Spatial Patterns of Soil Heavy Metals in Urban-Rural Transition Zone of Beijing

HU Ke-Lin; ZHANG Feng-Rong; LI Hong; HUANG Feng; LI Bao-Guo

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Spatial Patterns of Soil Heavy Metals in Urban-Rural Transition Zone of Beijing

机译：北京市城乡过渡带土壤重金属的空间格局

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To identify the main sources responsible for soil heavy metal contamination, 70 topsoils were sampled from the Daxing County in the urban-rural transition zone of Beijing. The concentrations of heavy metals Cu, Zn, Pb, Cr, Cd, Ni,As, Se, Hg, and Co; the soil texture; and the organic matter content were determined for each soil sample. Descriptive statistics and geostatistics were used to analyze the data, and Kriging analysis was used to estimate the unobserved points and to map the spatial patterns of soil heavy metals. The results showed that the concentrations of all the soil heavy metals exceeded their background levels with the exception of As and Se. However, only the Cd concentration in some areas exceeded the critical value of the national soil quality standard. The semivariance analysis showed that the spatial correlation distances for soil Cu, Zn, Cr, Cd, As, Ni, and Co ranged from 4.0 to 7.0 km, but soil Se, Pb, and Hg had a larger correlation distance. Soil Co, Se, Cd, Cu and Zn showed a strong spatial correlation, whereas the other soil heavy metals showed medium spatial correlation. Soil heavy metal concentrations were related to soil texture, organic matter content, and the accumulation of heavy metals in the soils, which was because of air deposition and use of water from the Liangshui, Xinfeng, and Fenghe rivers that are contaminated by wastewater and sewage for the purpose of irrigation of fields. Hence, a comprehensive treatment plan for these rivers should be formulated.

机译：为了确定造成土壤重金属污染的主要来源，从北京城乡过渡区的大兴县抽取了70种表土。重金属Cu，Zn，Pb，Cr，Cd，Ni，As，Se，Hg和Co的浓度;土壤质地;测定每个土壤样品的有机质含量。描述性统计和地统计学用于分析数据，Kriging分析用于估计未观测点并绘制土壤重金属的空间格局。结果表明，除砷和硒外，所有土壤重金属的浓度均超过其本底水平。但是，只有某些地区的镉浓度超过了国家土壤质量标准的临界值。半方差分析表明，土壤Cu，Zn，Cr，Cd，As，Ni和Co的空间相关距离在4.0至7.0 km之间，而土壤Se，Pb和Hg的空间相关距离更大。土壤Co，Se，Cd，Cu和Zn表现出很强的空间相关性，而其他土壤重金属则表现出中等的空间相关性。土壤重金属浓度与土壤质地，有机质含量以及土壤中重金属的积累有关，这是由于凉水，新丰河和丰河河的空气沉积和水的使用受到废水和污水的污染为了田间灌溉因此，应制定这些河流的综合处理方案。

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来源
《土壤圈（英文版）》 |2006年第6期|690-698|共9页
作者
HU Ke-Lin; ZHANG Feng-Rong; LI Hong; HUANG Feng; LI Bao-Guo;
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作者单位

College of Resources and Environmental Sciences,China Agricultural University, Beijing 100094(China);

College of Resources and Environmental Sciences,China Agricultural University, Beijing 100094(China);

College of Resources and Environmental Sciences,China Agricultural University, Beijing 100094(China);

Texas A & M University, Texas Agricultural Experiment Station, Agricultural Research and Extension Center, Bushland,TX 79012 (USA);

College of Resources and Environmental Sciences,China Agricultural University, Beijing 100094(China);

College of Resources and Environmental Sciences,China Agricultural University, Beijing 100094(China);

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收录信息中国科学引文数据库(CSCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
geostatistics; heavy metal; soil contamination; soil texture; spatial variability;

机译：地统计学;重金属;土壤污染;土壤质地;空间变异性;

Spatial Patterns of Soil Heavy Metals in Urban-Rural Transition Zone of Beijing

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