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Jeong, Hoon Eui
Multiscale Biomimetics & Manufacturing Lab
Research Interests
  • Biomimetics
  • Multiscale manufacturing
  • Micro/nanofabrication

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Efficiency of air-dried and freeze-dried alginate/xanthan beads in batch, recirculating and column adsorption processes

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Title
Efficiency of air-dried and freeze-dried alginate/xanthan beads in batch, recirculating and column adsorption processes
Author
Kondaveeti, StalinPetri, Denise F. S.Jeong, Hoon Eui
Issue Date
2022-04
Publisher
ELSEVIER
Citation
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, v.204, pp.345 - 355
Abstract
Alginate (Alg) beads are low-cost adsorbents used for wastewater remediation. In this work, alginate (Alg) and alginate/xanthan (Alg/XG) blend beads were synthesized by gelation method into calcium chloride and freezedried to improve the porosity. Their adsorption efficiency was tested for methylene blue (MB) dye in batch, recirculating and column adsorption systems. The blend beads were characterized using by SEM, FTIR-ATR and X-ray microcomputer tomography (Micro-CT) analyzes. Freeze-dried Alg and Alg/XG beads presented porosity of 46 +/-& nbsp;5% and 77 & nbsp;+/- 3%, respectively. Adsorption isotherms of MB on freeze-dried Alg/XG beads indicated better adsorption capacity in comparison to the air-dried ones. Adsorption kinetics and breakthrough curves based on recirculating and vertical column adsorption processes of MB on freeze dried Alg/XG and air-dried Alg/XG beads indicated higher efficiency for the vertical column system packed with freeze dried Alg/XG beads. The removal efficiency of 91% MB by the freeze-dried Alg/XG beads in vertical column remained even after four consecutive adsorption-desorption cycles, disclosing these beads as potential systems for the wastewater treatment.
URI
https://scholarworks.unist.ac.kr/handle/201301/58373
URL
https://linkinghub.elsevier.com/retrieve/pii/S0141813022002471
DOI
10.1016/j.ijbiomac.2022.02.011
ISSN
0141-8130
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