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Waste Management & Research
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Optimization of Cement-Based Stabilization/Solidification of Organic-Containing Industrial Wastes Using Organophilic Clays

D.M. Montgomery

Centre for Toxic Waste Management, Imperial College, London SW72BU, U.K.

C.J. Sollars

Centre for Toxic Waste Management, Imperial College, London SW72BU, U.K.

R. Perry

Centre for Toxic Waste Management, Imperial College, London SW72BU, U.K.

The treatment of organically contaminated industrial wastes by cement-based stabilization/solidification has, in the past, been restricted by the detrimental effect of organic compounds on cement hydration. This work investigates the use of organophilic clays as adsorbents for the organic components of industrial wastes prior to conventional cement-based solidification. Three industrial wastes containing between 2-12% organic carbon and trace heavy metal contamination were treated with a quaternary ammonium salt exchanged clay. The organic component of all three wastes was well adsorbed by the clay. Solidification of the waste/clay mixes produced a monolithic mass with adequate strength and very low leaching of either the organic compounds or the metals. This study has shown that organophilic clays can act as successful adsorbents for the organic contaminants of industrial wastes and enable them to be treated by cement-based solidification.

Key Words: Industrial wastes • adsorption • organics • organophilic clays • cement-based solidification • leaching • compressive strength

Waste Management & Research, Vol. 9, No. 1, 21-34 (1991)
DOI: 10.1177/0734242X9100900103
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D.M. Montgomery, C.J. Sollars, R. Perry, S.E. Tarling, P. Barnes, and E. Henderson
Treatment of Organic-Contaminated Industrial Wastes Using Cement-Based Stabilization/Solidification-- Ii. Microstructural Analysis of the Organophilic Clay as a Pre-Solidification Adsorbent
Waste Management Research, January 1, 1991; 9(1): 113 - 125.
[Abstract] [PDF]