Hydrogen Cyanide Formation on the Analysis of Total Cyanide and Free Cyanide and Improvements of Pretreatment Method of Total Cyanide

Nonomura, Makoto

doi:10.2116/bunsekikagaku.58.57

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…Nonomura has reported that cyanides were detected from cyanide-free solutions such as an electroless nickel deposition baths. 20 Recently, high concentrations of cyanide of 1 g/dm 3 were confirmed in a zinc-nickel alloy bath that contained amine and hydrocarbon. 21 The report described that cyanide was synthesized by an anode reaction.…”

Section: Introductionmentioning

confidence: 99%

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Cyanide Detection from Nickel Electrodeposited in Modified Watts Baths Including Glycine and Cyanide Production at Anodic Sides in the Baths

et al. 2016

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Nickel films were electrodeposited from modified Watts baths including glycine of 0.2 mol/l and ammonium sulfate of 0.2 mol/l. Nickel electrodeposits were examined using temperature-programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS). Higher peaks of m/z = 27 and 52 derived from cyanides were recognized in TPD contour maps of nickel electrodeposits. Furthermore, the XPS N1s spectrum implied that cyanides were present on nickel electrodeposits. Free cyanide ions and total cyanides were detected from glycine solutions using commercial test after electric current of 5 A/cm 2 was applied for five hours. To ascertain the electrode side at which cyanides were generated, a salt bridge was arranged between an anode chamber and a cathode chamber, consisting of glycine solution. Results show that cyanides were produced at the anode side after electric current was applied to electrodes in the chambers. These results suggest that cyanides were produced by oxidation of glycine at nickel or platinum anodes in Watts baths including glycine, which was induced by the application of electric currents. Moreover, cyanides remained on nickel electrodeposits after rinsing in water for 10 min as well as electrodeposition baths.

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Section: Introductionmentioning

confidence: 99%

“…Cyanide ions are reportedly to be stable in pH higher than 12 in the electrolyte. 20 Consequently, some of cyanide Electrochemistry, 84(6), 394-397 (2016) ions might volatilize as hydrogen cyanides because pH of 8.5 is used in this study. Moreover, cyanides in electrodeposition baths were incorporated in nickel electrodeposits.…”

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Cyanide Detection from Nickel Electrodeposited in Modified Watts Baths Including Glycine and Cyanide Production at Anodic Sides in the Baths

et al. 2016

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The adsorption of CN− on B-doped carbon nanotubes: The first-principles study

Guo

Zhang

2022

Mod. Phys. Lett. B

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The first-principles method based on density functional theory has been used to investigate the adsorption performance of cyanide ions on intrinsic and B-doped carbon nanotubes (CNTs). We first investigate the effect of B-doping on the reactivity of CNTs. It is found that B-doping enhances the reactivity of CNTs while it ensures the structure of the doped CNTs is stable. Then, we perform a comparative analysis of various indices for each adsorption system. The results show that the adsorption effect of intrinsic CNTs on cyanide ions is weak, and there exists only physical adsorption between them. After B-doping, the adsorption energy between CNTs and cyanide ions increases by 87.6–122.8%, and the adsorption distance decreases substantially. The analysis of the energy band structure, partial density of states (PDOS) and charge density shows that the [Formula: see text]-orbital electrons of both C and N atoms in CN[Formula: see text] are filled into the [Formula: see text]-hybrid orbital of the B atom and the effective overlap of charges of each adsorption system is greatly increased as well. Therefore, the adsorption effect of B-doped CNTs on cyanide ions is greatly enhanced, and there is chemical adsorption formed between them. In addition, through analyzing the geometric structure and PDOS of each adsorption system, it can be seen that the adsorption effect of B-doped CNTs on the C atom in CN[Formula: see text] is better than that on the N atom. This study shows that B-doped CNTs can be used as an effective adsorbing or sensing material for CN[Formula: see text] in wastewater.

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Distillation Method Using Copper(II) Chloride and Tin(II) Chloride for the Determination of Total Cyanide Content in Soil

et al. 2011

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Hydrogen Cyanide Formation on the Analysis of Total Cyanide and Free Cyanide and Improvements of Pretreatment Method of Total Cyanide

Cited by 3 publications

References 11 publications

Cyanide Detection from Nickel Electrodeposited in Modified Watts Baths Including Glycine and Cyanide Production at Anodic Sides in the Baths

Cyanide Detection from Nickel Electrodeposited in Modified Watts Baths Including Glycine and Cyanide Production at Anodic Sides in the Baths

The adsorption of CN− on B-doped carbon nanotubes: The first-principles study

Distillation Method Using Copper(II) Chloride and Tin(II) Chloride for the Determination of Total Cyanide Content in Soil

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