气候变化领域集成服务门户(CCPortal): Isotope signatures of atmospheric mercury emitted from residential coal combustion

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DOI	10.1016/j.atmosenv.2020.118175
	Isotope signatures of atmospheric mercury emitted from residential coal combustion
	Li X.; Li Z.; Chen J.; Zhang L.; Yin R.; Sun G.; Meng B.; Cui Z.; Feng X.
发表日期	2021
ISSN	1352-2310
卷号	246
英文摘要	Residential coal combustion (RCC) is a major source of atmospheric mercury (Hg) in rural areas of China, but little is known about the isotope signatures of Hg from this source. In the present study, the isotope compositions of speciated Hg (Hg0, Hg2+, and Hgp) in flue gas emitted from RCC were investigated in two important coal-producing areas (Xingren (XR) and Jinsha (JS)) of Guizhou Province, Southwest China. The total Hg concentration in discharged flue gas is in the range of 1.80–9.65 μg/m3 at the two sites, and the emission ratio reaches 99.87%. Isotope signatures of total Hg in flue gas are similar to those of Hg in feed coal, with near-zero Δ199Hg and negative δ202Hg (−1.47‰ for XR and −3.00‰ for JS) in discharged flue gas. Such isotope signatures are very different from those of Hg emissions from modern coal-fired power plants with much higher δ202Hg signals. Negative shifts from Hg0 to Hg2+ in flue gas for δ202Hg (−0.94‰) and Δ199Hg (−0.51‰) were observed, suggesting that both mass-dependent fractionation and mass-independent fractionation occurred during RCC. The nuclear volume effect produced by chlorine oxidation of Hg0 to Hg2+ may play an important role in the observed mass-independent fractionation in Hg2+. Without any air pollution control devices, RCC potentially increases the atmospheric Hg levels and has a negative-shifting impact on the δ202Hg of atmospheric Hg. © 2020 Elsevier Ltd
关键词	Atmospheric emissions Geochemical tracer Isotope fractionation Mercury isotopes Residential stove
语种	英语
scopus关键词	Air pollution control; Air pollution control equipment; Coal; Flue gases; Flues; Fossil fuel power plants; Gases; Housing; Isotopes; Mercury (metal); Air pollution control devices; Atmospheric mercury; Chlorine oxidation; Coal-fired power plant; Isotope compositions; Isotope signatures; Mass-independent fractionation; Residential coal combustions; Coal combustion; chlorine; deionized water; isotope; mercury; atmospheric pollution; coal combustion; concentration (composition); isotopic analysis; mercury (element); residential location; air pollution control; air sampling; ambient air; Article; atmosphere; atomic absorption spectrometry; China; coal power; combustion; controlled study; electric power plant; evaporation; flue gas; fractionation; inductively coupled plasma mass spectrometry; limit of detection; moisture; oxidation; priority journal; China; Guizhou; Jinsha
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/248627
作者单位	State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China; University of Chinese Academy of Sciences, Beijing, 100049, China; School of Resources and Environment, Zunyi Normal College, Zunyi, 563006, China; College of Chemical Engineering, Huaqiao University, Xiamen, 361021, China; Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, M3H 5T4, Canada; State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China
推荐引用方式 GB/T 7714	Li X.,Li Z.,Chen J.,et al. Isotope signatures of atmospheric mercury emitted from residential coal combustion[J],2021,246.
APA	Li X..,Li Z..,Chen J..,Zhang L..,Yin R..,...&Feng X..(2021).Isotope signatures of atmospheric mercury emitted from residential coal combustion.ATMOSPHERIC ENVIRONMENT,246.
MLA	Li X.,et al."Isotope signatures of atmospheric mercury emitted from residential coal combustion".ATMOSPHERIC ENVIRONMENT 246(2021).