| 西北干旱区黄河沿岸典型工业带表土磁性特征及其环境意义 |
| 摘要点击 3072 全文点击 1369 投稿时间：2012-12-20 修订日期：2013-02-25 |
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| 中文关键词 环境磁学 磁性矿物 表土 环境污染 西北干旱区黄河沿岸 |
| 英文关键词 environmental magnetism magnetic minerals topsoils environmental pollution along the Yellow River in arid regions in northwest China |
| 作者 | 单位 | E-mail | | 许淑婧 | 兰州大学西部环境与气候变化研究院, 兰州大学西部环境教育部重点实验室, 兰州 730000 | | | 张英 | 兰州大学西部环境与气候变化研究院, 兰州大学西部环境教育部重点实验室, 兰州 730000 | | | 余晔 | 中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室, 兰州 730000 | | | 王博 | 兰州大学西部环境与气候变化研究院, 兰州大学西部环境教育部重点实验室, 兰州 730000 | | | 夏敦胜 | 兰州大学西部环境与气候变化研究院, 兰州大学西部环境教育部重点实验室, 兰州 730000
中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室, 兰州 730000 | dsxia@lzu.edu.cn |
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| 中文摘要 |
| 对西北干旱区黄河沿岸典型工业带中两个工业城市乌海和石嘴山表土样品进行了系统的环境磁学参数的测量,分析了表土磁性矿物的含量、种类、颗粒大小,并对其环境指示意义进行研究. 结果表明,表土的磁性矿物以假单畴-多畴磁铁矿为主. 磁性矿物的浓度和颗粒大小在不同功能区表现出一定的差异,工业区表土磁性矿物的浓度最高,颗粒最粗,农业区次之,原煤区浓度最低,颗粒最细. 环境磁学监测手段对于因化石燃料燃烧而造成的污染指示较为敏感,而对未经燃烧原料的污染指示作用并不显著. χlf、SIRM、SOFT是指示城市土壤污染状况的有效指标,环境磁学方法是监测和评价城市土壤污染状况的一种重要手段. |
| 英文摘要 |
| We have carried out environmental magnetic investigation on topsoil samples of two industrial cities Wuhai and Shizuishan along the Yellow River in the arid regions in northwest China. The concentration, type, magnetic grain sizes of the magnetic minerals and the environmental significance were discussed. The results showed that the main magnetic grain sizes were multi-domain (MD) and pseudo single domain (PSD). The concentration and grain sizes of magnetic minerals showed differences in different functional zones. In industrial zone, the concentration was higher and the grain size was coarser, while there were obviously fewer and finer magnetic minerals in agricultural zone and raw coal zone. Environmental magnetic measurements were efficient to monitor pollution caused by burned fossil fuel, but were not sensitive to unburned fuel. χlf, SIRM and SOFT were effective indicators to reflect urban soil pollution. Environmental magnetism method was found to be an important way to monitor and evaluate soil pollution in a city. |
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