Great truths are always simple: A millimeter-sized macroscopic lanthanum-calcium dual crosslinked carboxymethyl chitosan aerogel bead as a promising adsorbent for scavenging oxytetracycline from wastewater.

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  • Additional Information
    • Source:
      Publisher: Elsevier Country of Publication: Netherlands NLM ID: 7909578 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-0003 (Electronic) Linking ISSN: 01418130 NLM ISO Abbreviation: Int J Biol Macromol Subsets: MEDLINE
    • Publication Information:
      Publication: Amsterdam : Elsevier
      Original Publication: Guildford, Eng., IPC Science and Technology Press.
    • Subject Terms:
      Chitosan*/chemistry ; Chitosan*/analogs & derivatives ; Oxytetracycline*/chemistry ; Lanthanum*/chemistry ; Wastewater*/chemistry ; Calcium*/chemistry ; Water Purification*/methods ; Water Pollutants, Chemical*/chemistry ; Water Pollutants, Chemical*/isolation & purification; Adsorption ; Kinetics ; Hydrogen-Ion Concentration ; Gels/chemistry
    • Abstract:
      Given their increasing environmental and health harms, it is crucial to develop green and sustainable techniques for scavenging antibiotics represented by oxytetracycline (OTC) from wastewater. In the present work, a structurally simple lanthanum-calcium dual crosslinked carboxymethyl chitosan (CMCS-La 3+ -Ca 2+ ) aerogel was innovatively synthesized for adsorptive removal of OTC. It was found that CMCS and La 3+ sites collaboratively participated in OTC elimination, and OTC removal peaked over the wide pH range of 4-7. The process of OTC sorption was better described by the pseudo-second-order kinetic model and Redlich-Peterson model, and the saturated uptake amount toward OTC was up to 580.91 mg/g at 303 K, which was comparable to the bulk of previous records. The as-fabricated composite also exerted exceptional capture capacity toward OTC in consecutive adsorption-desorption runs and high-salinity wastewater. Amazingly, its packed column continuously ran for over 60 h with a dynamic uptake amount of 215.21 mg/g until the adsorption was saturated, illustrating its great potential in scale-up applications. Mechanism studies demonstrated that multifarious spatially-isolated reactive sites of CMCS-La 3+ -Ca 2+ cooperatively involved in OTC capture via multi-mechanisms, such as n-π EDA interaction, H-bonding, La 3+ -complexation, and cation-π bonding. All the above superiorities endow it as a promising adsorbent for OTC-containing wastewater decontamination.
      Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
      (Copyright © 2024 Elsevier B.V. All rights reserved.)
    • Contributed Indexing:
      Keywords: Carboxymethyl chitosan aerogel; Lanthanum-calcium dual crosslinking process; Oxytetracycline elimination
    • Accession Number:
      9012-76-4 (Chitosan)
      X20I9EN955 (Oxytetracycline)
      6I3K30563S (Lanthanum)
      0 (Wastewater)
      0 (carboxymethyl-chitosan)
      SY7Q814VUP (Calcium)
      0 (Water Pollutants, Chemical)
      0 (Gels)
    • Publication Date:
      Date Created: 20240831 Date Completed: 20240917 Latest Revision: 20240917
    • Publication Date:
      20240917
    • Accession Number:
      10.1016/j.ijbiomac.2024.134499
    • Accession Number:
      39217038