Title

Potential Contamination Of Groundwater From Cu, Pb, And Zn In Wet Detention Ponds Receiving Highway Runoff

Title - Alternative

J. Environ. Sci. Health Part A-Environ. Sci. Eng. Toxic Hazard. Subst. Control

Keywords

Highway Runoff; Detention Ponds; Sediment Accumulation; Metal Transport; Modeling; Groundwater Contamination; Engineering, Environmental; Environmental Sciences

Abstract

Heavy metals (Cu, Pb, Zn) in highway runoff entering detention ponds are removed by physical, chemical, and biological processes, and concentrate in the bottom sediments. Soluble metal fractions percolate into the bottom sediments and produce a potential for contamination of groundwater. Therefore, a two-year research project was supported by Florida Department of Transportation (FDOT) and Federal Highway Administration (FHWA) to study the fate and migration of those metals in bottom sediments of six wet detention ponds, located in Florida. Sorption, molecular dispersion, and pilot studies were conducted in the laboratory to investigate metal transport through the sediment cores collected from these ponds. The results showed that the flow of metals through the bottom sediments is a very slow process. Most of these metals are retained in the top 15-20 cm of sediments and saturation of this layer may take years. Removal of accumulated bottom sediments at time intervals averaging 25 years would be sufficient to minimize the potential contamination of groundwater. Also existing models were modified to simulate metal transport through the bottom sediments in wet detention ponds.

Publication Title

Journal of Environmental Science and Health Part a-Environmental Science and Engineering & Toxic and Hazardous Substance Control

Volume

A27

Issue/Number

4

Publication Date

1-1-1992

Document Type

Article

Language

English

First Page

1033

Last Page

1044

WOS Identifier

WOS:A1992HT61800007

ISSN

1077-1204

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