Mobilization, Adsorption, and Bioavailability of Pt and Pd in Coastal Sediments: The Role of the Polychaete, Arenicola marina

2008 ◽  
Vol 42 (10) ◽  
pp. 3543-3549 ◽  
Author(s):  
Ben French ◽  
Andrew Turner
Keyword(s):  
Coastal Sediments ◽  
Arenicola Marina

scholarly journals Detailed Spectroscopic Studies in the Aquatic Environment Using Synchrotron Radiation

2019 ◽  
Vol 21 ◽  
pp. 185
Author(s):  
N. Moraitis ◽  
K. Vassalos ◽  
T. J. Mertzimekis ◽  
A. Godelitsas ◽  
P. Gamaletsos ◽  
...  
Keyword(s):  
Aquatic Environment ◽  
Spectroscopic Studies ◽  
Coastal Sediments ◽  
Data Sets ◽  
Spectroscopic Techniques ◽  
Metals And Metalloids ◽  
Synchrotron Facility ◽  
Institute Of Technology ◽  
Karlsruhe Institute

The important role of metals and metalloids in the aquatic environment can be studied by means of Syn- chrotron Radiation (SR)-based X-ray spectroscopic techniques. In the present work, we have performed analyses of data sets (μ–XRF, μ–XANES and μ–EXAFS), for coastal sediments and marine precipitates, obtained at the ANKA Synchrotron Facility in Karlsruhe Institute of Technology (KIT, Germany). Prelim- inary results with regard to the distribution and speciation of toxic (Hg and As) and biocompatible (Fe) metals and metalloids are presented herein. It is therefore demonstrated that Fe is easily precipitated as FeIII oxyhydroxides, most likely related to As, as well as ferrihydrite-type FeIII hydrated oxyhydroxides, whereas Hg is rather accumulated in the form of methyl-containing compounds.

Role of Sediment Resuspension in the Remobilization of Particulate-Phase Metals from Coastal Sediments

2007 ◽  
Vol 41 (7) ◽  
pp. 2282-2288 ◽  
Author(s):  
Linda H. Kalnejais ◽  
William R. Martin ◽  
Richard P. Signell ◽  
Michael H. Bothner
Keyword(s):  
Sediment Resuspension ◽  
Coastal Sediments ◽  
Particulate Phase

Distribution of hydrocarbon-utilizing bacteria in Northwestern Atlantic waters and coastal sediments

1974 ◽  
Vol 20 (7) ◽  
pp. 955-962 ◽  
Author(s):  
G. J. Mulkins-Phillips ◽  
James E. Stewart
Keyword(s):  
Heterotrophic Bacteria ◽  
Previous History ◽  
Canadian Arctic ◽  
Coastal Sediments ◽  
Oil Spillage ◽  
History Of ◽  
Microbial Potential ◽  
Hydrocarbon Utilizing Bacteria ◽  
Surface Water Samples

An extensive survey was carried out to aid in understanding the role of indigenous microorganisms in the removal of oil from Northwestern Atlantic temperate to arctic marine environments. The presence of hydrocarbon-utilizing microorganisms was demonstrated in sediments and adjacent waters taken from Bermuda, Canadian Northwest Atlantic and Eastern Canadian Arctic marine shorelines. In addition, surface-water samples (5 m depth) taken at 11 different stations along a transect between Halifax and Bermuda, with one exception, showed the presence of significant numbers of hydrocarbon-utilizing microorganisms. The hydrocarbon-utilizing bacteria present included Nocardia, Pseudomonas, Flavobacter, Vibrio, and Achromobacter species. The fraction of the total heterotrophic bacteria represented by the hydrocarbon utilizers ranged up to 100% depending upon the area's previous history of oil spillage; the bulk of the values were less than 10%. The frequency of specific hydrocarbon utilization in decreasing order was hexadecene-1, pristane, hexadecane, dibenzothiophene, anthracene, and decalin. The location, numbers, variety, and broad capacity of the microbial hydrocarbon utilizers illustrate their ubiquity and indicate the microbial potential for removal or conversion of oil in the environments examined.

Burial Of Nutrient In Coastal Sediments: The Role Of Primary Producers

2004 ◽  
pp. 217-230 ◽  
Author(s):  
Jack J. Middelburg ◽  
Karline Soetaert ◽  
Peter M. J. Herman ◽  
Henricus T. S. Boschker ◽  
Carlo H. R. Heip
Keyword(s):  
Coastal Sediments ◽  
Primary Producers

scholarly journals CROSS-SHORE VARIATIONS IN SEDIMENT STRENGTH AT A SANDY BEACH

2018 ◽  
pp. 83
Author(s):  
Bridgit Reeve ◽  
Nina Stark ◽  
Peter Mewis
Keyword(s):  
Sandy Beach ◽  
Surf Zone ◽  
Coastal Sediments ◽  
Sediment Characteristics ◽  
Wave Load ◽  
Sediment Properties ◽  
Research Goal ◽  
Erosion And Accretion ◽  
Sediment Strength

The potential for erosion and accretion of coastal sediments is governed by local hydrodynamics and sediment characteristics. These factors are highly spatially and temporally variable and strongly interact in the surf zone. It is known that for any change in the wave load, the system quickly seeks and adopts a new state of equilibrium. It follows that the understanding of the interactions between hydrodynamics and sediment properties is crucial for beach engineering. Particularly, there seems to be a lack of knowledge regarding the role of geotechnical sediment properties. The research goal of this study is to characterize the cross-shore variation of sediment strength across a sandy, erosive beach on the island of Sylt, Germany.

scholarly journals The Role of a Permeable Sand Column in Modifying Tidal Creek Nutrient Inputs into the Coastal Ocean

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3079
Author(s):  
Nicholas A. Legut ◽  
Brandon T. Hawkins ◽  
Angelos K. Hannides
Keyword(s):  
South Carolina ◽  
Nutrient Loading ◽  
Salinity Gradient ◽  
Coastal Ocean ◽  
Coastal Sediments ◽  
Nutrient Inputs ◽  
Tidal Creeks ◽  
Overlying Water ◽  
Sand Column

Estuarine tidal creeks are an important conduit for freshwater run-off into the coastal ocean. In Long Bay, South Carolina, tidal creeks terminate in swashes—broad sandy fields constantly reworked by discharged creek water. We examined the role of a highly permeable sandy column in altering the nutrient loading of the passing water at Singleton Swash, Myrtle Beach, South Carolina. Seasonal transects along the swash’s primary channel documented gradients in physical and biogeochemical parameters. The nutrient and chlorophyll a concentrations were higher in the sediment than in the overlying water, consistent with coastal sediments as a major site of organic matter degradation, nutrient regeneration, and benthic primary productivity. Oxygen, nutrient, and chlorophyll concentrations exhibited a strong seasonal component, explained by a photosynthesis–respiration balance shift between summer and winter. The conservative mixing model approach to elucidate the sink–source patterns was moderately informative due to the lack of a gradual salinity gradient from land to ocean, due to substantial tidal flushing and observable nutrient-rich surface freshwater discharges along the channel that fueled substantial submerged aquatic macroalgal growth. Future studies should focus on the role of benthic photosynthesizers, both microbial and macroalgal, in retaining land-derived nutrients in irrigation freshwater inputs prior to them reaching the coastal ocean.

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