Chitosan, alginate and other macromolecules as activated carbon immobilizing agents: A review on composite adsorbents for the removal of water contaminants

Quesada, Heloise Beatriz; Araújo, Thiago Peixoto de; Vareschini, Daniel Tait; Barros, Maria Angélica Simões Dornellas de; Gomes, Raquel Guttierres; Bergamasco, Rosângela

doi:10.1016/j.ijbiomac.2020.08.118

Cited by 112 publications

(26 citation statements)

References 84 publications

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“…However, due to the small particle size of AC, its application in continuous flow adsorption systems has some disadvantages, such as bed compaction and a high-pressure drop in fixed bed column systems (Aziz, et al, 2020). To avoid such drawbacks, the encapsulation of AC in alginate hydrogels is an attractive alternative with high applicability for continuous flow adsorption processes (Aziz, et al, 2020;Quesada et al, 2020). Alginate gels are highly permeable due to their porous texture and hydrophilicity, providing important advantages due to their high affinity and adsorption potential for several micropollutants, such as heavy metal ions and dyes (Arenales-Sierra et al, 2019;Quesada et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…To avoid such drawbacks, the encapsulation of AC in alginate hydrogels is an attractive alternative with high applicability for continuous flow adsorption processes (Aziz, et al, 2020;Quesada et al, 2020). Alginate gels are highly permeable due to their porous texture and hydrophilicity, providing important advantages due to their high affinity and adsorption potential for several micropollutants, such as heavy metal ions and dyes (Arenales-Sierra et al, 2019;Quesada et al, 2020). The wastewater treatment operation at the real scale requires granular materials of controlled size, which numerous researchers had to generate those materials by the encapsulation of diverse adsorbents in the alginate composite to improve their potentials (Aziz et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Performance and dynamic modeling of a continuously operated pomace olive packed bed for olive mill wastewater treatment and phenol recovery

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance and dynamic modeling of a continuously operated pomace olive packed bed for olive mill wastewater treatment and phenol recovery

et al. 2021

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“…Adsorption is a method that is widely used to remove dyes due more e cient, fast process, and cheap (Eltaweil et al, 2020) . Many adsorbents can be used to absorb dyes such as kaolin (Mustapha et al, 2019) , activated carbon (Quesada et al, 2020;Streit et al, 2019), bentonite (Mohammad et al, 2020) , chitosan (Shi et al, 2020) , and LDH (layered double hydroxide) (Palapa et al, 2019;Zhao et al, 2017;Palapa et al, 2020b;Siregar et al, 2021;Normah et al, 2021;Juleanti et al, 2021). Layered double hydroxide (LDH) has high ion exchange and adsorption ability making LDH an appropriate adsorbent for adsorption of various pollutants.…”

Section: Introductionmentioning

confidence: 99%

Innovative Modified of Cu-Al/C (C = Biochar, Graphite) Composites for Removal of Procion Red from Aqueous Solution

Wijaya

Siregar

Priambodo

et al. 2021

Sci. Technol. Indones

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Innovative modification of Cu-Al/C composites was synthesized by coprecipitation method at pH 10 and added biochar (BC) and graphite (GF) to form Cu-Al/BC and Cu-Al/GF composites. Pristine and composites were characterized by XRD, FT-IR, Thermalgravimetric, and surface area using the BET method. The XRD diffraction and FTIR spectrum of Cu-Al/BC and Cu-Al/GF showed that the composite material from LDH, biochar, and graphite was successfully prepared. Modified LDH were surface area higher than the pristine, which obtained 200.90 m2/g and 18.83 m2/g for Cu-Al/BC and Cu-Al/GF respectively. Cu-Al/BC and Cu-Al/GF were tested for selectivity on several anionic dyes, it was known that procion red (PR) dye was more easily adsorbed than other anionic dyes. Materials were applied as adsorbents of procion red (PR) dye. The advantages of composites were evaluated by the regeneration process of adsorbent on PR. The result of composite toward PR re-adsorption process showed that Cu-Al/BC and Cu-Al/GF had structural stability higher than starting materials until five cycles process. Furthermore, materials were applied as adsorbents of procion red (PR) dye. The maximum adsorption capacity obtained was 93.458 mg/g for Cu-Al/BC and 49.505 mg/g for Cu-Al/GF. Both innovative modified composites have shown effective adsorbents to the removal of PR from an aqueous solution.

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“…Chitosan (Ch) is a biopolymer produced by deacetylation of regularly available biopolymer, chitin. Ch is a well-known source of AC with many applications, such as control drug delivery [ 8 , 9 ], heavy metal removal from water [ 10 , 11 ], hydrogen storage [ 12 ], catalytic and electrochemical plating [ 13 , 14 ], deionization of low-salinity water [ 15 ], pharmaceuticals residue removal [ 16 ], cationic and anionic dye adsorption [ 17 ], removal of pesticides [ 4 ], supercapacitor [ 18 ], and environmental applications [ 9 ]. In addition to the hydroxyl groups (–OH), Ch structure also contains amino groups (–NH 2 ) which is linked to a chain of six-member saccharide rings.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Hexavalent Chromium and Divalent Lead Ions on the Nitrogen-Enriched Chitosan-Based Activated Carbon

2021

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Optimizing the physicochemical properties of the chitosan-based activated carbon (Ch-ACs) can greatly enhance its performance toward heavy metal removal from contaminated water. Herein, Ch was converted into a high surface area (1556 m2/g) and porous (0.69 cm3/g) ACs with large content of nitrogen (~16 wt%) using K2CO3 activator and urea as nitrogen-enrichment agents. The prepared Ch-ACs were tested for the removal of Cr(VI) and Pb(II) at different pH, initial metal ions concentration, time, activated carbon dosage, and temperature. For Cr(VI), the best removal was at pH = 2, while for Pb(II) the best pH for its removal was in the range of 4–6. At 25 °C, the Temkin model gives the best fit for the adsorption of Cr(VI), while the Langmuir model was found to be better for Pb(II) ions. The kinetics of adsorption of both heavy metal ions were found to be well-fitted by a pseudo-second-order model. The findings show that the efficiency and the green properties (availability, recyclability, and cost effectiveness) of the developed adsorbent made it a good candidate for wastewaters treatment. As preliminary work, the prepared sorbent was also tested regarding the removal of heavy metals and other contaminations from real wastewater and the obtained results were found to be promising.

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Chitosan, alginate and other macromolecules as activated carbon immobilizing agents: A review on composite adsorbents for the removal of water contaminants

Cited by 112 publications

References 84 publications

Performance and dynamic modeling of a continuously operated pomace olive packed bed for olive mill wastewater treatment and phenol recovery

Performance and dynamic modeling of a continuously operated pomace olive packed bed for olive mill wastewater treatment and phenol recovery

Innovative Modified of Cu-Al/C (C = Biochar, Graphite) Composites for Removal of Procion Red from Aqueous Solution

Adsorption of Hexavalent Chromium and Divalent Lead Ions on the Nitrogen-Enriched Chitosan-Based Activated Carbon

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