城市路面径流重金属排放规律及初期效应研究  

DISCHARGE CHARACTERISTICS AND FIRST FLUSH EFFECT OF ROAD RUNOFF IN URBAN

作　　者：王昭[1,2] 李娟[1,2] 李丹萍[1,2] 陈超[1,2] 

机构地区：[1]陕西省土地工程建设集团有限责任公司,西安710075 [2]国土资源部退化及未利用土地整治工程重点实验室,西安710075

出　　处：《环境工程》2017年第6期130-135,共6页Environmental Engineering

基　　金：陕西省重点科技创新团队计划项目(2016KCT-23)

摘　　要：在西安市城市主干道南二环太白立交高架段设置路面径流采样点,采用降雨-产流-产污同步观测的试验方法,对2014年7月—2015年8月的6场降雨径流事件进行采样,监测径流过程中Cu、Pb、Zn、Cr、Ni、Cd的浓度变化,并研究其污染排放规律及初期冲刷效应。结果表明:路面径流污染排放规律与降雨特征及污染物赋存状态密切相关,溶解态重金属浓度均在径流初期达到峰值;颗粒态重金属浓度峰值出现时间略滞后于雨强峰值;重金属总量初期冲刷程度的强弱和溶解态重金属的差异较大,重金属总量初期冲刷程度越强,溶解态重金属反而越弱。Urban road runoff caused by six storm events were collected at South Second Ring Road in Xi＇ an from July 2014 to Aug 2015. Concentrations of Cu, Pb, Zn, Cr, Ni and Cd were tested during the whole processes. Discharge characteristics and first flush effect of road runoff were studied by the test methods of rainfall-produce and runoff-produce pollution with simultaneous observations. The results showed that road runoff pollution was closely related to the rainfall characteristics and occurrence status of pollutants. Whatever the type of rainfall runoff, the rain dissolved heavy metals reached the runoff peak at the beginning. Particle state of heavy metal concentration peak time were slightly behind the rainfall intensity peak time. The strength of the total amount of heavy metals appeared early erosion degree and the difference of dissolved metals was larger, the stronger the degree of total amount of heavy metals in the early flush, the weaker the dissolved metals.

关 键 词：路面径流 重金属 排放规律 M(V)曲线 初期冲刷 

分 类 号：X52[环境科学与工程—环境工程]