A systematic study of cement/PFA chemical stabilisation/solidification process for the treatment of heavy metal waste

Chi Sun Poon; K. W. Lio; C. I. Tang

doi:10.1177/0734242X0101900403

A systematic study of cement/PFA chemical stabilisation/solidification process for the treatment of heavy metal waste

Chi Sun Poon, K. W. Lio, C. I. Tang

Research output: Journal article publication › Journal article › Academic research › peer-review

23 Citations (Scopus)

Abstract

The aim of this study is to systematically quantify the physical and chemical properties of the cement based solidified/stabilised heavy metal waste with increasing replacement of cement by PFA. Bulk density and unconfined compressive strength are measured as the physical parameters. The equilibrium extraction tests, sequential chemical tests and dynamic leaching tests are reported as chemical characteristics. The results showed PFA-blended cement-based waste forms have higher porosity and lower strength than the pure cement-based waste forms at experimental curing time. The lower alkalinities of the PFA-blended cement-based waste forms, however, lead to higher leach rates of heavy metals when the waste is exposed to an acidic medium.

Original language	English
Pages (from-to)	276-283
Number of pages	8
Journal	Waste Management and Research
Volume	19
Issue number	4
DOIs	https://doi.org/10.1177/0734242X0101900403
Publication status	Published - 1 Jan 2001

Keywords

Cement
Chemical stabilisation
Hazardous waste
PFA
Solidification

ASJC Scopus subject areas

Environmental Engineering
Pollution

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1177/0734242X0101900403

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AB - The aim of this study is to systematically quantify the physical and chemical properties of the cement based solidified/stabilised heavy metal waste with increasing replacement of cement by PFA. Bulk density and unconfined compressive strength are measured as the physical parameters. The equilibrium extraction tests, sequential chemical tests and dynamic leaching tests are reported as chemical characteristics. The results showed PFA-blended cement-based waste forms have higher porosity and lower strength than the pure cement-based waste forms at experimental curing time. The lower alkalinities of the PFA-blended cement-based waste forms, however, lead to higher leach rates of heavy metals when the waste is exposed to an acidic medium.

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A systematic study of cement/PFA chemical stabilisation/solidification process for the treatment of heavy metal waste

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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