浙江农业学报

• 环境科学 • 上一篇    下一篇

晋南烟区土壤重金属含量空间分布及风险评价

  

  1. (河南农业大学 烟草学院 国家烟草栽培生理生化研究基地,河南 郑州 450002)
  • 出版日期:2015-03-25 发布日期:2015-03-31

Pollution assessment and spatial distribution of soil heavy metals in the tobacco production area in southern Shanxi

  1. (Institute of Tobacco, Henan Agricultural University / National Tobacco Cultivation Physiology and Biochemistry Research Center, Zhengzhou 450002, China)
  • Online:2015-03-25 Published:2015-03-31

摘要: 于2012—2013年在山西晋南烟区平陆县取耕层土样,共布设68个取样点,测定其表层土壤Cd,Pb,Hg,As含量。利用地统计学半方差函数和克里格插值法,结合GIS技术,研究土壤中Cd,Pb,Hg,As的空间分布特征,旨在为清洁烟区的划分提供理论依据。结果显示,研究区土壤中上述4种重金属含量均表现出中等程度的空间相关性,Hg元素在西部地区含量较高,Cd元素在东部地区含量较高,Pb,As在整个植烟区含量均较低。污染评价结果表明,植烟区土壤重金属潜在生态危害等级为Ⅱ级,属中等危害程度。各元素中,以Hg对当地土壤环境质量影响最为严重。

关键词: 土壤, 重金属, GIS, 空间分布, 风险评价

Abstract: Sixty\|eight surficial soil samples were collected from the tobacco\|planting area in Pinglu County in southern Shanxi during 2012 to 2013, and Cd, Pb, Hg, As contents in these samples were analyzed. The spatial distribution of these heavy metals was studied by Geostatistics and GIS techniques to provide theoretical basis for division of cleaning tobacco\|producing areas. It was shown that the contents of these 4 heavy metals in soils were moderately spatial\|correlated. The contents of Hg and Cd were higher in the western and eastern regions, respectively. The contents of Pb and As were relatively low in the study area. The potential ecological hazard grade of heavy metals in the study area was class Ⅱ (medium hazard degree). Among all these 4 heavy metals, the influence of Hg on local soil environment quality was the most serious.

Key words: soil, heavy metals, GIS, spatial distribution, pollution assessment