小型城市集水区内重金属的迁移

The transport of heavy metals within a small urban catchment.

作者信息

Revitt D M, Hamilton R S, Warren R S

机构信息

Urban Pollution Research Centre, Middlesex Polytechnic, Queensway, Enfield, UK.

出版信息

Sci Total Environ. 1990 Apr;93:359-73. doi: 10.1016/0048-9697(90)90127-g.

DOI:10.1016/0048-9697(90)90127-g

PMID:2360019

Abstract

A small urban catchment has been monitored for levels of Pb, Zn, Cd and Cu in the atmosphere, deposition, surface dust and stormwater runoff. The contribution of local emissions to total deposition is considered and found to be significant only for Zn. In rainfall, the metals are mainly particulate associated. Wet deposition is more important than dry deposition for Pb and Zn but the processes are comparable for Cd and Cu. The percentage of the dissolved metal level in rainfall which was observed in the storm runoff varied from 92% for Cu to 13% for Pb. A predictive model for metal concentration in runoff is presented and the results obtained for three monitored storms are assessed.

摘要

对一个小型城市集水区的大气、沉积物、地表灰尘和雨水径流中的铅、锌、镉和铜含量进行了监测。研究了本地排放对总沉积物的贡献，发现仅锌的贡献显著。在降雨中，金属主要与颗粒物相关。对于铅和锌，湿沉降比干沉降更重要，但镉和铜的干湿沉降过程相当。在暴雨径流中观察到的降雨中溶解金属水平的百分比，铜为92%，铅为13%。提出了径流中金属浓度的预测模型，并评估了三次监测暴雨的结果。