RATIONAL USE OF CEMENT-BASED STABILIZATION TECHNIQUES FOR THE DISPOSAL OF HAZARDOUS WASTES.

Alistair I. Clark, Chi Sun Poon, Roger Perry

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)

Abstract

The mechanism of zinc and mercury fixation by a cement/sodium silicate stabilization process has been assessed from leaching, scanning electron microscopy, X-ray diffraction and porosimetry studies. The results of these tests correlate closely and suggest the operation of two separate fixation mechanisms. The presence of zinc has a significant effect upon the hydration and final physical properties of the final product. Mercury and related metals which do not form precipitates at elevated pH levels are held in pore solution. The importance of microstructure in metal fixation and also metal leaching from the cementitious matrix has also been demonstrated. The calcium aluminate hydrate structure, ettringite, has been identified as to be related to the structural integrity of the solidified product.
Original languageEnglish
Title of host publicationUnited States Environmental Protection Agency, Office of Research and Development, (Report) EPA
PublisherEPA
Pages339-347
Number of pages9
Publication statusPublished - 1 Dec 1985
Externally publishedYes
EventProceedings - International Conference on New Frontiers for Hazardous Waste Management. - Pittsburgh, PA, United States
Duration: 1 Dec 1985 → …

Conference

ConferenceProceedings - International Conference on New Frontiers for Hazardous Waste Management.
Country/TerritoryUnited States
CityPittsburgh, PA
Period1/12/85 → …

ASJC Scopus subject areas

  • Engineering(all)

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