Labile carbon inputs boost microbial contribution to legacy mercury reduction and emissions from industry-polluted soils

Hao, Xiuli; Zhao, Qianqian; Zhou, Xinquan; Huang, Qiaoyun; Liu, Yu-Rong

doi:10.1016/j.jhazmat.2023.133122

Journal of Hazardous Materials

2024

DOI: 10.1016/j.jhazmat.2023.133122

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Labile carbon inputs boost microbial contribution to legacy mercury reduction and emissions from industry-polluted soils

Xiuli Hao,

Qianqian Zhao,

Xinquan Zhou

et al.

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Warming-Induced Vegetation Greening May Aggravate Soil Mercury Levels Worldwide

Guo,

Liu,

Zhang

et al. 2024

Environ. Sci. Technol.

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Mercury, a neurotoxic substance, circulates globally, significantly stored in soils through atmospheric deposition and plant decay. Despite being deposited, mercury can be remobilized and released into the atmosphere and water, enhancing its global cycle. Recent research suggests that climate warming may amplify the remobilization of soil mercury, facilitating its incorporation into food webs that humans exploit. However, the potential geospatial feedback of soil mercury levels in response to warming remains unclear. By leveraging up-to-date soil measurements and observation-driven models, we determined the amount of mercury stored in global 0–100 cm soils to be 4.3 Tg (interquartile range: 2.5–6.3 Tg). Furthermore, our analysis indicates that warming likely aggravates global soil mercury levels, particularly in many temperate areas in East Asia, North Europe, and North America (>20 ng g–1 increase by 2100) due to warming-induced vegetation greening. Critically, observation-driven models raise the possibility that implementing ambitious mercury-emission-control schemes alone may be insufficient to counterbalance the positive feedback of soil mercury concentration, while process-based biogeochemical modeling demonstrates consistent patterns that reinforce this concern. These findings hold broad implications; for example, such feedback may catalyze mercury remobilization in land-ocean continuums and exacerbate human risks, stressing the necessity for continued reductions in greenhouse gas and mercury emissions.

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Warming-Induced Vegetation Greening May Aggravate Soil Mercury Levels Worldwide

Guo,

Liu,

Zhang

et al. 2024

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

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Labile carbon inputs boost microbial contribution to legacy mercury reduction and emissions from industry-polluted soils

Cited by 1 publication

References 67 publications

Warming-Induced Vegetation Greening May Aggravate Soil Mercury Levels Worldwide

Warming-Induced Vegetation Greening May Aggravate Soil Mercury Levels Worldwide

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