Mechanism and kinetics of Cr(VI) adsorption on biochar derived from Citrobacter freundii under different pyrolysis temperatures

Singh, Simranjeet; Anil, Amith G.; Naik, T.S. Sunil Kumar; Basavaraju, U; Khasnabis, Sutripto; Nath, Bidisha; Kumar, Vineet; Subramanian, S.; Singh, Joginder

doi:10.1016/j.jwpe.2022.102723

Cited by 31 publications

(2 citation statements)

References 44 publications

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“…The negative values of ∆G • and high negative values of ∆S • with the rise of temperature manifest the favorable nature of the process. Whereas the observed decrease in ∆G • values with temperature signifies that the adsorption process occurs favorably at lower temperatures [53]. Similar results were also observed in the literature for Cr(VI) adsorption onto different adsorbents [6,54].…”

Section: Temperaturesupporting

confidence: 89%

Adsorption of Cr(VI) by Mesoporous Pomegranate Peel Biowaste from Synthetic Wastewater under Dynamic Mode

Boutaleb

Zerdoum

Bensid

et al. 2022

Water

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This study aims to eliminate hexavalent chromium Cr(VI) ions from water using pomegranate peel (PGP) powder. Dynamic measurements are carried out to examine the influence of the operating factors on the adsorption efficiency and kinetics. The analyzed PGP is found to be amorphous with relatively high stability, contains hydroxyl and carboxyl functional groups, a pH of zero charge of 3.9, and a specific surface-area of 40.38 m2/g. Adsorption tests indicate that PGP exhibits excellent removal effectiveness for Cr(VI) reaching 50.32 mg/g while the adsorption process obeys the Freundlich model. The thermodynamic study favors the exothermic physical adsorption process. The influence of operating parameters like the flow rate (1 to 3 mL/min), bed height (25 to 75 mm), concentration (10 to 30 mg/L), and temperature (298 to 318 K) on the adsorption process are investigated in column mode. To assess the performance characteristics of the column adsorption data, a non-linear regression has been used to fit and analyze four different kinetic and theoretical models, namely, Bohart-Adams, Thomas model, Clark, and Dose response. The obtained experimental results were found to obey the Dose Response model with a coefficient of regression R2 greater than 0.977. This study proved the excellent efficiency in the treatment of chemical industry effluents by using cost-effect abundant biowaste sorbent. This research demonstrated great efficacy in the treatment of chemical industrial effluents by using an abundant, cost-effective biowaste sorbent, thereby achieving the UN SDGs (UN Sustainable Development Goals) primary objective.

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Section: Temperaturesupporting

confidence: 89%

Adsorption of Cr(VI) by Mesoporous Pomegranate Peel Biowaste from Synthetic Wastewater under Dynamic Mode

Boutaleb

Zerdoum

Bensid

et al. 2022

Water

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“…The calculated H° values were positive, suggesting that the adsorption was endothermic. Finally, positive S° values implies that the adsorption process is stable and random [74][75][76][77][78] .…”

Section: Storage Stability and Operational Cyclesmentioning

confidence: 99%

The synergistic effect of degradation and adsorption for emerging pollutants removal from water and real wastewater by using immobilized activated carbon from pomegranate peels

Al-sareji

Meiczinger

Al-Juboori

et al. 2023

Preprint

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In this study, pomegranate peels (PPs) as an abundant fruit processing waste was used to produce cost-effective, eco-friendly, and high-quality activated carbon. The produced carbon (fossil free activated carbon) was used for immobilizing laccase to remove a range of emerging pollutants namely diclofenac, amoxicillin, carbamazepine, and ciprofloxacin from water and wastewater. The loaded activated carbon by laccase (LMPPs) and the unloaded one (MPPs) were characterized using advanced surface chemistry analysis techniques. MPPs was found to have a porous structure with a large surface area and an abundance of acidic functional groups. Laccase immobilization reduced surface area but added active degradation sites. The optimal immobilization parameters were determined as pH 4, 35 oC, and a laccase concentration of 2.5 mg/mL resulting in a 69.8% immobilization yield. The adsorption of the emerging pollutant onto MPPs is best characterized as a spontaneous endothermic process that adheres to the Langmuir isotherm and first-order kinetics. Using synergistic adsorption and enzymatic degradation, the target pollutants (50 mg/L) were eliminated in two hours. In both water types, LMPPs outperformed MPPs. This study shows that pomegranate peels can effectively be harnessed as an enzyme carrier and adsorbent for the removal of emerging pollutants even from a complex sample matrix. The removal of contaminants from wastewater lasted five cycles, whereas it continued up to six cycles for water.

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Biosensors as a Principal Tool for Bioremediation Monitoring

Singh¹,

Thakur²,

Dhanjal³

et al. 2023

Genomics Approach to Bioremediation

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Mechanism and kinetics of Cr(VI) adsorption on biochar derived from Citrobacter freundii under different pyrolysis temperatures

Cited by 31 publications

References 44 publications

Adsorption of Cr(VI) by Mesoporous Pomegranate Peel Biowaste from Synthetic Wastewater under Dynamic Mode

Adsorption of Cr(VI) by Mesoporous Pomegranate Peel Biowaste from Synthetic Wastewater under Dynamic Mode

The synergistic effect of degradation and adsorption for emerging pollutants removal from water and real wastewater by using immobilized activated carbon from pomegranate peels

Biosensors as a Principal Tool for Bioremediation Monitoring

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