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Regeneration of cyanide by ozone oxidation of thiocyanate ...

CIM Bulletin, 77, 87 (1984). Scott J.S. An Overview of Cyanide Treatment Methods for Gold Mill Effluents. Conference on Cyanide and the Environment. Tucson Arizona. U.S.A. (1984). Scott, J.S., State-of-the-Art of Processes for Treatment of GoM Mill Effluents. Unpublished report of the Environmental Protection Service. Environment Canada, (1987).

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Cyanide Destruction Methods and Processes

Detoxification processes are used to reduce the concentrations of toxic constituents in tailings streams and process solutions, either by dilution, removal, or conversion to a less toxic chemical form (sometimes referred to as"destruction" or "degradation" in the case of toxic cyanide species). The objective is to produce an effluent that meets limits or guidelines that …

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Removal of ammonium and nitrate from cold inorganic mine ...

Destruction of cyanide in gold mill effluents: biological versus chemical treatment Biotechnology Advances, 21 ( 6 ) ( 2003 ), pp. 501 - 511 Article Download PDF View Record in Scopus Google Scholar

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Figure 4 from Destruction of cyanide by hydrogen peroxide ...

DOI: 10.1016/J.MINENG.2004.06.003 Corpus ID: 98255950. Destruction of cyanide by hydrogen peroxide in tailings slurries from low bearing sulphidic gold ores @article{Kitis2005DestructionOC, title={Destruction of cyanide by hydrogen peroxide in tailings slurries from low bearing sulphidic gold ores}, author={M. Kitis and A. Akcil and E. Karakaya …

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Destruction of cyanide in gold mill effluents: biological ...

Destruction of cyanide by microorganisms in gold mill effluents is a natural process that can be readily exploited and engineered to accommodate the large flows and elevated cyanide containing solutions generated at commercial precious metals …

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Cyanide and removal options from effluents in gold mining ...

At an optimal gold extraction pH of 10.5 or greater, most of the free cyanide in the solution is in the form of the cyanide anion (CN − ), where cyanide loss by volatilization is limited. Otherwise, the cyanidation process would neither be practical and safe nor economically and environmentally feasible.

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Determination and detoxification of cyanide in gold mine ...

The cyanide species in the gold tailings are classified as free cyanide, weak acid dissociation, and metallocyanide complexes. Several methods, such as colorimetric, titrimetric, and electrochemical, have been developed to determine …

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Cyanide removal from aqueous streams - INCO Limited

An example of single stage continuous cyanide and arsenic removal from gold mill effluent containing a high arsenic concentration in solution, using Na 2 S 2 O 5, Cu + +, Fe + ++, air and lime as the reagents is shown in Table XXIV. In this approach, all reagents are added simultaneously to perform cyanide and metal removal at pH 6. EXAMPLE 24

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CYANIDE REMEDIATION: CURRENT AND PAST …

Cyanide (CN-) is a toxic species that is found predominantly in industrial effluents generated by metallurgical operations. Cyanide's strong affinity for metals makes it favorable as an agent for metal finishing and treatment and as a lixivant for metal leaching, particularly gold. These technologies are environmentally sound but require

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Water | Free Full-Text | Removal of Cyanide and Other ...

Mining operations generate effluents containing pollutants such as ammonia, nitrite and nitrate as a result of blasting operations. Cyanide compounds such as free cyanide, cyanate and thiocyanate are also present when cyanide is used in the gold recovery process. In most cases, mine effluent stored in the ponds eventually needs to be discharged to the environment; …

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Destruction of cyanide in gold mill effluents: biological ...

Although cyanide can be destroyed and recovered by several processes, it is still widely discussed and examined due to its potential toxicity and environmental impact. Biological treatment of cyanide is a well-established process and has been commercially used at gold mining operations in North America.

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Destruction of cyanide in gold mill effluents: biological ...

The present review describes the advances in the use of biological treatment for the destruction of cyanide in gold mill effluents. Full text links . Read article at publisher's site (DOI): 10.1016/s0734-9750(03)00099-5. References . Articles referenced by this article (23) Cyanide versus environment: Turkey's final decision.

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CYANIDE CONTROLLING IN TAILINGS POND: OVACIK GOLD …

/AIR cyanide destruction ... Typically the pH of these solutions as they come out of theb mill are 10.0 or ... periodical cyanide concentrations in the treated effluent at the Ovacik Gold Mine

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Modeling of SO2/air cyanide destruction process | SpringerLink

The purpose of this study was to develop a mathematical model to describe the oxidation of cyanide with SO2, as proposed in the Inco Process. This research employed a direct method for measuring the change in cyanide concentration, with respect to time, as affected by varying pH, temperature and concentrations of SO2 and copper. This model may have …

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Recovering Cyanide From Gold Plant Tailings

cyanide destruction, coupled with the introduction of legislation to seriously limit the discharge of cyanide to the environment in most gold-producing regions of the world, many companies are evaluating the cyanide . recovery alternative. There is arguably an even more compelling reason for mining companies to consider cyanide recycling. With

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Figure 4 from A case study of CIP tails slurry treatment ...

In this paper two cyanide recovery/destruction technologies, namely the Cyanisorb process and the INCO SO2/Air process, are evaluated for the treatment of waste cyanide effluents from a gold mill of 12,000 tonnes of ore per day capacity. The comparison is made for CIP tails slurry of variable concentrations of free and weakly-complexed cyanide.

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The current and future applications of microorganism in ...

Destruction of cyanide in gold mill effluents: biological versus chemical treatments. Biotechnol. Adv. 21:501–511. PubMed CAS Google Scholar Akcil A. and Mudder T. (2003). Microbial destruction of cyanide wastes in …

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Novel cyanide electro-biodegradation using Bacillus ...

Akcil A. Destruction of cyanide in gold mill effluents: biological versus chemical treatments. Biotechnol Adv. 2003; 21:501–511. doi: 10.1016/S0734-9750(03)00099-5. [Google Scholar] 13. Kumar V, Kumar V, Bhalla TC. In vitro cyanide degradation by Serretia marcescens RL2b. Int J Environ Sci. ...

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Cyanide Degradation from Mining Effluent Using Two ...

This research aimed to degrade free cyanide (CNL) present in the tailing of a metallurgical plant that processes gold-bearing ores and uses sodium cyanide (NaCN) as a leaching reagent. Sodium metabisulfite (Na 2 S 2 O 5) and sodium metabisulfite with hydrogen peroxide (Na 2 S 2 O 5 + H 2 O 2) were used as oxidizing agents.

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(PDF) Spectrophotometric determination of cyanate and ...

Figure 2: Cyanate ion profile along the stream receiving effluent from the gold mine in June 2008. Figure 3: Ammonia gas profile along the stream receiving effluent from the gold mine in June 2008 A steep drop was also observed in both patterns, between points 2 and 3, 4 and 5 in Figure 2 and points 3 and 4 in Figure 3.

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Destruction of cyanide and thiocyanate by ferrate[Iron (VI ...

Destruction of cyanide resulted in cyanate while sulfate and cyanate were the products of thiocyanate oxidation. ... is highly efficient for removal of …

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Destruction of cyanide and thiocyanate by ferrate [Iron(VI)]

Destruction of cyanide and thiocyanate by ferrate [Iron(VI)] V.K. Sharma* Chemistry Department, Florida Institute of Technology, 150 West University Boulevard, Melbourne, Florida 32901, U.S.A. Received 28 August 2002; accepted 1 March 2003 ABSTRACT A cyanide-laden effluent of the gold mining industry must be treated before it can be released to the

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Modeling of natural cyanide attenuation in tailings ...

Destruction of cyanide in gold mill effluents: Biological versus chemical treatments. Article. ... "Development of a Model to Describe the Natural Degradation of …

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CSIRO PUBLISHING | Microbiology Australia

[5] Akcil, A. (2003) Destruction of cyanide in gold mill effluents: biological versus chemical treatments. Biotechnol. Adv. 21, 501–511. | Destruction of cyanide in gold mill effluents: biological versus chemical treatments. Crossref | GoogleScholar Google Scholar |

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Destruction of cyanide in gold mill effluents: Biological ...

In gold mining, cyanide has been the preferred lixiviant worldwide since 1887. Although cyanide can be destroyed and recovered by several processes, it …

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A case study of CIP tails slurry treatment: comparison of ...

In this paper two cyanide recovery/destruction technologies, namely the Cyanisorb process and the INCO SO2/Air process, are evaluated for the treatment of waste cyanide effluents from a gold mill of 12,000 tonnes of ore per day capacity. The comparison is made for CIP tails slurry of variable concentrations of free and weakly-complexed cyanide.

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Energy efficient—Advanced oxidation process for treatment ...

The time required for destruction of CN from 10 mg/L up to 0.02 mg/L (safe limit) varied between 0.7 ± 0.03 and 4.7 ± 1.2 h for H 2 O 2 ( Fig. 2 ), while for O 3 it was between 3.6 ± 0.1 and 6.0 ± 0.2 h ( Fig. 3 ). For both the oxidants, total treatment time depended on the concentration up to a point, beyond which there was no significant change.

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gold mill cyanide addition - pranieobal.pl

Destruction of cyanide in gold mill effluents biological. Know More . Biotreatment of cyanide and associated species such as ammonia and thiocyanate in gold mill effluents is a natural process and can be readily exploited to handle large flows and cyanide concentrations found in commercial gold operations...

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Biodegradation of cyanide via recombinant cyanide ...

Despite its high toxicity, cyanide is used in several industrial processes, and as a result, large volumes of cyanide wastewater need to be treated prior to ...

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Kinetics of natural degradation of cyanide from gold mill ...

The oldest treatment method practiced by Canadian gold mines for cyanide destruction is "natural degradation". Based on the literature review of the previous studies, the most important mechanism in the natural degradation of cyanide was ... solutions, has been applied to actual gold mill effluents. Results show that the model can be used for ...

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US4966715A - Process for the removal of cyanide from ...

US4966715A US07/354,039 US35403989A US4966715A US 4966715 A US4966715 A US 4966715A US 35403989 A US35403989 A US 35403989A US 4966715 A US4966715 A US 4966715A Authority US United States Prior art keywords cyanide hydrogen peroxide phosphoric acid wastewater concentration Prior art date Legal status (The legal status is an …

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Destruction of cyanide in gold mill effluents: biological ...

Biological treatment processes facilitate growth of microorganisms that are essential for the treatment. The present review describes the advances in the use of biological treatment for the destruction of cyanide in gold mill effluents.

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(PDF) Cyanide Degradation from Mining Effluent Using Two ...

[4] A. Akcil, "Destruction of cyanide in gold mill effluents: biological 0 10 20 30 versus chemical treatments," Biotechnology Advances, vol. 21, Test order pp. 501-511, 2003.