Wyniki wyszukiwania - BazTech

1

Speciation of heavy metals during co-composting of livestock manure

Gul S., Naz A., Fareed I., Khan A., Irshad M.

Polish Journal of Chemical Technology

|

2015

|

Vol. 17, nr 3

19--23

EN

Heavy metals determination in manures provides beneficial information to predict the availability and the potential contamination of environment. Therefore, a study was carried out to investigate heavy metals changes in livestock manure during a co-composting process. The metals were stepwise fractionated into exchangeable, adsorbed, organically bound, carbonate precipitated and residual forms by extracting with 0.5M KNO3, de-ionized water, 0.5M NaOH, 0.05M Na2EDTA and 4M HNO3, respectively. During the extraction process, the amount of metals remained highly dependent on an extraction method and stage of manure composting. Extractions released heavy metals contents in the final composted manure as Zn > Cu > Pb > Cr > Ni > Cd. Irrespective of the days of composting, extracting agents differed in the order HNO3 > Na2EDTA > NaOH > KNO3 > H2O for all heavy metals. Higher concentrations of heavy metals were observed during the early stages of composting. Conversely, there was a progressive increase in the concentrations of K, Ca and Mg during composting of manure. Total C in the manure reduced with composting days.

2

Half a century of research on diatoms in athalassic habitats in central Poland

Żelazna-Wieczorek J., Olszyński R. M., Nowicka-Krawczyk P.

Oceanological and Hydrobiological Studies

|

2015

|

Vol. 44, No. 1

51--67

EN

Part of the geology in the Łódź province was formed during the Upper Permian period when rich Zechstein salt was deposited. Groundwater drains the deposits and flows out in the village of Pełczyska, creating a unique hydrogeological site in Central Poland. An inland, athalassic ecosystem can be a reference site for halophile microflora. The outflow with surrounding marshes has been an algological research site since 1964. The research reveals changes recorded in diatom assemblages from athalassic habitats, characterized by a wide range of salinity levels, and verifies the tolerance of taxa to salinity. The comparative analysis was based on the diatom material sampled in 1964-1965, 1992-1994 and on recently collected samples. The analysis revealed the temporal change in assemblages caused by a change in the chloride concentration, and the spatial change from one to another habitat type, characterized by varying salinity levels. The halophilic species in the studied habitats included e.g. Halamphora dominici, H. tenerrima, Navicula digitoconvergens, N. meulemansii, Staurophora salina. The analysis of changes allowed the verification of the species’ requirements and tolerance range to the salinity factor. Therefore, in the case of Fragilaria famelica and Halamphora sydowii, we propose a change in the halobion system classification.

3

Phytoseston and heterotrophic bacteria in the assessment of the waters in the Wełna and Nielba Rivers

Messyasz B., Szczuka E., Kaznowski A., Burchardt L.

Oceanological and Hydrobiological Studies

|

2010

|

Vol. 39, No.4

45-63

EN

The phytoseston flora and heterotrophic bacteria from the two intersecting rivers were studied during the intensive water flow (from October 2006 to May 2007). The physical and chemical measurements indicated that the water quality in the rivers regarding their purity, had slightly improved in the Nielba River and deteriorated in the Wełna River, at the sites behind the intersection zone. It was in the agreement with the studied phytoseston diatom communities (dominated by eutraphentic taxa). Phytoplankton during the winter months was dominated by Aulacoseira granulata. The importance of species from the genera Oscillatoria, Planktolyngbya, Tychonema, Planktothrix, Scenedesmus/Desmodesmus, Nitzschia and Fragilaria increased in spring and autumn. Heterotrophic bacteria occurred in considerably higher numbers in the Wełna River than in the Nielba River, with a significant decrease in the waters of the Wełna River behind the river-intersection. All analyses revealed that the waters in the Wełna River were more polluted with organic compounds than in the Nielba River locations.

4

Wyniki badań nad lokalnymi zmianami pola magnetycznego Ziemi na lubelskim skłonie wschodnioeuropejskiego kratonu (profil Parczew - Chełm)

Bojdys G., Grabowska T., Wójcik A., Medoń Z.

Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie

|

2010

|

T. 36, z. 2

155-171

PL

Na tle budowy geologicznej lubelsko-podlaskiego skłonu kratonu wschodnioeuropejskiego (LPSK) przedstawiono rezultaty badań nad lokalnymi względnymi zmianami w czasie całkowitego pola magnetycznego Ziemi. Obiektem badań były wyniki pomiarów ziemskiego pola magnetycznego, wykonywanych w ciągu ostatnich 12 lat (1997-2008) w 20 punktach pomiarowych, zlokalizowanych wzdłuż profilu Parczew - Chełm. Na podstawie wartości ziemskiego pola magnetycznego wyznaczono względne zmiany czasowe tego pola. Zmiany te przedstawiono w formie wykresu oraz 2D i 3D odwzorowań, uwidoczniających ich związek z obrazem obserwowanych anomalii magnetycznych. Metodą 2D modelowania magnetycznego dokonano próby wyjaśnienia przyczyny lokalnych, względnych zmian pola magnetycznego, wiążąc to zjawisko ze zmianami wektora namagnesowania skał podłoża krystalicznego zachodzącymi pod wpływem zmieniającego się w czasie pola magnetycznego Ziemi.

EN

The local relative changes of the total intensity geomagnetic field in time are presented against the background of the geological structure of Lublin-Podlasie slope (LPSK) of the East European Craton. The research concerned measurement results of the total intensity (T) of the geomagnetic field, taken in the last 12 years (1997-2008) at 20 sites located along the Parczew - Chełm profile. Relative temporal changes of the geomagnetic field were determined on the basis of values of geomagnetic field calculated with reference to geomagnetic field measured at the base. These changes are presented as graphs, and in the form of space-time 2D and 3D representations, showing their relationship with the magnetic anomaly map. The cause of local relative changes was attempted to be explained by 2D magnetic modeling assuming that the changes of the induced magnetization of the basement crystalline rocks are result of the geomagnetic secular variations.

5

Lokalne zmiany czasowe pola magnetycznego Ziemi wzdłuż profilu Parczew-Chełm (wschodnia Lubelszczyzna)

Bojdys G., Grabowska T., Wójcik A.

Przegląd Geologiczny

|

2003

|

Vol. 51, nr 4

337--343

PL

Artykuł omawia wyniki 5-ciu serii pomiarowych (1997-001) pola magnetycznego Ziemi, prowadzonych w celu określenia jego względnych zmian czasowych (wyznaczonych w odniesieniu do lokalnego punktu bazowego) wzdłuż profilu Parczew-Chełm. Profil ten zlokalizowany jest na lubelskim skłonie wschodnioeuropejskiego kratonu (EEC) w obszarze obniżenia parczewskiego. Wyniki badań zestawione w formie wykresów potwierdzają wcześniej wysuniętą tezę (Małoszewski, Jankowski, 1997) o wolniejszym tempie zmian (wzrostu) ziemskiego pola magnetycznego w obszarze EEC w porównaniu ze zmianami tego pola w obrębie paleozoicznej platformy (PLZ). Zestawione w formie wykresów wartości lokalnych zmian pola magnetycznego wykazują widoczną korelację z budową geologiczną obszaru.

EN

The paper presents results of five series of geomagnetic field measurements along the Parczew-Chelm profile that were conducted in the period of 1997-2001 to evaluate temporal changes of the geomagnetic field relative to measurements in a local base located in the Włodawa Depression. The Parczew-Chelm profile stretches along the Lublin-Podlasie slope of the Eastern European Craton) EEC in the Parczew Trough. Investigation results, presented as plots, confirm an earlier hypothesis on the slower changes (increase) of the geomagnetic field in the EEC area as compared to the Paleozoic platform (PLZ). Local changes of the geomagnetic field correlate clearly with the geological structure of the region.