scholarly journals Vertical distribution of trace-element concentrations and occurrence of metallurgical slag particles in accumulated bed sediments of Lake Roosevelt, Washington, September 2002

2005 ◽  
Author(s):  
S.E. Cox ◽  
P.R. Bell ◽  
J.S. Lowther ◽  
P.C. Van Metre
Keyword(s):  
Vertical Distribution ◽  
Trace Element ◽  
Metallurgical Slag ◽  
Bed Sediments ◽  
Element Concentrations

Aquatic Insects as Bioindicators of Trace Element Contamination in Cobble-Bottom Rivers and Streams

1992 ◽  
Vol 49 (10) ◽  
pp. 2141-2154 ◽  
Author(s):  
Daniel J. Cain ◽  
Samuel N. Luoma ◽  
James L. Carter ◽  
Steven V. Fend
Keyword(s):  
Trace Element ◽  
Aquatic Insects ◽  
Single Species ◽  
Common Species ◽  
Whole Body ◽  
Individual Species ◽  
Bed Sediments ◽  
Element Concentrations ◽  
Mining Complex ◽  
Trace Element Contamination

Trace element bioaccumulation was studied in immature benthic insects from two contaminated river systems to develop these animals as bioindicators. In one river, Cu, Cd, Pb, and Zn were analysed in insects and in fine bed sediments over a 381-km reach downstream of a large copper mining complex. In the other river, As contamination from a gold mine was assessed in insects and bed sediments over a 40-km reach. All insect taxa collected in contaminated river reaches had elevated whole-body trace element concentrations. However, direct comparisons of contamination using a single, common species among stations were limited because few species were distributed throughout the study reaches. Comparisons of contamination at taxomic levels higher than species were complicated by element-specific differences in bioaccumulation among taxa. These differences appeared to be governed by biological and hydrogeochemical factors. The variation in element concentrations among species of the caddisfly Hydropsyche was slightly greater than within individual species. If this genus is representative of others, comparisons of contamination within genera may be a practical alternative for biomonitoring studies when single species are not available.

ASSESSMENT OF TRACE ELEMENT CONCENTRATIONS IN THE FARMINGTON RIVER, HARTFORD COUNTY, CT

2016 ◽  
Author(s):  
Matthew Costa ◽  
◽  
Carley M. Cavanaugh ◽  
Oluyinka Oyewumi
Keyword(s):  
Trace Element ◽  
Element Concentrations

Trace element concentrations in ambient air as a function of distance from road

2020 ◽  
Author(s):  
Emily Silva ◽  
Shaodan Huang ◽  
Joy Lawrence ◽  
Marco A.G. Martins ◽  
Jing Li ◽  
...  
Keyword(s):  
Trace Element ◽  
Ambient Air ◽  
Element Concentrations

Trace element concentrations and associations in some biomass ashes

Fuel ◽  
2014 ◽  
Vol 129 ◽  
pp. 292-313 ◽  
Author(s):  
Stanislav V. Vassilev ◽  
Christina G. Vassileva ◽  
David Baxter
Keyword(s):  
Trace Element ◽  
Element Concentrations ◽  
Biomass Ashes

PIXE ANALYSIS OF CARTILAGE SAMPLES

1992 ◽  
Vol 02 (04) ◽  
pp. 481-487 ◽  
Author(s):  
J. VOGT ◽  
G. OTTO ◽  
K.H. Dannhauer
Keyword(s):  
Trace Element ◽  
Proton Beam ◽  
Pixe Analysis ◽  
Domestic Pigs ◽  
Element Concentrations ◽  
Elemental Contents ◽  
Intensive Investigation ◽  
Pixe Method

Despite intensive investigation, normal and abnormal calcification mechanisms are still poorly understood. In our study we measured the change of main and trace element concentrations across the calcification area of the mandibular cartilage of domestic pigs of different age. The PIXE method was employed for the analysis of the cartilage samples, using a proton beam with an energy of 1700 keV. Concentration values of the elements P, S, Cl, K, Fe, Ni, Cu, Zn, Br, Rb, and Sr were evaluated from the measured spectra. Significant changes of elemental contents across the calcification area could be observed.

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