交通环境与城市行道树重金属铅和镉的关系

以南方常见的18种受到机动车污染的城市行道树及其对照树作为研究材料，用原子吸收分光光度法分析了其叶片和树皮的重金属含量以研究交通环境与城市行道树叶片的树皮含铅量及含镉量之间的关系。研究表明，不同的城市行道树吸收交通环境中重金属的量不同。城市行道树采样部位离杨车道水平距离越近，其树皮和叶片的含铅量和含镉量越高。

Relationship Between Traffic Environment and Heavy Metal, Lead and Cadmium Contents of Roadside Trees in Urban

city roadside trees polluted by the traffic of motor vehicles and the controls,which grow in South China usually,were used for research materials.The contents of lead(Pb),cadmium(Cd)in leaf and bark of the 18 city roadside trees and the control were measured by the method of atomic absorption spectrophotometry to reveal the relationship between traffic environment and heavy metals,lead and cadmium.The result indicates that the amount of lead and cadmium in leaf and bark of city roadside trees varies with the different roadside trees.The higher the contents of lead and cadmium is,the nearer the horizontal distance from the roadway is.