Browsing by Author "Saunders, James"

Now showing items 1-16 of 16

Bioremediation of an Arsenic-Contaminated Site, Using Sulfate-Reducing Bacteria, Bay County, Florida

Saffari Ghandehari, Shahrzad (2016-08-05)

In this study an in-situ bioremediation field demonstration project using sulfate-reducing bacteria was conducted at an As-contaminated site, in Bay County, Florida. The background levels of As ranged from 0.13 to 0.34 ...

Bioremediation of Arsenic Contaminated Groundwater in Northwest Florida: Mineralogy, Geochemistry, and Microbiology Changes

Levitt, Eric (2017-04-21)

This research demonstrates that the stimulation of natural sulfate-reducing bacteria (SRB) in groundwater can precipitate biogenic pyrite nanoparticles that play an active role in sequestering dissolved arsenic from ...

Fate and Transformation of Oils and Trace Metals in Alabama and Louisiana Coastal Marsh Sediments Associated with the British Petroleum Gulf Oil Spill

Natter, Michael (2012-04-10)

The effects of the 2010 BP Macondo-1 well oil spill on the geochemistry of sediments and water columns at ten Gulf salt-marsh sites were investigated, months after the spill ceased. The ten sampling sites include four ...

Geochemistry and Mineralogy of Eastern Ag-Rich Epithermal Veins in the Midas District, Nevada, USA

Chitwood, Rue (2012-04-09)

Five Ag-rich epithermal veins were recently discovered in the eastern section of the Midas district in northern Nevada. Initial data collected indicated that these veins had a significantly higher quantity of silver relative ...

Geochronology and Geochemistry of Mid-Miocene Bonanza Low-Sulfidation Epithermal Ores of the Northern Great Basin, USA

Unger, Derick (2008-05-15)

New high precision 40Ar/39Ar geochronology conducted on previously undated deposits (or deposits with older, less precise K/Ar dates only), indicates that low-sulfidation epithermal Au-Ag mineralization in the northern ...

Geology, Geochemistry and Geochronology of the mid-Miocene, Low-Sulfidation Epithermal Gold-Silver Ores on War Eagle Mountain, Silver City District, Idaho

Collins, Aseto (2012-05-14)

Located in southwest Idaho’ s Silver City district, War Eagle Mountain’s epithermal Au-Ag veins are structurally controlled arrays that are hosted by a Cretaceous granitoid. Taking into consideration similar deposits at ...

Groundwater Geochemistry, Geology, and Microbiology of Arsenic-contaminated Holocene Alluvial Aquifers, Manikganj, Bangladesh

Turner, Jamey (2006-05-15)

A multi-disciplinary study, using integrated aspects of geology, groundwater geochemistry including carbon isotope geochemistry, scanning electron microscopy, energy dispersive spectroscopy, and geochemical modeling, reveals ...

Hydrology and Water Chemistry in Weeks Bay, Alabama: Implications for Mercury Bioaccumulation

Monrreal, Robert (2007-08-15)

Recent studies within Weeks Bay, an estuary of Mobile Bay, have revealed that both water and fish are contaminated by mercury (Hg), an element known to be extremely toxic to wildlife and humans. Seasonal variations of ...

Igneous-Rock Hosted Orogenic Gold Deposit at Hog Mountain, Tallapoosa County, Alabama

Ozsarac, Safak (2016-08-24)

The Hog Mountain gold deposit is located in northern Tallapoosa County, Alabama and is part of the historic Goldville mining district. Hog Mountain is geologically located in the eastern Blue Ridge consisting of phyllites, ...

Interaction of Groundwater, Surface Water, and Seawater in Wolf Bay, Weeks Bay, and Dauphin Island Coastal Watersheds, Alabama

Beasley, Lee R. (2010-05-19)

Freshwater residing in coastal plain aquifers and watersheds represents one of our nation’s most important natural resources. Globally, the distribution and fluxes of freshwater in many coastal settings remains poorly ...

Mineralogical and geochemical profiling of arsenic-contaminated alluvial aquifers in the Ganges-Brahmaputra floodplain Manikganj, Bangladesh

Shamsudduha, Mohammad (2007-08-15)

The present study investigated three major components – groundwater, sediment and minerals of arsenic-affected Quaternary alluvial aquifers in Manikganj town, which is located in one of the As-hotspots in central Bangladesh. ...

Modeling the Effects of Projected Sea Level Rise on Water Quality in Coastal Bangladesh

Shuman, Morgan (2015-05-04)

Climate models show that Bangladesh will experience high rates of change in temperature, precipitation, runoff, and local sea level rise rates by 2100. Sea level rise will result in the degradation of groundwater quality ...

Numerical Modeling of Crustal Deformation and Pore-Pressure Changes Associated with the 1999 Chi-Chi Earthquake, Taiwan

Dyer, Gregory (2010-12-09)

A new 3D time-dependent pore-pressure diffusion model PFLOW is used to investigate the response of pore fluids to the crustal deformation generated by strong earthquakes in heterogeneous geologic media. Using a carefully ...

Ore Petrography, Geochemistry, and Genesis of Epithermal Silver-Gold Veins on Florida Mountain, Silver City District, Idaho

Mason, Michael (2015-08-21)

Geochemical and petrographic studies were conducted on the Black Jack-Trade Dollar vein, a high-grade, low-sulfidation epithermal Ag-Au deposit hosted in mid-Miocene volcanic rocks of the Owyhee Mountains in southwestern ...

Petrographic Analysis of Bonanza Epithermal Vein Textures at Buckskin National and Fire Creek Deposits, Northern Nevada

Taksavasu, Tadsuda (2017-04-17)

The Buckskin National and Fire Creek epithermal deposits, which are located in the Northern Great Basin in northern Nevada, exhibit a variety of gangue-mineral vein textures. Gangue minerals, which are valueless minerals, ...

Sorption of Arsenic by Iron Sulfide Made by Sulfate-reducing Bacteria: Implications for Bioremediation

Dhakal, Prakash (2008-12-15)

In this study, data from field bioremediation experiments, geochemical modeling, and laboratory batch experiments were integrated with published data on arsenic (As) sorption and coprecipitation onto growing iron (Fe)-sulfide ...