Detoxication of water containing 1,1-dimethylhydrazine by catalytic oxidation with dioxygen and hydrogen peroxide over Cu- and Fe-containing catalysts

Pestunova, O. P.; Elizarova, G. L.; Ismagilov, Z. R.; Керженцев, М. А.; Parmon, Valentin N.

doi:10.1016/s0920-5861(02)00072-x

Cited by 51 publications

(17 citation statements)

References 6 publications

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“…The present experiment has an interesting observation that UDMH oxidation rate does not increase further when pH is lowered bellow 2.0 and the initial pH values from 2.0 to 7.4 appear to be more favorable for UDMH degradation, since the oxidation rate is relatively high as well as the mineralization degree. These results are in good agreement with [10,11].…”

Section: The Influence Of Initial Phsupporting

confidence: 89%

“…Although high degradation efficiencies for a variety of contaminants have been reported when using Fenton reaction, usually these studies have been carried out at acidic pH [9][10][11][23][24][25][26]. Safarzadeh-Amiri et al [27] have presented a detailed explanation linking these effects with iron speciation, which is strongly dependent on pH.…”

Section: The Influence Of Initial Phmentioning

confidence: 99%

“…Oxidation with ozone, catalytic oxidation with oxygen and hydrogen peroxide in the presence of Cu, Fe, Co salts supported on zeolites as catalysts, and oxidation with chloramine may be used for the removal of UDMH from water [6,7]. The main disadvantage of these methods is formation of NDMA as an intermediate of UDMH oxidation [8].…”

Section: Introductionmentioning

confidence: 99%

“…The main disadvantage of these methods is formation of NDMA as an intermediate of UDMH oxidation [8]. Advanced oxidation processes (AOPs), such as photocatalysis, Fenton, photo-Fenton, and UV/H 2 O 2 have been investigated and reported by some researchers as efficient methods for degradation of UDMH, and minimizing the formation of NDMA [9][10][11]. However, the continuous need for an oxidizing agent (hydrogen peroxide, ozone, etc.)…”

Section: Introductionmentioning

confidence: 99%

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Decontamination of unsymmetrical dimethylhydrazine waste water by hydrodynamic cavitation-induced advanced Fenton process

Angaji

Ghiaee

2015

Ultrasonics Sonochemistry

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A pilot scale hydrodynamic cavitation (HC) reactor, using iron metal blades, as the heterogeneous catalyst, with no external source of H₂O₂ was developed for catalytic decontamination of unsymmetrical dimethylhydrazine (UDMH) waste water. In situ generation of Fenton reagents suggested an induced advanced Fenton process (IAFP) to explain the enhancing effect of the used catalyst in the HC process. The effects of the applied catalyst, pH of the initial solution (1.0-9.7), initial UDMH concentration (2-15 mg/l), inlet pressure (5.5-7.8bar), and downstream pressure (2-6 bar), have been investigated. The results showed that the highest cavitation yield can be obtained at pH 3 and initial UDMH concentration of 10mg/l. Also, an increase in the inlet pressure would lead to an increase in the extent of UDMH degradation. In addition, the optimum value of 3 bar was determined for the downstream pressure that resulted to 98.6% degradation of UDMH after 120 min of processing time. Neither n-nitrosodimethylamine (NDMA) nor any other toxic byproduct (/end-product) was observed in the investigated samples. Formic acid and acetic acid, as well as nitromethane, were identified as oxidation by-products. The present work has conclusively established that hydrodynamic cavitation in combination with Fenton's chemistry can be effectively used for the degradation of UDMH.

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Section: The Influence Of Initial Phsupporting

confidence: 89%

Section: The Influence Of Initial Phmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Decontamination of unsymmetrical dimethylhydrazine waste water by hydrodynamic cavitation-induced advanced Fenton process

Angaji

Ghiaee

2015

Ultrasonics Sonochemistry

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“…and sulfate radicals) [6,7]. For mineralization of hazardous organic materials such as pesticides, azo dyes, trinitrotoluene, and dimethylhydrazine, AOPs are preferred rather than physical and biological methods [8][9][10][11]. The mineralization process means complete oxidative degradation of an organic matter to the carbon dioxide and water.…”

Section: Introductionmentioning

confidence: 99%

Mineralization of unsymmetrical dimethylhydrazine (UDMH) via persulfate activated by zero valent iron nano particles: modeling, optimization and cost estimation

Zarei

Rezaei-Vahidian

Soleymani

2016

Desalination and Water Treatment

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2015): Mineralization of unsymmetrical dimethylhydrazine (UDMH) via persulfate activated by zero valent iron nano particles: modeling, optimization and cost estimation, Desalination and Water Treatment, A B S T R A C TThis work examined the mineralization of unsymmetrical dimethylhydrazine (UDMH) as an alarming organic contaminant, via persulfate (PS) oxidation process. Nano zero-valent iron (NZVI) particles, as a source of ferrous ions, were synthesized and used to activate PS ions in the media. The effective operational parameters such as NZVI dosage, pH, and initial amount of PS were optimized by response surface methodology as a statistical experimental design. The mineralization efficiency and the demand-operating cost (DOC) of the process were well modeled by two second-order polynomial equations. Based on the desirability, function optimization of the responses was performed. In the optimum condition of pH 3.45, [PS] 0 = 836.16 mg L −1 , and [NZVI] 0 = 158.45 mg L −1 , the model predicted 91% of the UDMH mineralization and 10 US$/m 3 for the DOC that the electrical energy constitutes 69% of the total cost. Compared with the related literatures about treatment of the UDMH, the applied NZVI/PS process reached a high efficiency using lower chemicals.

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Synthesis of Novel MOF‐Based Bi_xTi_y‐BTC and Bi₁Ti₃‐BTC/Fe₃O₄ Photocatalysts and Their Application in the Degradation of UDMH in Wastewater

Zhou,

Xie,

Huo

et al. 2024

ChemistrySelect

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Removal of organic pollutants from wastewater remains a significant challenge. Hence, we report a series of novel MOFs based BixTiy‐BTC photocatalysts synthesized by hydrothermal method for decontamination of 1,1‐Dimethylhydrazine (UDMH). The preparation parameters of MOFs were optimized, the best catalytic performance was achieved by adjusting the Bi/Ti molar ratio to 1 : 3, with Bi1Ti3‐BTC a photocurrent density of 0.35 mA/cm2 was reached. The morphology and composition of the materials were analyzed, titanium doping increased the specific surface area. Bi1Ti3‐BTC was loaded with magnetic nano‐Fe3O4, which prevented agglomeration of Bi1Ti3‐BTC and increased the specific surface area, thus improving photocatalytic activity. The band gap structure of the semiconductor materials was estimated by UV‐Vis and XPS valence band spectra, while the separation efficiency of photogenerated carriers was investigated by photocurrent density and PL (Photoluminescence) spectrum. The photocatalytic degradation rate of UDMH rapidly decreased after addition of EDTA, indicating that h+ was the main active species in the photocatalytic degradation process. The photocatalytic removal efficiency of UDMH with Bi1Ti3‐BTC/Fe3O4 at a concentration of 0.5 g/L reached 97.58 % after illumination for 180 min, and after 210 min near quantitative degradation was observed.

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Detoxication of water containing 1,1-dimethylhydrazine by catalytic oxidation with dioxygen and hydrogen peroxide over Cu- and Fe-containing catalysts

Cited by 51 publications

References 6 publications

Decontamination of unsymmetrical dimethylhydrazine waste water by hydrodynamic cavitation-induced advanced Fenton process

Decontamination of unsymmetrical dimethylhydrazine waste water by hydrodynamic cavitation-induced advanced Fenton process

Mineralization of unsymmetrical dimethylhydrazine (UDMH) via persulfate activated by zero valent iron nano particles: modeling, optimization and cost estimation

Synthesis of Novel MOF‐Based Bi_xTi_y‐BTC and Bi₁Ti₃‐BTC/Fe₃O₄ Photocatalysts and Their Application in the Degradation of UDMH in Wastewater

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Detoxication of water containing 1,1-dimethylhydrazine by catalytic oxidation with dioxygen and hydrogen peroxide over Cu- and Fe-containing catalysts

Cited by 51 publications

References 6 publications

Decontamination of unsymmetrical dimethylhydrazine waste water by hydrodynamic cavitation-induced advanced Fenton process

Decontamination of unsymmetrical dimethylhydrazine waste water by hydrodynamic cavitation-induced advanced Fenton process

Mineralization of unsymmetrical dimethylhydrazine (UDMH) via persulfate activated by zero valent iron nano particles: modeling, optimization and cost estimation

Synthesis of Novel MOF‐Based BixTiy‐BTC and Bi1Ti3‐BTC/Fe3O4 Photocatalysts and Their Application in the Degradation of UDMH in Wastewater

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Synthesis of Novel MOF‐Based Bi_xTi_y‐BTC and Bi₁Ti₃‐BTC/Fe₃O₄ Photocatalysts and Their Application in the Degradation of UDMH in Wastewater