Kinetics and thermodynamics of cyanide removal by ZnO@NiO nanocrystals

Pirmoradi, Mysam; Hashemian, Saeedeh; Shayesteh, Mohammad Reza

doi:10.1016/s1003-6326(17)60160-2

Cited by 51 publications

(33 citation statements)

References 45 publications

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“…Adsorption technology is a known and famous process and is an effective way of treating municipal and industrial effluents. The adsorption method either in the batch or continuous mode is a very efficient method for removing the cyanide ion from wastewater because it is a simple method comparing to other methods of treatment and does not require large operational costs in addition to the high removal percent obtained due to this process especially when using activated carbon [26][27][28][29]. However, since activated carbon is considered to be a high cost, researchers have sought cheaper cost alternatives to this material.…”

Section: Issn: 1813 -1662 (Print) E-issn: 2415 -1726 (On Line)mentioning

confidence: 99%

UTILITY OF CYANIDE ION REMEDIATION RESIDUES TO PREPARE ACTIVE RODENTICIDE ACCESSING TO ZERO RESIDUE LEVEL: SPRAGUE DAWLEY RATS Rattus rattus AS CASE STUDY

Sabbar¹,

Mohammed²,

Hussain³

et al. 2018

Tikrit J. Pure Sci.

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This study was examined the possibility of pomegranate peel residue (PPR) (which remains after extraction of antioxidants (phenolics)) for removing polluted cyanide ions from aqueous solutions using several operational factors via adsorption technique. The operational factors studied included initial concentration of (CN -), pH of aqueous solution, flowrate of the aqueous solution inside the adsorption unit, height of adsorption media and time of treatment. By means of changing the aforementioned variables within particular empirical ranges, the best operational conditions were identified that gave the highest percentage removal of cyanide ion from aqueous solutions which reach to 95.75%. The samples of PPR remaining after completion the adsorption process explained above have been used to prepare an effective toxic material for rodents. The lethal effect of this cheap rodenticide was investigated using laboratory rats of type Sprague Dawley (which has the scientific name Rattus rattus) as a case study. These toxic residues exhibited a fatal effect on this type of rats depending on the calculated half lethal dose (LD50) of its which was compared with the (LD50) mentioned in literature and scientific references and showed that it was within the required range. In this method, more than one type of toxic and nontoxic wastes was disposed by simple, benefit, non-cost and environment friendly way. This way represents by eliminating the cyanide ions from aqueous solutions to minimum possible concentration using nonvaluable agricultural wastes (PPR) and in the same time preparing a cheap and active rodenticide according to lethal dose (LD50) calculated accessing to zero residue level (ZRL). Initial Concentration of CNion (ppm) % Removal 60 66 72 78 84 90 96 0 15 30 45 60 75 90 105

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Section: Issn: 1813 -1662 (Print) E-issn: 2415 -1726 (On Line)mentioning

confidence: 99%

UTILITY OF CYANIDE ION REMEDIATION RESIDUES TO PREPARE ACTIVE RODENTICIDE ACCESSING TO ZERO RESIDUE LEVEL: SPRAGUE DAWLEY RATS Rattus rattus AS CASE STUDY

Sabbar¹,

Mohammed²,

Hussain³

et al. 2018

Tikrit J. Pure Sci.

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“…ZnO-NiO composite is one of the most important photocatalytic systems, which has attracted a lot of interest. Some researchers indicated the development of properties and e ciency of these materials by compositing [15,16].…”

Section: Introductionmentioning

confidence: 99%

Ternary hybrid formation and Photocatalytic activity of NiO/CuO/TiO2 microstructure over textile azo dye under solar light irradiation

Sivakumar¹,

Muthamilarasu²,

Divya³

et al. 2021

Preprint

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The photocatalytic degradation and mineralization of ReactiveOrange30 on NiO/CuO/TiO2 ternary composites has been studied using solar light irradiation. This NiO/CuO/TiO2 ternary composites were prepared by different mass ratios of NiO and CuO/TiO2(3wt% to 15wt.%) on the ethonalic dispersion and annealed at 300˚ C. SEM, UV- Vis DRS, PL, XRD and FTIR analysis has used to characterize the all photocatalysts. NiO/CuO/TiO2 ternary composites demonstrate enhanced photocatalytic activity than NiO/TiO2, CuO/TiO2and pure TiO2 due to separation of photogenerated electrons and holes charges. The NiO/CuO/TiO2ternary composites shows good photostability and the photocatalyst retain the 94% of its initial activity in the seventh cycle, respectively.

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“…Recently, it was demonstrated NiO NPs have greater potential applications as photocatalysts compared with other metal oxide NPs [17][18][19][20][21][22][23][24]. Moreover, NiO NP is a p-type semiconductor with a wide band gap of 3.6-4 eV [22], and it exhibits good chemical, magnetic, and optical properties, which may make it suitable for industrial applications such as in antiferromagnetic materials [25], electrode materials for lithium-ion batteries [26], electrochemical supercapacitors [27], gas sensors adsorbents [28], optical amplifier and tunable lasers [29], photovoltaic devices [30], and electrochromic materials [31,32].…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of NiO nanoparticles for photodegradation of free cyanide solutions under ultraviolet light

Bashir

Razanamahandry

Nwanya

et al. 2019

Journal of Physics and Chemistry of Solids

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In this study, we used an environmentally friendly green method to synthesize NiO nanoparticles (NiO NPs) with an extract from Persea americana seeds for use as photocatalysts in the photodegradation of free cyanide (FCN). The characteristics of the NiO NPs were determined by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), ultraviolet-visible (UV-Vis) analysis, and Fourier transform infrared (FTIR) spectroscopy. The XRD results indicated a cubic-type structure with space group Fm m 3 , No. ( 225). Morphological analysis conducted using TEM showed that the NiO NPs had rhombohedral and spherical shapes with slight agglomeration. The particle size calculated based on the TEM results was 11 nm. EDS analysis confirmed the elemental constituents of the samples with Ni and O atoms. The phase purity and chemical bonds in NiO were confirmed using FTIR spectroscopy analysis. UV-Vis analysis indicated that the NiO NPs samples exhibited good optical properties with a well-defined peak at 338.9 nm. The energy band gap E g obtained for NiO NPs based on the optical analyses was 3.75 eV. The NiO NPs performed well as a photocatalyst under UV light during the photodegradation of FCN, where the maximum photocatalytic oxidation efficiency was 84% after irradiation for 30 min. The FCN photodegradation mechanism was elucidated based on the photocatalytic oxidation of compounds by oxygen with semiconductors.

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Kinetics and thermodynamics of cyanide removal by ZnO@NiO nanocrystals

Cited by 51 publications

References 45 publications

UTILITY OF CYANIDE ION REMEDIATION RESIDUES TO PREPARE ACTIVE RODENTICIDE ACCESSING TO ZERO RESIDUE LEVEL: SPRAGUE DAWLEY RATS Rattus rattus AS CASE STUDY

UTILITY OF CYANIDE ION REMEDIATION RESIDUES TO PREPARE ACTIVE RODENTICIDE ACCESSING TO ZERO RESIDUE LEVEL: SPRAGUE DAWLEY RATS Rattus rattus AS CASE STUDY

Ternary hybrid formation and Photocatalytic activity of NiO/CuO/TiO2 microstructure over textile azo dye under solar light irradiation

Biosynthesis of NiO nanoparticles for photodegradation of free cyanide solutions under ultraviolet light

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