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

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ID: 188289
2020
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Abstract
Activated carbon (AC) is widely used in water treatment, however, it has some technical disadvantages, such as its high cost and difficulty to recover. To overcome these drawbacks, AC particles have been encapsulated within a polymeric support, mainly chitosan and alginate-based. The use of these biological macromolecules results in composites with lower-cost, superior mechanical properties, and higher number of functional groups, advantages that have been attracted the attention of the scientific community. However, the number of publications is relatively low, demonstrating an important research gap yet to be investigated. Thus, this paper aims to review the recent studies concerning the use of chitosan, alginate and other macromolecules as AC immobilizing agents, describing the synthesis methods, characterization analyses and adsorption studies, focusing on the main advantages, disadvantages, gaps and future perspectives. Throughout the review it was verified that the composites were able to remove several water contaminants, mainly dyes and heavy metals, with high efficiency. Synergistic effects were detected, indicating the role of both polymers and AC, which increased the spectrum of contaminants capable of being adsorbed. Finally, it was observed a gap in column experiments, suggesting that future studies are essential to elucidate the applications in the industrial perspective.
Reference Key
quesada2020chitosaninternational Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Quesada, Heloise Beatriz;de Araújo, Thiago Peixoto;Vareschini, Daniel Tait;de Barros, Maria Angélica Simões Dornellas;Gomes, Raquel Guttierres;Bergamasco, Rosângela;
Journal International journal of biological macromolecules
Year 2020
DOI
S0141-8130(20)34209-4
URL
Keywords
adsorption Activated carbon chitosan alginate bio-based polymers composite beads

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