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Tytuł:
Mössbauer Investigation of Spin Arrangements in $Er_{2-x}Ce_xFe_{14}B$
Autorzy:
Bogacz, B.
Pędziwiatr, A.
Powiązania:
https://bibliotekanauki.pl/articles/1811580.pdf
Data publikacji:
2008-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.80.+y
75.25.+z
Opis:
It was theoretically postulated earlier that in compounds $Er_{2-x}Ce_{x}Fe_{14}B$ it may be possible to observe not only axial and planar spin arrangements but also a conical one. In order to experimentally verify this hypothesis, $\text{}^{57}Fe$ Mössbauer spectroscopy analysis was used to study the polycrystalline compounds $Er_{2-x}Ce_{x}Fe_{14}B$ in the postulated composition region (x = 1.0, 1.1, 1.2, 1.3) in the wide range of temperatures. The obtained experimental data do not clearly support the suggestion of conical arrangement occurrence in the postulated compositions. They indicate that such phenomenon may be shifted towards higher Ce content.
Źródło:
Acta Physica Polonica A; 2008, 114, 6; 1509-1516
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spin arrangement diagrams for Er2-xRxFe14B (R = Y, Ce) obtained with Mössbauer spectroscopy and phenomenological model
Autorzy:
Pędziwiatr, A.
Bogacz, B.
Gargula, R.
Powiązania:
https://bibliotekanauki.pl/articles/148797.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Mössbauer effect
permanent magnet materials
spin diagrams
spin reorientation
Opis:
Two isostructural series of polycrystalline compounds: Er2-xYxFe14B and Er2-xCexFe14B have been studied by 57Fe Mössbauer spectroscopy in the temperature range 80-370 K. The spin reorientation phenomenon (a transition from basal plane to axial easy magnetisation direction) has been studied extensively by a narrow step temperature scanning in the vicinity of the transition. Using the procedure of subtracting the Mössbauer spectra taken for the same compound at different temperatures, it was possible to follow the influence of transition on the shape of spectra. From this procedure it was concluded that in the region of transition each subspectrum splits into two Zeeman sextets, which are characterised by different hyperfine magnetic fields and quadrupole splittings. The consistent way of describing the Mössbauer spectra was proposed. The spin reorientation temperatures have been established for all compositions and compared with the values obtained from theoretical calculations of spin orientation angle based on phenomenological model. The spin arrangement diagrams have been constructed.
Źródło:
Nukleonika; 2003, 48,suppl.1; 59-63
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variableloading conditions and consequences for wave phenomena
Zmienność obciążeń i skutki w zakresie propagacji fal
Autorzy:
Bogacz, B.
Frischmuth, K.
Konowrocki, R.
Powiązania:
https://bibliotekanauki.pl/articles/254156.pdf
Data publikacji:
2015
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
mechanics of rail vehicles
waves
wave propagation
mechanika pojazdów szynowych
fale
propagacja fal
Opis:
In land transport, we observe an increase of loads as well as of speeds of travel, which leads to considerable stresses and strains in constructions like tracks, bridges and tunnels. The wave propagation caused by constant and harmonic loads moving at constant speed along straight lines has been well covered in the recent literature. Problems including other types of variable loading conditions are much less understood. In the article, some problems of this type are posed and discussed together with applications in vehicle mechanics. In particular, motion of out-of-the-round wheels on rails and some problems of brake disk dynamics are presented.
W transporcie lądowym, zwłaszcza szynowym, obserwuje się tendencję do coraz wyższych prędkości i większych obciążeń, skąd wynikają między innymi znaczne naprężenia wtakich konstrukcjach jak szyny, mosty i tunele.Efekty falowe z tym związane dobrze są zbadane w przypadku stałych prędkości ruchu prostolinijnego i harmonicznych obciążeń. Zagadnienia uwzględniające innego typu zmienności sił czy warun-ków brzegowych dotąd nie znalazły odpowiednio dużo uwagi w literaturze. W obecnej pracy kilka zadań tej klasy zostało postawionych i przedyskutowanych, między innymi problem związany z kołami skorugowanymi i problem dynamiki dysku hamulcowego jako przykłady z zakresu mechaniki pojazdów szynowych.
Źródło:
TTS Technika Transportu Szynowego; 2015, 12; 168-171, CD
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mössbauer studies of spin reorientations in Er2-xGdxFe14B
Autorzy:
Wojciechowska, A.
Bogacz, B.
Pędziwiatr, A.
Powiązania:
https://bibliotekanauki.pl/articles/147233.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Mössbauer effect
spin reorientation
Opis:
The Er2 xGdxFe14B (x = 0.5, 1.0, 1.5) polycrystalline compounds have been investigated with 57Fe Mössbauer spectroscopy in the 80 330 K temperature range. The spin reorientation phenomena (changes from planar to axial spin arrangements) have been studied extensively by a narrow step temperature scanning in the neighbourhood of the spin reorientation temperature. From the analysis of the spectra it was deduced that in the region of transition each subspectrum was split into two Zeeman sextets, which were characterized by different hyperfine magnetic fields and quadrupole splittings. A consistent way of describing the Mössbauer spectra in the wide range of temperatures was proposed. The composition and temperature dependencies of hyperfine interaction parameters and subspectra contributions were derived from experimental spectra. The transition temperatures were determined for all the compounds studied.
Źródło:
Nukleonika; 2004, 49,suppl.3; 71-73
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crystal electric field parameters determination for R2Fe14B compounds based on Yamada - Kato model
Autorzy:
Bogacz, B. F.
Pędziwiatr, A. T.
Powiązania:
https://bibliotekanauki.pl/articles/147342.pdf
Data publikacji:
2013
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
crystal electric field parameters
model Yamada-Kato
Mössbauer effect
permanent magnet materials
spin reorientation
Opis:
Semi-empirical model developed by Yamada-Kato enables calculation of magnetic spin directions for R2Fe14B compounds, based on minimization of free energy, and - in further steps - determination of spin reorientation temperatures for transitions from basal plane to axial easy magnetization direction. In our study, this model has been successfully used to determine crystal field and exchange field parameters for Er2-xCexFe14B compounds based on spin reorientation temperatures obtained experimentally from Mössbauer measurements.
Źródło:
Nukleonika; 2013, 58, 1; 31-33
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spin reorientation phenomena in Er2-xRxFe14B (R = Gd, Th) – Mössbauer and calorimetric study
Autorzy:
Wojciechowska, A.
Pędziwiatr, A.
Bogacz, B.
Wróbel, S.
Powiązania:
https://bibliotekanauki.pl/articles/148335.pdf
Data publikacji:
2007
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Mössbauer effect
spin reorientation
Opis:
The Er2 xGdxFe14B (x = 0.5, 1.0, 1.5) and Er2 xThxFe14B (x = 0.0, 0.5, 1.0, 1.5, 2.0) polycrystalline compounds have been investigated with 57Fe Mössbauer spectroscopy and differential scanning calorimetry (DSC). A comparison of results related to spin reorientation phenomena obtained for Gd- and Th-substituted compounds is presented in this paper. Spin reorientation phenomena (changes from planar to axial spin arrangements) have been studied extensively by a narrow step temperature scanning in the neighbourhood of the spin reorientation temperature, TSR. From the analysis of Mössbauer spectra, it was deduced that in the region of transition each subspectrum was split into two Zeeman sextets, which were characterised by different hyperfine magnetic fields and quadrupole splittings. A consistent way of fitting the spectra in the wide range of temperatures was proposed. The composition and temperature dependencies of hyperfine interaction parameters and subspectra contributions were derived from fits and the transition temperatures were determined for all the compounds studied. DSC studies proved that the spin reorientations were accompanied by thermal effects for all compositions of the Gd- and for x = 0.5 of the Th-series. Transformation enthalpy and TSR were determined from these studies and the two-stage character of transition was confirmed. Magnetic spin arrangement diagrams for R = Th and Gd series were constructed and compared using combined data obtained with both methods.
Źródło:
Nukleonika; 2007, 52, supl. 1; 77-79
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mössbauer and Magnetometric Studies of Spin Reorientations in Er$\text{}_{2-x}$Th$\text{}_{x}$Fe$\text{}_{14}$B
Autorzy:
Wojciechowska, A.
Bogacz, B. F.
Pędziwiatr, A. T.
Powiązania:
https://bibliotekanauki.pl/articles/2046203.pdf
Data publikacji:
2006-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.80.+y
75.25.+z
Opis:
The Er$\text{}_{2-x}$Th$\text{}_{x}$Fe$\text{}_{14}$B (x=0.5, 1.0, 1.5) polycrystalline compounds have been investigated with $\text{}^{57}$Fe Mössbauer spectroscopy in the 50-330 K temperature range and magnetometry in the temperature range of 4.2-340 K. Initial magnetization vs. temperature measurements allowed us to establish the temperature regions of reorientations and also the Curie temperatures of the compounds. The spin reorientation phenomena (changes from planar to axial spin arrangements) have been studied extensively by a narrow step temperature Mössbauer scanning in the vicinity of the spin reorientation temperatures. From the analysis of the obtained Mössbauer spectra it was deduced that in the region of transition each subspectrum was split into two Zeeman sextets, which were characterised by different hyperfine magnetic fields and quadrupole splittings. A consistent way of describing the Mössbauer spectra in the wide range of temperatures was proposed. The composition and temperature dependences of hyperfine interaction parameters and subspectra contributions were derived from experimental spectra. The transition temperatures were determined for all the compounds studied and the spin phase diagram was constructed.
Źródło:
Acta Physica Polonica A; 2006, 109, 3; 427-432
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spin Reorientation Studies in Nd$\text{}_{2}$Fe$\text{}_{14-x}$Si$\text{}_{x}$B (0
Autorzy:
Gargula, R.
Pędziwiatr, A.
Bogacz, B.
Wróbel, S.
Bartolomé, J.
Stankiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/2030427.pdf
Data publikacji:
2002-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Ww
76.80.+y
64.60.-i
Opis:
Nd$\text{}_{2}$Fe$\text{}_{14-x}$Si$\text{}_{x}$B (x=0.25, 0.5, 0.75, 1.0, 1.5, 2.0) intermetallic compounds were investigated by magnetometry, $\text{}^{57}$Fe Mössbauer effect, electric resistivity, and differential scanning calorimetry mainly in the vicinity of the spin reorientation temperature, T$\text{}_{SR}$. The Curie temperature, T$\text{}_{C}$, and T$\text{}_{SR}$ were determined for different compositions and the spin phase diagram was constructed. $\text{}^{57}$Fe Mössbauer spectra showed noticeable changes in the reorientation region. For temperatures above the transition, the spectra were analysed using 6 Zeeman patterns associated with 6 inequivalent crystal sites in Nd$\text{}_{2}$Fe$\text{}_{14}$B according to site occupations (16k$\text{}_{1}$:16k$\text{}_{2}$:8j$\text{}_{1}$:8j$\text{}_{2}$:4c:4e). In the transition region, 12 subspectra had to be incorporated in the analysis. Electric resistivity measurements showed a typical metallic behaviour with no anomalies in the magnetic transition region. Differential scanning calorimetry measurements revealed broad endothermic two stage peaks around T$\text{}_{SR}$.
Źródło:
Acta Physica Polonica A; 2002, 101, 2; 289-294
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Search for canted spin arrangement in Er2-xTbxFe14B with Mössbauer spectroscopy
Autorzy:
Kurzydło, P. M.
Bogacz, B. F.
Pędziwiatr, A. T.
Oleszak, D.
Przewoźnik, J.
Powiązania:
https://bibliotekanauki.pl/articles/147036.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Mössbauer effect
permanent magnet materials
spin diagrams
spin reorientation
Opis:
The materials studied were polycrystalline compounds Er2-xTbxFe14B (x = 0.1, 0.2, 0.3, 0.4) which crystallize in a tetragonal lattice and display a variety of spin arrangements. The compounds have been measured with 57Fe Mössbauer spectroscopy over the temperature range 80–320 K in order to investigate the spin reorientation processes. Each compound was studied in a wide temperature range, with precise Mössbauer scanning in the vicinity of the transition. The set of spectra obtained for a given compound was analyzed using simultaneous fi tting procedure to investigate the infl uence of the transition on the shape of the spectra. The fi tting program was specifi ed to analyze the transition according to the ‘two state model’: spins fl ip abruptly from initial angle to fi nal arrangement (90° angle). Obtained results suggest that spin reorientation process cannot be described using only the mentioned above model. Additional computer simulations based on the Yamada–Kato model were conducted to determine temperature range and the type of spin alignments in the vicinity of the transition. These theoretical results supported by spectra analysis suggest the existence of intermediate (canted) spin arrangements in the studied compounds. The spin arrangement diagram was constructed.
Źródło:
Nukleonika; 2015, 60, 1; 93-96
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spin reorientation process in Tm2–xHoxFe14B : analysis of conical arrangement based on Mössbauer spectra
Autorzy:
Kurzydło, P. M.
Pędziwiatr, A. T.
Bogacz, B. F.
Przewoźnik, J.
Oleszak, D.
Powiązania:
https://bibliotekanauki.pl/articles/148120.pdf
Data publikacji:
2017
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
permanent magnetic materials
Mössbauer effect
spin reorientation
spin diagrams
Opis:
The spin reorientation process in the Tm2–xHoxFe14B series of compounds was studied using 57Fe Mössbauer spectroscopy over the temperature range 5.2–320 K with a focus on the analysis of conical spin arrangement. Each compound was studied by precise Mössbauer scanning in the vicinity of the transition and during the transition. By applying computer simulations based on the simplified Yamada-Kato model, as well as on some literature data for R2Fe14B (R = Tm, Ho) compounds, the above series was selected for studies as it contains compounds with different spin arrangements (axial, planar, conical). It was a crucial requirement for obtaining unambiguous angular dependences when applying a simultaneous fitting procedure of Mössbauer spectra. Such an extended procedure was applied which allowed the temperature dependence of the angle describing the position of the magnetization vector to be obtained. The results were compared with those from theoretical simulations. The spin arrangement diagram was constructed. A conical spin arrangement was confirmed over a wide temperature range.
Źródło:
Nukleonika; 2017, 62, 2; 123-127
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Carbon on Spin Reorientation Processes in $Er_{2-x}R_xFe_{14}C$ (R~=~Gd, Pr) - Mössbauer and Magnetometric Studies
Autorzy:
Pędziwiatr, A.
Krawiec, K.
Bogacz, B.
Kapusta, Cz.
Przewoźnik, J.
Kaczorowski, D.
Talik, E.
Powiązania:
https://bibliotekanauki.pl/articles/1506592.pdf
Data publikacji:
2011-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.80.+y
75.25.-j
75.50.-y
75.50.Bb
Opis:
The $Er_{2-x}R_{x}Fe_{14}C$ (R=Gd, Pr) polycrystalline compounds have been synthesized and investigated with $\text{}^{57}Fe$ Mössbauer spectroscopy and magnetic measurements. The spin reorientation phenomena were studied extensively by narrow step temperature scanning in the neighborhood of the spin reorientation temperature. Obtained Mössbauer spectra were analyzed using a procedure of simultaneous fitting and the transmission integral approach. Consistent description of Mössbauer spectra were obtained, temperature and composition dependencies of hyperfine interaction parameters and subspectra contributions were derived from fits and the transition temperatures were determined for all the compounds studied. Initial magnetization versus temperature measurements (in zero and non-zero external field) for $Er_{2-x}Gd_{x}Fe_{14}C$ compounds allowed to establish the temperature regions of reorientation, change of magnetization value during the transition process. The results obtained with different methods were analyzed and the spin arrangement diagrams were constructed. Data obtained for $Er_{2-x}Gd_{x}Fe_{14}C$ were compared with those for $Er_{2-x}Gd_{x}Fe_{14}B$ series.
Źródło:
Acta Physica Polonica A; 2011, 119, 1; 48-51
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane metody przyspieszenia uzyskania wyniku pomiaru stężenia gazu w stanach nieustalonych
Selected methods for acceleration of measurements of gas concentration in transient states
Autorzy:
Bogacz, R.
Krupanek, B.
Powiązania:
https://bibliotekanauki.pl/articles/157596.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
metan
pelistor
korekcja
odtwarzanie
dynamika
methane
pellistor
correction
recovery
dynamics
Opis:
Celem pracy jest przedstawienie wybranych metod umożliwiających przyspieszenie uzyskania wyniku pomiaru stężenia metanu za pomocą pelistorowych czujników metanu w osłonach ognioszczel-nych w stanach nieustalonych. Do porównania wybrano metodę korekcji dynamicznej wykorzystującej algorytm odtwarzania oraz metodę korekcji „w ciemno” wykorzystującą różnice w dynamice dwóch różnych czujników.
Due to the significant threat to safety of life and property of people in coal mines it is important to measure the concentration of methane. It can change rapidly and significantly, reaching explosive levels as a result of the so-called guilty of methane. Pellistor sensors in flameproof enclosures are commonly used for measuring the methane concentration. The housing protects the sensor against mechanical damages and, at the same time, ensures the compliance with the requirements of intrinsic safety, essential for sensors operating on the principle of catalytic combustion. Due to the unrestrained flow of gas through the conduit, the methane diffusion proceeds in a manner sufficiently rapid. The aim of this work is to show methods that allow accelerating obtaining the results of the concentration of methane out of the flameproof enclosures of pellistor sensors. The study focused on two selected correction methods: the dynamic correction algorithm using a dynamic recovery algorithm and the “blind” correction method using the differences in the dynamics of two different sensors.
Źródło:
Pomiary Automatyka Kontrola; 2014, R. 60, nr 1, 1; 26-30
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Koncepcja rozproszonego systemu kontroli zanieczyszczeń powietrza bazującego na technologii Internetu Rzeczy
The concept of distribution system for air pollution control based on the Internet of Things technology
Autorzy:
Bogacz, R.
Krupanek, B.
Powiązania:
https://bibliotekanauki.pl/articles/268354.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
zanieczyszczenie powietrza
Internet Rzeczy
transmisja bezprzewodowa
czujniki gazu
air pollution
Internet of Things
wireless transmission
gas sensors
Opis:
Zanieczyszczenie powietrza, to coraz poważniejszy problemem. Jednym z rozwiązań mogących wpłynąć na poprawę jakości powietrza jest ciągłe monitorowanie jego stanu. W celu wykrycia źródeł zanieczyszczeń należy kontrolować podstawowe parametry składu powietrza na rozległym terenie. Rozwiązaniem problemu może być użycie technologii Internetu Rzeczy. Rozproszona sieć czujników pomiarowych monitorujących stan powietrza w sposób ciągły komunikująca się z Internetem w sposób bezprzewodowy umożliwi przekazywanie na bieżąco informacji o rozprzestrzenianiu się zanieczyszczeń. W artykule przedstawiono koncepcję rozproszonego systemu do kontroli stanu powietrza.
Air pollution is an increasingly serious problem. One of the ways to improve air quality is to constantly monitor its condition. In order to detect pollution sources, it is necessary to control the basic parameters of air composition on a large area. The solution to the problem may be the use of Internet of Things technology. A distributed network of sensors that communicates with the Internet in a wireless way will enable the transmission of information on the spread of pollution on an ongoing basis. The article presents the concept of a distributed system for air condition monitoring.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2018, 59; 13-16
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic Error Correction of Methane Sensor
Autorzy:
Krupanek, B.
Bogacz, R.
Powiązania:
https://bibliotekanauki.pl/articles/227009.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dynamic error correction
methane sensor
pellistor sensor
safety in mine
Opis:
Coal mine methane is a term given to the methane gas produced or emitted in association with coal mining activities either from the coal seam itself or from other gassy formations underground. The primary reason for measuring methane is to improve the safety of the mines. In recent years, there have been many fatalities in underground coal mine explosions in which methane was a contributing factor. The rapid detection of methane is very important from the point of view of safety of mine workers. This paper presents a concept of fast methane detection by reconstituting its concentration in dynamic states.
Źródło:
International Journal of Electronics and Telecommunications; 2014, 60, 4; 287-289
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concentration and pools of trace elements in organic soils in the Izera Mountains
Koncentracja i zasoby pierwiastków śladowych w glebach organicznych z obszaru Gór Izerskich
Autorzy:
Glina, B.
Bogacz, A.
Powiązania:
https://bibliotekanauki.pl/articles/15046.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
Concentrations of trace elements in organic soils are a result of natural accumulation or due to anthropogenic factors. A field study was carried out in May 2008 on selected sites in the Izera Mountains. Soil samples were collected from 8 profiles of organic soils. Four soil profiles were located on the plateau meadow called Hala Izerska, at the altitude of 835-850 m a.s.l. The other 4 profiles were located in the mountain range known as the Grzbiet Wysoki, at 909-990 m a.s.l. The concentration and pools of heavy metals were determined according to the elevation, depth in soil profile, content of organic matter and soil pH. The content of trace elements (Pb, Cu, Zn) was determined after wet mineralization of samples in nitric acid, using a Flame Atomic Absorption Spectrometer. Pools of trace elements were recalculated into g m–2 in the 0-30 cm layer of soil. The aim was to determine the influence of altitude on concentrations of trace elements in organic soils profiles. Organic soils from the Grzbiet Wysoki and Hala Izerska showed significant contamination, mainly with lead and zinc. The elements were most abundant in surface horizons. With an increasing depth into the soil profile, the content of trace elements decreased. The arithmetic means showed strong dominance of lead on zinc and copper in the examined profiles. The Grzbiet Wysoki, due to its higher location above the sea level, is more exposed to atmospheric deposition of contaminants than Hala Izerska. However, the concentration of Cu is higher in organic soils from Hala Izerska. Statistical analysis showed significant positive correlation between the Pb concentration and altitude. With an increasing altitude, the content of Pb in soil also increased. Zinc and lead correlate highly negatively with the depth into the soil profile. With an increasing depth, the content of these elements decreases.
Źródło:
Journal of Elementology; 2013, 18, 2
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 51

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