Hydrothermal modification and characterization of bentonite for reactive adsorption of methylene blue: An ESI-MS study

Gupta, Vishu; Sharma, Manisha; Vyas, Raj K.

doi:10.1016/j.jece.2015.07.022

Cited by 27 publications

(8 citation statements)

References 23 publications

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“…MB degradation in the presence of H 2 O 2 using a composite of Fe-rich soil and sucrose-based charcoal and δ-FeOOH nanoparticles is well documented in the literature. Studies on the reactive adsorption of MB using clays , have been reported earlier. The paucity of literature on kinetic and thermodynamic aspects of dye degradation using reactive adsorption motivates further research.…”

Section: Introductionmentioning

confidence: 98%

“…Highly colored wastewaters from textile industries enter natural water sources deteriorating their quality and subsequently intensifying toxicity. , Therefore, degradation and subsequent removal of these moieties have a great role in minimizing pollution of the environment. Reactive adsorption comprises concurrent reaction and separation of the solute during adsorption in a single unit operation . Reactive adsorption has great potential to replace adsorption as it increases the rate of degradation by a significant proportion and requires less frequent sorbent regeneration .…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic and Kinetic Studies of Methylene Blue Degradation Using Reactive Adsorption and Its Comparison with Adsorption

2017

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Granular activated carbon doped with iron (Fe-GAC) was prepared and methylene blue (MB) removal efficiency was tested using reactive adsorption (Fe-GAC/H2O2) and adsorption (Fe-GAC). The color removal efficiencies of Fe-GAC/H2O2 and Fe-GAC were found to be 94% and 25%, respectively, in 3 h at 30 °C. The higher MB removal was achieved because of hydroxyl radical-induced oxidative degradation in the presence of Fe-GAC/H2O2 at natural pH. MB removal rate using reactive adsorption (0.015 min–1) was much faster than adsorption (0.004 min–1). Thermodynamic parameters revealed that enthalpy change was approximately one-third for reactive adsorption as that for adsorption, indicating reactive adsorption to be superior. Electrospray ionization-mass spectrometry (ESI-MS) analysis showed that reactive degradation of MB molecule followed demethylation and hydroxylation processes. The process of reactive adsorption was further investigated by identifying compounds using desorption from spent Fe-GAC through ESI-MS. Recovery and identification of such degraded compounds may be commercially attractive. An oxidative degradation pathway and a reactive adsorption scheme have been proposed.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Thermodynamic and Kinetic Studies of Methylene Blue Degradation Using Reactive Adsorption and Its Comparison with Adsorption

2017

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“…Referring to the properties owned by natural clay mineral, besides the price is relatively low-cost, clay minerals are highly effective as an adsorbent [7,8].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Montmorillonite-Cetyl Trimethylammonium Bromide

Siregar¹,

Wijaya²,

Kunarti³

et al. 2017

Asian J. Chem.

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“…Similarly, methylene blue (MB) was analyzed by electrospray ionization mass spectrometry (ESI-MS) during the reactive adsorption to bentonite clay. Different methylene blue products were indicated in degradation process and ESI-MS analysis was verified MB molecule oxidation (Gupta et al, 2015).…”

Section: Analysis Of Esi-tof-ms Of Metabolites In Biodecolourization mentioning

confidence: 84%

Biodecolourization and biotransformation of textile dyes remazol violet-5R and remazol brillant orange-3R by Bacillus sp. DT9 isolated from textile effluents

Doğanlı¹,

Bozbeyoğlu²,

Akdogan³

et al. 2017

Global NEST Journal

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The present study aims to evaluate RV-5R and RBO-3R decolourizing potential of Bacillus sp. DT9 isolated from textile effluent in Denizli (Turkey). In present study, maximum dye-decolourizing efficiency of the culture was achieved at 25 mg l-1 concentration of RV-5R and 500 mg l-1 concentration of RBO-3R. While the optimum dye-decolorizing activity of DT9 was observed at pH 7.5 and 37oC in sucrose for RV-5R (91.66% decolourization rate), 500 mg l-1 RBO-3R concentration by Bacillus sp. DT9 was decolourized at pH 9.0 and 30°C in sucrose/peptone containing medium (98.41% decolourization rate). In other step of study, DT9 was immobilized in Ca-alginate. According to immobilization results, the percentage of decolourization of RV-5R was found very similar to cell free result. But, the percentage of decolourization of RBO-3R decreased 30.0%, when DT-9 cells were immobilized in Ca-alginate. Metabolites of the RV-5R and RBO-3R biodegradation were analysed via ESI-TOF/MS analysis at the end of decolourization process, and the biotransformation and dimerization was confirmed.

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Hydrothermal modification and characterization of bentonite for reactive adsorption of methylene blue: An ESI-MS study

Cited by 27 publications

References 23 publications

Thermodynamic and Kinetic Studies of Methylene Blue Degradation Using Reactive Adsorption and Its Comparison with Adsorption

Thermodynamic and Kinetic Studies of Methylene Blue Degradation Using Reactive Adsorption and Its Comparison with Adsorption

Preparation and Characterization of Montmorillonite-Cetyl Trimethylammonium Bromide

Biodecolourization and biotransformation of textile dyes remazol violet-5R and remazol brillant orange-3R by Bacillus sp. DT9 isolated from textile effluents

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