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现代地质 ›› 2012, Vol. 26 ›› Issue (5): 859-864.

• 地球化学 • 上一篇    下一篇

北京市平原区土壤中硒的含量和分布

 郭莉1,2, 杨忠芳1, 阮起和3, 胡省英3, 周亚男3, 冯辉3   

  1. 1 中国地质大学 地球科学与资源学院,北京100083;2 北京市地质调查研究院,北京102206;
    3 北京市地质勘察技术院,北京102218
  • 收稿日期:2012-05-03 修回日期:2012-07-10 出版日期:2012-10-19 发布日期:2012-10-23
  • 通讯作者: 杨忠芳,女,教授,博士生导师,1961年出生,地球化学专业,主要从事环境地球化学与生态地球化学研究工作。Email:zfyang@up.point.com。
  • 作者简介:郭莉,女,工程师,1975年出生,地球化学专业,主要从事农业地质、土壤环境地球化学调查和研究工作。Email:guoli-mail@163.com。
  • 基金资助:

    中国地质调查局项目“北京市多参数立体地质调查”(基[2004\]011-01);中国地质调查局项目全国土壤现状调查及污染防治专项“典型地区土地质量地球化学评估”(GZTR20060301,GZTR20070301)。

Content and Distribution of Selenium in Soil of Beijing Plain

 GUO  Chi-1,2, YANG  Zhong-Fang-1, RUAN  Qi-He-3, HU  Sheng-Yang-3, ZHOU  E-Nan-3, FENG  Hui-3   

  1. 1 School of Earth Sciences and Resources, China University of Geosciences, Beijing100083, China;2 Beijing Institute of Geological
    Survey, Beijing102206,China;3 Beijing Institute of Geoexploration Technology, Beijing102218, China
  • Received:2012-05-03 Revised:2012-07-10 Online:2012-10-19 Published:2012-10-23

摘要:

通过对北京平原土壤硒含量调查和研究,发现北京平原分布有高硒土壤,其特征为沿平原区西部山前断续出现,在北京市区零星分布。表层土壤硒含量为0.04~5.26 mg/kg,平均值为0.20 mg/kg,深层土壤硒含量为0.043~0.22 mg/kg,平均值为0.081 mg/kg,总体趋势是硒在表层土壤富集;各类岩石中以炭质页岩中含硒量最高,北京西部富硒炭质页岩的风化可能为平原区土壤硒的来源。相关性分析表明,土壤中Se与有机质呈正相关性,有机质对表层土壤Se具有强烈的吸附与固定作用。

关键词: 北京平原, 土壤, 岩石,

Abstract:

 Based on geochemical study of soil, the high selenium soil in Beijing Plain was discovered distributing discontinuously around the west of plain and scatters in the city. The content of selenium in surface soil is from 0.04 to 5.26 mg/kg, with the average value of 0.20 mg/kg. The content of selenium in deep soil is from 0.043 to 0.22 mg/kg, with the average value of 0.081 mg/kg. The selenium tends to enrich in the surface soil. The content of selenium in shale is higher than that in other types of rocks. The source of selenium in soils is from the weathering of Se-rich carbonaceous rocks in the west part of Beijing. Studies show that the soil organic matter is closely related to selenium,and that organic matter plays a key role in adsorption and fixation of selenium in surface soil.

Key words: Beijing Plain, soil;rock, selenium