Re-emission of legacy mercury from soil adjacent to closed point sources of Hg emission

Environmental Pollution
Wei ZhuXinbin Feng

Abstract

Mercury (Hg) emissions from point sources to air may disperse over long distance depending on Hg speciation in the plume. A significant fraction of Hg, particularly in its divalent forms, deposits locally and causes pollution to surrounding biomes. The objective of this study was to investigate (1) the historic Hg deposition to the immediate vicinity of an industrial complex that had intentional use of Hg (i.e., chlor-alkali and polyvinyl chloride production) for 5 decades until 2011, and (2) the Hg0 re-emission from soil to air soon after the closure of the facility. The spatial distribution of near-ground Hg0 vapor in air, soil Hg concentration and stable isotope ratio, air-soil Hg0 flux and Hg0 concentration in soil pore-gas were measured. It was found that the surrounding soils are severely contaminated with Hg due to the Hg release of the industrial complex, displaying soil Hg content up to 4.8 μg g-1. A spatial trend of Hg mass dependent isotope fractionation signature (δ202Hg = -2.11‰ to 0.72‰) with respect to the distance from the closed facility was identified, representing a mixing between regional background and industrial Hg sources. Hg release from the industrial operation enhanced surface soil Hg content within a ...Continue Reading

Citations

May 29, 2019·Basic & Clinical Pharmacology & Toxicology·Geir BjørklundJan Aaseth
Apr 20, 2019·Environmental Science and Pollution Research International·Shalini Singh, Vipin Kumar
Dec 5, 2020·International Journal of Environmental Research and Public Health·Mert GuneyFerhat Karaca
Feb 27, 2021·Environmental Science and Pollution Research International·Zhonggen LiXinbin Feng
Mar 20, 2021·The Science of the Total Environment·Cristiano BallabioPanos Panagos
Apr 4, 2021·International Journal of Environmental Research and Public Health·Emanuela D TiodarDorina Podar
Jul 30, 2020·Journal of Environmental Management·Anastasios ChalkidisSuresh K Bhargava
Jun 3, 2021·Journal of Fungi·Cristina L VăcarDorina Podar

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