Effects of Road Dust Suppressants on PM Levels in a Mediterranean Urban Area
Effects of Road Dust Suppressants on PM Levels in a Mediterranean Urban Area
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DOI：
10.1021/es502496s
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发表时间：
2014-07-15
影响因子：
11.4
通讯作者：
Querol, Xavier
中科院分区：
文献类型：
--
作者：
Amato, Fulvio;Karanasiou, Angeliki;Querol, Xavier
目前，减少道路粉尘排放是可持续运输面临的一项重大挑战，导致颗粒物质（PM）超标，以及人口大量接触矿物粉尘和金属。已提出缓解措施，如改善街道清洁和使用抑尘剂。本研究首次评估了醋酸钙镁（CMA）和氯化镁（MgCl2）在减少地中海城市道路粉尘排放中的有效性。在为期两个月的活动中，在巴塞罗那市的一条典型城市道路上喷洒了PMx，并在四个交通站点和一个背景监测点监测PMx水平和成分的变化。综合结果表明，抑尘剂对PM10和PM2.5-10水平的影响无统计学意义。在CMA应用过程中，观察到Al、K、Mg、Cr、Li、Cu和Zn的阶段性减少，但在不同的站点和传播天数中，它们没有系统的统计学意义。MgCl2天显示PM10平均浓度较低，但这些减少没有统计学意义，也没有矿物和制动磨损金属的显着下降。根据我们的文献综述，可以假设道路粉尘负荷越高，抑尘效果越高。
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 magnesium 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 PMx 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 PM2.5-10 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.