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中文摘要：
对北京西郊石景山工业区附近的土壤剖面进行环境磁学研究，结合粒度、金属元素分析、磁学指标测试和多元统计分析，发现磁参数（χ，ARM，SIRM）与重金属元素（Mn，Cu，Fe，Pb，Zn，Al，Sr）含量呈同步垂向变化趋势．来源于工业区附近工业生产排放（钢铁厂、发电厂、水泥厂）的污染物是土壤剖面上部（0-3cm）磁性和金属含量增强的主要原因，由富集在细粉砂和中粉砂的多畴磁铁矿主导了样品的磁性特征．3—10cm重金属含量逐渐下降，土壤的磁性特征与上层相似，但磁性矿物含量降低，属于剖面中的迁移过渡阶段．10cm以下，土壤基本未受到污染，磁性矿物和重金属含量都低，磁性颗粒大小变化稳定，基本代表了该地区土壤的自然背景．指标聚类和相关分析表明，土壤磁参数与重金属元素含量显著相关．结合模糊聚类分析，磁参数可用于追踪、识别工业污染物质在土壤剖面中的富集、迁移状态，揭示不同深度土壤的污染程度．
英文摘要：
A soil profile of 74 cm length was sampled in the hillside close to Beijing Muslim＇ s Cemetery, which is located in the Yingshan Forest Park near the Shijingshan industrial area. Coal-fired power plants, a steel mill, and a cement factory are located close to the sampling site. Gray-black pollutants can be found within the uppermost part of the soil. Magnetic measurements, grain size and geochemical analysis, as well as multivariate statistics were performed. Magnetic proxies show similar trends compared to heavy metal dements with higher concentrations at the top and lower concentrations in the lower part. The anthropogenic dust input from industrial activity is the predominant cause for strong magnetic signals in the uppermost soil horizon （0 - 3 cm）. The main magnetic component is magnetite contained in the grain tim. These pollutants are observed up to about 10 cm depth. Below 10 size fractions of 4 ～ 16μm and 16 ～32 cm, there is little lowest concentration of magnetic minerals and heavy metals comparable to natural pollution in soil with background values. Multivariate statistics and fuzzy C-means cluster analysis show positive correlation of χ, ARM, SIRM and Mn, Cu, Fe, Pb, Zn, Al and Sr. Based on the results, it can be concluded that magnetic parameters can be used as a sensitive indicator for screening heavy metal pollution.
同期刊论文项目
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Magnetic Characteristic of Polluted Soil Profile nearby Shijingshan Industrial area, Western Beijing
Evidence from isotopic geochemistry as an indicator of eutrophication of Meiliang Bay in Lake Taihu,
Palaeoclimatic changes over the past one million years derived from lacustrine sediments of Heqing b
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