Book ChapterDOI
The role of organic matter in mercury cycle
G. M. Varshal,Nugzar Buachidze,T. K. Velyukhanova,D. N. Chkhetia +3 more
- pp 403-414
TLDR
In this article, the role of natural organic substances in dissolution, transport and concentrating of mercury in environment are generalized, and the interaction of mercury (II) with fulvic acids (FA) and humic acids (HA) have been studied.Abstract:
The data about the role of natural organic substances in dissolution, transport and concentrating of mercury in environment are generalized. The interaction of mercury (II) with fulvic acids (FA) and humic acids (HA) have been studied. It has been shown that in the reaction of mercury ions with FA stable soluble high-molecular mercury (II) fulvate complexes are formed. These complexes are predominating form of mercury in surface fresh waters. The interaction of mercury (II) with FA leads to the abrupt increase of mercury mobility in waters and sails. On the contrary HA behave as complexing sorbents promoting mercury concentrating in soils and bottom sediments. Another direction of mercury (II) interaction with humus acids is the formation of organomercury compounds. Principal possibility of abiological methylation of mercury by means of interaction of mercury (II) with FA has been proved. The output of methylmercury increases with concentration of FA and pH.read more
Citations
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Journal ArticleDOI
Mercury in the Aquatic Environment: A Review of Factors Affecting Methylation
TL;DR: The current state of knowledge on the physicochemical behavior of mercury in the aquatic environment, and in particular the environmental factors influencing its transformation into highly toxic methylated forms is examined in this paper.
Journal ArticleDOI
Interactions between mercury and dissolved organic matter––a review
TL;DR: The ability of organic matter to enhance the dissolution and inhibit the precipitation of mercuric sulfide, a highly insoluble solid, suggests that DOM competes with sulfide for mercury binding, confirmed by very high conditional stability constants for mercury-organic sulfur (RSHg+) complexes (10(25)-10(32)) recently reported in literature.
Journal ArticleDOI
Processes influencing the emission of mercury from soils: A conceptual model
H. Zhang,S. E. Lindberg +1 more
TL;DR: In contrast to recent rapid growth in the field data on mercury flux over soils, our knowledge and understanding of the emission processes and controlling mechanisms still remains limited as discussed by the authors, and many processes could control emission of mercury from soils.
Journal ArticleDOI
Bioavailability of Humic Substance-Bound Mercury to Lettuce and its Relationship with Soil Properties
TL;DR: In this paper, the bioavailability of humic substance-bound mercury (HS-Hg) in relation to soil properties was investigated using lettuce (Lactuca sativa var. Angustana irish).
Journal ArticleDOI
Factors Determining Migration and Transformation of Mercury in the Mouths of Northern Rivers
TL;DR: In this article, the authors considered the factors that determine the migration and transformation of mercury in complex hydrochemical areas of rivers-estuaries, based on the results of observations carried out since 2004 at the mouths of the Northern Dvina, Pechora and Kyanda Rivers.
References
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Book
The geochemistry of natural waters
TL;DR: The Hydrologic Cycle and Chemical Background of Natural Waters as mentioned in this paper, the Carbonate System and pH Control 5 Clay Minerals and Ion Exchange 6 Stability Relationships and Silicate Equilibria 7 Kinetics 8 Weathering and Water Chemistry, I: Principles 9 Water Chemistry Chemistry, II: Examples 10 Acid Deposition and Surface Water Chemistry 11 Evaporation and Saline Waters 12 The Oceans 13 Redox Eilibria 14 Redox Conditions in Natural Waters 15 Trace Elements 16 Mathematical and Numerical Models 17 Isotopes Appendices
Journal ArticleDOI
Mercury in the Swedish environment — Recent research on causes, consequences and corrective methods
Oliver Lindqvist,Kjell Johansson,Lage Bringmark,Birgitta Timm,Mats Aastrup,Arne Andersson,Gunnar Hovsenius,Lars Håkanson,Åke Iverfeldt,Markus Meili +9 more
TL;DR: In the last decade, a new pattern of Hg pollution has been discerned, mostly in Scandinavia and North America, mostly due to more widespread air pollution and long-range transport of pollutants.
Journal ArticleDOI
The complexation of metals with humic materials in natural waters
TL;DR: In this paper, the authors used the HALTAFALL program of Ingri et al. (1967) to compute speciation models for freshwaters and seawater which take into account metal-humic interactions.
Journal ArticleDOI
Chemical speciation in natural waters
TL;DR: In this paper, the authors define chemical speciation as the determination of the individual concentrations of the various chemical forms of an element which together make up the total concentration of that element in a sample.