兰州市天水路和南滨河路交通干道土壤和植物重金属分布特征的分析  

Distribution characteristics of heavy metals in soil and plants of Tianshui Road and South Riverside Road in Lanzhou City

作　　者：杨颖丽[1] 高晓霞[1] 李琼[1] 李翠祥[1] 殷金梅[1] YANG Ying-li GAO Xiao-xia LI Qiong LI Cui-xiang YIN Jin-mei(College of Life Sciences, Northwest Normal University, Lanzhou 730070, Gansu, Chin)

机构地区：[1]西北师范大学生命科学学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2017年第2期75-81,共7页Journal of Northwest Normal University(Natural Science)

基　　金：甘肃省科技支撑计划(144FKCA059)

摘　　要：对兰州市两条交通干道天水路和南滨河路路侧土壤和绿化植物叶片Cr、Pb、Zn、Cu、Mn、Ni、Fe和Ca等元素的分布特征及其潜在的生态风险进行分析.结果表明:(1)天水路路侧土壤重金属Cr、Pb、Zn和Cu的含量明显高于远离交通主干道的大学校园,Mn和Ni的含量无明显差异,土壤重金属污染程度表现为Cu>Pb>Cr,而Zn、Mn和Ni未达到污染水平;(2)南滨河路路侧土壤和对照采样点土壤中均含有高的Cr、Pb和Cu,其中Cr和Pb的1<P_i(污染指数)<2,达到了轻度污染水平,Cu的P_i大于2,达到了中度污染水平,而Zn、Mn和Ni未达到污染水平;(3)南滨河路各路段绿化植物叶片Pb、Zn和Mn的含量明显高于天水路绿化植物的含量.Samples are collected from South Riverside Road and Tianshui Road of Lanzhou City, and distribution characteristics and potential ecological risk of heavy metals and Ca were evaluated. Mn and Ni contents have no significant difference, however, the amount of Cr, Pb, Zn and Cu in roadside soil is higher than that in campus, and the order of contamination degree is Cu〉Pb〉Cr, but Zn, Mn and Ni missed pollution level. The roadside soil of South Riverside Road and the control sampling soil contain higher Cr, Pb and Cu, and the pollution index（Pi） of Cr and Pb is less than 2 but more than 1, reaching the level of light pollution, the Pi of Cu is more than 2, reached a moderate level of pollution, hut Zn, Mn and Ni do not meet pollution levels. Besides, the levels of Pb, Zn and Mn in the greening plant leaves of South Riverside Road were much higher than those in Tianshui Road.

关 键 词：重金属 土壤 植物 交通污染 兰州市 

分 类 号：Q89[生物学]