Ferrate(VI) oxidation of zinc–cyanide complex

Yngard, Ria A.; Damrongsiri, Seelawut; Osathaphan, Khemarath; Sharma, Virender K.

doi:10.1016/j.chemosphere.2007.05.017

Cited by 70 publications

(56 citation statements)

References 27 publications

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“…In general, similar to the organic compounds the reaction with inorganic compounds (P) may be demonstrated as equation (26): where k P is the second-order rate constant for the reaction. It was found that the reactions of ferrate(VI) with cadmium(II)cyanide (Cd (CN) 4 2-), zinc(II)cyanide (Zn (CN) 4 2-), and selenite (SeO 3 2-) showed the following rate equations (27 and 28) [56,[66][67]. The order of ½ was found with respect to the concentrations of Cd(II) and Zn(II) cyanides (equation (27)).…”

Section: Application Of Fe(vi) For Inorganic Pollutantsmentioning

confidence: 99%

“…Potassium ferrate(VI) is an potential chemical to remove several metal cations/anions including Mn 2+ , Cu 2+ , Pb 2+ , Cd 2+ , Cr 3+ and Hg 2+ from aqueous solutions via oxidation/coagulation/adsorption process using lower dose of Fe(VI) 10-100 mg/L [79]. Similarly, the metal complexed species were studied and discussed previously particularly the metal(II) cyanide complexes [58,63,[66][67]]. An interesting study using Cu(II)and Ni(II) cyanide complexed were used and showed that complete degradation of cyanide along with the complete removal of free copper and partial removal of nickel (cf Figure16) [80].…”

Section: Removal Of Metal Cations/anionsmentioning

confidence: 99%

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Ferrate(VI) in the Treatment of Wastewaters: A New Generation Green Chemical

Tiwari¹,

Lee²

2011

Waste Water - Treatment and Reutilization

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Section: Application Of Fe(vi) For Inorganic Pollutantsmentioning

confidence: 99%

Section: Removal Of Metal Cations/anionsmentioning

confidence: 99%

Ferrate(VI) in the Treatment of Wastewaters: A New Generation Green Chemical

Tiwari¹,

Lee²

2011

Waste Water - Treatment and Reutilization

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“…Therefore, efforts to cleanup cyanide contamination are necessary to protect the health of the environment. Indeed, various remediation technologies ranging from intensive engineering techniques to bioremediation and/or phytoremediation have been developed through either a destructionbased process or a recovery-based process (White et al, 2000;Yngard et al, 2007). Unfortunately, most of engineering approaches have not been tested as a good alternative to large scale application (Smith and Mudder, 1991;Meeussen et al, 1992).…”

Section: Introductionmentioning

confidence: 99%

Photo induced dissociation of ferri and ferro cyanide in hydroponic solutions

Peng

Wang

2011

Int. J. Environ. Sci. Technol.

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ABSTRACT:The potential for photo-induced dissociation of ferri-and ferro-cyanide was investigated. The overall reactions followed first order kinetics, judged by the free cyanide analyzed in aqueous solution. The dissociation rates for ferri-and ferro-cyanide were mathematically described by the equations:respectively. In addition, photo-induced dissociation of both iron cyanides was enhanced under an alkaline environment than a neutral condition. Results from the temperature-dependent tests indicated that the dissociation rate of ferricyanide was significantly higher than that of ferro-cyanide at all treatment temperatures. The kinetic parameter, activation energy (E a ) was also experimentally determined to be 12.02 and 12.32 kJ/mol for ferri-and ferro-cyanide, respectively. The results obtained suggest that both iron cyanides are susceptible to photo-dissociation and the rates are positively correlated to the change of temperatures. The information collectively also has important implications for waste management of iron cyanides as well as for risk assessment in a field trial.

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“…Jambor et al (2009) illustrated that in metal rich sediments, CN -complexes of Fe and Cu were less soluble from sediments, whereas, CN -complexes of Ni and Zn are more soluble at pH values greater than 8. Thus, the dissolution of CN -salts and metal complexes from sediments, followed by aqueous transport during storm events, was likely to occur in addition to transport with suspended sediment (Jambor et al, 2009;Yngard et al, 2007).…”

Section: Trace Metals Metalloids and Anthropogenic Inputsmentioning

confidence: 99%

Mining Activities and Associated Environmental Impacts in Arid Climates: A Literature Review

Sims¹,

Hooda²,

Gillmore³

2013

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Mining operations have released measurable levels of geogenic trace metals (e.g. Cd, Cr, Pb), metalloids (e.g. As, Se), and anthropogenic chemicals (e.g. CN -, Hg) into surrounding sediments. Abandoned mining sites in hyperarid climates has not been the focus of much research compared to wet and temperate areas. Research has focused on historical mining sites in semiarid and wetter regions in the United States, south pacific and Europe. Those areas have obvious risks associated with them including aqueous phase mobilization as a result of abundant precipitation. However, many mining areas in the American Southwest and aboard are located in hyperarid regions and viewed as not having a potential for mobilization of contaminants. Seasonal storm events can mobilize sediments containing contaminates beyond a small, localized area and into the wider environment. Literature indicates that arid and hyperarid mining regions have not been studied as extensively as those in wetter climates.

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Ferrate(VI) oxidation of zinc–cyanide complex

Cited by 70 publications

References 27 publications

Ferrate(VI) in the Treatment of Wastewaters: A New Generation Green Chemical

Ferrate(VI) in the Treatment of Wastewaters: A New Generation Green Chemical

Photo induced dissociation of ferri and ferro cyanide in hydroponic solutions

Mining Activities and Associated Environmental Impacts in Arid Climates: A Literature Review

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