scholarly journals Geochemical conditions conducive for retention of trace elements and radionuclides during shale–fluid interactions

2019 ◽  
Vol 21 (10) ◽  
pp. 1764-1776
Author(s):  
Neha Mehta ◽  
Benjamin D. Kocar
Keyword(s):  
Trace Elements ◽  
Produced Water ◽  
Water Interface ◽  
Geochemical Conditions ◽  
Fluid Interactions

Geochemical interactions occurring at the shale–water interface resulting in mobilization and retardation of solutes to produced water.

scholarly journals Mobility and fluxes of trace elements and nutrients at the sediment–water interface of a lagoon under contrasting water column oxygenation conditions

2013 ◽  
Vol 31 ◽  
pp. 35-51 ◽  
Author(s):  
Sylvain Rigaud ◽  
Olivier Radakovitch ◽  
Raoul-Marie Couture ◽  
Bruno Deflandre ◽  
Daniel Cossa ◽  
...  
Keyword(s):  
Trace Elements ◽  
Water Column ◽  
Water Interface

Relative mobility of radioactive trace elements across the sediment-water interface in the MERL model ecosystems of Narragansett Bay

1987 ◽  
Vol 45 (4) ◽  
pp. 1007-1048 ◽  
Author(s):  
Peter H. Santschi ◽  
Michael Amdurer ◽  
Dennis Adler ◽  
Patricia O'Hara ◽  
Yuan-Hui Li ◽  
...  
Keyword(s):  
Trace Elements ◽  
Narragansett Bay ◽  
Water Interface ◽  
Relative Mobility ◽  
Model Ecosystems ◽  
Radioactive Trace

scholarly journals Emerging investigator series: geochemistry of trace elements associated with Fe and Mn nodules in the sediment of limed boreal lakes

2018 ◽  
Vol 20 (2) ◽  
pp. 406-414 ◽  
Author(s):  
Raoul-Marie Couture ◽  
Atle Hindar ◽  
Sigurd Rognerud
Keyword(s):  
Trace Elements ◽  
Boreal Lakes ◽  
Water Interface ◽  
Fe And Mn ◽  
Acidified Lakes

We report on the geochemical legacy of the liming of acidified lakes in Norway. We document the occurrence of Fe–Mn nodules and the diagenetic redistribution of trace-elements at the sediment–water interface of limed boreal lakes.

scholarly journals Impacts of Possible CO2 Seepage from Sub-Seabed Storage on Trace Elements Mobility and Bacterial Distribution at Sediment-Water Interface

2012 ◽  
Vol 23 ◽  
pp. 449-461 ◽  
Author(s):  
Murat V. Ardelan ◽  
Kathrine Sundeng ◽  
Gøril A. Slinde ◽  
Nina S. Gjøsund ◽  
Trond Nordtug ◽  
...  
Keyword(s):  
Trace Elements ◽  
Water Interface

Exchange of trace elements at the sediment-water interface during early diagenesis processes

1995 ◽  
Vol 46 (1) ◽  
pp. 19 ◽  
Author(s):  
W Petersen ◽  
K Wallman ◽  
L Pinglin ◽  
F Schroeder ◽  
HD Knauth
Keyword(s):  
Trace Elements ◽  
Sediment Cores ◽  
Early Diagenesis ◽  
Water Phase ◽  
Laboratory Simulation ◽  
Sediment Surface ◽  
Water Interface ◽  
Large Area ◽  
Overlying Water ◽  
River Elbe

The exchange processes at the sediment-water interface can significantly influence the transport of trace contaminants in a river. In order to investigate the importance of these processes in the tidal part of the River Elbe, a laboratory 'simulation' apparatus (LABOSI) was used that allows the incubation of undisturbed sediment cores with a relatively large area (1700 cm²) in a closed system under defined conditions (temperature, pH, pE, etc.). Together with measured depth profiles of the pore-water and the solids of the incubated cores before and after the experiment, this method allows all relevant processes to be investigated in all three phases (sediment, overlying water, gas) simultaneously. Under oxic conditions, a flux of heavy metals (Cu, Cd , Zn) into the water phase was observed as a result of the mineralization of organic matter in the thin oxic layer of the sediment (thickness about 3 mm) as well as a flux of manganese caused by diffusion from deeper anoxic layers. Up to 40% of Cd, Zn and Ni and 15% of Zn deposited in the sediment by settling of contaminated suspended particulate matter can be remobilized from the sediment surface by the processes of early diagenesis. Within 14 days, an enrichment of arsenic in the sediment surface caused by diffusion from deeper anoxic layers could be detected. Under anoxic conditions and when the other electron acceptors were consumed, Fe(II) was released and accompanied by a strong remobilization of As, Co and Cr and an accelerated release of Mn(II). This release was soon stopped when the water phase became oxic again, and the trace elements were removed from the water phase by co-precipitation andlor adsorption on the freshly formed hydrous ferric oxides.

scholarly journals Trace Elements Affect Methanogenic Activity and Diversity in Enrichments from Subsurface Coal Bed Produced Water

2012 ◽  
Vol 3 ◽  
Author(s):  
Burcu Ünal ◽  
Verlin Ryan Perry ◽  
Mili Sheth ◽  
Vicente Gomez-Alvarez ◽  
Kuk-Jeong Chin ◽  
...  
Keyword(s):  
Trace Elements ◽  
Produced Water ◽  
Coal Bed ◽  
Methanogenic Activity

scholarly journals Distribution, Mobility and Fate of Trace Elements in an Estuarine System Under Anthropogenic Pressure: the Case of the Karstic Timavo River (Northern Adriatic Sea, Italy)

2021 ◽  
Author(s):  
Elena Pavoni ◽  
Matteo Crosera ◽  
Elisa Petranich ◽  
Jadran Faganeli ◽  
Katja Klun ◽  
...  
Keyword(s):  
Trace Elements ◽  
Surface Sediments ◽  
Suspended Particles ◽  
Critical Conditions ◽  
Residual Fraction ◽  
Secondary Source ◽  
Estuarine System ◽  
Anthropogenic Pressure ◽  
Water Interface ◽  
Northern Adriatic

AbstractThe accumulation of contaminants and their potential mobility represent two of the main environmental issues facing coastal environments. Sediments often act as “reservoirs” of contaminants, including potentially toxic trace elements, but they can also be considered a secondary source of contamination due to remobilisation processes at the sediment-water interface which may affect the quality of the coastal water and aquatic biota. This research aims to provide a geochemical characterisation of the estuarine system of the Timavo/Reka River, focusing on the occurrence of trace elements in different environmental matrices with the purpose of highlighting potential critical conditions in terms of environmental quality. The surface sediments were found to be enriched in several trace elements especially in the innermost sector of the area. There, sulphate-reductive conditions in the bottom saltwater testify to potential anoxia at the sediment-water interface, driving trace element accumulation in the residual fraction of the sediments. However, Fe and Mn redox behaviour appears to play a crucial role in the recycling of dissolved trace elements in the water column. With the lone exception of the saltwater in the innermost sector, trace elements were found to be mainly associated with suspended particles due to oxidation and precipitation processes, whereas a common lithogenic origin was identified for Cr, Ni, and Co, which are significantly correlated both in the surface sediments and in the suspended particles.

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