Accession Number : ADA184427

Title :   Critical Review of Cement-Based Stabilisation/Solidification Techniques for the Disposal of Hazardous Wastes.

Descriptive Note : Final rept. Mar-Dec 86,

Corporate Author : CLARK (A) AND ASSOCIATES TWICKENHAM (ENGLAND)

Personal Author(s) : Clark,Alistair

PDF Url : ADA184427

Report Date : Dec 1986

Pagination or Media Count : 56

Abstract : The materials used in stabilisation/solidification processes (OPC, PFA and sodium silicate) have been reviewed in terms of their basic composition and chemistry. The addition of inorganic wastes to OPC and PFA has been demonstrated to affect early hydration and has led to the development of the protective coating theory and sorption of heavy metals by PFA as the principal factors involved in stabilization. The aqueous chemistry of OPF, PFA, PFA/OPC and PFA/OPC/SILICATES has also been reviewed and has illustrated the chemical reactions taking place during the first hour of the stabilisation process. Methods to improve the efficiency of the Sealosafe processed have been highlighted particularly with respect to supernatant formation. New developments such as the use of clays have been highlighted.

Descriptors :   *WASTE TREATMENT, *CEMENTS, SOLID WASTES, HAZARDOUS MATERIALS, HEAVY METALS, STABILIZATION, SOLIDIFICATION, ASHES, SODIUM SILICATES, SORPTION, CLAY, AROMATIC COMPOUNDS, INTERACTIONS, GREAT BRITAIN

Subject Categories : Solid Wastes Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE