Anthropogenic mercury sequestration in different soil types on the southeast coast of China

Zhang, Haibo; Li, Yuan; Luo, Yongming; Christie, Peter

doi:10.1007/s11368-015-1062-1

Cited by 14 publications

(14 citation statements)

References 37 publications

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“…Although we expected Hg concentrations to decrease with depth, we hypothesized that Hg inventories in deep regolith (>1.0 m) would be equal to or greater than Hg in surface soils (0-0.3 m) due to the greater mass and depth of material. Moreover, we anticipated that the majority of Hg inventories would not be sourced from weathering but instead sourced from atmospheric deposition or lateral transport of geogenic or anthropogenic Hg (from weathering of bedrock; e.g., Grimaldi et al, 2008;Guedron et al, 2006;Hissler & Probst, 2006;Zhang et al, 2015). Global Biogeochemical Cycles degradation and forest regeneration caused by agricultural land uses and reforestation (Richter & Markewitz, 2001).…”

Section: Introductionmentioning

confidence: 99%

Mercury Sourcing and Sequestration in Weathering Profiles at Six Critical Zone Observatories

Richardson

Aguirre

Buss

et al. 2018

Global Biogeochemical Cycles

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Mercury sequestration in regolith (soils + weathered bedrock) is an important ecosystem service of the critical zone. This has largely remained unexplored, due to the difficulty of sample collection and the assumption that Hg is predominantly sequestered within surface soils (here we define as 0–0.3 m). We measured Hg concentrations and inventories in weathering profiles at six Critical Zone Observatories (CZOs): Boulder Creek in the Front Range of Colorado, Calhoun in the South Carolina Piedmont, Eel River in coastal northern California, Luquillo in the tropical montane forest of Puerto Rico, Shale Hills of the valley and ridges of central Pennsylvania, and Southern Sierra in the Sierra Nevada range of California. Surface soils had higher Hg concentrations than the deepest regolith samples, except for Eel River, which had lower Hg concentrations in surface soils compared to regolith. Using Ti normalization, CZOs with <12% rock‐derived Hg (Boulder Creek, Calhoun, and Southern Sierra) had Hg peaks between 1.5 and 8.0 m in depth. At CZOs with >50% rock‐derived Hg, Eel River Hg concentrations and pools were greatest at >4.0 m in the weathering profile, while Luquillo and Shale Hills had peaks at the surface that diminished within 1.0 m of the surface. Hg and total organic C were only significantly correlated in regolith at Luquillo and Shale Hills CZOs, suggesting that Hg sorption to organic matter may be less dominant than clays or Fe(II) sulfides in deeper regolith. Our results demonstrate the importance of Hg sequestration in deep regolith, below typical soil sampling depths.

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Section: Introductionmentioning

confidence: 99%

Mercury Sourcing and Sequestration in Weathering Profiles at Six Critical Zone Observatories

Richardson

Aguirre

Buss

et al. 2018

Global Biogeochemical Cycles

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“…Generally, deep soils from SH and NB exhibited lower levels of total concentrations of pollutants, as well as b‐Hg and b‐PHE, than the surface soils (data not shown). Indeed, Hg and PHE mainly originated from fossil energy combustion and accumulated on the surface soil (Ping et al, 2007; Zhang et al, 2015). Our results further suggested that surface soil was suitable for biosensing assessment, and subsequent experiments were performed using these surface soil samples.…”

Section: Resultsmentioning

confidence: 99%

Bacterial Bioreporter‐Based Mercury and Phenanthrene Assessment in Yangtze River Delta Soils of China

Yuan

et al. 2018

J of Env Quality

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Genetically engineered bacterial whole-cell bioreporters were deployed to investigate bioavailable mercury (b-Hg) and phenanthrene (b-PHE). Characterized by high sensitivity and specificity in aqueous solutions, the bioreporter system could detect in amended soils the concentrations of b-Hg and b-PHE in the ranges of 19.6 to 111.6 and 21.5 to 110.9 μg kg, respectively. The sensitivity of the system allowed for the combined analysis of b-Hg and b-PHE from real environmental samples. Therefore, soil samples from three large refinery facilities were tested, and the results from the instrumental analysis strongly correlated with the ones obtained with the bioreporter method. Large-scale and fast screening of soil contamination across the Yangtze River Delta in Eastern China was conducted. More than 36% of the samples contained b-Hg, whereas the fractions of b-PHE were below the detection limit for all the samples. These results indicated a higher toxicity and more hazardous condition for Hg contamination than for PHE. Population densities and airborne 10-μm particulate matter (PM10) concentrations were used as parameters for comparison with the spatial distribution of the b-Hg and b-PHE fractions. The results revealed that the bioreporters could offer a rapid and cost-efficient method to test soil samples from contaminated areas and provide a screening tool for environmental risk assessment.

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“…2. Moreover, the ASGM emissions data shown in the figures are calculated for the region of East and Southeast Asia [32,33]. The proportion for China requires further analysis.…”

Section: Source Composition Of Mercury Emissions In Chinamentioning

confidence: 99%

Mercury emissions in China: a general review

Jiang

Wang

2019

Waste Dispos. Sustain. Energy

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This paper provides a general review of the research status of mercury emissions in China. Global surveys rank Asia as the region with the largest share of global mercury emissions, accounting for almost half. China contributes about one-third of the world's mercury emissions, which is 600-800 t per year. And thus, it plays a vital role in reducing global mercury emissions. Data since 2003 has been surveyed. Mercury emissions in China have risen in the beginning and then declined. There are differences in the composition of mercury emissions sources between China and the world, in which coal combustion and non-ferrous metals smelting contribute more than 50% of the emissions in China. Although mercury emission standards in China are close to those of the European Union and the United States, annual mercury emissions in China are four times higher than those of the United States. Mercury emissions in China are concentrated in the central and eastern regions now, but the annual mercury emissions are increasing in the western regions, which may be related to the construction of industrial parks.

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Anthropogenic mercury sequestration in different soil types on the southeast coast of China

Cited by 14 publications

References 37 publications

Mercury Sourcing and Sequestration in Weathering Profiles at Six Critical Zone Observatories

Mercury Sourcing and Sequestration in Weathering Profiles at Six Critical Zone Observatories

Bacterial Bioreporter‐Based Mercury and Phenanthrene Assessment in Yangtze River Delta Soils of China

Mercury emissions in China: a general review

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