唐山地区湿地景观污染后土壤垂直分布特征变化分析

Pollution Soil Characteristics of Vertical Distribution Analysis in Tangshan Area Wetland Landscape

研究了唐山市南湖湿地公园内4个采集点中土壤剖面样品中重金属元素的垂直分布特征,对当地环境污染程度较重的4种重金属汞、砷、铅、铬进行了重点分析。采用RCB顺序提取法对这4种重金属元素的形态分布进行了研究。结果表明:As、Pb、Hg这三种重金属元素的含量都随着土层深度的增加而减少,Cr含量随着土壤深度的增加,呈现出先增加后减少的趋势;相关性研究结果表明,在土壤中存在着Cr与As两种重金属元素的自然污染源,或者出现过人为性的污染行为;形态分析结果表明:Pb和Cr的可交换态的含量要比其它两种重金属元素高。

To study the tangshan south lake wetland park in 4 to collect the vertical distribution characteristics of heavy metal elements in soil profile sample, to the local environment pollution degree of heavy four kinds of heavy metal mercury, arsenic, lead, chromium are analyzed in focus. Use RCB sequential extraction of these 4 kinds of the formation distribution of heavy metals were studied. The results showed that the As, Pb, Hg, the three kinds of heavy metal element content were increased with the increase of soil depth, Cr content increased with the increase of soil depth, and presents the first increase after the decrease trend; Correlation research results show that the soil Cr and As two kinds of heavy metals exist in natural sources, or been artificially pollution behavior; The morphological analysis results show that the Pb and Cr content of exchangeable states is higher than the other two kinds of heavy metal elements.