调查粉尘扰民投诉:利用综合微分析技术将高频粉尘沉积记录和来源识别结合起来

IF 3.9 3区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Kathryn L. Linge , Kari Pitts , Silvia Black , Angela Downey , Mark Brand , Peter Taylor , Colin Priddis
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引用次数: 0

摘要

虽然工业中的管道粉尘排放通常受到良好的监管和控制,但逃逸性粉尘排放可能难以量化或与场外排放区分开来,特别是在逃逸性排放是瞬时或间歇性的情况下。在这项研究中,我们采用一种新颖的粉尘沉积取样方法对有害粉尘的来源进行了调查,随后使用光学显微镜、X 射线衍射 (XRD)、扫描电子显微镜与能量色散 X 射线光谱法 (SEM-EDS) 和同位素比质谱分析法进行了化学和矿物学分析。在相关区域的 6 个地点,在水平方向的 300 毫米正方形玻璃板上收集了 24 小时内的粉尘沉积情况。这种方法可以捕获极小质量(10 毫克)的粉尘,并能区分不同地点和不同日期粉尘沉积的极小变化。利用 XRD 矿物学、光学显微镜的视觉外观和对单个颗粒的 SEM-EDS 分析,对从附近石灰制造厂的潜在粉尘源和该地区的其他潜在逃逸性粉尘源收集的对比样本进行了区分。将选定的粉尘样本与参考样本进行比较后发现,研究地点的大部分粉尘沉积物都是土壤或沙子。不过,有两个地点的灰尘沉积物有时由一种成分类似于石灰的物质组成,这种石灰已经重新水化成波长石,但尚未完全碳化成方解石。随后对这两个地点的部分粉尘样本进行了 δ13C 和 δ18O 分析,结果表明小颗粒在碱性环境中迅速碳化,这可能发生在石灰的大气释放和运输过程中,并排除了现场石灰堆放产生的逃逸性粉尘排放。将从粉尘沉积的高频记录中获得的信息与有针对性的矿物学、同位素和形态学检查相结合,为了解该地区逃逸性粉尘排放的来源提供了新的视角。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigating nuisance dust complaints: Combining high frequency dust deposition records and source identification using integrated microanalytical techniques

While ducted dust emissions from industry are usually well regulated and controlled, fugitive dust emissions can be difficult to quantify or differentiate from off-site emissions, particularly where fugitive emissions are transient or intermittent. In this study, sources of nuisance dust were investigated using a novel dust deposition sampling methodology, followed by chemical and mineralogical analysis using optical microscopy, x-ray diffraction (XRD), scanning electron microscopy with energy dispersive x-ray spectrometry (SEM-EDS), and isotope ratio mass spectrometry analysis. Dust deposition over 24 h was collected on horizontally orientated 300 mm square glass panels at 6 sites in the region of interest. This method captured very small (<10 mg) masses of dust and could distinguish very small variations in dust deposition at different sites and on different days. Comparison samples collected from potential dust sources at a nearby lime manufacturing facility, and other potential fugitive dust sources in the region were differentiated using XRD mineralogy, visual appearance by optical microscopy and SEM-EDS analysis of individual particles. Comparison of selected dust samples to reference samples indicated most dust deposition at the study sites consisted of soil or sand. However, dust deposition at two sites was sometimes composed of a material that was similar in composition to lime that had been rehydrated to portlandite, but not yet fully carbonated to calcite. Subsequent analysis of δ13C and δ18O for selected dust samples from these two sites were consistent with rapid and recent carbonation of small particles in an alkaline environment, which could have occurred during the atmospheric release and transport of lime, and ruled out fugitive dust emission from lime stockpiles existing on site. Combining the information obtained from high frequency record of dust deposition with targeted mineralogical, isotopic and morphological examinations provided new insight into the source of fugitive dust emissions in this area.

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来源期刊
Atmospheric Pollution Research
Atmospheric Pollution Research ENVIRONMENTAL SCIENCES-
CiteScore
8.30
自引率
6.70%
发文量
256
审稿时长
36 days
期刊介绍: Atmospheric Pollution Research (APR) is an international journal designed for the publication of articles on air pollution. Papers should present novel experimental results, theory and modeling of air pollution on local, regional, or global scales. Areas covered are research on inorganic, organic, and persistent organic air pollutants, air quality monitoring, air quality management, atmospheric dispersion and transport, air-surface (soil, water, and vegetation) exchange of pollutants, dry and wet deposition, indoor air quality, exposure assessment, health effects, satellite measurements, natural emissions, atmospheric chemistry, greenhouse gases, and effects on climate change.
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