Simultaneous oxidation of cyanide and thiocyanate at high pressure and temperature

Oulego, Paula; Collado, Sergio; Laca, Adriana; Dı́az, Mario

doi:10.1016/j.jhazmat.2014.08.051

Cited by 24 publications

(2 citation statements)

References 45 publications

(58 reference statements)

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“…Similar results have been reported in which the addition of cellobiose or phenol to solutions containing recalcitrant low molecular weight acids led to enhanced oxidation rates [16]. The degradation rate of thiocyanate was also significantly enhanced when it was simultaneously oxidized with cyanide under the same conditions [17]. We also reported that the presence of phenol in the reaction media greatly improves the conversion of NB [18,19], and that the simultaneous degradation of trichlorophenol and nitrophenol is possible by wet air co-oxidation [20].…”

Section: Introductionsupporting

confidence: 86%

Simultaneous removal of nitrobenzene and phenol by homogenous catalytic wet air oxidation

Zhang

Wang

et al. 2015

Chinese Journal of Catalysis

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Section: Introductionsupporting

confidence: 86%

Simultaneous removal of nitrobenzene and phenol by homogenous catalytic wet air oxidation

Zhang

Wang

et al. 2015

Chinese Journal of Catalysis

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“…Thiocyanate can also react with photogenerated O-radicals yielding hypothiocyanite (r18) and thiocyanogen (r19) [28]. Both species are rapidly hydrolyzed, leading to the formation of thiocyanate, cyanide, and sulfates (r14) [29].…”

Section: Resultsmentioning

confidence: 99%

Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater

et al. 2019

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We have explored the simultaneous degradation of cyanides and thiocyanate present in wastewaters from a cokemaking factory using photoassisted methods under varied illumination conditions (from simulated solar light to UV light). Overall, the photochemical degradation of cyanides was more efficient than that of thiocyanates, regardless of the illumination conditions, the effect being more pronounced in the absence of a photocatalyst. This is due to their different degradation mechanism that in the case of thiocyanates is dominated by fast recombination reactions and/or charge transfer reactions to electron scavengers. In all cases, cyanate, ammonia, nitrates, and nitrites were formed at different amounts depending on the illumination conditions. The conversion yield under simulated solar light was almost complete for cyanides and quite high for thiocyanates after 6 h of illumination. Regarding toxicity, photochemical oxidation at 254 nm and under simulated solar light decreased significantly the toxicity of the pristine wastewater, showing a correlation with the intensity of the irradiation source. This indicate that simulated light can be effectively used to reduce the toxicity of industrial effluents, opening an interesting perspective for optimizing cyanide detoxification systems based on natural light.

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Kinetics of Thiocyanate Formation by Reaction of Cyanide and Its Iron Complexes with Thiosulfate

Kurashova

Kamyshny

2019

Aquat Geochem

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Simultaneous oxidation of cyanide and thiocyanate at high pressure and temperature

Cited by 24 publications

References 45 publications

Simultaneous removal of nitrobenzene and phenol by homogenous catalytic wet air oxidation

Simultaneous removal of nitrobenzene and phenol by homogenous catalytic wet air oxidation

Photochemical Degradation of Cyanides and Thiocyanates from an Industrial Wastewater

Kinetics of Thiocyanate Formation by Reaction of Cyanide and Its Iron Complexes with Thiosulfate

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