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Extraction and Quantification of Nanoparticulate Mercury in Natural Soils
Weiping Cai; Yujun Wang; Yu Feng; Peng Liu; Shuofei Dong; Bo Meng; Hua Gong; Fei Dang
2022
Source PublicationEnvironmental Science & Technology
Volume56Issue:3Pages:1763–1770
Abstract

Nanoparticulate mercury (Hg-NPs) are ubiquitous in nature. However, the lack of data on their concentration in soils impedes reliable risk assessments. This is due to the analytical difficulties resulting from low ambient Hg concentrations and background interferences of heterogeneous soil components. Here, coupled to single particle inductively coupled plasma-mass spectrometry (spICP-MS), a standardized protocol was developed for extraction and quantification of Hg-NPs in natural soils with a wide range of properties. High particle number-, particle mass-, and total mass-based recoveries were obtained for spiked HgS-NPs (74−120%). Indigenous Hg-NPs across soils were within 107 −1011 NPs g−1 , corresponding to 3−40% of total Hg on a mass basis. Metacinnabar was the primary Hg species in extracted samples from the Wanshan mercury mining site, as characterized by X-ray absorption spectroscopy and transmission electron microscopy. In agreement with the spICP-MS analysis, electron microscopy revealed comparable size distribution for nanoparticles larger than 27 nm. These indigenous Hg-NPs contributed to 5−65% of the measured methylmercury in soils. This work paves the way for experimental determinations of indigenous Hg-NPs in natural soils, which is critical to understand the biogeochemical cycling of mercury and thereby the methylation processes governing the public exposure to methylmercury.

KeywordMercury nanoparticles particle Number Soils extraction
DOI10.1021/acs.est.1c07039
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Indexed BySCI
Language英语
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Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/13586
Collection环境地球化学国家重点实验室
Affiliation1.Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
3.School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
4.Agilent Technologies Co., Ltd (China), Beijing 100102, China
5.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
Recommended Citation
GB/T 7714
Weiping Cai,Yujun Wang,Yu Feng,et al. Extraction and Quantification of Nanoparticulate Mercury in Natural Soils[J]. Environmental Science & Technology,2022,56(3):1763–1770.
APA Weiping Cai.,Yujun Wang.,Yu Feng.,Peng Liu.,Shuofei Dong.,...&Fei Dang.(2022).Extraction and Quantification of Nanoparticulate Mercury in Natural Soils.Environmental Science & Technology,56(3),1763–1770.
MLA Weiping Cai,et al."Extraction and Quantification of Nanoparticulate Mercury in Natural Soils".Environmental Science & Technology 56.3(2022):1763–1770.
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