Mercury speciation in soil in vicinity of coal beds using sequential extraction

Coufalík, Pavel; Červenka, Rostislav; Komárek, Josef

doi:10.1007/s12665-010-0537-z

Cited by 14 publications

(3 citation statements)

References 18 publications

(20 reference statements)

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“…Trace Hg analysis revealed that mercury contents in the Faroese coal are generally low. Similar or slightly higher concentrations were also reported from Palaeozoic bituminous coals from the Czech Republic (Coufalík et al, 2011). This observation supports the idea that no correlation exists between mercury content and coal rank (Kilgroe et al, 2002).…”

Section: Mercury Speciation Behaviour and Environmental Impactsupporting

confidence: 86%

Petrological and geochemical characteristics of Palaeogene low-rank coal on the Faroe Islands: Restricted effects of alteration by basaltic lava flows

Kuboušková

Krmíček

Coufalík

et al. 2016

International Journal of Coal Geology

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The first combined petrographic and geochemical investigation of coal from the Faroe Islands was performed as a case study to understand thermal effects from basaltic lava flows on immature coal. The samples were divided into two distinct groups: "normal" coal (xylite and detroxylite) and "altered organic matter" (charcoal and organic particles dispersed in samples rich in altered clastic mineral components or enriched via hydrothermal fluids). The "normal" coal consists primarily of huminite-group material dominated by ulminite. The proportions of material from inertinite and liptinite groups vary from sample to sample. The studied macerals are anisotropic with no observed reaction rims or vacuoles. According to the mean ulminite reflectance in combination with ultimate and proximate analyses, the coal reached the lignite and subbituminous stages. The maceral compositions together with coal palynology indicate a predominance of gelified wood-derived tissues and demonstrate that the coal evolved in wet forest swamps under limno-telmatic to telmatic conditions. Alteration effects on immature coals from overlying basalt flows were relatively limited. Due to relatively rapid heat loss from the basaltic lava, as verified by the presence of volcanic glass (tachylyte), its imposed thermal effects resulted only in development of a thin "anthracite-like" crust on samples with no elevated coal rank. Associated hydrothermal fluids induced coal hydrofracturing with subsequent mineral precipitation and decomposition of the ambient feldspar-rich volcaniclastic sediments. Altered organic matter is enriched in SiO 2 , Al 2 O 3 and FeO tot , as well as in trace elements such as Ni and Cr. In contrast, these samples are depleted in Hg (b10 ppb).

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Section: Mercury Speciation Behaviour and Environmental Impactsupporting

confidence: 86%

Petrological and geochemical characteristics of Palaeogene low-rank coal on the Faroe Islands: Restricted effects of alteration by basaltic lava flows

Kuboušková

Krmíček

Coufalík

et al. 2016

International Journal of Coal Geology

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“…The sequential extraction procedures designated as extraction procedure A (Zverina et al 2014) and extraction procedure B (Fernandez‐Martinez et al 2014) were used for fractionation analyses of mercury in the soil samples. Procedure A (Zverina et al 2014) is based on the method published by Bloom et al (2003) and Coufalik et al (2011).…”

Section: Methodsmentioning

confidence: 99%

Fractionation Analysis of Mercury in Soils: A Comparison of Three Techniques for Bioavailable Mercury Fraction Determination

Pelcová

Ridošková

Hrachovinová

et al. 2020

Enviro Toxic and Chemistry

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Knowledge of the fractionation of mercury in soils in the vicinity of abandoned cinnabar mines is essential for assessing the usability of soils for the cultivation of agriculturally important crops. Two different sequential extraction methods and the technique of diffusive gradients in thin films (DGT) were applied and compared for fractionation of mercury in soils from mercury‐contaminated sites intended for farming purposes. The mercury found in these soils was primarily in the form of mercury sulfide (58.6–83.9%), followed by 6.7 to 15.4% of organically bound mercury and 2.9 to 23.2% of elemental mercury. Up to 10.3% of labile mercury species were determined by both sequential extraction methods in these soils. However, only 0.01 to 0.13% of mercury was determined as a bioavailable fraction using the DGT technique. Both sequential extraction methods tested for the fractionation analysis of mercury in contaminated soils were in excellent agreement. The content of the mobile (labile) mercury determined by the sequential extraction methods was statistically significantly higher (p < 0.0001) than the content of bioavailable mercury determined by the DGT technique. Environ Toxicol Chem 2020;39:1670–1677. © 2020 SETAC

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“…The modes of occurrence of trace elements was studied by four-step sequential extraction test, which was originally developed to analyze soil samples and later modified to analyze coal. The methodology follows the previous studies [4][5][6][7], as shown in Fig. 1.…”

Section: Methodsmentioning

confidence: 99%

Modes of Occurrence of Trace Elements (Na, K, Fe, Si) in Coal Used for COREX Process

Zhang

Fan

2011

AMR

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In this paper, the modes of occurrence of the trace elements of Na, K, Fe and Si in SX-Coal and SD-Coal, which were used for COREX process, were analyzed. The coal was treated by wet digestion method and then the content of trace elements was analyzed. After that, the modes of occurrence of the elements were studied by sequential extraction procedure method and analyzed by ICP-OES. The results showed that the content of Na element is the highest and the content of K and Si elements is very low among the four elements in both kinds of coal. Na and K elements mainly exist in the mode of residue in SX-Coal and SD-Coal, and they are tends to enriched in the residue during the pyrolysis. Fe and Si elements mainly exist in the mode of carbonate, iron oxides and manganese oxides in SD-Coal. Fe and Si are tends to be decomposed from the compounds during the pyrolysis.

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Mercury speciation in soil in vicinity of coal beds using sequential extraction

Cited by 14 publications

References 18 publications

Petrological and geochemical characteristics of Palaeogene low-rank coal on the Faroe Islands: Restricted effects of alteration by basaltic lava flows

Petrological and geochemical characteristics of Palaeogene low-rank coal on the Faroe Islands: Restricted effects of alteration by basaltic lava flows

Fractionation Analysis of Mercury in Soils: A Comparison of Three Techniques for Bioavailable Mercury Fraction Determination

Modes of Occurrence of Trace Elements (Na, K, Fe, Si) in Coal Used for COREX Process

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