scholarly journals Water Resources Research Program. Transport of oily pollutants in the coastal waters of Lake Michigan. An application of rare earth tracers

1978 ◽  
Author(s):  
D. McCown ◽  
K. Saunders ◽  
J. Allender ◽  
J. Ditmars ◽  
W. Harrison
Keyword(s):  
Rare Earth ◽  
Water Resources ◽  
Research Program ◽  
Coastal Waters ◽  
Lake Michigan

scholarly journals Geochemical Assessment and Mobility of Undesired Elements in the Sludge of the Phosphate Industry of Gafsa-Metlaoui Basin, (Southern Tunisia)

2021 ◽  
Vol 11 (3) ◽  
pp. 1075
Author(s):  
Olfa Smida ◽  
Radhia Souissi ◽  
Marzougui Salem ◽  
Fouad Souissi
Keyword(s):  
Rare Earth ◽  
Water Resources ◽  
Chemical Analysis ◽  
Leaching Tests ◽  
Mineralogical Analysis ◽  
P2o5 Content ◽  
Phosphate Industry ◽  
Carbonate Fluorapatite ◽  
Enrichment Process ◽  
Geochemical Assessment

The raw phosphates in the Gafsa-Metlaoui phosphate basin are valorized by wet processes that are performed in the laundries of the Gafsa Phosphates Company (CPG, Gafsa, Tunisia) to reach market grades (>28% P2O5). This enrichment process allows the increase of P2O5 content by the elimination of the coarse (>2 mm) and fine (<71 µm) fractions. Mineralogical analysis has shown that all the investigated materials (raw phosphate, marketable phosphate, coarse waste, and fine waste) from the laundries of M’Dhilla-Zone L and Redeyef are both composed of carbonate fluorapatite, carbonates, quartz, gypsum, clays, and clinoptilolite. Chemical analysis shows that Cr, Cd, Zn, Pb, and U are concentrated in the fine wastes and associated with the clay–phosphate fraction. The rare earth elements are more concentrated in both raw and marketable phosphates. Drilling and sludge-water analysis, along with leaching tests conducted on the fine wastes, showed that, due to phosphate industry, cadmium, fluorine, and sulfate contributing to the pollution of water resources in the region, pollution is more conspicuous at M’Dhilla.

Influence of dissolved organic matter on rare earth elements and yttrium distributions in coastal waters

2010 ◽  
Vol 26 (2) ◽  
pp. 123-135 ◽  
Author(s):  
P. Censi ◽  
P. Zuddas ◽  
L. A. Randazzo ◽  
F. Saiano ◽  
S. Mazzola ◽  
...  
Keyword(s):  
Organic Matter ◽  
Rare Earth ◽  
Dissolved Organic Matter ◽  
Rare Earth Elements ◽  
Coastal Waters
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