Title

Fate Of Heavy Metals In Stormwater Management Systems

Abstract

The State of Florida requires that stormwater originating within a new project or development be managed and treated within the boundaries of the development to protect surface waters. Retention and exfiltration systems are the most common management practices. Theoretically these provide complete removal efficiency up to the design capacity since none of the stormwater reaches the receiving water body by direct inflow. The fate of various pollutants once entering these systems is not known, particularly whether heavy metals remain in them locked tightly by a chemical or physical association or slowly disperse outward over a much larger area to other water bodies. Investigations on an 8-year-old stormwater retention facility (1.5 ha) in Orlando, Fla., to define movement of heavy metals into and out of the basin seek to answer these questions. Stormwater runoff has been collected and analyzed from the input pipe for approximately 1 year. In addition, both wet and dry bulk precipitation are being collected to estimate the relative significance of each input source. Forty-five separate 3 cm core samples were collected from within the pond, divided into four sections and analyzed for zinc, cadmium, copper, aluminum, iron, lead, nickel, chromium, and phosphorus as well as moisture and organic contents. Movements of heavy metals from the inlet were estimated using the top 1 cm values. While zinc and lead were removed rapidly from solution near the outfall, other metals such as copper and aluminum were mobile. Deposition of metals correlated highly with the chemical speciation of the metal at the time of input. The role of plants in trapping and removing heavy metals is also under investigation. Although a large portion of the metals seem to remain within the basin, a certain fraction may leave the pond through percolation and groundwater movement. Five multilevel wells installed from the edge of the pond outward monitor downward or horizontal movement. Groundwater monitoring will continue throughout the typically wet summer season. © 1984 Taylor & Francis Group, LLC.

Publication Date

1-1-1984

Publication Title

Lake and Reservoir Management

Volume

1

Issue

1

Number of Pages

329-334

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1080/07438148409354534

Socpus ID

84934102522 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84934102522

This document is currently not available here.

Share

COinS