SR XRF element analysis of sea plankton

Bobrov, V. A.; Phedorin, M.A.; Леонова, Г.А.; Kolmogorov, Yu. P.

doi:10.1016/j.nima.2005.01.218

Cited by 21 publications

(10 citation statements)

References 5 publications

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“…The concentrations of some elements (Na, K, and Ca) in the plankton from the White Sea [23] exceed our results because after filtration their samples were not washed by distilled water.…”

Section: Resultscontrasting

confidence: 99%

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Neutron Activation Analysis and Scanning Electron Microscopy of Phytoplankton in the Coastal Zone of Crimea (The Black Sea)

Nekhoroshkov¹,

Kravtsova²,

Frontasyeva³

et al. 2014

AJAC

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The physiology and ecology of planktonic organisms are influenced by the concentration, chemical speciation and resulting bioavailability of some trace metals. The determination of the elemental structure of phytoplankton is important for interpretation of physiological and functional states of coastal ecosystems. The present study is focused on the structure and elemental composition of the phytoplankton assemblages from the different coastal zones by instrumental neutron activation analysis (INAA), scanning electron microscopy (SEM) and energy-dispersive X-ray spectrometry (EDS). For the first time these complementary techniques were simultaneously applied to study the Black Sea phytoplankton. The concentrations of 45 elements in the coastal phytoplankton communities used as bioindicator of inorganic contamination of the Black Sea coastal area near Sevastopol, Ukraine, were determined. Phytoplankton samples were collected by total tows of the plankton net with 35 μm pore size at 3 stations situated in polluted and relatively pristine water areas of the Sevastopol coastal zone during autumn period of the phytoplankton growth. The concentration of Mg, Al, Sc, Ti, V, Mn, As, Rb, Ba, Th and Fe, Cr increases exponentially from relatively pristine station to more polluted station and 10-times and 3-times greater, respectively, in the phytoplankton of the Sevastopol Bay. The rare-earth elements have relatively the same concentration values less than 1 μg/g and tend to accumulate in the phytoplankton from the polluted station in the Sevastopol Bay. The obtained results are in a good agreement with the elemental concentration data in the oceanic plankton, plankton communities from the White Sea and the Black Sea. Using energy-dispersive X-ray spectrometry the mineral particles of unknown origin and impurities of copper (0.42% by weight) in the phytoplankton at the polluted station and zinc (0.57% by weight) at the relatively pristine station were determined. * Corresponding author. P. S. Nekhoroshkov et al.324

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“…The concentrations of some elements (Na, K, and Ca) in the plankton from the White Sea [23] exceed our results because after filtration their samples were not washed by distilled water.…”

Section: Resultscontrasting

confidence: 99%

“…Our data were compared with the elemental concentrations in phytoplankton from the coastal waters of different regions of the World Ocean [15] [22] [23].…”

Section: Resultsmentioning

confidence: 99%

Neutron Activation Analysis and Scanning Electron Microscopy of Phytoplankton in the Coastal Zone of Crimea (The Black Sea)

Nekhoroshkov¹,

Kravtsova²,

Frontasyeva³

et al. 2014

AJAC

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“…The slopes in Fig 3a indicate that the sediment-derived halogen component has a fairly constant seawater-corrected Br/I weight ratio of ~0.3-1.6 (Fig 3a;Kendrick et al, 2011a). The low seawater-corrected Br/I ratio of sedimentary pore waters (0.3-1.6), compared to plankton (3-24; Bobrov et al, 2005;Collins, 1969;Martin et al, 1993), reflects preferential mobilisation of I compared to Br during diagenesis, with the excess I representing the surface-adsorbed I component acquired under oxic conditions (Francois, 1987;Martin et al, 1993;Upstillgoddard and Elderfield, 1988). In comparison, the solid sedimentary phase preserves higher Br/I ratios, which are similar to planktonic values (Fig 3;Muramatsu et al, 2007).…”

Section: Iodine and Bromine In Organic Mattermentioning

confidence: 92%

“…In comparison, plankton has variable halogen contents ranging from sub-ppm to typical values of ~200 to 300 ppm I and 1000 to 4000 ppm Br. Plankton have Br/I weight ratios of 3-24 and I/Corganic of 0.0002-0.002 (Bobrov et al, 2005;Iwamoto and Shiraiwa, 2012;Martin et al, 1993;Price and Calvert, 1977).…”

Section: Iodine and Bromine In Organic Mattermentioning

confidence: 99%

Halogens in Seawater, Marine Sediments and the Altered Oceanic Lithosphere

Kendrick

2018

Springer Geochemistry

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This chapter aims to provide a framework for understanding the distribution of halogens in the oceanic lithosphere. It reviews the concentration of F, Cl, Br and I in seawater, marine sediment pore waters, hydrothermal vent fluids, fluid inclusions from deeper in the crust, and the complementary solid-phase reservoirs of organic matter and minerals present in sediments and crustal rocks from varying depths. Seawater (3.4-3.5 wt. % salt) is depleted in F, weakly enriched in I and strongly enriched in Br and Cl compared to the primitive mantle. Sequestration of I and Br by phytoplankton lead to the storage of these elements in marine sediments which are the Earths dominant I reservoir. Regeneration of organic matter during diagenesis releases I and Br to marine sediment pore waters which can be advected into the underlying crust and lithosphere. In contrast, Cl is assumed to behave conservatively in pore waters and F is precipitated in sedimentary minerals meaning it is not significantly advected into the underlying basement. Vent fluids have salinities of 0.1-6 wt. % salts, which provide evidence for phase separation and segregation of vapours and brines in hydrothermal systems. The majority of vent fluids have Br/Cl ratios within 10% of the seawater value. However, elevated Br/Cl and I/Cl ratios indicate that some vent fluids interact with sediments, and depressed Br/Cl ratios suggest some vent fluids leach Cl from glassy volcanic rocks or halite. Vent fluids have F/Cl ratios scattered around the seawater value which reflects the generally low mobility of F during diagenesis and hydrothermal alteration. In comparison to vent fluids, fluid inclusions also provide evidence for phase separation but preserve a much greater range of salinity including brines with salinities as high as ~50 wt. % salt in many parts of the crust. The altered ocean crust has a F concentration of close to its initial value. In contrast, Cl is mobilised within layer 2 pillows and dykes and strongly enriched in layer 3 gabbros subjected to high temperature alteration. Amphibole is the dominant Cl host in the oceanic crust, with Cl concentrations of <500 ppm under greenschist conditions and up to wt. % levels under amphibolite conditions. The increasing Cl content of amphibole as a function of metamorphic grade most likely reflects a decreasing water/rock ratio and a general increase in fluid salinity as a function of depth in the crust. Amphibole preferentially incorporates Cl relative to Br and I; however, it is possible that I is enriched in absolute terms, and relative to Cl, in clay-rich alteration and biogenic alteration of glassy rocks in the upper crust. Serpentinites formed in the oceanic lithosphere can contain thousands of ppm Cl and some serpentinites preserve Br/Cl and I/Cl signatures very similar to sedimentary pore waters, indicating that all halogens have high compatibilities in serpentine. Fluorine is slightly enriched in serpentinites compared to peridotites which may indicate mobilisation of F from igneous lithologies in th...

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“…The broad scope of chemical elements starting from atomic number 19 and up to W, Pb, Th, U is [3][4][5]. The geochemical peculiarity of sapropel is that it consists of up to 90-95 % H 2 O due to its high moisture con tent.…”

Section: Methodsmentioning

confidence: 99%

Investigation into the elemental composition of sapropel from Lake Kirek (West Siberia) by SR XFA technique

Bobrov

Fedorin

Леонова

et al. 2012

J. Synch. Investig.

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The synchrotron radiation X ray fluorescence analysis (SRXFA) technique was applied for scan ning two sapropel cores: 6.2 m (coordinates of boring 56°11Ј93Љ N, 84°23Ј22Љ E) and 3.6 m (56°10Ј93Љ N, 84°22Ј94Љ E), obtained at a depth of 5 and 7 m, respectively, in Lake Kirek (southern part of Tomsk oblast, West Siberia). Based on variations in the content of eight chemical elements in stratified core horizons, the geochemical types of the sapropels and their prevalence were established. In the sediment of the 6.2 m core within the overall boundaries of the Holocene, low ferric calcareous sapropel dominates, the geochemical characteristic of which is presented by the average values of 13 chemical elements in the strata grouped by the main climatic periods of the Holocene. Organic ferrous sapropel 90 cm in depth was uncovered in the 3.6 m core in the range 215-305 cm (age of 7-4 ka). For the other core horizons, the deposit is represented by cal careous sapropel, but with higher contents of iron in comparison with the first type. The geochemical differ entiation of these two types of sapropels (in 3.6 m core) is characterized by average contents of 31 chemical elements. The consistency of the compositions and concentrations of chemical elements in sapropels in the Holocene section of the deposits is evidence of the identical formation conditions for these types of sapropel.

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SR XRF element analysis of sea plankton

Cited by 21 publications

References 5 publications

Neutron Activation Analysis and Scanning Electron Microscopy of Phytoplankton in the Coastal Zone of Crimea (The Black Sea)

Neutron Activation Analysis and Scanning Electron Microscopy of Phytoplankton in the Coastal Zone of Crimea (The Black Sea)

Halogens in Seawater, Marine Sediments and the Altered Oceanic Lithosphere

Investigation into the elemental composition of sapropel from Lake Kirek (West Siberia) by SR XFA technique

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