Dynamic sorption of hexavalent chromium using sustainable low-cost eggshell membrane

Lahmar, Amina; Hattab, Zhour; Zerdoum, Radia; Boutemine, Nabila; Djellabi, Ridha; Filali, Naima; Guerfi, Kamel

doi:10.5004/dwt.2020.25126

Cited by 2 publications

(1 citation statement)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, this decrease is directly associated with the electrostatic forces existing between PGP and chromium solution, as consequence a marked reduction in the sorption capacity is observed [6]. Furthermore, as the pH value increases, a competition between OH − and CrO 4 2− as predominant ions occurs in the basic medium [47]. It was concluded that HCrO 4…”

Section: Effect Of Ph Valuementioning

confidence: 99%

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

Boutaleb

Zerdoum

Bensid

et al. 2022

Water

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Effect Of Ph Valuementioning

confidence: 99%