Adsorption and photocatalytic removal of Rhodamine B from wastewater using carbon-based materials

Ajiboye, Timothy O.; Oyewo, Opeyemi A.; Onwudiwe, Damian C.

doi:10.1016/j.flatc.2021.100277

Cited by 69 publications

(16 citation statements)

References 274 publications

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“…This alters the demand ratio above allowable discharge limits. 3 Semiconductor photocatalysis is an interesting approach in the area of wastewater reclamation, offering the possibility to completely degrade organic pollutants without generating secondary pollution. 4 The mechanism mimics photosynthesis and is characterized by the generation of transient in situ highly reactive oxidants and radicals (predominantly OH˙ and O 2 ˙ − ) which results in the mineralization of wastewater pollutants upon UV or visible light irradiation with energy exceeding or equal to the energy gap.…”

Section: Introductionmentioning

confidence: 99%

Visible-light-activated photocatalytic degradation of rhodamine B using WO₃ nanoparticles

2022

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Section: Introductionmentioning

confidence: 99%

Visible-light-activated photocatalytic degradation of rhodamine B using WO₃ nanoparticles

2022

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“…The Freundlich adsorption isotherm is mainly used for expressing the adsorption of non-idealized systems where the adsorbent surface is energetically heterogeneous, indicating the formation of multilayers. During adsorption from the solution, the expression applies:

where

is the equilibrium amount of adsorbed substance per unit mass of adsorbent (

, c is the equilibrium concentration, and K F and n are specific empirical constants [ 14 , 50 , 57 ]. The experimental results of adsorption observation of RB from the aqueous environment on NH 4 BETA, NH 4 ZSM-5, and NaY zeolite are presented in Figure 1 , Figure 2 and Figure 3 and 7 (where x / m is the amount of adsorbed substance in equilibrium, γ e is the adsorbate concentration at equilibrium, and γ o is the initial concentration of adsorbate).…”

Section: Resultsmentioning

confidence: 99%

“…Methylene blue (MB) belongs to the group of xanthene dyes, and rhodamine B (RB) to the group of thiazine dyes [ 14 ]. They are used for dyeing paper and in the textile industry for dyeing cotton, leather, and wool.…”

Section: Introductionmentioning

confidence: 99%

Zeolites as Adsorbents and Photocatalysts for Removal of Dyes from the Aqueous Environment

et al. 2022

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This study investigated the potential of zeolites (NH4BETA, NH4ZSM-5, and NaY) to remove two frequently used dyes, methylene blue (MB) and rhodamine B (RB), from an aqueous environment. The removal of dyes with zeolites was performed via two mechanisms: adsorption and photocatalysis. Removal of dyes through adsorption was achieved by studying the Freundlich adsorption isotherms, while photocatalytic removal of dyes was performed under UV irradiation. In both cases, the removal experiments were conducted for 180 min at two temperatures (283 K and 293 K), and dye concentrations were determined spectrophotometrically. Additionally, after photodegradation, mineralization was analyzed as chemical oxygen demand. A computational analysis of the structures of MB and RB was performed to gain a deeper understanding of the obtained results. The computational analysis encompassed density functional theory (DFT) calculations and analysis of two quantum-molecular descriptors addressing the local reactivity of molecules. Experimental results have indicated that the considered zeolites effectively remove both dyes through both mechanisms, especially NH4BETA and NH4ZSM-5, due to the presence of active acidic centers on the outer and inner surfaces of the zeolite. The lowest efficiency of dye removal was achieved in the presence of NaY zeolite, which has a lower SiO2/Al2O3 ratio. A more efficient reduction was completed for RB dye, which agrees with the computationally obtained information about reactivity.

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“…Polluted samples usually consist of a mixture of organic (such as parabens, organochlorine pesticides and dyes) [10,11] and inorganic pollutants (such as heavy metals and nitrates) [12,13]. In some cases, there may be a need to remove one pollutant in the presence of other pollutants in the environmental samples.…”

Section: Heavy Metals Concentration and Remediationmentioning

confidence: 99%

The Versatility in the Applications of Dithiocarbamates

Ajiboye

Marzouki

Onwudiwe

2022

IJMS

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Dithiocarbamate ligands have the ability to form stable complexes with transition metals, and this chelating ability has been utilized in numerous applications. The complexes have also been used to synthesize other useful compounds. Here, the up-to-date applications of dithiocarbamate ligands and complexes are extensively discussed. Some of these are their use as enzyme inhibitor and treatment of HIV and other diseases. The application as anticancer, antimicrobial, medical imaging and anti-inflammatory agents is examined. Moreover, the application in the industry as vulcanization accelerator, froth flotation collector, antifouling, coatings, lubricant additives and sensors is discussed. The various ways in which they have been employed in synthesis of other compounds are highlighted. Finally, the agricultural uses and remediation of heavy metals via dithiocarbamate compounds are comprehensively discussed.

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Adsorption and photocatalytic removal of Rhodamine B from wastewater using carbon-based materials

Cited by 69 publications

References 274 publications

Visible-light-activated photocatalytic degradation of rhodamine B using WO₃ nanoparticles

Visible-light-activated photocatalytic degradation of rhodamine B using WO₃ nanoparticles

Zeolites as Adsorbents and Photocatalysts for Removal of Dyes from the Aqueous Environment

The Versatility in the Applications of Dithiocarbamates

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Adsorption and photocatalytic removal of Rhodamine B from wastewater using carbon-based materials

Cited by 69 publications

References 274 publications

Visible-light-activated photocatalytic degradation of rhodamine B using WO3 nanoparticles

Visible-light-activated photocatalytic degradation of rhodamine B using WO3 nanoparticles

Zeolites as Adsorbents and Photocatalysts for Removal of Dyes from the Aqueous Environment

The Versatility in the Applications of Dithiocarbamates

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Product

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Visible-light-activated photocatalytic degradation of rhodamine B using WO₃ nanoparticles

Visible-light-activated photocatalytic degradation of rhodamine B using WO₃ nanoparticles