Removal mechanisms of heavy metal pollution from urban runoff in wetlands

doi:10.1007/s11707-012-0301-7

Front Earth Sci

0, Vol.

Issue () : 433-444 https://doi.org/10.1007/s11707-012-0301-7

REVIEW ARTICLE

Removal mechanisms of heavy metal pollution from urban runoff in wetlands

Zhiming ZHANG, Baoshan CUI(

), Xiaoyun FAN

School of Environment, Beijing Normal University; State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing 100875, China

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Abstract

Solid particles, particularly urban surface dust in urban environments contain large quantities of pollutants. It is considered that urban surface dust is a major pollution source of urban stormwater runoff. The stormwater runoff washes away urban surface dust and dissolves pollutants adsorbed onto the dust and finally discharges into receiving water bodies. The quality of receiving water bodies can be deteriorated by the dust and pollutants in it. Polluted waters can be purified by wetlands with various physical, chemical, and biologic processes. These processes have been employed to treat pollutants in urban stormwater runoff for many years because purification of treatment wetlands is a natural process and a low-cost method. In this paper, we reviewed the processes involved during pollutants transport in urban environments. Particularly, when the urban stormwater runoff enters into wetlands, their removal mechanisms involving various physical, chemical and biologic processes should been understood. Wetlands can remove heavy metals by absorbing and binding them and make them form a part of sediment. However, heavy metals can be released into water when the conditions changed. This information is important for the use of wetlands for removing of pollutants and reusing stormwater.

Keywords wetlands heavy metal stormwater runoff removal mechanisms

Corresponding Author(s): CUI Baoshan,Email:cuibs@bnu.edu.cn, cuibs67@yahoo.com

Issue Date: 05 December 2012

Cite this article:

Baoshan CUI,Xiaoyun FAN,Zhiming ZHANG. Removal mechanisms of heavy metal pollution from urban runoff in wetlands[J]. Front Earth Sci, 0, (): 433-444.

URL:

https://academic.hep.com.cn/fesci/EN/10.1007/s11707-012-0301-7
https://academic.hep.com.cn/fesci/EN/Y0/V/I/433

Fig.1 Flow diagram illustrating the processes involved during pollutants transport in urban environments

Tab.1 Mean concentrations of heavy metals in urban surface dust

Tab.2 Heavy metals mean values of EMCs in runoff water

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