黄河三角洲地区交通干线两侧土壤铅污染状况调查与分析

目的]查明黄河三角洲地区交通干线两侧土壤重金属铅污染水平和空间分布特征。方法]运用样地调查法采集土壤样品，并利用原子吸收分光光度法对黄河三角洲地区路域土壤铅污染状况进行了比较和分析。结果] G205国道和S312省道两侧土壤铅污染主要来自于汽车尾气，并且土壤中铅含量随与公路距离的增大而逐渐降低。距公路干道1～50 m内所采土壤样品的含铅量在32.46～86.04 mg/kg，是该区域土壤铅背景值的1.2～3.3倍，污染状况较为明显。经进一步研究，道路两侧绿化带可有效降低土壤铅污染水平。结论]该研究为查明黄河三角洲地区交通干线两侧土壤重金属铅污染水平和空间分布特征提供了理论依据和基础资料。

lnvestigation and Analysis of Soil Pb Contamination at Two Sides of Arterial Traffic in Yellow River Delta Area

Objective] This study was conducted to investigate soil heavy metal Pb pol ution level and spatial distribution characteristics at two sides of arterial traffic in Yel ow River delta area. Method] Soil samples were col ected by sample-plot sur-vey method, and soil Pb pol ution condition in road area of Yel ow River delta was determined and analyzed by atomic absorption spectrometry. Result] Pb pol ution at two sides of national road G205 and provincial road S312 was mainly from auto-mobile exhaust, and Pb content in soil decreased with the distance from road in-creasing. Soil samples col ected at points with distances in the range of 1-50 m from truck road of G205 was 32.46-86.04 mg/kg, which was 1.2-3.3 times of soil Pb background value in this area, and the pol ution was more remarkable. Further study showed that green belt aside road could effectively reduce soil Pb pol ution level. Conclusion] This study provides theoretical basis and basic information for in-vestigation of soil heavy metal Pb pol ution level and spatial distribution characteris-tics at two sides of arterial traffic in Yel ow River delta area.