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Article: Quartz in ash, and air in a high lung cancer incidence area in China

TitleQuartz in ash, and air in a high lung cancer incidence area in China
Authors
KeywordsHousehold air pollution
Lung cancer
Quartz
Solid fuels
Issue Date2017
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/envpol
Citation
Environmental Pollution, 2017, v. 221, p. 318-325 How to Cite?
AbstractExposure to crystalline silica (quartz) has been implicated as a potential cause of the high lung cancer rates in the neighbouring counties of Xuanwei and Fuyuan, China, where the domestic combustion of locally sourced 'smoky' coal (a bituminous coal) is responsible for some of the highest lung cancer rates in the nation, irrespective of gender or smoking status. Previous studies have shown that smoky coal contains approximately twice as much quartz when compared to alternative fuels in the area, although it is unclear how the quartz in coal relates to household air pollution. Samples of ash and fine particulate matter (PM2.5) were collected from 163 households and analysed for quartz content by Fourier transformed infrared spectroscopy (FT-IR). Additionally, air samples from 12 further households, were analysed by scanning electron microscopy (SEM) to evaluate particle structure and silica content. The majority (89%) of household air samples had undetectable quartz levels (<0.2 μg/m3) with no clear differences by fuel-type. SEM analyses indicated that there were higher amounts of silica in the smoke of smoky coal than smokeless coal (0.27 μg/m3 vs. 0.03 μg/m3). We also identified fibre-like particles in a higher concentration within the smoke of smoky coal than smokeless coal (5800 fibres/m3 vs. 550 fibres/m3). Ash analysis suggested that the bulk of the quartz in smoky coal went on to form part of the ash. These findings indicate that the quartz within smoky coal does not become adequately airborne during the combustion process to cause significant lung cancer risk, instead going on to form part of the ash. The identification of fibre-like particles in air samples is an interesting finding, although the clinical relevance of this finding remains unclear.
Persistent Identifierhttp://hdl.handle.net/10722/281190
ISSN
2019 Impact Factor: 6.792
2015 SCImago Journal Rankings: 2.045
PubMed Central ID

 

DC FieldValueLanguage
dc.contributor.authorDownward, GS-
dc.contributor.authorHu, W-
dc.contributor.authorRothman, N-
dc.contributor.authorReiss, B-
dc.contributor.authorTromp, P-
dc.contributor.authorWu, G-
dc.contributor.authorWei, F-
dc.contributor.authorXu, J-
dc.contributor.authorSeow, WJ-
dc.contributor.authorChapman, RS-
dc.contributor.authorLan, Q-
dc.contributor.authorVermeulen, R-
dc.date.accessioned2020-03-09T09:51:22Z-
dc.date.available2020-03-09T09:51:22Z-
dc.date.issued2017-
dc.identifier.citationEnvironmental Pollution, 2017, v. 221, p. 318-325-
dc.identifier.issn0269-7491-
dc.identifier.urihttp://hdl.handle.net/10722/281190-
dc.description.abstractExposure to crystalline silica (quartz) has been implicated as a potential cause of the high lung cancer rates in the neighbouring counties of Xuanwei and Fuyuan, China, where the domestic combustion of locally sourced 'smoky' coal (a bituminous coal) is responsible for some of the highest lung cancer rates in the nation, irrespective of gender or smoking status. Previous studies have shown that smoky coal contains approximately twice as much quartz when compared to alternative fuels in the area, although it is unclear how the quartz in coal relates to household air pollution. Samples of ash and fine particulate matter (PM2.5) were collected from 163 households and analysed for quartz content by Fourier transformed infrared spectroscopy (FT-IR). Additionally, air samples from 12 further households, were analysed by scanning electron microscopy (SEM) to evaluate particle structure and silica content. The majority (89%) of household air samples had undetectable quartz levels (<0.2 μg/m3) with no clear differences by fuel-type. SEM analyses indicated that there were higher amounts of silica in the smoke of smoky coal than smokeless coal (0.27 μg/m3 vs. 0.03 μg/m3). We also identified fibre-like particles in a higher concentration within the smoke of smoky coal than smokeless coal (5800 fibres/m3 vs. 550 fibres/m3). Ash analysis suggested that the bulk of the quartz in smoky coal went on to form part of the ash. These findings indicate that the quartz within smoky coal does not become adequately airborne during the combustion process to cause significant lung cancer risk, instead going on to form part of the ash. The identification of fibre-like particles in air samples is an interesting finding, although the clinical relevance of this finding remains unclear.-
dc.languageeng-
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/envpol-
dc.relation.ispartofEnvironmental Pollution-
dc.subjectHousehold air pollution-
dc.subjectLung cancer-
dc.subjectQuartz-
dc.subjectSolid fuels-
dc.titleQuartz in ash, and air in a high lung cancer incidence area in China-
dc.typeArticle-
dc.identifier.emailXu, J: xusunjun@hku.hk-
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1016/j.envpol.2016.11.081-
dc.identifier.pmid27939206-
dc.identifier.pmcidPMC5219947-
dc.identifier.scopuseid_2-s2.0-85008176637-
dc.identifier.hkuros309323-
dc.identifier.volume221-
dc.identifier.spage318-
dc.identifier.epage325-
dc.publisher.placeUnited Kingdom-

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