State-of-the-art review of FGD sludge stabilization using lime/fly-ash admixtures

Conference · Sun Jan 01 04:00:00 EST 1978 · Proc., Annu. Meet., Air Pollut. Control Assoc.; (United States)

OSTI ID:6786246

Weeter, D W

A state-of-the-art review of FGD sludge stabilization using lime/fly-ash admixtures covers recent experimental results on the improvement of physical and strength characteristics of scrubber sludges stabilized by fly ash alone or in combination with lime, cement or silica; chemical analyses of leachates from FGD sludges fixed by fly ash and lime; and data on crystalline structure of raw and fixed sludges obtained by scanning electron microscopy, X-ray diffraction, and energy dispersion X-ray analysis. The stabilized sludges appear to attain reasonable strength and relatively low permeability, but some chemical species present in the leachates, such as lead, mercury, copper, selenium, chloride, and sulfate, may pose environmental problems. The final fixed sludge matrix appears to be a mixture of ettringite, tobermorite, calcium aluminosilicate, and calcium hydroxide.

• Research Organization: Univ. of Tennessee
• OSTI ID: 6786246
• Report Number(s): CONF-780636-
• Conference Information: Journal Name: Proc., Annu. Meet., Air Pollut. Control Assoc.; (United States) Journal Volume: 78-57.1
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AEROSOL WASTES
ALKALINE EARTH METAL COMPOUNDS
ASHES
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CHEMICAL ANALYSIS
CRYSTAL STRUCTURE
DISPERSIONS
DOCUMENT TYPES
EQUIPMENT
FLY ASH
LEACHATES
MIXTURES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
RESIDUES
REVIEWS
SCRUBBERS
SLUDGES
SOLUTIONS
STABILIZATION
STRUCTURAL CHEMICAL ANALYSIS
TECHNOLOGY ASSESSMENT
WASTES