Wyniki wyszukiwania - BazTech

1

Variability of cation-exchange capacity (CEC) of fen peats in vertical profiles from eastern and central Poland in relation to function of peatlands as natural geological barriers

Rydelek P., Bąkowska A., Zawrzykraj P.

Studia Quaternaria

|

2016

|

Vol. 33, Nr 2

111--116

EN

An analysis of cation-exchange capacity (CEC) variability of peats is presented in vertical profiles from eastern and central Poland. CEC values were compared with ash content (Ac), pH and CaCO3 content. Eight peatlands were selected for research in the following areas: Warsaw Plateau (2 objects), Siedlce Plateau (2 objects), Lubartów Plateau (2 objects), Nałęczów Tableland (1 object) and Dobrohusk Depression (1 object). The peatlands represented a fen peat type of similar botanic compositions of sediments, but they differed in the area, peat thickness and drainage conditions. Characteristic regularities in CEC variability were noted in the peatlands and there were three types of CEC variability in vertical profiles. Carbonate peats (types 1 and 2) had the highest pH and definitely the highest values of CEC. In vertical profiles, there was also a zonation, but the regularities similar to non-carbonate peats were not observed. Different distribution of physical and chemical parameters were established in vertical profiles in partly drained peatlands (with a muck layer on top) with non-carbonate peats (type 3) and there were three distinct zones in vertical profiles, with different Ac and CEC. Determination of the vertical CEC variability and other physical and chemical parameters in peatlands made it possible to distinguish zones with potentially most beneficial isolation conditions.

2

Torfowiska niskie Wysoczyzny Lubartowskiej jako potencjalne naturalne bariery geologiczne

Rydelek P.

Biuletyn Państwowego Instytutu Geologicznego

|

2011

|

nr 446 (2)

407--415

PL

W pracy przedstawiono ocenę trzech torfowisk niskich Wysoczyzny Lubartowskiej (A, B i C), jako potencjalnych naturalnych barier geologicznych. Torfowiska A i B są położone na obszarze kemowym w obrębie wysoczyzny, zaś torfowisko C na granicy wysoczyzny i zbudowanego z lessów Płaskowyżu Nałęczowskiego. Oceniając właściwości izolacyjne badanych torfowisk, uwzględniono zarówno parametry fizyczno-chemiczne torfów, jak również budowę geologiczną torfowisk. Za najważniejsze kryteria zdolności izolacyjnych uznano: miąższość i ciągłość pokrywy torfu, litologię podłoża torfowisk, rodzaj występujących torfów, zawartość substancji organicznej, odczyn (pH), pojemność wymiany kationowej, współczynnik filtracji oraz zmienność parametrów w obrębie torfowisk. Najlepsze potencjalne właściwości izolacyjne wykazało torfowisko C. Osady występujące w jego obrębie wykazały zarówno najwyższe wartości pojemności wymiany kationowej, jak również najniższą przepuszczalność. Jednocześnie zmienność wspomnianych parametrów w obrębie torfowiska jest najmniejsza w porównaniu z torfowiskami A i B.

EN

The evaluation of three peatlands of Lubartów Upland (A, B and C) as the potential natural geological barriers was presented in this study. In the evaluation of isolating properties of studied peatlands both physic-chemical parameters and geological structure were taken into consideration. The following parameters were considered as the most important criteria of isolating properties: thickness and continuity of peat layer, lithology and subsoil, the type of peat, organic matter content, pH, cation exchange capacity (CEC), permeability coefficient and variability within the peatland area. The peatland C showed the best potential for having isolating properties. The deposits found in this peatland showed both highest values of cation exchange capacity and the lowest permeability. Moreover the variability of those parameters in the peatland C is the lowest in comparison to peatland A and B.

3

Wyznaczanie i ocena izolacyjności naturalnej bariery geologicznej w procesie cyfrowego przetwarzania danych geologicznych

Gabryś-Godlewska A., Gliwicz T., Grabowski D.

Przegląd Geologiczny

|

2007

|

Vol. 55, nr 5

416-423

EN

Numerical analysis of data from boreholes, applied during compilation of the "waste storage" database for the Geoenvironmental Map of Poland in 1 : 50,000 scale, allows quick and objective retrieval of comparable results. The goal of the borehole analysis is to find the proper insulating layers conforming to the waste storage standards, according to criteria specified in the Proclamation of the Ministry of the Minister of Environment dated on 24th March, 2003. The final result of such analysis is locating a natural geological barrier for depositories of neutral (O), hazardous (N) or other (K) wastes, with the most important insulative characteristics (depth of layer top, its thickness and lithology, presence of glacitectonic disturbances). The numerical analysis of data consists of 8 stages. Stage I assigns lithology of particular stratum to relevant insulation category (O, K, N). Stages II-III involve combining of the adjacent strata into stacks with the same or different insulation category and calculating their thickness. After excluding stacks thinner than 1 m (stage IV), checking the thickness of layers conforming to the hazardous waste storage standards (V) and taking into account the glacitectonic disturbances within the analyzed layers (stage VI), a natural geological barrier is delineated (stages VII-VIII). The practical advantage of the analysis is that the method is fast and gives unbiased, repeatable results.