State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
Sci Total Environ. 2016 Apr 15;550:940-949. doi: 10.1016/j.scitotenv.2016.01.195. Epub 2016 Feb 4.
To understand the influence of quarry mining dust on particulate matter, ambient PM2.5 and quarry mining dust source samples were collected in a city near quarry facilities during 2013-2014. Samples were subject to chemical analysis for dust-related species (Al, Si, Ca, Fe, Ti), tracer metals, carbon components and water-soluble ions. Seasonal variations of PM2.5 and its main chemical components were investigated. Distinctive seasonal variations of PM2.5 were observed, with the highest PM2.5 concentrations (112.42μgm(-3)) in fall and lowest concentrations in summer (45.64μgm(-3)). For dust-related species, mass fractions of Si and Al did not show obvious seasonal variations, whereas Ca presented higher fractions in spring and summer and lower fractions in fall and winter. A combined receptor model (PMF-CMB) was applied to quantify the quarry mining dust contribution to PM2.5. Seven sources were identified, including quarry mining dust, soil dust, cement dust, coal combustion vehicles, secondary sulfate and secondary nitrate. On a yearly average basis, the contribution of quarry mining dust to PM2.5 was 6%. The contribution of soil dust to PM2.5 was comparable with cement dust (13% and 13%, respectively). Other identified sources included vehicle, secondary sulfate, secondary nitrate and coal combustion, which contributed 23, 15, 9 and 18% of the total mass, respectively. Air mass residence time (AMRT) analysis showed that northeast and southeast regions might be the major PM2.5 source during the sampling campaign. The findings of this study can be used to understand the characteristics of quarry mining dust and control strategies for PM2.5.
为了了解采石场粉尘对颗粒物的影响，在 2013-2014 年期间，在靠近采石场设施的一个城市中收集了环境 PM2.5 和采石场粉尘源样品。对样品进行了与粉尘相关的物质（Al、Si、Ca、Fe、Ti）、示踪金属、碳成分和水溶性离子的化学分析。研究了 PM2.5 及其主要化学成分的季节性变化。观察到 PM2.5 存在明显的季节性变化，秋季的 PM2.5 浓度最高（112.42μg/m3），夏季的浓度最低（45.64μg/m3）。对于与粉尘相关的物质，Si 和 Al 的质量分数没有明显的季节性变化，而 Ca 在春季和夏季的分数较高，在秋季和冬季的分数较低。应用了一种组合受体模型（PMF-CMB）来量化采石场粉尘对 PM2.5 的贡献。确定了 7 个源，包括采石场粉尘、土壤粉尘、水泥粉尘、燃煤车辆、二次硫酸盐和二次硝酸盐。在年平均水平上，采石场粉尘对 PM2.5 的贡献为 6%。土壤粉尘对 PM2.5 的贡献与水泥粉尘相当（分别为 13%和 13%）。其他确定的源包括车辆、二次硫酸盐、二次硝酸盐和燃煤，它们分别贡献了总质量的 23%、15%、9%和 18%。大气停留时间（AMRT）分析表明，在采样期间，东北和东南地区可能是 PM2.5 的主要来源。本研究的结果可用于了解采石场粉尘的特性和 PM2.5 的控制策略。
Zotero 插件