Wyniki wyszukiwania - BazTech

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Badania zmian ilościowych i jakościowych rozpuszczonego węgla nieorganicznego w strefie drenażu rzecznego

Chmiel S., Hałas S., Janusz J., Głowacki S., Trembaczowski A.

Przemysł Chemiczny

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2015

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T. 94, nr 6

994-998

PL

Przedstawiono wyniki badań zmian ilościowych i jakościowych rozpuszczonego węgla nieorganicznego oraz stosunków izotopowych ¹³C/¹²C w obiegu hydrologicznym w rejonie Wygnanowic (Wyżyna Lubelska). W badanych wodach wysokie stężenie CO₂(aq) miało źródło porowe drenujące utwory wieku czwartorzędowego. Znacznie niższe stężenie CO₂(aq) miały wody glebowe oraz wody głównego kredowego zbiornika wód podziemnych drenowane przez źródło szczelinowe i rzekę Giełczew. Wartości δ¹³C wskazują, że duże stężenie CO₂, w wodach źródła porowego może być wynikiem przemian biochemicznych zachodzących w torfach i glebach kopalnych. Wyniki badań udokumentowały wzrost zawartości ditlenku węgla podczas podziemnej fazy migracji wody poza współczesnym poziomem gleb.

EN

Groundwaters of the Wygnanowice area (Poland) were studied for dissolved inorg. C and ¹³C/¹²C isotope ratio in CO₂. The concns. of CO₂ in spring draining porous Quaternary rocks were higher than that in soil waters and water in solid rocks of Cretaceous aquifer, which are drained to the spring and the Giełczew river. The anal. of ¹³C isotope showed a high CO₂ concn. in the spring water because of biogenic processes in peats and/or fossil soils. The enrichment of water in CO₂ took place during infiltration below the level of soil.

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Could submarine groundwater discharge be a significant carbon source to the southern Baltic Sea?

Szymczycha B., Maciejewska A., Winogradow A., Pempkowiak J.

Oceanologia

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2014

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No. 56 (2)

327--347

EN

Submarine Groundwater Discharge (SGD) is an important yet poorly recognised pathway of material transport to the marine environment. This work reports on the results of dissolved inorganic carbon (DIC) and dissolved organic carbon (DOC) concentrations and loads in the groundwater seeping into the southern Baltic Sea. Most of the research was carried out in the Bay of Puck (2009-2010), while in 2013 the study was extended to include several other groundwater seepage impacted areas situated along the Polish coastline. The annual average concentrations of DIC and DOC in the groundwater were equal to 64.5 ± 10.0 mg C L-1 and 5.8 ± 0.9 mg C L-1 respectively. The carbon specific flux into the Bay of Puck was estimated at 850 mg m-2 yr-1. The loads of carbon via SGD were scaled up for the Baltic Sea sub-basins and the entire Baltic Sea. The DIC and DOC fluxes via SGD to the Baltic Sea were estimated at 283.6 ± 66.7 kt yr-1 and 25.5 ± 4.2 kt yr-1. The SGD derived carbon load to the Baltic Sea is an important component of the carbon budget, which gives the sea a firmly heterotrophic status.

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Metodyka analiz izotopowych rozpuszczonego węgla nieorganicznego (DIC) i ich zastosowania w badaniach hydrogeologicznych i środowiskowych

Szynkiewicz A., Drzewicki W., Jędrysek M. O.

Przegląd Geologiczny

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2006

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Vol. 54, nr 9

797-806

EN

The analysis of carbon isotope composition of dissolved inorganic carbon (DIC) is widely applied in hydrogeology and environmental studies. The method of analysis is simple and based on conversion of all DIC species to gaseus CO2 under acidic conditions. However, the analytical procedure may involve significant carbon isotope fractionation. Our experimental analysis showed that increasing the time of CO2 extraction influences the increase of ä13C(DIC) value as a result of re-dissolution of CO2 in the water expanded on the vacuum line or/and carbon isotope exchange between the extracted CO2 and the atmospheric CO2. The long time of sample storage yields an increase of ä13C(DIC) value and decrease of DIC concentration. The analytical precision up to š 0,1‰ may be achieved in the case of waters being analyzed few days after sampling. DIC concentration was evaluated according to height of peak 44 in the mass spectrum. The analytical precision of this method was š 2 mgCO2 per dm3. This method is very useful because the measurements of the height of peak 44 and carbon isotope composition of DIC can be performed simultaneously. However, this method is reliable for waters containing more than 4 mg CO2 per dm3