Microwave-photocatalyzed assisted degradation of brilliant green dye: A batch to continuous approach

Gole, Vitthal L.; Priya, Astha

doi:10.1016/j.jwpe.2017.07.009

Cited by 17 publications

(5 citation statements)

References 17 publications

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“…The non-thermal energy also plays an important role by increase vibrational and rotational levels of molecules, therefore saturation time are shortened to only few seconds. Similar findings were obtained by other [76][77][78]. As any sorption process can be described as a mass transfer process, the microwave radiation represents a sustainable and superfast technique because it characterizes by attaining high operation performance in only few seconds compared with normal sorption case [79][80][81].…”

Section: Sorption Kineticsupporting

confidence: 82%

“…As a result of interaction between microwave radiation and bulk of aqueous medium through photocatalytic reaction assisted with microwave irradiation, the orientation of molecules changes and simultaneously increases the dipolar rotations of the polar groups molecules found in aqueous medium. Finally it leads to generation significant amount of heat occurs [77]. Different forms of heat including thermal, specific excitation and non-thermal effects are produced as outputs of microwave radiation usage.…”

Section: Sorption Kineticmentioning

confidence: 99%

“…Different forms of heat including thermal, specific excitation and non-thermal effects are produced as outputs of microwave radiation usage. The thermal and specific excitations are effective for different pollutants degradation through contribution of hydroxyl radicals which are formed and being very effective in contaminants degradation [77]. The non-thermal energy also plays an important role by increase vibrational and rotational levels of molecules, therefore saturation time are shortened to only few seconds.…”

Section: Sorption Kineticmentioning

confidence: 99%

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Microwave assist sorption of crystal violet and Congo red dyes onto amphoteric sorbent based on upcycled Sepia shells

Elwakeel

Elgarahy

El-Shoubaky

et al. 2020

J Environ Health Sci Engineer

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A new sorbent based on Sepia shells (cuttlefish bones) has been synthesized (SSBC) and tested for the sorption of cationic dye (crystal violet, CV) and an anionic dye (congo red, CR). SSBC was produced by reaction of sepia shells powder with urea in the presence of formaldehyde. In the first part of the work, the sorbent was characterized using scanning electron microscopy, energy dispersive X-ray analysis, Fourier-transform infra-red spectrometry and titration (for determining pH PZC ). In a second step, sorption properties were tested on the two dyes through the study of pH effect, sorbent dosage, temperature and ionic strength; the sorption isotherms and uptake kinetics were analyzed at the optimum pH: Langmuir equation fits isotherm profiles while the kinetic profile can be described by the pseudo-second order rate equation. Maximum sorption capacities reach up to 0.536 mmol g −1 for CV and 0.359 mmol g −1 for CR, at pH 10.6 and 2.4, respectively. The comparison of sorption properties at different temperatures shows that the sorption is endothermic. Processing to the sorption under microwave irradiation (microwaved enforced sorption, MES) increases mass transfer and a contact time as low as 1 min is sufficient under optimized conditions (exposure time and power) reaching the equilibrium, while 2-3 h were necessary for "simple" sorption. Dye desorption was successfully tested using 0.5 M solutions of NaOH and HCl for the removal of CR and CV, respectively. The sorbent can be re-used for a minimum of four cycles of sorption/desorption. Finally, the sorbent was successfully tested on spiked tap water and real industrial wastewater.

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Section: Sorption Kineticsupporting

confidence: 82%

Section: Sorption Kineticmentioning

confidence: 99%

Section: Sorption Kineticmentioning

confidence: 99%

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Microwave assist sorption of crystal violet and Congo red dyes onto amphoteric sorbent based on upcycled Sepia shells

Elwakeel

Elgarahy

El-Shoubaky

et al. 2020

J Environ Health Sci Engineer

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“…Treatments by microwave irradiation offer advantages such as rapid warming in the total volume of the material and a higher energetic efficiency than conventional heat transfer due to the different ways of energy transfer (Leonelli & Mason, 2010). Apart from the thermal effect, some researchers believe that there is a non-thermal effect of microwave radiation, which leads to the possible breaking of hydrogen bonds, and helps to degrade complex organic components into shorter chains (Gole & Priya, 2017;Hong et al, 2004;Tyagi & Lo, 2013;Yu et al, 2010). The unique advantages of microwaveassisted pre-treatment contribute to intensive investigation of it on effectiveness in environmental actions.…”

Section: Simultanism Of Sustainability and Technological Developmentmentioning

confidence: 99%

Marginal note on wastewater recycling margins from the perspective of simultanism of sustainability and technological development

Kovács¹,

Nagy

2022

Columella

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The main feature of our time is the "duality": we demand livable environment, on the other hand we use it in anunsustainable way to ensure the overflowing comfort of welfare societies. As a result, the use of the environment– namely the environmental elements and their systems, processes and structures – has now led to overloading(pollution, damage). So the state of our habitats, reflects our actions, there is no doubt about that. That is, ouractivity is an imprint of our thinking. Changing/modification requires innovations that facilitate the developmentand application of the embedded technologies of the future, building on the intersubjectivity of individuals.One of the cornerstones of the European Green Deal is that "economic growth should be decoupled fromresource use". Among our resources, the water – especially drinking water – is a scarce commodity. However,with prudence, care and ingenuity, we can do a lot to reduce the amount of wastewater.Our short paper demonstrates, through an example of wastewater recyclability, that increasing volumes are nolonger just a problem to solve. Rather, it is a challenge, and technological development offers a way out of itstrap, so that the society does not have to face the negative effects of declining water supply.

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“…(Haque et al 2011;Zirak et al 2017) To date, numerous treatment technologies have been developed to removal of MB, such as physical adsorption, chemical coagulation, chemical oxidation, biodegradation et al (Silva et al 2018;Talaiekhozani et al 2017;Yang et al 2021) Among them, photocatalysis technology is viewed as a promising way to removal of MB from wastewater, because of its advantages of no secondary pollution, high e ciency, low cost and safety. (Gole and Priya 2017;Long et al 2020;Shen et al 2010;Yang et al 2016) So far, many researchers have developed different semiconductor-based photocatalysts for removal of MB from wastewater, because such photocatalysts can directly use sunlight to promote the decomposition of pollutants. (Huang et al 2013;Kumar et al 2021;Ma et al 2021) Among various traditional photocatalysts, ceric oxide (CeO 2 ) has been extensively utilized for dye wastewater remediation, owing to its high chemical stability, strong oxygen storage capacity, high stability against photo-corrosion and low cost.…”

Section: Introductionmentioning

confidence: 99%

CeO2/CdS Heterojunctions Decorated Cotton Fabrics as Facile Recyclable Photocatalysts for Highly Efficient Visible Light Driven Degradation of Methylene Blue

Zou¹,

Li²,

Yang³

et al. 2021

Preprint

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In this work, visible light response CeO2/CdS decorated cotton fabrics as durable and facile recyclable composite photocatalysts were fabricated for photo-degradation of methylene blue (MB). First of all, amino-functionalized CeO2/CdS nanoparticles were synthesized through a fast, efficient and low-cost coprecipitation method. Subsequently, the as-prepared CeO2/CdS nanoparticles were immobilized on aldehyde-functionalized cotton fabric surfaces as composite photocatalysts via "amine-aldehyde" chemical reaction. The surface microstructure and chemical composition of the CeO2/CdS decorated cotton fabric (CeO2/CdS-CF) were characterized by SEM, FTIR and XPS, respectively. The results showed that CeO2/CdS nanoparticles were successfully anchored on the surface of cotton fabric, and distributed uniformly. As expected, the as-prepared CeO2/CdS-CF exhibited excellent photocatalytic activity, which can degrade MB within 90 min with a degradation efficiency of 93.8% under simulated sunlight irradiation, due to the CeO2/CdS heterostructure with the efficient photo-generated charge transfer and separation. In addition, the degradation efficiency remained above 90.3% after five successive degradation cycles, indicating that the obtained CeO2/CdS-CF possessed excellent stability and recyclability. This work opened up a facile preparation way for the fabrication of durable and recyclable composite photocatalysts, and has a promising application in treating dye contaminated wastewater.

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Microwave-photocatalyzed assisted degradation of brilliant green dye: A batch to continuous approach

Cited by 17 publications

References 17 publications

Microwave assist sorption of crystal violet and Congo red dyes onto amphoteric sorbent based on upcycled Sepia shells

Microwave assist sorption of crystal violet and Congo red dyes onto amphoteric sorbent based on upcycled Sepia shells

Marginal note on wastewater recycling margins from the perspective of simultanism of sustainability and technological development

CeO2/CdS Heterojunctions Decorated Cotton Fabrics as Facile Recyclable Photocatalysts for Highly Efficient Visible Light Driven Degradation of Methylene Blue

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