Preparation and characterization of modified anion exchange resin for uranium adsorption: estimation of nonlinear optimum isotherm, kinetic model parameters, error function analysis and thermodynamic studies

Salem, Amany R.; El-Maghrabi, Heba H.

doi:10.1080/01932691.2021.1956322

Cited by 2 publications

(2 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, some active sites on the adsorbent may be readily occupied by adsorbate molecules, while other sites require more energy to accommodate adsorption. However, unlike the infinite surface coverage adsorption predicted by the Freundlich model, the Liu model still allows for the saturation of active sites (Salem & El-Maghrabi 2023). The theoretical maximum CIP adsorption capacity determined by the Liu model was 37.0 mg/g, showing the potential of CH as an adsorbent material.…”

Section: Adsorption Kinetics and Equilibrium Experimentsmentioning

confidence: 94%

Valorization of coffee husks for the sustainable removal of pharmaceuticals from aqueous solutions

Ospina-Montoya,

Cardozo,

Porras

et al. 2024

H2Open Journal

View full text Add to dashboard Cite

The contamination of wastewater with pharmaceutical compounds represents a growing environmental challenge due to the inefficiency of conventional treatment systems in removing these emerging contaminants. The coffee husk (CH) is a promising bioadsorbent due to its abundant availability as a byproduct of coffee production. This study focuses on using untreated CH as an adsorbent for removing acetaminophen (ACE) and ciprofloxacin (CIP) while exploring the impact of pyrolysis temperature on the adsorption efficiency of these pharmaceutical compounds. The results reveal an excellent CH performance in removing CIP, achieving 64% removal with a maximum adsorption capacity of 37.00 mg/g. Increasing the pyrolysis temperature during the heat treatment of coffee husks significantly affects the adsorption of CIP. This behavior is primarily due to the reduction in functional groups, which are essential for facilitating the adsorption of CIP onto the resulting biochar. Thermodynamic parameters (ΔH° > 0 and ΔG° > 0) indicate that CIP adsorption on CH is an endothermic and not spontaneous process. The removal efficiency of CIP on CH for synthetic wastewater and urine matrices showed that CH can effectively remove CIP from wastewater. Finally, the reuse of CH as a bioadsorbent highlights its potential to contribute to water quality improvement and environmental preservation.

show abstract

Section: Adsorption Kinetics and Equilibrium Experimentsmentioning

confidence: 94%

Valorization of coffee husks for the sustainable removal of pharmaceuticals from aqueous solutions

Ospina-Montoya,

Cardozo,

Porras

et al. 2024

H2Open Journal

View full text Add to dashboard Cite

show abstract

“…Pseudo-first-order as well as pseudo-second-order model was maintained for the good data to estimate U(VI) sorption kinetics on SiO 2 /GO sorbent. The nonlinear equation of the two forms is as follows [66]:…”

Section: Sorption Time and Kineticsmentioning

confidence: 99%

Sustainable Remedy Waste to Generate SiO2 Functionalized on Graphene Oxide for Removal of U(VI) Ions

et al. 2022

View full text Add to dashboard Cite

The Hummer process is applied to generate graphene oxide from carbon stocks’ discharged Zn-C batteries waste. SiO2 is produced from rice husks through the wet process. Subsequently, SiO2 reacted with graphene oxide to form silica/graphene oxide (SiO2/GO) as a sorbent material. XRD, BET, SEM, EDX, and FTIR were employed to characterize SiO2/GO. Factors affecting U(VI) sorption on SiO2/GO, including pH, sorption time, a dosage of SiO2/GO, U(VI) ions’ concentration, and temperature, were considered. The experimental data consequences indicated that the uptake capacity of SiO2/GO towards U(VI) is 145.0 mg/g at a pH value of 4.0. The kinetic calculations match the pseudo second-order model quite well. Moreover, the sorption isotherm is consistent with the Langmuir model. The sorption procedures occur spontaneously and randomly, as well as exothermically. Moreover, SiO2/GO has essentially regenerated with a 0.8 M H2SO4 and 1:50 S:L phase ratio after 60 min of agitation time. Lastly, the sorption and elution were employed in seven cycles to check the persistent usage of SiO2/GO.

show abstract

Preparation and characterization of modified anion exchange resin for uranium adsorption: estimation of nonlinear optimum isotherm, kinetic model parameters, error function analysis and thermodynamic studies

Cited by 2 publications

References 60 publications

Valorization of coffee husks for the sustainable removal of pharmaceuticals from aqueous solutions

Valorization of coffee husks for the sustainable removal of pharmaceuticals from aqueous solutions

Sustainable Remedy Waste to Generate SiO2 Functionalized on Graphene Oxide for Removal of U(VI) Ions

Contact Info

Product

Resources

About