Enhanced Manganese Uptake by BTCA-Functionalized Lignocellulosic Felts

Abstract

Lignocellulosic felts derived from hemp and flax were investigated as sustainable biosorbents for manganese ions removal from aqueous solutions, both in their native form and after functionalization through 1,2,3,4-butanetetracarboxylic acid (BTCA) grafting. Batch experiments were conducted to assess the influence of initial metal concentration, adsorbent dosage, pH, and ionic strength on biosorption performance. BTCA modification significantly enhanced Mn2+ uptake, with flax-based felts outperforming hemp due to their higher α-cellulose content, finer fiber morphology, and larger effective surface area. Mn2+ removal increased with adsorbent dosage and reached its maximum at pH values promoting deprotonation of BTCA carboxyl groups, confirming a complexation-driven mechanism. Increasing the solution ionic strength (0.1-0.5 M NaCl) reduced removal efficiency by competitive Na+ interactions with cellulose, hemicellulose, and BTCA-derived -COO− groups, though modified felts maintained superior performance. Adsorption isotherm modelling revealed distinct behaviors among materials: native felts fit moderately well to the Langmuir model, while BTCA-modified flax showed excellent agreement with Langmuir and Dubinin–Radushkevich models. The mean free energy of 18 kJ mol−1 confirmed chemisorption via metal-carboxylate coordination as the dominant mechanism. Overall, BTCA-modified flax felts emerged as highly effective and environmentally friendly biosorbents, offering strong potential for Mn2+ removal in industrial wastewater treatment applications.

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Cite

BibTeX RIS

BibTeX

@article{lacalamita2026enhanced,
  title = {{Enhanced Manganese Uptake by BTCA-Functionalized Lignocellulosic Felts}},
  author = {Dario Lacalamita and Chiara Mongiovi and Nadia Morin-Crini and Bernard Martel and Jean-Noël Staelens and Gilles Chanet and Marina Raschetti and Vincent Placet and Xavier Gabrion and Cesare Cosentino and Grégorio Crini},
  journal = {ChemistrySelect},
  year = {2026},
  month = sep,
  doi = {10.1002/slct.73337},
  url = {https://hal.science/hal-05756495v1},
  note = {CC BY 4.0},
}

RIS

TY  - JOUR
TI  - Enhanced Manganese Uptake by BTCA-Functionalized Lignocellulosic Felts
AU  - Dario Lacalamita
AU  - Chiara Mongiovi
AU  - Nadia Morin-Crini
AU  - Bernard Martel
AU  - Jean-Noël Staelens
AU  - Gilles Chanet
AU  - Marina Raschetti
AU  - Vincent Placet
AU  - Xavier Gabrion
AU  - Cesare Cosentino
AU  - Grégorio Crini
PY  - 2026
DA  - 2026/09/21
JO  - ChemistrySelect
DO  - 10.1002/slct.73337
UR  - https://hal.science/hal-05756495v1
AB  - Lignocellulosic felts derived from hemp and flax were investigated as sustainable biosorbents for manganese ions removal from aqueous solutions, both in their native form and after functionalization through 1,2,3,4-butanetetracarboxylic acid (BTCA) grafting. Batch experiments were conducted to assess the influence of initial metal concentration, adsorbent dosage, pH, and ionic strength on biosorption performance. BTCA modification significantly enhanced Mn2+ uptake, with flax-based felts outperforming hemp due to their higher α-cellulose content, finer fiber morphology, and larger effective surface area. Mn2+ removal increased with adsorbent dosage and reached its maximum at pH values promoting deprotonation of BTCA carboxyl groups, confirming a complexation-driven mechanism. Increasing the solution ionic strength (0.1-0.5 M NaCl) reduced removal efficiency by competitive Na+ interactions with cellulose, hemicellulose, and BTCA-derived -COO− groups, though modified felts maintained superior performance. Adsorption isotherm modelling revealed distinct behaviors among materials: native felts fit moderately well to the Langmuir model, while BTCA-modified flax showed excellent agreement with Langmuir and Dubinin–Radushkevich models. The mean free energy of 18 kJ mol−1 confirmed chemisorption via metal-carboxylate coordination as the dominant mechanism. Overall, BTCA-modified flax felts emerged as highly effective and environmentally friendly biosorbents, offering strong potential for Mn2+ removal in industrial wastewater treatment applications.
SN  - 2365-6549
SN  - 2365-6549
ER  -

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