Solidification of hazardous wastes containing cyanide

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Cement and Concrete Research; (United States)

DOI:https://doi.org/10.1016/0008-8846(94)90195-3· OSTI ID:7038191

Hills, C D; Sollars, C J; Perry, R ^[1]

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1. Imperial Coll. of Science Technology and Medicine, London (United Kingdom). Centre for Environmental Control and Waste Management

Industrial sludges and residues are often solidified by cement-based solidification systems employing OPC (Ordinary Portland Cement). Metal plating wastes are considered compatible with OPC and have been processed using this binder for about 25 years. Recent research has shown that these wastes are capable of compromising OPC hydration reactions which are claimed to be responsible for effective solidification. Plating residues often contain significant levels of cyanide and when present in large quantities an oxidation process is employed to remove it. However, the potential exists for cyanide-containing wastes to be solidified and therefore the effect on the hydration of an OPC binder system is of importance. In a study to evaluate these effects, sodium cyanide has been added to OPC and has been found to retard hydration significantly. The retardation reaction was monitored by calorimetry, and XRD of the product showed that this was as a result of a complexation reaction involving iron.

• OSTI ID: 7038191
• Journal Information: Cement and Concrete Research; (United States), Journal Name: Cement and Concrete Research; (United States) Vol. 24:4; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
54 ENVIRONMENTAL SCIENCES
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
ALKALI METAL COMPOUNDS
BUILDING MATERIALS
CATALYTIC EFFECTS
CEMENTS
CYANIDES
HAZARDOUS MATERIALS
HYDRATION
INDUSTRIAL WASTES
INDUSTRY
INHIBITION
MANAGEMENT
MATERIALS
METAL INDUSTRY
PHASE TRANSFORMATIONS
PORTLAND CEMENT
PROCESSING
SODIUM COMPOUNDS
SOLIDIFICATION
SOLVATION
WASTE MANAGEMENT
WASTE PROCESSING
WASTES