Highly efficient degradation of hazardous dyes in aqueous phase by supported palladium nanocatalyst—A green approach

Banazadeh, Alireza; Satha, Hamid; Khaleghi, Mahroo; Shafiei‐Haghighi, Sara

doi:10.1016/j.jece.2015.09.007

Cited by 30 publications

(11 citation statements)

References 49 publications

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“…Many chemical and physical methods (coagulation, precipitation, filtration, membrane separation, electrodialysis, photochemical, oxidative degradation, biodegradation and adsorption) have been used for the removal of dyes from wastewaters [5]. It is now recognized that the advanced oxidation processes (AOPs) are the most effective technology for the degradation of various organic pollutants such as aromatic compounds, dyes, pharmaceutical compounds and pesticides present in industrial wastewater [6][7][8]. Moreover, AOPs are considered as highly competitive water treatment technology for the removal of chemically stable organic pollutants not treatable by conventional techniques due to their high chemical stability and low biodegradability.…”

Section: Introductionmentioning

confidence: 99%

“…Usually AOPs include ozone oxidation, supercritical water oxidation, wet air oxidation, Fenton oxidation reaction (homogeneous and heterogeneous) and catalytic oxidation. Special attention is given to heterogeneous Fenton reactions which are highly efficient and generate no secondary pollution to the environment while saving energy [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Comparative investigation of oxidative degradation of organic dye in the presence of H2O2 and CuO nanoparticles synthesized by sol–gel method and green synthesis using flower (Matricaria chamomilla) extract

Kaušpėdienė¹,

Zubrytė²,

Gefenienė³

et al. 2019

chemija

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In this study, CuO nanoparticles have been synthesized via a simple sol–gel method and green synthesis using flower (Matricaria chamomilla) extract. XRD analysis of the synthesized CuO nanoparticles clearly indicated a crystalline nature with a monoclinic structure regardless of the method of synthesis, while SEM revealed that the used synthesis methods affected the morphology of the CuO nanoparticles. The oxidative degradation kinetics of the organic dye Methyl Orange (MO) in the presence of the synthesized catalyst CuO and H2O2 has been investigated and compared depending on the dye concentration, reaction time and temperature. The catalytic activity of CuO was studied by measuring the UV–visible spectrum of the MO dye solution treated with CuO and H2O2. It was determined that the MO degradation reaction kinetics followed the pseudo-first-order mechanism. Thermodynamic studies indicated an endothermic nature (∆H# = +73.03 kJ mol–1) and a decrease in randomness at the catalyst CuO/solution interface during the reaction (∆S# = –0.021 kJ mol–1 K–1). At the same conditions, the green synthesized CuO nanoparticles exhibit similar activity properties as CuO synthesized using the sol–gel method. Besides, the green synthesis of CuO nanoparticles is simple and uses a small number of chemicals. The obtained CuO may be a promising catalyst for the oxidative degradation of organics, especially used in medical procedures.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative investigation of oxidative degradation of organic dye in the presence of H2O2 and CuO nanoparticles synthesized by sol–gel method and green synthesis using flower (Matricaria chamomilla) extract

Kaušpėdienė¹,

Zubrytė²,

Gefenienė³

et al. 2019

chemija

View full text Add to dashboard Cite

show abstract

“…The degradation of organic pollutants has received special attention in recent years due to the numerous negative effects on the environment and human health. In particular, industrial dyes have been the most common water pollutants 27,28 . These organic dyes have very stable complex structures, which difficult degradation.…”

Section: Introductionmentioning

confidence: 99%

CuO Rapid Synthesis with Different Morphologies by the Microwave Hydrothermal Method

et al. 2018

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CuO structures were synthesized by microwave hydrothermal treatment using two different mineralizing agents (NaOH and NH 4 OH) and were evaluated as photocatalysts. The materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET) surface area analysis. The XRD patterns indicated the formation of the monoclinic phase in both samples with 13.78 and 14.23 nm crystallite size. SEM analysis showed different agglomerates morphologies based on the mineralization agent employed. The CuO nanostructure synthesized with NH 4 OH presented agglomerated like-plates which results in a spherical shape, whereas the material synthesized with NaOH presented an agglomerate of larger plates. Both samples showed photocatalytic activity against RNL azo dye. The quasi-spherical shape CuO material reached 93 % of the discoloration.

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“…Many chemical and physical methods (coagulation, precipitation, filtration, membrane separation, electrodialysis, photochemical, oxidative degradation, biodegradation and adsorption) have been used for the removal of dyes from wastewaters [25]. Nevertheless, the advanced oxidation processes (AOPs) are the most effective technology for the degradation of various organic pollutants such as aromatic compounds, dyes, pharmaceutical compounds, and pesticides present in industrial wastewater [26][27][28][29]. Usually AOPs include ozone oxidation, supercritical water oxidation, wet air oxidation, Fenton oxidation reaction (homogeneous and heterogeneous) and catalytic oxidation.…”

Section: Introductionmentioning

confidence: 99%

Utilization of copper plating effluents in the degradation of the dye Sanodure Green in the presence of H2O2

Sodaitienė¹,

Kaušpėdienė²,

Gefenienė³

et al. 2021

chemija

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Oxidative degradation of metal complex dye Sanodure Green (SG) in the presence of H2O2 and nanostructured catalyst CuO prepared from copper plating effluents has been investigated. The activity of the CuO catalyst in the oxidative degradation reaction depended on the SG concentration, reaction time and temperature. The reaction followed a pseudo-first order kinetic model, and the rate constant was highly dependent on the increase in temperature, but only slightly on the SG concentration. Thermodynamic studies have shown that the degradation reaction of SG is endothermic. The use of copper plating effluents for the preparation of nanostructured catalyst CuO makes it possible to avoid the accumulation of difficult-to-recycle copper oxide sludge formed during effluent neutralization, and to manage copper plating and aluminum dyeing effluents more economically.

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Highly efficient degradation of hazardous dyes in aqueous phase by supported palladium nanocatalyst—A green approach

Cited by 30 publications

References 49 publications

Comparative investigation of oxidative degradation of organic dye in the presence of H2O2 and CuO nanoparticles synthesized by sol–gel method and green synthesis using flower (Matricaria chamomilla) extract

Comparative investigation of oxidative degradation of organic dye in the presence of H2O2 and CuO nanoparticles synthesized by sol–gel method and green synthesis using flower (Matricaria chamomilla) extract

CuO Rapid Synthesis with Different Morphologies by the Microwave Hydrothermal Method

Utilization of copper plating effluents in the degradation of the dye Sanodure Green in the presence of H2O2

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