Kriging and heavy metal pollution assessment in wastewater irrigated agricultural soil of Beijing's eastern farming regions
作者:
X.J. Wang,
期刊:
Journal of Environmental Science and Health, Part A
(Taylor Available online 1998)
卷期:
Volume 33,
issue 6
页码: 1057-1073
ISSN:1093-4529
年代: 1998
DOI:10.1080/10934529809376776
出版商: Taylor & Francis Group
关键词: Kriging;soil;heavy metal;pollution assessment
数据来源: Taylor
摘要:
In this paper, kriging analysis was applied in predicting and mapping for the contents of Cu, Cr, and Pb in a sampling area of Beijing's eastern farming regions irrigated with wastewater. Based on the kriging interpolation results, the pollution index maps of soil heavy metals were produced and the assessment of pollution was attempted. The results show that 56% of the surface soil of the sampled site was found to have been slightly polluted. The pollution indices of Cu, Cr and Pb were found to be the highest in the northeastern part of the sampling site, followed by the northern part and the southern part in descending order. The variations in pollution may be on account of specific distribution of wastewater outlets and also due to periodical utilization of contaminated sludge in the vegetable garden. Under these circumstances, the crops of the area were yet not substantially affected by these soil pollutants. It appears that immediate soil treatment or any remedial measures may not be necessary. However, it must be taken into account that a further irrigation with wastewater, especially increased utilization of contaminated sludge, could lead to greater accumulation of pollutants in the soil and create health hazards.
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