Geochemistry of Miocene lacustrine sediments from the Sokolov Coal Basin (Czech Republic)

Křı́bek, Bohdan; Strnad, M.; Boháček, Zbyněk; Sýkorová, Ivana; Čejka, Jiřı́; Sobalı́k, Zdenĕk

doi:10.1016/s0166-5162(98)00002-0

Cited by 71 publications

(30 citation statements)

References 22 publications

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“…This effect was more pronounced in alder sites. Litter fragmentation enhanced by soil macrofauna may increase the leaching of easily available substances into the mineral soil, which may support microbial respiration either directly or indirectly by a priming effect that enhances the decomposition of fossil organic matter abundant in Sokolov tertiary clays (Kříbek et al 1998). Preliminarily laboratory experiments indicated that the processing of alder litter by soil macrofauna increased microbial respiration more than spontaneous litter processing (Frouz et al 2007).…”

Section: Discussionmentioning

confidence: 99%

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The effect of litter type and macrofauna community on litter decomposition and organic matter accumulation in post-mining sites

Frouz

2008

Biologia

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Field microcosms consisting of mineral soil (spoil substrate) and two types of litter taken either from an unreclaimed site with spontaneously developed vegetation (mostly Salix caprea) or from an alder plantation (a mixture of Alnus glutinosa and A. incana) were exposed in spontaneously developed or reclaimed sites at a post-mining heap near Sokolov (Czech Republic) for one year. The litter types differed remarkably in C:N ratio which was 29 for spontaneous litter and 14 for alder litter. The two microcosm types were either accessible or not accessible to soil macrofauna. The effect of macrofauna exclusion on soil mixing was complex and depended on litter quality and the site that determined soil fauna composition. In reclaimed sites where macrofauna was dominated by saprophags, mainly earthworms, the macrofauna access increased soil mixing. In sites where predators dominated, the macrofauna exclusion probably suppressed fragmentation and mixing activity of the mesofauna.

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Section: Discussionmentioning

confidence: 99%

“…The two selected study sites were located about 1 km apart; both were located on clay spoil of the so-called cypris formation, the most common type of heap spoil substrate in the area (Kříbek et al 1998). The first site was reclaimed by alder planting (a mixture of Alnus glutinosa and A. incana) 30 years ago.…”

Section: Methodsmentioning

confidence: 99%

The effect of litter type and macrofauna community on litter decomposition and organic matter accumulation in post-mining sites

Frouz

2008

Biologia

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“…Although both mechanisms may have occurred in all substrates, the former is probably important in coal-rich substrates because such substrates contain coal dust. The latter mechanism is probably more important in coal-free clays, because kerogen is bound to the mineral matrix (Kříbek et al 1998;Rojík 2004). However, the microbial degradation of both coal and claybound organic matter is reported (Machnikowska et al 2002;Frouz et al 2011a).…”

Section: Discussionmentioning

confidence: 99%

Effect of accelerated weathering and leaching on the chemistry and phytotoxicity of coal-mine overburden

Frouz

Zadinová

Mihaljevič

et al. 2014

European Journal of Environmental Sciences

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Overburden weathering may influence its effects on soil development and plant growth. Here, an accelerated-weathering experiment was used to determine how weathering affects the chemistry and toxicity of coal-mine overburden. Seven samples of overburden were collected; two samples were from a heap of partly weathered material, and five from mining pits. In both cases, the most weathered top 10 cm was removed. Samples included coal-rich clays (with > 1% coal) and coal-free clays. The samples were artificially weathered by subjecting them to 20 cycles of drying-rewetting-freezing-thawing. Coal-rich clays that have not been weathered were acidic and toxic to Sinapis alba seedlings, but weathering increased their pH, reduced their conductivity and tended to reduce their phytotoxicity. In contrast, weathering tended to reduce the pH of coal-free alkaline clays. S. alba grew poorly in weathered coal-free clay, but when grown in coal-rich clays it grew better in some substrates whereas others were phytotoxic due to their high As content. Weathering decreased Al, As and Na contents and decreased substrate mass by 1-37%. Overall, these results indicate that weathering changes the properties of overburden in ways that are important for soil development and plant growth but the nature and extent of the changes depend on the initial composition of the substrate.

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“…The main coal seam Antonín was deposited approximately 22 million years ago. The stratigraphy of the Sokolov series of strata including Antonín strata and the geochemistry of the sediments of the Sokolov Basin have been described in detail in (Rojík, 2004(Rojík, , 2006Kříbek et al, 1998).…”

Section: The Antonín Seam and Their Sedimentation Environmentmentioning

confidence: 99%

A Complex Use of the Materials Extracted from an Open-Cast Lignite Mine

Buryan¹,

Bučko²,

Mika³

2014

Archives of Mining Sciences

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The company Sokolovská uhelná, was the largest producer of city gas in the Czech Republic. After its substitution by natural gas the gasification technology became the basis of the production of electricity in the combine cycle power plant with total output 400 MW. For the possibility of gasification of liquid by--products forming during the coal gasification a entrained-flow gasifier capable to process also alternative liquid fuels has been in installed. The concentrated waste gas with these sulphur compounds is conducted to the desulphurisation where the highly desired, pure, 96 % H 2 SO 4 is produced.Briquettable brown coal is crushed, milled and dried and then it is passed into briquetting presses where briquettes, used mainly as a fuel in households, are pressed without binder in the punch under the pressure of 175 MPa. Fine brown coal dust (multidust) is commercially used for heat production in pulverized-coal burners. It forms not only during coal drying after separation on electrostatic separators, but it is also acquired by milling of dried coal in a vibratory bar mill.Slag from boilers of classical power plant, cinder form generators and ashes deposited at the dump are dehydrated and they are used as a quality bedding material during construction of communications in the mines of SUAS. Fly ash is used in building industry for partial substitution of cement in concrete. Flue gases after separation of fly ash are desulphurized by wet limestone method, where the main product is gypsum used, among others, in the building industry.Expanded clays from overburdens of coal seams, that are raw material for the production of "Liapor" artificial aggregate, are used heavily. This artificial aggregate is characterized by outstanding thermal and acoustic insulating properties.Keywords: coal, gasification, clean coal technology, combined cycle power plant Przedsiębiorstwo Sokolovska uhelna jest największym producentem gazu miejskiego w Republice Czeskiej. Po jego zastąpieniu przez gaz ziemny, technologia gazyfikacji stała się podstawą do produkcji elektryczności w elektrowni o cyklu mieszanym o całkowitej mocy wyjściowej 400 MW. W celu umożli-wienia gazyfikacji ciekłych produktów ubocznych gazyfikacji węgla, zainstalowano na drodze przepływu generator gazu, umożliwiający przetwarzanie alternatywnych paliw ciekłych. Skoncentrowany gaz odlotowy Węgiel brunatny nadający się do produkcji brykietów jest kruszony, mielony i suszony, następnie przechodzi przez proces brykietowania w odpowiednich prasach, gdzie formowane są brykiety, poprzez ich sprasowanie pod ciśnieniem 175 MPa. Brykiety takie wykorzystywane są powszechnie jako paliwo w gospodarstwach domowych. Drobnoziarniste pyły węgla brunatnego (paliwa pyłowe) wykorzystywane są na skalę komercyjną do produkcji ciepła w paleniskach pyłowych. Pyły węglowe powstają nie tylko w trakcie suszenia węgla po procesie oddzielania w separatorach elektrostatycznych, lecz także w procesie mielenia suszonego węgla w młynach wibracyjnych.Żużel z kotłów w konwencjonalnej elektrowni, p...

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Geochemistry of Miocene lacustrine sediments from the Sokolov Coal Basin (Czech Republic)

Cited by 71 publications

References 22 publications

The effect of litter type and macrofauna community on litter decomposition and organic matter accumulation in post-mining sites

The effect of litter type and macrofauna community on litter decomposition and organic matter accumulation in post-mining sites

Effect of accelerated weathering and leaching on the chemistry and phytotoxicity of coal-mine overburden

A Complex Use of the Materials Extracted from an Open-Cast Lignite Mine

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