Sorption, important in stabilized/solidified waste forms

Technical Report · Sat Jan 01 04:00:00 EST 1994

OSTI ID:7273009

Cheng, K Y; Bishop, P L

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.)

• Research Organization: Dames and Moore, Cincinnati, OH (United States)
• OSTI ID: 7273009
• Report Number(s): PB-94-155256/XAB
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
LAWS
PHASE TRANSFORMATIONS
POLLUTION LAWS
SOLID WASTES
SOLIDIFICATION
SORPTION
STABILIZATION
TECHNOLOGY ASSESSMENT
US SUPERFUND
WASTES