An experimental study of the impacts of solar radiation and temperature on mercury emission from different natural soils across China

Xie, Han; Liu, Maodian; He, Yipeng; Lin, Huiming; Yu, Chenghao; Deng, Chunyan; Wang, Xuejun

doi:10.1007/s10661-019-7717-4

Cited by 3 publications

(2 citation statements)

References 71 publications

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“…Therefore, the influencing effects of air humidity on the mercury exchange processes at the soil/gas interfaces were considered to only be a representation of the diurnal variations in the mercury flux. A number of previous studies [93,94] have indicated that, within a certain range, increases in soil moisture can enhance soil mercury-release flux. When water content increases, the distribution of Hg 2+ in soil will change, and more Hg 2+ in the soil particles enters the soil liquid phase.…”

Section: Analysis Of the Significant Relationshipsmentioning

confidence: 99%

Characteristics of Mercury Fluxes between Soil and Air in the Farming-Pastoral Ecotone of Songnen Grassland

Sun

Zhang

et al. 2023

Sustainability

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In order to understand the characteristics and influencing factors of surface release fluxes in the typical agro-pastoral mosaic region of the Songnen grasslands of northern China, this study selected two sample plots to, respectively, represent the L. chinensis covered grassland (L), and the Z. mays covered fields (Z) in the Waizi area of Changling County, with western Jilin Province as the study area. This study investigated the atmospheric mercury (Total Gaseous Mercury (TGM)) concentrations, surface soil mercury concentrations, the gaseous elemental mercury exchange fluxes, and related environmental factors. The results showed that the TGM concentrations in two sample plots in the study area were basically the same during the summer and autumn months, but were higher in summer than in autumn, and there was a clear diurnal pattern. The average mercury concentrations in the surface soil were also higher in summer than in autumn. Furthermore, the surface soil has a clear mercury release process, and the mercury release were higher in the sheep grass field than the maize field during the same season. The mercury release fluxes in each site within the ecotone were related to the solar radiation and soil temperature values, and the effects of them on the soil mercury release were independent from one another.

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Section: Analysis Of the Significant Relationshipsmentioning

confidence: 99%

Characteristics of Mercury Fluxes between Soil and Air in the Farming-Pastoral Ecotone of Songnen Grassland

Sun

Zhang

et al. 2023

Sustainability

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“…Heavy metal pollution is one of the most critical environmental problems, posing a serious threat to the ecosystem and human health [1,2]. Among the heavy metals, mercury (Hg) is one of the most toxic metals and is receiving increasing concern from the whole world [3][4][5]. China is one of the countries with the largest mercury production, consumption and anthropogenic emissions.…”

Section: Introductionmentioning

confidence: 99%

The Binding Ability of Mercury (Hg) to Photosystem I and II Explained the Difference in Its Toxicity on the Two Photosystems of Chlorella pyrenoidosa

Wang

Duo

Wufuer

et al. 2022

Toxics

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Mercury (Hg) poses high toxicity to organisms including algae. Studies showed that the growth and photosynthesis of green algae such as Chlorella are vulnerable to Hg stress. However, the differences between the activities and tolerance of photosystem I and II (PSI and PSII) of green microalgae under Hg exposure are still little known. Responses of quantum yields and electron transport rates (ETRs) of PSI and PSII of Chlorella pyrenoidosa to 0.05–1 mg/L Hg2+ were simultaneously measured for the first time by using the Dual-PAM-100 system. The photosystems were isolated to analyze the characteristics of toxicity of Hg during the binding process. The inhibition of Hg2+ on growth and photosystems was found. PSII was more seriously affected by Hg2+ than PSI. After Hg2+ exposure, the photochemical quantum yield of PSII [Y(II)] decreased with the increase in non-photochemical fluorescence quenching [Y(NO) and Y(NPQ)]. The toxic effects of Hg on the photochemical quantum yield and ETR in PSI were lower than those of PSII. The stimulation of cyclic electron yield (CEF) was essential for the stability and protection of PSI under Hg stress and played an important role in the induction of non-photochemical quenching (NPQ). The results showed a strong combination ability of Hg ions and photosystem particles. The number of the binding sites (n) of Hg on PSII was more than that of PSI, which may explain the different toxicity of Hg on PSII and PSI.

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Predicting Behavior and Fate of Atmospheric Mercury in Soils: Age-Dating METAALICUS Hg Isotope Spikes with Fallout Radionuclide Chronometry

Landis,

Taylor,

Hintelmann

et al. 2024

Environ. Sci. Technol.

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Soils accumulate anthropogenic mercury (Hg) from atmospheric deposition to terrestrial ecosystems. However, possible reemission of gaseous elemental mercury (GEM) back to the atmosphere as well as downward migration of Hg with soil leachate influence soil sequestration of Hg in ways not sufficiently understood in global biogeochemical models. Here, we apply fallout radionuclide (FRN) chronometry to understand soil Hg dynamics by revisiting the METAALICUS experiments 20 years after enriched isotope tracers ( 198 Hg, 200 Hg, 201 Hg, and 202 Hg) were applied to two boreal watersheds in northwestern Ontario, Canada. Hg spikes formed well-defined peaks in organic horizons of both watersheds at depths of 3−6 cm and were accurately dated to the year of spike application in 6 of 7 cases (error = −0.8 ± 1.2 years). A seventh site was depleted by ca. 90% of both the 200 Hg spike and background Hg, and the spike was dated 16 years older than its application. Robust FRN age models and mass balances demonstrate that loss of Hg is attributable to its specific physicochemical behavior at this site, but more work is required to attribute this to reemission or leaching. This study demonstrates the potential of FRN chronometry to provide insights into Hg accumulation, mobilization, and fate in forest soils.

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An experimental study of the impacts of solar radiation and temperature on mercury emission from different natural soils across China

Cited by 3 publications

References 71 publications

Characteristics of Mercury Fluxes between Soil and Air in the Farming-Pastoral Ecotone of Songnen Grassland

Characteristics of Mercury Fluxes between Soil and Air in the Farming-Pastoral Ecotone of Songnen Grassland

The Binding Ability of Mercury (Hg) to Photosystem I and II Explained the Difference in Its Toxicity on the Two Photosystems of Chlorella pyrenoidosa

Predicting Behavior and Fate of Atmospheric Mercury in Soils: Age-Dating METAALICUS Hg Isotope Spikes with Fallout Radionuclide Chronometry

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