烟台东部高新技术海洋经济新区地表土壤重金属污染评价

Evaluation on Heavy Metal Pollution of Surface Soil in Hightech Marine Economic Zone in Eastern Yantai

摘要:

近年来，随着烟台东部高新技术海洋经济新区的快速发展，城市地表土壤重金属污染状况愈渐严重，以烟台东部高新技术海洋经济新区范围作为研究区，在地表深度1m以内的表土(0～20cm)和心土(20～40cm)，取土壤样205件进行分析测试，采用单项污染指数法和内梅罗综合污染指数法，对研究区进行了地表土壤重金属污染评价，7种重金属元素单项污染程度依次为Pb>Cu>Cd>Hg>Cr>Ni>As；根据内梅罗综合污染指数法评价研究区土壤环境质量，认为整体较好，大部分属于清洁区和尚清洁区；区内地表土壤重金属污染主要分布于芝罘区、莱山区西北以及解甲庄镇西南工业集中地区，其中Pb，Cu，Cd，Hg 4种元素为造成研究区地表土壤重金属元素污染的主要污染元素，Ni，Cr为造成区内地表重金属污染的次要因素，As未发现污染，与重金属元素单项污染程度相呼应。

Abstract:

In recent years，with the rapid development of Hightech marine economic zone in eastern Yantai, heavy metal pollution of urban surface soil is getting worse. 205 samples have chosen from topsoil(0~20cm) and subsoil(20~40cm) in the study area in hightech marine economic zone in eastern Yantai.The pollution of heavy metals in the surface soil in study area has been evaluated by using the single pollution index method and Nemerow pollution index method. The degree of soil pollution of seven kinds of heavy metals has been evaluated with the single pollution index method. The result is Pb>Cu>Cd>Hg>Cr>Ni>As. By using Nemerow pollution index method，the soil environmental quality of the study area is evaluated. It is regarded that the environment is generally good，most of the areas belong to clean zone and proximity clean zone. The area of soil heavy metal pollution mainly distributed in Zhifu area，Laishan area in the northwest and southwest of the town of Xiejiazhuang industrial concentration area. Four elements of Pb, Cu, Cd, Hg are main factors which will cause heavy metal pollution in topsoil; Ni and Cr are minor elements; while As are found no pollution which will be corresponding with individual pollution level of heavy metal pollution.