Treatment Technology Evaluation for Aqueous Metal and Cyanide Bearing Hazardous Wastes (F007)

Hassan, Sardar Q.; Vitello, M.P.; Kupferle, Margaret J.; Grosse, Douglas

doi:10.1080/10473289.1991.10466871

Cited by 27 publications

(8 citation statements)

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“…the most regulated waste) when being disposed of. Therefore, the treatment of cyanide wastewaters before they are discharged into the waterways is attracting public and regulatory attention [1,2]. Different methods are currently available for cyanide destruction with different effectiveness, namely biological treatment [3,4], chemical oxidation [5,6], electrochemical oxidation [7][8][9], photocatalytic [10][11][12], and catalytic oxidation [13,14].…”

Section: Introductionmentioning

confidence: 99%

Catalytic oxidation of cyanides in an aqueous phase over individual and manganese-modified cobalt oxide systems

Christoskova¹,

Stoyanova²

2009

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Catalytic oxidation of cyanides in an aqueous phase over individual and manganese-modified cobalt oxide systems

Christoskova¹,

Stoyanova²

2009

Journal of Hazardous Materials

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“…usually contain free and metal complexed cyanides. Considering the acute toxicity of these species for living organisms, the treatment of cyanide wastewaters before they are discharged into the waterways is attracting public and regulatory attention [1,2]. The general waste treatment process is to oxidize the cyanide ions to carbon dioxide and nitrogen where their ease of oxidation maybe very dependent on the concentration of metals and other components in the waste streams.…”

Section: Introductionmentioning

confidence: 99%

Novel Ni−Fe-oxide systems for catalytic oxidation of cyanide in an aqueous phase

Stoyanova

Christoskova

2005

Open Chemistry

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Catalytic activity of mixed Ni-Fe oxide systems with respect to air oxidation of aqueous cyanide solution at 308 K was investigated. The catalysts employed were prepared by an oxidation-precipitation method at room temperature and were characterized by powder Xray diffraction (XRD), Mössbauer spectroscopy, and chemical analysis. The cyanide oxidation rate was found to be dependent on the catalyst's calcination temperature, pH of the medium, and catalyst loading. Results revealed that the catalyst calcined at 120 • C is the most active where up to 90 % of free cyanide (4 mM) was removed after oxidation for 30 minutes in the presence of 2.5 g/L catalyst at pH 9.5. The cyanide conversion becomes less favorable as the pH of the solution increases (with other constant parameters). The selectivity data showed that carbon dioxide is the main oxidation product, regardless of pH of the solution.

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“…[1][2][3] The treatment of cyanide wastes from mining operations, electroplating process, coal gasification and from other industries is attracting public and regulatory attention. 4,5 A number of studies have shown that cellulosic materials can adsorb metallic ions from aqueous and nonaqueous solutions. [6][7][8][9] Through the introduction of functional groups into cellulosic substrates, the adsorptive capacity for metallic ions may be enhanced [10][11][12] or retarded 7 depending on the nature of the ions and the functional groups.…”

Section: Introductionmentioning

confidence: 99%

Radiation‐induced graft copolymerization of cellulosic fabric waste and its application in the removal of cyanide and dichromate from aqueous solution

El-Kelesh

El‐Aal

Hashem

et al. 2007

J of Applied Polymer Sci

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Graft polymerization and crosslinking in radiation processing are attractive techniques for modification of the chemical and physical properties of the conventional polymer. The graft polymerization and subsequent chemical treatment can introduce a chelate agent function into a conventional polymer such as cellulosic fabric. Cellulosic graft copolymers were prepared by the reaction of the fiber with acrylonitrile (AN) and 2-acrylamido-2-methyl propane sulfonic acid (AMPS) in DMF initiated by g-radiation 60 Co. The grafted fabric was chemically treated with hydroxyl amine to obtain amidoxime from. Factors affecting the grafting such as radiation dose, monomer concentration and solvent concentration as well as monomer composition was investigated. The chemically modified graft fabric was applied for recovery of cyanide and dichromate from aqueous solution. CN À shows 89% removal, whereas dichromate has 65% removal.

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Treatment Technology Evaluation for Aqueous Metal and Cyanide Bearing Hazardous Wastes (F007)

Cited by 27 publications

References 0 publications

Catalytic oxidation of cyanides in an aqueous phase over individual and manganese-modified cobalt oxide systems

Catalytic oxidation of cyanides in an aqueous phase over individual and manganese-modified cobalt oxide systems

Novel Ni−Fe-oxide systems for catalytic oxidation of cyanide in an aqueous phase

Radiation‐induced graft copolymerization of cellulosic fabric waste and its application in the removal of cyanide and dichromate from aqueous solution

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