干旱区生态环境知识资源中心(Arid): Demystifying mercury geochemistry in contaminated soil-groundwater systems with complementary mercury stable isotope, concentration, and speciation analyses

Arid

DOI	10.1039/d1em00368b
	Demystifying mercury geochemistry in contaminated soil-groundwater systems with complementary mercury stable isotope, concentration, and speciation analyses
	McLagan, D. S.; Schwab, L.; Wiederhold, J. G.; Chen, L.; Pietrucha, J.; Kraemer, S. M.; Biester, H.
通讯作者	McLagan, DS ; Biester, H (corresponding author)，Tech Univ Carolo Wilhelmina Braunschweig, Inst Geoecol, D-38106 Braunschweig, Germany. ; McLagan, DS (corresponding author)，Univ Toronto Scarborough, Dept Phys & Environm Sci, Toronto, ON M1C 1A4, Canada.
来源期刊	ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
ISSN	2050-7887
EISSN	2050-7895
出版年	2022-01
英文摘要	Interpretation of mercury (Hg) geochemistry in environmental systems remains a challenge. This is largely associated with the inability to identify specific Hg transformation processes and species using established analytical methods in Hg geochemistry (total Hg and Hg speciation). In this study, we demonstrate the improved Hg geochemical interpretation, particularly related to process tracing, that can be achieved when Hg stable isotope analyses are complemented by a suite of more established methods and applied to both solid- (soil) and liquid-phases (groundwater) across two Hg2+-chloride (HgCl2) contaminated sites with distinct geological and physicochemical properties. This novel approach allowed us to identify processes such as Hg2+ (i.e., HgCl2) sorption to the solid-phase, Hg2+ speciation changes associated with changes in groundwater level and redox conditions (particularly in the upper aquifer and capillary fringe), Hg2+ reduction to Hg-0, and dark abiotic redox equilibration between Hg-0 and Hg(ii). Hg stable isotope analyses play a critical role in our ability to distinguish, or trace, these in situ processes. While we caution against the non-critical use of Hg isotope data for source tracing in environmental systems, due to potentially variable source signatures and overprinting by transformation processes, our study demonstrates the benefits of combining multiple analytical approaches, including Hg isotope ratios as a process tracer, to obtain an improved picture of the enigmatic geochemical behavior and fate of Hg at contaminated legacy sites.
类型	Article ; Early Access
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000737814800001
WOS关键词	MASS-INDEPENDENT FRACTIONATION ; DISSOLVED ORGANIC-MATTER ; ARID-ZONE SOILS ; ELEMENTAL MERCURY ; HG-II ; SEQUENTIAL EXTRACTION ; ATMOSPHERIC MERCURY ; THERMAL-DESORPTION ; NUCLEAR VOLUME ; REDUCTION
WOS类目	Chemistry, Analytical ; Environmental Sciences
WOS研究方向	Chemistry ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377193
作者单位	[McLagan, D. S.; Chen, L.; Pietrucha, J.; Biester, H.] Tech Univ Carolo Wilhelmina Braunschweig, Inst Geoecol, D-38106 Braunschweig, Germany; [McLagan, D. S.] Univ Toronto Scarborough, Dept Phys & Environm Sci, Toronto, ON M1C 1A4, Canada; [Schwab, L.; Wiederhold, J. G.; Kraemer, S. M.] Univ Vienna, Ctr Microbiol & Environm Syst Sci, Dept Environm Geosci, A-1090 Vienna, Austria
推荐引用方式 GB/T 7714	McLagan, D. S.,Schwab, L.,Wiederhold, J. G.,et al. Demystifying mercury geochemistry in contaminated soil-groundwater systems with complementary mercury stable isotope, concentration, and speciation analyses[J],2022.
APA	McLagan, D. S..,Schwab, L..,Wiederhold, J. G..,Chen, L..,Pietrucha, J..,...&Biester, H..(2022).Demystifying mercury geochemistry in contaminated soil-groundwater systems with complementary mercury stable isotope, concentration, and speciation analyses.ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS.
MLA	McLagan, D. S.,et al."Demystifying mercury geochemistry in contaminated soil-groundwater systems with complementary mercury stable isotope, concentration, and speciation analyses".ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS (2022).