Paper Information

Title: 

DECYANIDE OF MUTEH WASTEWATER USING HYDROGEN PEROXIDE

Type: PAPER
Author(s): TEYMOURI P.*,KHODADADI A.,ABDOLLAHI M.
 
 *TARBIAT MODARES UNIVERSITY
 
Name of Seminar: PROCEEDING OF IRANIAN MINING ENGINEERING CONFERENCE
Type of Seminar:  CONFERENCE
Sponsor:  IRANIAN SOCIETY OF MINING ENGINEERING
Date:  2005Volume 1
 
 
Abstract: 

Cyanide is used by the mining industries in tremendous quantities, without considering most environmental. The use of cyanide compounds in mining is one of the most important environmental issues due to the acutely toxic properties of many cyanide compounds to humans and acute life. Cyanide readily combines with most major and trace metals, a property that makes it useful in metals extracting from ores. Cyanide also tends to react with most other chemical elements, producing a wide variety of toxic, cyanide-related compounds. Cyanide is a carbon based-an organic compound. it reacts readily with other carbon-based matters, including living organisms. This research atemptes to at investigate a feasible and economical technique for the removal of cyanide from tailing wastewater at Muteh gold mine factory.
Cyanide removal from Muteh factory’s waste water, was achieved at the Tarbiat Modares University’s mineral processing laboratory using cyanide oxidation by hydrogen peroxide and using a catalyst, such as copper sulfate. Hence, cyanide oxidizes and changes to cyanate (CNO-) which its environmental hazards are 1000 times less than cyanide. The optimum dose of hydrogen peroxide for complete cyanide removal in the presence of 30 mg/lit copper sulfate (as catalyst), was 9.98gr/lit and optimum pH was determined (9.7). at high temperatures (temperatures more than 35oC), cyanide removes perfectly (at constant pH=9.7) which is mainly due to cyanide evaporation in form of HCN. Cyanide concentration in Muteh’s wastewater was determined by Rhodanine indicator solution regarding the standard titration method.

 
Keyword(s): DECYANIDATION, COPPER SULFATE, HYDROGEN PEROXIDE, OPTIMUM PH, CYANIDE, WASTEWATER
 
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