||Sorption, Important in Stabilized/Solidified Waste Forms.
Cheng, K. Y.;
Bishop., P. L.;
||Dames and Moore, Cincinnati, OH. ;Cincinnati Univ., OH. Dept. of Civil and Environmental Engineering.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
Portland cement type 1;
Solid waste disposal;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||Sorption is one of the important fixation mechanisms of metals in stabilized/solidified waste forms. In the present work, the sorption-desorption processes active in cement-based waste forms in acetic acid solutions were investigated. Experimental results indicated that the extent of sorption of a metal ion was strongly pH dependent. Cement-based waste forms had similar sorption characteristics as amphorous silica gel. The pH of the sorption edge is 5 to 6.5 for Pb(2+) and As(3+), 6 to 8.5 for Cd(2+), and 8 to 12 for Ca(2+). In addition, almost 90% of the lead and cadmium were leachable at pH 4.5, while nearly 30% of arsenic remained unleached at the same pH. (Copyright (c) Hazardous Waste and Hazardous Materials 1992.)
||Pub. in Hazardous Waste and Hazardous Materials, v9 n3 p289-296 1992. See also PB90-127473. Prepared in cooperation with Cincinnati Univ., OH. Dept. of Civil and Environmental Engineering. Sponsored by Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
|NTIS Title Notes
||Reprint: Sorption, Important in Stabilized/Solidified Waste Forms.
||PC A03/MF A01