish Center for Education and Research (SDC) China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Particulate REE; Urban fingerprint; LREE; Source of REE; Rain events; Cerium;

    机译：颗粒稀土;城市指纹;LREE;稀土来源;降雨事件;铈;

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