Geochemical Typing of Organic Matter in the Bottom Sediments Based on the Molecular Composition of Saturated Aliphatic Hydrocarbons

Oceanology ◽  
2021 ◽  
Vol 61 (5) ◽  
pp. 727-735
Author(s):  
A. S. Ulyantsev ◽  
N. A. Prokuda ◽  
E. A. Streltzova ◽  
N. A. Belyaev ◽  
E. A. Romankevich
Keyword(s):  
Organic Matter ◽  
Bottom Sediments ◽  
Molecular Composition ◽  
Aliphatic Hydrocarbons

scholarly journals High-Low Tide Water Area Bottom Sediments Composition (the Tatar Strait South- Western Part)

2018 ◽  
Author(s):  
Keyword(s):  
Organic Matter ◽  
Bottom Sediments ◽  
Aromatic Hydrocarbons ◽  
River Estuary ◽  
Water Area ◽  
Aliphatic Hydrocarbons ◽  
Molecular Spectra ◽  
Tatar Strait ◽  
Mineral Components ◽  
Chemical Background

Data on the carbon hydrates content and composition is given: aliphatic hydrocarbons and aromatic hydrocarbons in comparison with total organic matter, phyto/pigments and quantity of heterotrophic and oil-oxidizing bacteria in bottom sediments of the Toki River tide estuary (the Tatar Strait). It has been stated that substance/structural composition of the sedimentation material in the Toki River estuary is determined by two matter flows of opposite direction: terrigenous runoff with river waters (wood and grass remains, fresh water phyto- and bacteria-plankton, anthropogenous pollutants including aliphatic hydrocarbons and aromatic hydrocarbons) and materials of marine origin including mineral components (fine-dispersed sand fractions), died-off macrovegetations, sea grass phyto- and bacteria- plankton. Phyto-and bacteria-benthos communities well-adopted to variable conditions of salinity are developing in bottom sediments. High ability of the benthos microbe community to hydrocarbons utilization has been revealed. At the same time intermediate products of organic matter destruction (spirits and ethers) are found in the estuary bottom sediments micro/aerophilic conditions. Over the period from 2009 to 2016 a considerable increase of toxic aromatic hydrocarbons content in the Toki River internal estuary has been registered – a probable source of them is a solid waste dump located on the river catchment. According to group composition of н-alkanes molecular spectra, natural sources contribute the most in formation of the current bio/geo/chemical background of the smaller estuary.

HEAVY METAL SPECIATION IN BOTTOM SEDIMENTS OF THE VYSHNEVOLOTSKY RESERVOIR

2018 ◽  
pp. 46-54
Author(s):  
O. A. Lipatnikova
Keyword(s):  
Heavy Metal ◽  
Organic Matter ◽  
Bottom Sediments ◽  
Metal Speciation ◽  
Organic Matter Content ◽  
Water Reservoir ◽  
Matter Content ◽  
Heavy Metal Speciation ◽  
Mobile Forms ◽  
Manganese Hydroxides

The study of heavy metal speciation in bottom sediments of the Vyshnevolotsky water reservoir is presented in this paper. Sequential selective procedure was used to determine the heavy metal speciation in bottom sediments and thermodynamic calculation — to determine ones in interstitial water. It has been shown that Mn are mainly presented in exchangeable and carbonate forms; for Fe, Zn, Pb и Co the forms are related to iron and manganese hydroxides is played an important role; and Cu and Ni are mainly associated with organic matter. In interstitial waters the main forms of heavy metal speciation are free ions for Zn, Ni, Co and Cd, carbonate complexes for Pb, fulvate complexes for Cu. Effects of particle size and organic matter content in sediments on distribution of mobile and potentially mobile forms of toxic elements have been revealed.

scholarly journals Molecular characterization of an end-residue of humeomics applied to a soil humic acid

RSC Advances ◽  
2014 ◽  
Vol 4 (45) ◽  
pp. 23658-23665 ◽  
Author(s):  
A. Nebbioso ◽  
A. Piccolo ◽  
M. Lamshöft ◽  
M. Spiteller
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Molecular Characterization ◽  
Natural Organic Matter ◽  
Molecular Composition ◽  
Chemical Fractionation ◽  
Soil Humic Acid

Humeomics encompasses step-wise chemical fractionation and instrumental determination to fully characterize the heterogeneous molecular composition of natural organic matter.

Composition and genesis of the organic matter in the bottom sediments of the East Siberian Sea

2008 ◽  
Vol 46 (2) ◽  
pp. 156-167 ◽  
Author(s):  
A. A. Vetrov ◽  
I. P. Semiletov ◽  
O. V. Dudarev ◽  
V. I. Peresypkin ◽  
A. N. Charkin
Keyword(s):  
Organic Matter ◽  
Bottom Sediments ◽  
East Siberian Sea
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