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Main Title Metal Interactions at Sulfide Mineral Surfaces. Part 2. Adsorption and Desorption of Lanthanum.
Author Lin, Y. ; Bailey, G. W. ; Lynch, A. T. ;
CORP Author Environmental Research Lab., Athens, GA. ;Academia Sinica, Beijing (China). ;Technology Applications, Inc., Athens, GA.
Publisher Oct 88
Year Published 1988
Report Number EPA/600/D-88/220;
Stock Number PB89-123152
Additional Subjects Mining ; Tailings ; Lanthanum ; Sulfide minerals ; Soil chemistry ; Water pollution ; Groundwater ; Adsorption ; Desorption ; EDTA ; Model tests ; Path of pollutants
Library Call Number Additional Info Location Last
NTIS  PB89-123152 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 45p
Batch-type adsorption experiments with four sulfide minerals (chalcocite, galena, pyrite, and sphalerite) were used to investigate the adsorption and desorption behavior of lanthanum (III) in the presence of ethylenediaminetetraacetic acid (EDTA), a model humic substance. Linear adsorption was found in all cases. The presence of EDTA caused a 5- to 10-fold increase of La(III) adsorbed and also changed the order of adsorption of the four minerals. The presence of a soluble organic complexing ligand like EDTA should reduce the mobility of La(III) in porous media and its transport to groundwater in the percolating soil solution. Binding mechanisms are proposed to account for this preferential adsorption behavior.