کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4425227 1309098 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The internal microstructure and fibrous mineralogy of fly ash from coal-burning power stations
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
The internal microstructure and fibrous mineralogy of fly ash from coal-burning power stations
چکیده انگلیسی

Coal fly ash (CFA) is a significant environmental pollutant that presents a respiratory hazard when airborne. Although previous studies have identified the mineral components of CFA, there is a paucity of information on the structural habits of these minerals. Samples from UK, Polish and Chinese power stations were studied to further our understanding of the factors that affect CFA geochemistry and mineralogy. ICP-MS, FE-SEM/EDX, XRD, and laser diffraction were used to study physicochemical characteristics. Analysis revealed important differences in the elemental compositions and particle size distributions of samples between sites. Microscopy of HF acid-etched CFA revealed the mullite present possesses a fibrous habit; fibres ranged in length between 1 and 10 μm. Respirable particles (<10 μm) were frequently observed to contain fibrous mullite. We propose that the biopersistence of these refractory fibres in the lung environment could be contributing towards chronic lung diseases seen in communities and individuals continually exposed to high levels of CFA.


► Chinese CFA had a greater crystalline mineral content and smaller particle size.
► Mullite and quartz, two hazardous minerals, recrystallise from glass melt particles.
► Mullite revealed a fibrous habit, with fibres 1–10 μm in length and 0.5–1 μm in width.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 159, Issue 12, December 2011, Pages 3324–3333
نویسندگان
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