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DOI	10.1016/j.atmosenv.2019.117099
	Chemical nature of zinc in size fractionated particulate matter from residual oil combustion - A comparative study
	Pattanaik S.; Huggins F.E.
发表日期	2020
ISSN	1352-2310
卷号	221
英文摘要	Although zinc is ubiquitous in ambient particulate matter (PM), exposure to size fractionated residual oil fly ash (ROFA) PM is of particular concern due to several studies implicating particle zinc in mortality, adverse respiratory and cardiac effects. The lack of zinc speciation data is an impediment to our understanding of the biological mechanism of Zn induced toxicity. ROFA PM2.5+ samples (i.e. particle with aerodynamic diameter >2.5 μm) are prepared in a small 732 kW practical fire tube boiler by combusting one No. 5 and three No. 6 residual oil(s) of varying sulfur and ash contents. The combined X-ray absorption spectroscopy and selective extraction method is used to determine the Zn speciation in PM2.5+ samples. The Zn speciation in ROFA PM2.5 (i.e. particle with aerodynamic diameter <2.5 μm) samples, reported earlier, is included here for comparison purposes. The data show that zinc sulfate is predominant in both fractions. In addition, an appreciable amount of zinc phosphate was detected in the PM2.5 fraction. The insoluble zinc forms in both the fractions are identified as Zn-sorbed-ferrihydrite and zinc sulphide. The variation of Zn speciation across different size fractions has implication on the bioavailability and toxicity of Zn. Such source specific speciation data are needed for developing source inventories, and for amending existing regulations/framing new regulations for different size fractions. © 2019 Elsevier Ltd
关键词	Coarse particulate matter Fine particulate matter Residual oil combustion Solubility X-ray absorption spectroscopy Zinc speciation
语种	英语
scopus关键词	Aerodynamics; Biochemistry; Combustion; Extraction; Fly ash; Particles (particulate matter); Solubility; Sulfur compounds; Toxicity; X ray absorption spectroscopy; Zinc sulfide; Aerodynamic diameters; Ambient particulate Matter; Biological mechanisms; Coarse particulate matter; Fine particulate matter; Residual oil; Selective extraction; Zinc speciation; Zinc metallography; ferric hydroxide; sulfur; zinc; zinc phosphate; zinc sulfate; ambient air; chemical analysis; combustion; comparative study; fly ash; fractionation; induced response; mortality; particulate matter; solubility; speciation (chemistry); X-ray spectroscopy; zinc; Article; ash; combustion; comparative study; extended X ray absorption fine structure spectroscopy; particulate matter; priority journal; X ray absorption spectroscopy
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/249484
作者单位	Applied Physics, Ballistics Department, F. M. University, Balasore, 756 019, India; CFFS/CMS, University of Kentucky, Lexington, KY 40506, United States
推荐引用方式 GB/T 7714	Pattanaik S.,Huggins F.E.. Chemical nature of zinc in size fractionated particulate matter from residual oil combustion - A comparative study[J],2020,221.
APA	Pattanaik S.,&Huggins F.E..(2020).Chemical nature of zinc in size fractionated particulate matter from residual oil combustion - A comparative study.ATMOSPHERIC ENVIRONMENT,221.
MLA	Pattanaik S.,et al."Chemical nature of zinc in size fractionated particulate matter from residual oil combustion - A comparative study".ATMOSPHERIC ENVIRONMENT 221(2020).