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Main Title Metal Affinities in Single and Multiple Ion Adsorption Reaction at Sulfide Mineral Surfaces.
Author Yuhuan, L. ; Bailey, G. W. ; Lynch., A. T. ;
CORP Author Academia Sinica, Beijing (China). ;Technology Applications, Inc., Athens, GA.;Environmental Research Lab., Athens, GA.
Publisher Jan 89
Year Published 1989
Report Number EPA/600/M-90/010;
Stock Number PB90-245598
Additional Subjects Sulfide minerals ; Surface chemistry ; Metals ; Aerobic processes ; Soil surveys ; Ground water ; Adsorption ; Ions ; pH ; Acidity ; Chemical equilibrium ; Geochemistry ; Anaerobic processes ; Sediments ; Environmental surveys ; Water pollution ; Reprints ; Environmental transport ; Chemical reaction mechanisms ; MINTEQA1 model ; Heavy metals ; Land pollution
Library Call Number Additional Info Location Last
NTIS  PB90-245598 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 18p
The sulfide mineral is an important constituent in soil and aquifer material. It plays a dramatic role in controlling of transport and transformation of heavy metal in soil and ground water. Sulfide minerals are found in porous media in both aerobic and anaerobic environments. The relative binding affinities and reaction products for ten metal-metalloid irons reacting with four sulfide minerals have been defined. For any particular metal and mineral, the greater reactivity occurs in the single-ion metal system except Ag(I) on pyrite and Cu(II) on galena. Both precipitation and adsorption reactions can decrease metal ion mobility on porous media. The order of metal mobility in the presence of chalcocite, pyrite, galena, and sphalerite is predicted to be: Zn(II), Cd(II) and Ni(II)--mobile; Cu(II), Pb(II), Fe(II), As(III) and Cr(III)--variable mobility; and Ag(I)--immobile. MINTEQA1 predictions on metal phase distribution-partitioning compared quite well with those observed experimentally. Solubility product considerations, intrinsic acidity constant of the mineral, Eh, pH and the carbonate equilibrium are major factors controlling the phase distribution of metals reacting singularly or in combination with sulfide mineral surfaces.