Simultaneous determination of mercury and organic carbon in sediment and soils using a direct mercury analyzer based on thermal decomposition–atomic absorption spectrophotometry

Chen, Jingjing; Chakravarty, Pragya; Davidson, Gregg R.; Wren, Daniel G.; Locke, Martin A.; Brown, Garry; Cizdziel, James V.

doi:10.1016/j.aca.2015.03.011

Cited by 31 publications

(10 citation statements)

References 25 publications

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“…Sample boats were pre-heated to remove Hg and blanks were analyzed before testing the samples. Loss-on-ignition (LOI) was used as an estimate of organic matter, and was determined by weighing the sample before and after the combustion analysis [15].…”

Section: Total-hg and Organic Matter Content Measurementsmentioning

confidence: 99%

Air/Surface Exchange of Gaseous Elemental Mercury at Different Landscapes in Mississippi, USA

et al. 2019

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Mercury (Hg) is a global pollutant with human health and ecological impacts. Gas exchange between terrestrial surfaces and the atmosphere is an important route for Hg to enter and exit ecosystems. Here, we used a dynamic flux chamber to measure gaseous elemental Hg (GEM) exchange over different landscapes in Mississippi, including in situ measurements for a wetland (soil and water), forest floor, pond, mowed field and grass-covered lawn, as well as mesocosm experiments for three different agricultural soils. Fluxes were measured during both the summer and winter. Mean ambient levels of GEM ranged between 0.93–1.57 ng m−3. GEM emission fluxes varied diurnally with higher daytime fluxes, driven primarily by solar radiation, and lower and more stable nighttime fluxes, dependent mostly on temperature. GEM fluxes (ng m−2 h−1) were seasonally dependent with net emission during the summer (mean 2.15, range 0.32 to 4.92) and net deposition during the winter (−0.12, range −0.32 to 0.12). Total Hg concentrations in the soil ranged from 17.1 ng g−1 to 127 ng g−1 but were not a good predictor of GEM emissions. GEM flux and soil temperature were correlated over the forest floor, and the corresponding activation energy for Hg emission was ~31 kcal mol−1 using the Arrhenius equation. There were significant differences in GEM fluxes between the habitats with emissions for grass > wetland soil > mowed field > pond > wetland water ≈ forest ≈ agriculture soils. Overall, we demonstrate that these diverse landscapes serve as both sources and sinks for airborne Hg depending on the season and meteorological factors.

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Section: Total-hg and Organic Matter Content Measurementsmentioning

confidence: 99%

Air/Surface Exchange of Gaseous Elemental Mercury at Different Landscapes in Mississippi, USA

et al. 2019

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“…However, in this case the organic matters did not correlated with the concentration of Hg in soil. This result was verified by an obtained result in Gőta River, Sweden, where r=0.4 was identified between the organic matter and total Hg [36,37]. It is depended on the quality of soil, such as the binding strength of Hg and pH, rather than the organic matters contained in soil [37,38,39].…”

Section: Mercury In Soilmentioning

confidence: 63%

Assessing a Mercury Affected Area from Small-scale Gold Mining in Poboya, Central Sulawesi, Indonesia

Sari¹,

Inoue²,

Matsumoto³

et al. 2016

eer

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Poboya, Central Sulawesi is one of the primary sites used for small-scale gold mining activities in Indonesia. Poboya consumes 200-500 kg of mercury/day by amalgamation. Palu, the capital city of Central Sulawesi, is a city with a population of 0.35 million people and located around 11 km away from the edge of a small-scale gold mining area in Poboya. Fifteen samples of upper layer soil and fifteen samples of plant (Calotropis gigantean) were taken along the road that connects Poboya to Palu, at every 500 m. Mercury concentration in the soil samples showed a gradual decrement as the distance from Poboya became greater. The plant samples also revealed a similar trend to the soil samples. The highest concentration of mercury in the soil was found at Poboya-i.e. 17.62 ng/mg, and the concentration of mercury in Calotropis gigantean grown at Poboya was 6.5 ng/mg. Based on the soil samples and pollution index, the data showed that the research area had heavy pollution levels up to 4 km. Moreover, the transfer factor was in the range of 0.13-3.44 at distances of 0-4 km, respectively.

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“…Following water samples, the most frequently analyzed material for mercury was seafood samples, such as fish, shrimp, and seaweed. A few studies reported the determination of mercury in various environmental samples, such as petroleum hydrocarbons [ 88 ], human hair [ 89 , 90 ], phosphate fertilizers [ 53 ], glycerin [ 91 ], sediments [ 55 , 92 , 93 ], cosmetics [ 94 ], living cells [ 66 , 95 ], and tobacco [ 67 ]. However, a few methods [ 74 , 81 , 87 , 96 – 101 ] did not report their applicability to natural samples.…”

Section: Discussionmentioning

confidence: 99%

“…More than 90% of studies using electrochemical methods or spectrophotometry and spectrofluorometry techniques determined divalent inorganic mercury and did not report speciation. However, a few reported [ 51 , 53 , 55 , 57 , 58 , 60 – 62 , 66 – 68 , 85 , 86 , 93 , 102 – 106 , 108 , 109 ] total mercury content in various samples, which does not accurately predict toxicity based on its concentration.…”

Section: Discussionmentioning

confidence: 99%

Recent Studies on the Speciation and Determination of Mercury in Different Environmental Matrices Using Various Analytical Techniques

Suvarapu

Baek

2017

International Journal of Analytical Chemistry

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This paper reviews the current research on the speciation and determination of mercury by various analytical techniques, including the atomic absorption spectrometry (AAS), voltammetry, inductively coupled plasma optical emission spectrometry (ICP-OES), ICP-mass spectrometry (MS), atomic fluorescence spectrometry (AFS), spectrophotometry, spectrofluorometry, and high performance liquid chromatography (HPLC). Approximately 96 research papers on the speciation and determination of mercury by various analytical instruments published in international journals since 2015 were reviewed. All analytical parameters, including the limits of detection, linearity range, quality assurance and control, applicability, and interfering ions, evaluated in the reviewed articles were tabulated. In this review, we found a lack of information in speciation studies of mercury in recent years. Another important conclusion from this review was that there were few studies regarding the concentration of mercury in the atmosphere.

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Simultaneous determination of mercury and organic carbon in sediment and soils using a direct mercury analyzer based on thermal decomposition–atomic absorption spectrophotometry

Cited by 31 publications

References 25 publications

Air/Surface Exchange of Gaseous Elemental Mercury at Different Landscapes in Mississippi, USA

Air/Surface Exchange of Gaseous Elemental Mercury at Different Landscapes in Mississippi, USA

Assessing a Mercury Affected Area from Small-scale Gold Mining in Poboya, Central Sulawesi, Indonesia

Recent Studies on the Speciation and Determination of Mercury in Different Environmental Matrices Using Various Analytical Techniques

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