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Title: Destruction of cyanide waste solutions using chlorine dioxide, ozone and titania sol

Increasingly, there are severe environmental controls in the mining industry. Because of lack of technological advances, waste management practices are severely limited. Most of the wastes in the milling industrial effluents are known to contain cyanides and it is recognized that after extraction and recovery of precious metals, substantial amounts of cyanide are delivered to tailings ponds. The toxicity of cyanide creates serious environmental problems. In this paper we describe several methods for the treatment of cyanide solutions. These include: (1) cyanide destruction by oxidation with chlorine dioxide (ClO{sub 2}) in a Gas-Sparged Hydrocyclone (GSH) reactor; (2) destruction of cyanide by ozone (O{sub 3}) using a stirred batch reactor, and finally, (3) the photolysis of cyanide with UV light in presence of titania sol. In all cases excellent performance were observed as measured by the extent and of the destruction.
Authors:
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Publication Date:
OSTI Identifier:
20875595
Resource Type:
Journal Article
Resource Relation:
Journal Name: Waste Management; Journal Volume: 23; Journal Issue: 2; Other Information: DOI: 10.1016/S0956-053X(02)00064-8; PII: S0956053X02000648; Copyright (c) 2003 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; CHLORINE; CHLORINE OXIDES; CYANIDES; LIQUID WASTES; MILLING; MINERAL INDUSTRY; OXIDATION; OZONE; PHOTOLYSIS; PONDS; SOLS; TAILINGS; TITANIUM OXIDES; TOXICITY; WASTE MANAGEMENT