城市道路灰尘中重金属和多环芳烃污染特征研究  

Pollution characteristics of heavy metals and PAHs in urban road dust

作　　者：陈秀端 卢新卫 CHEN Xiuduan;LU Xinwei(School of Economics and Management,Shaanxi Xueqian Normal University,Xi’an 710100,China;School of Geography and Tourism,Shaanxi Normal University,Xi’an 710119,China)

机构地区：[1]陕西学前师范学院经济与管理学院,陕西西安710100 [2]陕西师范大学地理与旅游学院,陕西西安710019

出　　处：《环境保护科学》2021年第2期161-166,共6页Environmental Protection Science

基　　金：国家自然科学基金资助项目(41271510);陕西省自然科学基础研究计划资助项目(2018JQ4038)。

摘　　要：以中国城市道路灰尘重金属和多环芳烃研究为基础,文章评价了不同城市这两类污染物的污染特征。研究表明,城市道路灰尘中As、Cu、Cr、Pb、Zn、Fe、Cd和Hg的累积严重,各城市道路灰尘重金属的污染负荷指数(PLI)均高于1,已受到轻、中度甚至重度重金属污染。高环多环芳烃(PAHs)是城市道路灰尘PAHs的主要组成部分;不同城市PAHs的结构存在差异;城市道路灰尘中苯并(a)芘、二苯并(a,h)蒽对毒性当量浓度总值的贡献率最高,二者总和达到77.97%,高环PAHs的生态风险可能更高。城市道路灰尘的无机污染和有机污染均应引起关注以避免可能的生态风险和人群健康风险。Based on the research of heavy metals and PAHs pollution in the road dust of some cities in China,the pollution characteristics of the pollutants were evaluated.The results showed that As,Cu,Cr,Pb,Zn,Fe,Cd,Hg were seriously accumulated in urban road dust.The PLI of heavy metals in urban road dust was higher than 1,thus indicating these cities were slightly,moderately or even heavily polluted.High ring PAHs were the main components of PAHs in urban road dust.The structure of PAHs in different cities was different.The contribution rate of benzo(a)pyrene and dibenzo(a,h)anthracene to the total value of the toxic equivalent concentration was the highest.The sum was 77.97%.The ecological risk of the high ring PAHs might be higher.Both inorganic pollution and organic pollution of the urban road dust should be concerned to avoid possible ecological risks and human health risks.

关 键 词：城市道路灰尘 重金属 多环芳烃 污染特征 

分 类 号：X53[环境科学与工程—环境工程]