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Wyświetlanie 1-15 z 18
Tytuł:
Geochemical fractionation of heavy metals in sediments of the Red Sea, Saudi Arabia
Autorzy:
Al-Mur, B.A.
Powiązania:
https://bibliotekanauki.pl/articles/48293.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
geochemistry
heavy metal
surface sediment
speciation
bioavailability
sediment
Red Sea
Saudi Arabia
Źródło:
Oceanologia; 2020, 62, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the burial rate estimation methods of organic and inorganic carbon and quantification of carbon burial in two high Arctic fjords
Autorzy:
Koziorowska, K.
Kulinski, K.
Pempkowiak, J.
Powiązania:
https://bibliotekanauki.pl/articles/47711.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
organic carbon
inorganic carbon
marine sediment
pore water
Arctic fjord
surface sediment
primary production
absorption spectrum
Źródło:
Oceanologia; 2018, 60, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution of metals and extent of contamination in sediments from the South-Eastern Baltic Sea (Lithuanian zone)
Autorzy:
Remeikaite-Nikiene, N.
Garnaga-Budre, G.
Lujaniene, G.
Joksas, K.
Stankevicius, A.
Malejevas, V.
Bariseviciute, R.
Powiązania:
https://bibliotekanauki.pl/articles/49066.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
metal distribution
surface sediment
pollution source
enrichment factor
geoaccumulation index
contamination factor
Baltic Sea
Lithuania
Curonian Lagoon
Źródło:
Oceanologia; 2018, 60, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Horizontal and vertical distribution of lignin in surface sediments of the Gdańsk Basin
Autorzy:
Staniszewski, A.
Lejman, A.
Pempkowiak, J.
Powiązania:
https://bibliotekanauki.pl/articles/47928.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
oxidation provenience
organic matter
surface sediment
vertical distribution
accumulation area
Baltic Sea
Vistula River
Gdansk Basin
horizontal distribution
lignin
Opis:
The aim of this study was to identify and quantify lignin transported from the River Vistula to the accumulation area in the Gdańsk Basin. Sediment samples collected along the Vistula mouth –Gdańsk Deep transect were analysed for lignin. Lignin was characterised by oxidative degradation, cupric oxide being chosen as the most suitable oxidising agent. The polar functional groups of the oxidation products were silylated and the derivatives analysed by capillary gas chromatography on fused capillary silica columns with flame ionisation detection. Lignin-derived oxidation products were quantified in the range from 3 to 20 μg g−1 dry wt. for phenolic acids and from 6 to 12 μg g−1 dry wt. for phenolic aldehydes. Differences in oxidation products contents are assigned to different lignin sources in the marine environment. The horizontal and vertical gradients of these compounds in the sediments of the Gdańsk Basin are documented. The results are discussed in terms of the origin and fate of organic matter in the Gdańsk Basin. The measured differences in quality and quantity of the identified oxidation products provide insight into diagenetic processes in the surface marine sediments.
Źródło:
Oceanologia; 2001, 43, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial distribution of biological and physical sediment parameters in the Western Gulf of Gdansk
Autorzy:
Huzarska, K.
Powiązania:
https://bibliotekanauki.pl/articles/48994.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
spatial distribution
surface sediment
physical property
biological activity
microphytobenthos
primary production
extracellular polymeric substance
chlorophyll a concentration
carbohydrate concentration
Źródło:
Oceanologia; 2013, 55, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mineralogical and chemical composition of the mud fraction from the surface sediments of Sharm Al-Kharrar, a Red Sea coastal lagoon
Autorzy:
Basaham, A.S.
Powiązania:
https://bibliotekanauki.pl/articles/48257.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Sharm Al-Kharrar
mineralogical composition
trace element
chemical composition
mud fraction
Red Sea
surface sediment
tropical marine habitat
coastal lagoon
Opis:
Interaction between continental and marine end-members gives rise to the natural biogeochemical processes in Sharm Al-Kharrar, a lagoon in the arid Red Sea region. Twenty-nine surface sediment samples were collected from the area and their mud fraction analysed for grain size, OC, CaCO3, mineralogy and elemental composition. The mud fraction consisted of a mixture of siliciclastic/calcareous materials, dominated by silt size materials and characterised by low OC (average 0.71% ±0.13); CaCO3 varied widely, with an average of 45% ±18. Concentrations of Al, Fe, Mn, Cu, Ni, Cr, V and Ba showed a wide range of variation throughout the Sharm. The results were normalised to Al and subjected to cluster analysis in order to examine the relations between the mineralogy and the elemental composition. The contents of Al, Fe, Mn, Cu, Ni, Cr, V and Ba appeared to be influenced by the mixing of the two end-members in addition to the physiochemical processes associated with the mixing between episodic freshwater flooding and seawater. Zn was the single element that showed a slight departure from the mixing model.
Źródło:
Oceanologia; 2008, 50, 4; 557-575
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Occurrence and germination of dinoflagellate cysts in surface sediments from the Red Sea off the coasts of Saudi Arabia
Autorzy:
Mohamed, Z.A.
Al-Shehri, A.M.
Powiązania:
https://bibliotekanauki.pl/articles/48723.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
occurrence
germination
dinoflagellate cyst
cyst
Red Sea
Saudi Arabia
coast
toxic species
distribution
abundance
surface sediment
organic carbon
silt
clay
Cochlodinium polykrikos
Prorocentrum minimum
Dinophysis
acuminata
Alexandrium catenell
Scrippsiella trochoidea
Opis:
The distribution and abundance of dinoflagellate cyst assemblages were investigated in surface sediments from south-western Red sea coasts of Saudi Arabia at six sites during March 2010. A total of 19 taxa of dinoflagellate cysts were identified from all sites. The sampling sites showed a similar cyst assemblage, but they differed in total cyst abundance (3 to 4083 cysts g−1 dry weight). Cyst abundance was strongly correlated with sediment characteristics, the highest numbers being recorded in sediments with large contents of organic carbon, silt and clay. Cyst assemblages were dominated by cysts of potentially toxic species, including Cochlodinium polykrikos, Prorocentrum minimum, Dinophysis acuminata, Alexandrium catenella and Scrippsiella trochoidea. Most cysts germinated successfully at different rates at 15 and 25◦C. This study suggests that surface sediments from all Saudi Red Sea coasts should be monitored for the presence of dinoflagellate cysts to give ample warning of the presence and abundance of toxic species in a given area.
Źródło:
Oceanologia; 2011, 53, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spectral structure of surface waves and its influence on sediment dynamics
Autorzy:
Divinsky, B.V.
Kosyan, R.D.
Powiązania:
https://bibliotekanauki.pl/articles/48773.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
wave energy
frequency distribution
concentration profile
frequency domain reflectometry
bottom sediment
sediment dynamics
surface wave
Źródło:
Oceanologia; 2019, 61, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of Changes in the Concentration of Oil Products in the Tura River within the Residential Area of the Large Oil Capital of Russia
Autorzy:
Kryakhtunov, Alexander V.
Powiązania:
https://bibliotekanauki.pl/articles/2028106.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
hydrosphere
surface water
bottom sediment
oil product
oil pollution
runoff
Opis:
In the course of the study, the following tasks were solved: determining the level of oil products and their spatial distribution in surface waters and bottom sediments of the Tura River, studying the features of the accumulation of oil products in bottom sediments in different sections of the Tura River, as well as the effect of storm and melt water contaminated with oil products within the coastal boundaries on the general background of pollution, calculated by the approximation method the distance at which the maximum permissible concentration for the Tura River would be reached, gave recommendations on the preservation of the object under study. The research was carried out in the laboratory of the Tyumen Industrial University. The analysis of samples for the content of oil products was carried out by the fluorometric method on a fluid analyzer “Fluorat-02–2M”. The results of the study indicate the need to monitor surface waters and toughly respond to insufficient compliance with the standards for the protection of surface waters and bottom sediments within the city of Tyumen.
Źródło:
Journal of Ecological Engineering; 2021, 22, 11; 223-229
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The morphology of fossil pebbles as a tool for determining their transport processes (Koźmin South lignite open-cast pit, central Poland)
Autorzy:
Widera, M.
Powiązania:
https://bibliotekanauki.pl/articles/191884.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
pebble morphology
shape
surface texture
sediment provenance
transport processes
Central Poland
Opis:
The Koźmin South lignite open-cast pit is the southernmost exposure of Palaeogene (lower Oligocene) deposits in central Poland. This study is focused on Palaeogene pebbles of the so-called Koźmin Gravels, rede- posited in the Neogene sands. These pebbles are not known from the adjacent territory of central Poland and they vary in petrographic composition, shape and surface texture. The classification of the pebble-size particle form is determined as DI/DL (elongation ratio) and DS/DI (flatness ratio). A great number of pebbles are disc-shaped (oblate-shaped) and blade-shaped or they can be classified as platy, bladed and very bladed pebbles. The oblate-prolate index (OP) is less than -2 for 45% of the particles (typical of beach pebbles), the mean sphericity (yp) is 0.56 (typical of beach pebbles), and the mean roundness (RWt) is 0.73 (typical of beach pebbles). The data obtained from SEM analysis of quartz pebble surface micromorphology are characteristic of high mechanical energy of the littoral environment. The surface of some pebbles is excellently polished with v-shaped indentations and grooves. The average composition of the heavy mineral fraction occurring with these pebbles is marked by the predominance of zircon (exceeding 70%). All the above-mentioned data, in the light of extensive literature, indicate that more morphological features of the analysed pebbles have been inherited from the littoral/beach environment. Moreover, a detailed petrographic study was very useful for determining the prove-nance of these pebbles. The most characteristic rocks are greyish-blue quartzes. They are known only from the Sudetes Mts., situated on the NE slope of the Bohemian Massif. Thus, the rock fragments were transported at least 300 km by rivers from the Sudetes to the littoral/beach zone of the Palaeogene sea. Then, the residually-marine beach pebbles were redeposited into the Neogene debris flow and/or fluvial deposits. The present-day area of the Koźmin South lignite open-cast pit was tectonically active at that time.
Źródło:
Annales Societatis Geologorum Poloniae; 2010, 80, No 3; 315-325
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heavy metals in beach deposits, bottom sediments of a Baltic fishing port and surface water
Metale ciężkie w osadach plażowych, osadach dennych oraz w wodzie powierzchniowej bałtyckiego portu rybackiego
Autorzy:
Antonowicz, J.P.
Grobela, M.
Opalinska, M.
Motala, R.
Powiązania:
https://bibliotekanauki.pl/articles/85185.pdf
Data publikacji:
2017
Wydawca:
Akademia Pomorska w Słupsku
Tematy:
heavy metal
beach deposit
bottom sediment
Baltic Sea
fishing port
surface water
Opis:
Concentrations of metals, i.e. As, Cd, Cu, Mn, Ni, Pb, Zn were analysed in bottom deposits of a marine port in Ustka and within the adjacent beach sections. Metal concentrations within the port channel may be ordered in terms of increasing values as: Cd < As < Ni < Zn < Cu < Pb < Mn. Heavy metal concentrations detected in port sediments were much higher than those in beach deposits. Samples of surface waters were also collected from the port channel, harbour basins and nearby beaches and selected physico-chemical indexes were determined, including heavy metal concentrations.
Wykonano analizy stężenia metali As, Cd, Cu, Mn, Ni, Pb, Zn w osadach dennych portu morskiego w Ustce oraz w sąsiadujących odcinkach plaży. Stężenia metali w obszarze kanału portowego tworzyły stężeniowy szereg rosnący: Cd < As < Ni < Zn < Cu < Pb < Mn. Uzyskane stężenia metali ciężkich w osadach portowych były znacznie wyższe niż w osadach plażowych. Z kanału portowego, basenów portowych oraz w pobliżu plaż pobrano również próbki wody powierzchniowej, w których przeanalizowano stężenie wybranych parametrów fizykochemicznych, w tym metali ciężkich.
Źródło:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2017, 21
1643-0115
Pojawia się w:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Water erosion and supply of material for fluvial transport under episodic surface flow conditions in the semi-arid zone on Boa Vista (Cabo Verde)
Autorzy:
Gierszewski, P.
Rodzik, J.
Powiązania:
https://bibliotekanauki.pl/articles/294512.pdf
Data publikacji:
2003
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
surface flow
water erosion
suspended sediment
dissolved materia
semi-arid
Cabo Verde
Opis:
This paper presents the effects of the natural conditions of the semi-arid zone on the tem-poral and spatial variability of production and supply of material for fluvial transport under conditions of episodic surface flow. Based on measurements of water runoff, concentration of suspension and dissolved material in the course of a one-hour rainfall, it has been determined that the catchments under study have a considerable resistance to the effects of water erosion. Some protection is supplied by the ablation pavement, which reduces rainsplash and slopewash and prevents flow concentration. Consid-erably more erosion has been noted on unpaved roads concentrating water flow even on plateaux and gently inclined slopes. Obviously the potential for leaching rock material in short-duration flow is limited. Large proportions of the dissolved material carried away from the catchments are salts of marine and aeolian provenance. The high intensity of erosional processes in the early phase of runoff is evidence of the role of physical weathering between rainfalls, which supplies the material for fluvial transport.
Źródło:
Landform Analysis; 2003, 4; 49-58
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Soil erosion control in immature oil palm plantation
Autorzy:
Satriawan, Halus
Fuady, Zahrul
Fitri, Rini
Powiązania:
https://bibliotekanauki.pl/articles/1844320.pdf
Data publikacji:
2021
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
cover crops
erosion
nutrient leaching
oil palm plantation
sediment trap
surface runoff
terraces
Opis:
The objectives of developing oil palm plantations should feasible economically and without causing massive erosion. This research proposes soil and water conservation strategies that are ideal and optimal for oil palm cultivation depending on land capability class. The conservation test for plants was performed according to land capability classes on a plot measuring 22 m × 4 m. Runoff and erosion rates were measured using Multislot Divisor Method. Nutrient leaching was analysed based on the content of C-organic (Ctot) (Walkley–Black method), total nitrogen (Ntot) (Kjeldahl method), P-available (Bray-1 method) and K2O (extraction with 1N NH4OAc at pH 7.0). From the results, land capability class III, cover crops (soybean) + manure (P3) treatment effectively reduced runoff and soil erosion (22.63 m3∙ha–1∙y–1 and 13.04 Mg∙ha–1∙y–1), as well as nutrient leaching, compared to other treatments. Furthermore, sediment trap + cover crop + manure (P3) controlled runoff, erosion and nutrient leaching on land capability class IV, producing the lowest runoff (129.40 m3∙ha–1∙y–1), soil erosion (11.39 Mg∙ha–1∙y–1), C-organic (1.3%), and P (1.95 mg kg–1). Soil conservation treatment significantly reduced erosion and runoff (p < 0.05) on land capability class VI. The bench terrace + cover plants + manure treatment-controlled runoff, erosion, and soil nutrient leaching.
Źródło:
Journal of Water and Land Development; 2021, 49; 47-54
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reconsidering the glaciogenic origin of Gondwana diamictites of the Dwyka Group, South Africa
Autorzy:
Molén, Mats O.
Smit, J. Johan
Powiązania:
https://bibliotekanauki.pl/articles/2204360.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
surface microtexture
sediment gravity flows
Late Palaeozoic Ice Age
pavement
Nooitgedacht
mikrotekstura powierzchni
osad
epoka lodowcowa
nawierzchnie
Opis:
The Gondwana Late Palaeozoic Ice Age is probably best represented by the Dwyka Group in South Africa. Striated and grooved surfaces or pavements are commonly considered to have formed subglacially, as are diamictites which have been interpreted as in-situ or reworked tillites. These interpretations were tested by investigation of outcrops in formerly well-studied areas, throughout South Africa. Detailed analyses have focused on striated surfaces/pavements and surface microtextures on quartz sand grains in diamictites. The sedimentological context of four pavements, interpreter to be glaciogenic, display features commonly associated with sediment gravity flows, rather than glaciation. A total of 4,271 quartz sand grains were subsampled from outcrops that are considered mainly to be tillites formed by Continental glaciation. These grains, analysed by SEM, do not demonstrate the characteristic surface microtexture combinations of fracturing and irregular abrasion associated with Quaternary glacial deposits, but mainly a mix of surface microtextures associated with multicyclical grains. The Dwyka Group diamictites warrant reinterpretation as non-glacial sediment gravity flow deposits.
Źródło:
Geologos; 2022, 28, 2; 83--113
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Spatial Distribution of Heavy Metal Lead and Cadmium Pollution and Coliform Abundance of Waters and Surface Sediment in Demak
Autorzy:
Tjahjono, A.
Suwarno, D.
Powiązania:
https://bibliotekanauki.pl/articles/124961.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Demak waters
spatial distribution of Pb
spatial distribution of Cd
surface water
sediment
abundance of Coliform
water pollution index
Opis:
Various activities such as farming, industry, household waste, fish pond, and fishery can possibly affect the estuarine and coastal ecosystem. Demak waters, located to the east of Tanjung Emas Semarang, become an influential element of fishery industry that mostly produces anchovies and shrimps. This research was aimed at (1) analyzing the spatial distribution of heavy metal Pb and Cd in the surface water and sediment; and (2) investigating the abundance of coliform in Demak waters. Moreover, in this research, water pollution index was also analyzed and compared to other polluted water areas. It was found that the Pb content ranged from 0.6037 to 0.6647 mg·1–1 whereas the Cd content ranged from 0.064 to 0.1707 mg·1–1. Both lead and cadmium contents had surpassed the water quality standard. The Pb content in sediment ranged from 0.563 to 0.6823 mg·kg-1 whereas the Cd content reached 0.0047 to 0.0577 mg·kg-1. It showed that this sediment was not polluted by Pb and Cd. The analysis of water pollution index revealed that the pollution level found in Morosari, Rejo, Tuntang, and Lohbener estuary was low. On the other hand, Wedung and Serang estuary were heavily polluted. Compared to some previous studies, most of Pb and Cd contents in Demak waters were greater. However, lead and cadmium content in sediment was lower.
Źródło:
Journal of Ecological Engineering; 2018, 19, 4; 43-54
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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