Use of flue gas desulphurisation (FGD) waste and rejected fly ash in waste stabilization/solidification systems
Journal Article
·
· Waste Management
- Department of Civil and Structural Engineering, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong (China)
- Department of Civil and Environmental Engineering, Imperial College, London SW7 2BU (United Kingdom)
Stabilization/solidification (S/S) processes have been used as the final treatment step for hazardous wastes prior to land disposal. Fly ash is a by-product of coal-fired power generation; a significant proportion of this material is low-grade, reject material (rFA) that is unsuitable as a cement replacement due to its high carbon content and large particle size (>45 {mu}m). Flue gas desulphurization (FGD) sludge is a by-product from the air pollution control systems used in coal-fired power plants. The objective of this work was to investigate the performance of S/S waste binder systems containing these two waste materials (rFA and FGD). Strength tests show that cement-based waste forms with rFA and FGD replacement were suitable for disposal in landfills. The addition of an appropriate quantity of Ca(OH){sub 2} and FGD reduces the deleterious effect of heavy metals on strength development. Results of TCLP testing and the progressive TCLP test show that cement-rFA-Ca(OH){sub 2} systems with a range of FGD additions can form an effective S/S binder. The Leachability Index indicates that cement-based waste forms with rFA replacement were effective in reducing the mobility of heavy metals.
- OSTI ID:
- 20877400
- Journal Information:
- Waste Management, Journal Name: Waste Management Journal Issue: 2 Vol. 26; ISSN WAMAE2; ISSN 0956-053X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Feasibility of using reject fly ash in cement-based stabilization/solidification processes
Durability of incinerator ash waste encapsulated in modified sulfur cement
An evaluation of the solidification/stabilization of industrial arsenic containing waste using extraction and semi-dynamic leach tests
Journal Article
·
Sat Jan 14 23:00:00 EST 2006
· Environmental Engineering Science
·
OSTI ID:20712185
Durability of incinerator ash waste encapsulated in modified sulfur cement
Conference
·
Mon Dec 31 23:00:00 EST 1990
·
OSTI ID:6019983
An evaluation of the solidification/stabilization of industrial arsenic containing waste using extraction and semi-dynamic leach tests
Journal Article
·
Mon Dec 30 23:00:00 EST 1996
· Waste Management
·
OSTI ID:544132