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Isotopic composition for source identification of mercury in atmospheric fine particles
Qiang Huang; Jiubin Chen; Weilin Huang; Pingqing Fu; Benjamin Guinot; Xinbin Feng; Lihai Shang; Zhuhong Wang; Zhongwei Wang; Shengliu Yuan; Hongming Ca; Lianfang Wei; Ben Yu
2016
Source PublicationAtmospheric Chemistry & Physics
Volume16Issue:18
Abstract
The usefulness of mercury (Hg) isotopes for tracing the sources and pathways of Hg (and its vectors) in atmospheric fine particles (PM2.5 /is uncertain. Here, we measured Hg isotopic compositions in 30 potential source materials and 23 PM2.5 samples collected in four seasons from the megacity Beijing (China) and combined the seasonal variation in both mass-dependent fractionation (represented by the ratio Hg-202/Hg-198, delta Hg-202) and mass-independent fractionation of isotopes with odd and even mass numbers (represented by Delta Hg-199 and Delta Hg-200, respectively) with geochemical parameters and meteorological data to identify the sources of PM2.5-Hg and possible atmospheric particulate Hg transformation. All PM2.5 samples were highly enriched in Hg and other heavy metals and displayed wide ranges of both delta Hg-202 (-2.18 to 0.51 parts per thousand) and Delta Hg-199 (-0.53 to 0.57 parts per thousand), as well as small positive Delta Hg-200 (0.02 to 0.17 parts per thousand). The results indicated that the seasonal variation in Hg isotopic composition (and elemental concentrations) was likely derived from variable contributions from anthropogenic sources, with continuous input due to industrial activities (e.g., smelting, cement production and coal combustion) in all seasons, whereas coal combustion dominated in winter and biomass burning mainly found in autumn. The more positive Delta Hg-199 of PM2.5-Hg in spring and early summer was likely derived from long-range-transported Hg that had undergone extensive photochemical reduction. The study demonstrated that Hg isotopes may be potentially used for tracing the sources of particulate Hg and its vectors in the atmosphere.
Subject Area环境地球化学
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/6549
Collection环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
Recommended Citation
GB/T 7714
Qiang Huang,Jiubin Chen,Weilin Huang,et al. Isotopic composition for source identification of mercury in atmospheric fine particles[J]. Atmospheric Chemistry & Physics,2016,16(18).
APA Qiang Huang.,Jiubin Chen.,Weilin Huang.,Pingqing Fu.,Benjamin Guinot.,...&Ben Yu.(2016).Isotopic composition for source identification of mercury in atmospheric fine particles.Atmospheric Chemistry & Physics,16(18).
MLA Qiang Huang,et al."Isotopic composition for source identification of mercury in atmospheric fine particles".Atmospheric Chemistry & Physics 16.18(2016).
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