Batch Adsorption Study and Kinetic Profile of Cr(VI) Using Lumbang (Aleurites moluccana)-Derived Activated Carbon-Chitosan Composite Crosslinked With Epichlorohydrin

Villarante, Nelson R.; Bautista, Angelo Patrick R.; Sumalapao, Derick Erl P.

doi:10.13005/ojc/330307

Cited by 14 publications

(12 citation statements)

References 28 publications

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“…Alternatively, the chitosan can be dissolved in acid and then the AC can be added in the form of a powder to generate CS/AC [ 286 , 287 ]. Crosslinking agents, such as glutaraldehyde [ 288 ], genipin [ 289 ] or epichlorohydrin [ 290 ], can be added to generate the composite hydrogels. With this latter approach, the ratio of activated carbon to chitosan can be easily varied [ 291 ], while other additives can be introduced.…”

Section: Chitosan Supportsmentioning

confidence: 99%

Recent Developments in Chitosan-Based Adsorbents for the Removal of Pollutants from Aqueous Environments

et al. 2021

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The quality of water is continuously under threat as increasing concentrations of pollutants escape into the aquatic environment. However, these issues can be alleviated by adsorbing pollutants onto adsorbents. Chitosan and its composites are attracting considerable interest as environmentally acceptable adsorbents and have the potential to remove many of these contaminants. In this review the development of chitosan-based adsorbents is described and discussed. Following a short introduction to the extraction of chitin from seafood wastes, followed by its conversion to chitosan, the properties of chitosan are described. Then, the emerging chitosan/carbon-based materials, including magnetic chitosan and chitosan combined with graphene oxide, carbon nanotubes, biochar, and activated carbon and also chitosan-silica composites are introduced. The applications of these materials in the removal of various heavy metal ions, including Cr(VI), Pb(II), Cd(II), Cu(II), and different cationic and anionic dyes, phenol and other organic molecules, such as antibiotics, are reviewed, compared and discussed. Adsorption isotherms and adsorption kinetics are then highlighted and followed by details on the mechanisms of adsorption and the role of the chitosan and the carbon or silica supports. Based on the reviewed papers, it is clear, that while some challenges remain, chitosan-based materials are emerging as promising adsorbents.

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Section: Chitosan Supportsmentioning

confidence: 99%

Recent Developments in Chitosan-Based Adsorbents for the Removal of Pollutants from Aqueous Environments

et al. 2021

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“…Adsorption kinetic studies were performed using the first order, second order, pseudo-second order, and the Elovich models 20,21 .…”

Section: Adsorption Kineticsmentioning

confidence: 99%

“…5d). Lower doses adsorbed less Pb (II) since lower amount of the adsorbent has less adsorption sites 20,21 . However, beyond 4 g/L there is a continuous decrease in the percent removal which means that the adsorptive capacity of the adsorbent was not highly utilized due to its aggregation.…”

Section: Effect Of Adsorbent Dosementioning

confidence: 99%

“…5e). It can also be observed that as the concentration of the metal increases, the percent removal decreases which reflects the limited number of adsorption sites in the composite and that at high concentrations, the adsorption sites become saturated 20,21,28 . …”

Section: Effect Of Metal Concentrationmentioning

confidence: 99%

“…Furthermore, this supports the assumption that the adsorption process follows the D. R isotherm which describes the adsorption process to be physisorption. The pseudo-second order model is applicable in the kinetic studies of heavy metals and dyes sorption 20,21,33,34 .…”

Section: Adsorption Kineticsmentioning

confidence: 99%

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Removal of Lead (Ii) By Lumbang (Aleurites Moluccana) Activated Carbon Carboxymethylcellulose Composite Crosslinked with Epichlorohydrin

Villarante¹,

Davila²,

Sumalapao³

2018

Orient. J. Chem

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Removal of Pb(II) using lumbang activated carbon carboxymethylcellulose composite crosslinked with epichlorohydrin was investigated. Batch adsorption studies were performed to evaluate the effects of pH, contact time, temperature, adsorbent dose, and metal concentration. To characterize the adsorbent, proximate analysis, bulk density, DSC, FT-IR, and SEM analysis were performed. Results of FT-IR revealed that crosslinking did not alter the structure of carboxymethylcellulose due to the presence of the -COO functional groups, while the presence of the C-O signal indicates that the adsorbent was successfully crosslinked by epichlorohydrin. Furthermore, SEM results showed highly porous nature of the prepared adsorbent. The optimized parameters of the adsorbent were pH 3, contact time of 15 min. 30 o C temperature, adsorbent dose of 4 g/L at 5 ppm Pb (II) solution. With these optimized parameters, 73% removal of Pb (II) was attained in aqueous solutions, while 37% removal was observed in the wastewater sample. Moreover, the adsorption process was best described by Dubinin-Radushkevich isotherm and obeyed the pseudo-second order kinetic model.

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Deep eutectic solvent-treated palm oil mill sludge adsorbents for methylene blue adsorption

Francis,

Zaini

2023

Environ Monit Assess

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Batch Adsorption Study and Kinetic Profile of Cr(VI) Using Lumbang (Aleurites moluccana)-Derived Activated Carbon-Chitosan Composite Crosslinked With Epichlorohydrin

Cited by 14 publications

References 28 publications

Recent Developments in Chitosan-Based Adsorbents for the Removal of Pollutants from Aqueous Environments

Recent Developments in Chitosan-Based Adsorbents for the Removal of Pollutants from Aqueous Environments

Removal of Lead (Ii) By Lumbang (Aleurites Moluccana) Activated Carbon Carboxymethylcellulose Composite Crosslinked with Epichlorohydrin

Deep eutectic solvent-treated palm oil mill sludge adsorbents for methylene blue adsorption

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