Geochemical characterization of a spanish leonardite coal

• Autorzy: Olivella M. A. , Sole M. , Gorchs R. , Lao C. , De Las Heras F. X. C.

Warianty tytułu

PL

Geochemiczna charakterystyka hiszpańskiego węgla leonardite

• Języki publikacji: EN

Abstrakty

EN

Geochemical characterization of the inorganic and organic fractions of a Spanish leonardite coal (Torrelapaja, Cretaceous basin belonging to the Utrillas facies) and their humic acids were accomplished. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) was used to analyze trace elements with the aim to know their suitability for subsequent environmental applications. All trace elements analyzed in this study fell in the range of most worldwide coals except U (107 ppm) for leonardite, showing a value 45 times higher compared to the worldwide coals. The spectrum IR of the humic acid fraction shows an increase of carboxylic groups in comparison with the spectrum of leonardite. X-ray diffractometry (XRD) and SEM (Scanning electron microscopy) coupled to energy dispersive X-ray (EDX) techniques were also applied to identify the crystalline phases and the inorganic sulfur forms from leonardite, respectively. The organic soluble extract was also studied in order to determine the depositional environment of the leonardite coal.

PL

Dokonano geochemicznej charakterystyki nieorganicznych i organicznych frakcji hiszpańskiego węgla leonardite (basen kredowy Torrelapaja, należący do facji Utrillas) i ich kwasów humusowych (humic acids). Analizy pierwiastków śladowych dokonano za pomocą spektrometrii mas z jonizacją w plazmie sprzężonej indukcyjnie (ICP-MS) w celu poznania ich przydatności do dalszych zastosowań środowiskowych. Wszystkie pierwiastki śladowe analizowane na potrzeby tego badania mieściły się w przedziale właściwym dla większości światowych węgli, za wyjątkiem uranu (107 ppm), którego wartość dla węgla leonardite była 45 razy wyższa w porównaniu do światowych węgli. Widmo podczerwieni frakcji kwasu humusowego wykazuje zwiększoną ilość grup karboksylowych w porównaniu do widma węgla leonardite. Dyfraktometria rentgenowska (XRD) oraz elektronowa mikroskopia skaningowa (SEM) w połączeniu z technikami spektrometrii rentgenowskiej dyspersyjnej (EDX) zostały zastosowane, aby zidentyfikować odpowiednio fazy krystaliczne i nieorganiczne formy siarkowe z węgla leonardite. Organiczny rozpuszczalny ekstrakt został także przebadany, aby określić środowisko złożowe węgla leonardite.

Słowa kluczowe

EN

leonardite coal; humic acid; ICP-MS; trace elements; uranium; depositional environment

PL

węgiel leonardite; kwas humusowy; ICP-MS; pierwiastki śladowe; uran; środowisko złożowe

• Wydawca: Instytut Mechaniki Górotworu PAN
• Czasopismo: Archives of Mining Sciences
• Rocznik: 2011
• Tom: Vol. 56, no 4
• Strony: 789--804
• Opis fizyczny: Bibliogr. 53 poz., tab., wykr.

Twórcy

autor

Olivella M. A.

autor

Sole M.

autor

Gorchs R.

autor

Lao C.

autor

De Las Heras F. X. C.

• Universitat De Girona. Department of Chemistry. Avda. Lluís Santaló, 17003-Girona, Spain,

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