Effects of Road Dust Suppressants on PM Levels in a Mediterranean Urban Area

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• 作者：Fulvio Amato ; Angeliki Karanasiou ; Patricia Cordoba ; Andr茅s Alastuey ; Teresa Moreno ; Franco Lucarelli ; Silvia Nava ; Giulia Calzolai ; Xavier Querol
• 刊名：Environmental Science & Technology
• 出版年：2014
• 出版时间：July 15, 2014
• 年：2014
• 卷：48
• 期：14
• 页码：8069-8077
• 全文大小：413K
• ISSN：1520-5851

文摘

The abatement of road dust emissions is currently a major challenge for sustainable transportation, causing exceedances of limits on particulate matter (PM) and high population exposures to mineral dust and metals. Mitigation measures have been proposed such as improved street cleaning and the use of dust suppressants. This study evaluated, for the first time, the effectiveness of calcium鈥搈agnesium acetate (CMA) and MgCl₂ in reducing road dust emissions in a Mediterranean city. During a two-month campaign, a typical urban road in the city of Barcelona was sprayed, and changes in PM_x levels and components were monitored at four traffic sites and one background monitoring sites. The integrated results indicate no statistically significant effectiveness of dust suppressants on PM₁₀ and PM_2.5鈥?0 levels. Episodic reductions of Al, K, Mg, Cr, Li, Cu, and Zn were observed during CMA applications, but they were not systematically statistically significant over different stations and spreading days. MgCl₂ days showed lower PM₁₀ mean concentrations, but these reductions were not statistically significant and were not supported by significant drops in mineral and brake-wear metals. Based on our literature review, it can be postulated that the higher the road dust loading, the higher the dust suppressant effectiveness.