ACCUMULATION OF SELECTED TRACE METALS IN SOILS OF URBAN RUNOFF SWALE DRAINS1
作者:
Parker J. Wigington,
Clifford W. Randall,
Thomas J. Grizzard,
期刊:
JAWRA Journal of the American Water Resources Association
(WILEY Available online 1986)
卷期:
Volume 22,
issue 1
页码: 73-79
ISSN:1093-474X
年代: 1986
DOI:10.1111/j.1752-1688.1986.tb01862.x
出版商: Blackwell Publishing Ltd
关键词: cadmium;zinc;copper;lead;urban stormwater runoff;grassed swale drains
数据来源: WILEY
摘要:
ABSTRACT:Field investigations were conducted at three sites in the Washington, D.C., area to detect the accumulation patterns of the trace metals, cadmium, copper, lead and zinc in the soils of roadside grassed swale drains that had been receiving urban stormwater runoff. Two sites were residential areas and one site was an intensively used highway. The research results seem to indicate that the use of swale drains to control urban stormwater runoff had few harmful effects to fine textured soils with respect to the study metals. With the exception of zinc, typical roadside patterns of decreasing metal concentrations with increasing distance from roads were observed for the upper 5 cm of study soils. Zinc accumulated in residential grassed swales due to leachate from galvanized curverts. Sampling to a depth of 60 cm revealed no evidence of subsurface trace metal enrichment in the study swales. Although the percentage of soil zinc in leachable form was as high as 20 percent of total zinc concentrations, the other study metals had small leachable components. Leachable lead was always less than 1 percent of the total lead.
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