摘要
本研究以贵州省的贵黄公路作为研究对象,分析道路两侧灰尘、土壤和植物样品中的重金属Cr、Cd、Cu、Zn和Pb的分布特征,判定其可能源,并且通过锌同位素进行初步验证。结果表明,在道路两侧的灰尘和土壤中富集大量重金属,其中重金属锌富集能力最强,重金属元素绝大部份来自汽车的部件如轮胎、刹车片的磨损。使用地积累指数法和潜在生态风险指数法对重金属污染程度和生态环境的风险水平进行评价,发现公路周围环境中重金属元素Cr、Zn、Cu、Cd和Pb均存在一定的风险危害,整体达到低到中等风险水平,其中Cd对环境的危害最高。
In this study,we analyzed concentrations of heavy metal elements Cr,Cd,Cu,Zn and Pb in dust,soil and plant samples collected along the Guihuang Highway,in Guizhou province,China,with a goal to better identify the distribution characteristics and impact of highway emission on the surround environments. Zn isotope composition was also measured to confirm the contributing sources. Our results showed significant enrichments of heavy metals in dust and soils along the highway,and main sources of these heavy metals is the wear of tires and brake pads. Geoaccumulation index and potential ecological risk index methods were employed to evaluate the degree of heavy metal pollution and the risk level of environmental ecologic impact. Amongst these investigated heavy metals,Zn was the element with the highest enrichment. All metals Cr,Zn,Cu,Cd and Pb had certain risks and displayed harms to the environment,reaching medium or low risk level,while Cd would possess the highest threat to the environment.
作者
何本蜻
王中伟
张婷
刘剑峰
刘玉龙
梁钟璇
陶发祥
刘晓静
陈玖斌
HE Benqing;WANG Zhongwei;ZHANG Ting;LIU Jianfeng;LIU Yulong;LIANG Zhongxuan;TAO Faxiang;LIU Xiaojing;CHEN Jiubin(State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China;University of Chinese Academy of Sciences,Beiing 100049,China;Institute ofSurface-Earth System Science,Tianjin university,Tianjin 300072,China;Environmental Engineering Assessment Center of Guizhou Province,Guiyang 550002,China)
出处
《地球与环境》
CAS
CSCD
北大核心
2021年第2期164-171,共8页
Earth and Environment
基金
国家重点研发计划(2019YFC1804400)
国家自然科学基金(U1612442、41625012)。
关键词
重金属
公路
分布特征
锌同位素
环境生态风险
heavy metal
highway
distribution pattern
zinc isotopes
environmental ecological risk
