Trace Metals in Fugitive Dust from Unsurfaced Roads in the Viburnum Trend Resource Mining District of Missouri--Implementation of a Direct-Suspension Sampling Methodology

Abstract

Fugitive dust from 18 unsurfaced roadways in Missouri were sampled using a novel cyclonic fugitive dust collector that was designed to obtain suspended bulk samples for analysis. The samples were analyzed for trace metals, Fe and Al, particle sizes, and mineralogy to characterize the similarities and differences between roadways. Thirteen roads were located in the Viburnum Trend (VT) mining district, where there has been a history of contaminant metal loading of local soils; while the remaining five roads were located southwest of the VT district in a similar rural setting, but without any mining or industrial process that might contribute to trace metal enrichment. Comparison of these two groups shows that trace metal concentration is higher for dusts collected in the VT district. Lead is the dominant trace metal found in VT district dusts representing on average 79% of the total trace metal concentration, and was found moderately to strongly enriched relative to unsurfaced roads in the non-VT area. Fugitive road dust concentrations calculated for the VT area substantially exceed the 2008 Federal ambient air standard of 0.15μgm-3 for Pb. The pattern of trace metal contamination in fugitive dust from VT district roads is similar to trace metal concentrations patterns observed for soils measured more than 40 years ago indicating that Pb contamination in the region is persistent as a long-term soil contaminant.

Department(s)

Geosciences and Geological and Petroleum Engineering

Second Department

Chemistry

Keywords and Phrases

Contaminated dusts; Fugitive road dust; Missouri lead belt; Sampling technology; Unsurfaced roads; Viburnum Trend Pb contamination; Industrial processs; Missouris; Pb contamination; Road dusts; Trace metal concentration; Trace metal contaminations; Trace metal enrichments; Soil pollution; aluminum; cadmium; cobalt; copper; iron; lead; nickel; zinc; Missouri; United States; Viburnum Trend

International Standard Serial Number (ISSN)

0045-6535

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2013 Elsevier, All rights reserved.

Publication Date

01 Sep 2013

Link to Full Text

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