Phytotoxicity of floodplain soils contaminated with trace metals along the Clark Fork River, Grant-Kohrs Ranch National Historic Site, Deer Lodge, Montana, USA

1997 ◽  
Vol 16 (7) ◽  
pp. 1422-1432
Author(s):  
Brian R. Rader ◽  
Del Wayne R. Nimmo ◽  
Phillip L. Chapman
Keyword(s):  
Trace Metals ◽  
Historic Site ◽  
Clark Fork River ◽  
Floodplain Soils ◽  
Deer Lodge

scholarly journals Baseline Flora and Fauna Survey and Evaluation of Riveside Environment at Grant-Kohrs Ranch National Historic Site Deer Lodge, Montana

1983 ◽  
Vol 7 ◽  
pp. 33-36
Author(s):  
Peter Rice ◽  
Phillip Tourangeau ◽  
Gary Ray ◽  
Jerry Bromenshenk
Keyword(s):  
Heavy Metal ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Baseline Survey ◽  
Vegetative Cover ◽  
Historic Site ◽  
Clark Fork River ◽  
Survey And Evaluation ◽  
Management Alternatives ◽  
Deer Lodge

There are four primary objectives in this study: 1. Baseline survey of flora and fauna at the Ranch; 2. The extent and severity of heavy metal contamination throughout the Ranch; 3. An evaluation of areas along the Clark Fork River within the Ranch that are denuded of vegetation or have little vegetative cover; and 4. To provide a list of possible management alternatives for the denuded areas.

scholarly journals Using FlFFF and aTEM to determine trace metal–nanoparticle associations in riverbed sediment

2010 ◽  
Vol 7 (1) ◽  
pp. 82 ◽  
Author(s):  
K. L. Plathe ◽  
F. von der Kammer ◽  
M. Hassellöv ◽  
J. Moore ◽  
M. Murayama ◽  
...  
Keyword(s):  
Trace Metals ◽  
Toxic Metals ◽  
Inductively Coupled Plasma ◽  
Large Scale ◽  
Size Fraction ◽  
Metal Nanoparticle ◽  
Contaminated Sediment ◽  
Inductively Coupled ◽  
Clark Fork River ◽  
Nano Size

Environmental context. Determining associations between trace metals and nanoparticles in contaminated systems is important in order to make decisions regarding remediation. This study analysed contaminated sediment from the Clark Fork River Superfund Site and discovered that in the <1-μm fraction the trace metals were almost exclusively associated with nanoparticulate Fe and Ti oxides. This information is relevant because nanoparticles are often more reactive and show altered properties compared with their bulk equivalents, therefore affecting metal toxicity and bioavailability. Abstract. Analytical transmission electron microscopy (aTEM) and flow field flow fractionation (FlFFF) coupled to multi-angle laser light scattering (MALLS) and high-resolution inductively coupled plasma mass spectroscopy (HR-ICPMS) were utilised to elucidate relationships between trace metals and nanoparticles in contaminated sediment. Samples were obtained from the Clark Fork River (Montana, USA), where a large-scale dam removal project has released reservoir sediment contaminated with toxic trace metals (namely Pb, Zn, Cu and As) which had accumulated from a century of mining activities upstream. An aqueous extraction method was used to recover nanoparticles from the sediment for examination; FlFFF results indicate that the toxic metals are held in the nano-size fraction of the sediment and their peak shapes and size distributions correlate best with those for Fe and Ti. TEM data confirms this on a single nanoparticle scale; the toxic metals were found almost exclusively associated with nano-size oxide minerals, most commonly brookite, goethite and lepidocrocite.

Spatial and seasonal distribution of trace metals in floodplain soils. A case study with the Middle Elbe River, Germany

Geoderma ◽  
2013 ◽  
Vol 211-212 ◽  
pp. 128-137 ◽  
Author(s):  
Christiane Schulz-Zunkel ◽  
Frank Krueger ◽  
Holger Rupp ◽  
Ralph Meissner ◽  
Bernd Gruber ◽  
...  
Keyword(s):  
Trace Metals ◽  
Seasonal Distribution ◽  
Elbe River ◽  
Floodplain Soils

Diel Variation of Trace Metals in the Upper Clark Fork River, Montana

1996 ◽  
Vol 30 (6) ◽  
pp. 1953-1960 ◽  
Author(s):  
Christine M. Brick ◽  
Johnnie N. Moore
Keyword(s):  
Trace Metals ◽  
Diel Variation ◽  
Clark Fork River ◽  
Upper Clark Fork River

XRF and PIXE Analysis of light and Dark Adapted Ocular Tissue

1982 ◽  
Vol 40 ◽  
pp. 190-191
Author(s):  
B. J. Panessa ◽  
H. W. Kraner ◽  
J. B. Warren ◽  
K. W. Jones
Keyword(s):  
Trace Metals ◽  
Pigment Epithelium ◽  
Nerve Impulse ◽  
Light Response ◽  
Ocular Tissue ◽  
Emission Spectrometry ◽  
Retinol Dehydrogenase ◽  
Pixe Analysis ◽  
X Ray ◽  
Optimal Function

During photoexcitation the retina requires specific electrolytes and trace metals for optimal function (Na, Mg, Cl, K, Ca, S, P, Cu and Zn). According to Hagins (1981), photoexcitation and generation of a nerve impulse involves the movement of Ca from the rhodopsin-ladened membranes of the rod outer segment (ROS) to the plasmalemma, which in turn decreases the in-flow of Na into the photoreceptor, resulting in hyperpolarization. In toad isolated retinas, the presence of Ba has been found to increase the amplitude and prolong the delay of the light response (Brown and Flaming, 1978). Trace metals such as Cu, Zn and Se are essential for the activity of the metalloenzymes of the retina and retina pigment epithelium (RPE) (i.e. carbonic anhydrase, retinol dehydrogenase, tyrosinase, glutathione peroxidase, superoxide dismutase...). Therefore the content and fluctuations of these elements in the retina and choroid are of fundamental importance for the maintenance of vision. This paper presents elemental data from light and dark adapted frog ocular tissues examined by electron beam induced x-ray microanalysis, x-ray fluorescence spectrometry (XRF) and proton induced x-ray emission spectrometry (PIXE).

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