Amino-functionalized magnetic zirconium alginate beads for phosphate removal and recovery from aqueous solutions

Huayong Luo, Hongwei Rong, Tian C. Zhang, Xueyang Zeng, Jun Wan

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Amino-functionalized magnetic zirconium alginate beads with an interpenetrating network (Fe3O4/PAM/SA–Zr) were prepared, characterized, and then tested as a novel biomass adsorbent for phosphate removal and recovery. The hydrogel beads exhibited outstanding thermostability and possessed a magnetic response. The effects of the pH, dosage, initial phosphate concentration, interference ions, and temperature on the removal of phosphate were investigated. The kinetics, isotherms, and thermodynamics of the adsorption were studied. Notably, the adsorption of phosphate was endothermic, feasible, and spontaneous with a maximum uptake capacity of 42.23 mg-P/g at an optimized pH of 2.0. The phosphate could be desorbed effectively with a 0.2 mol/L NaOH solution, and the adsorbent exhibited a good reusability. The possible adsorption mechanisms were verified by zeta potential, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy analyses. Continuous phosphate-adsorption tests were conducted in a fixed-bed columns packed with Fe3O4/PAM/SA–Zr, and the breakthrough curves were predicted by the Adams–Bohart, Thomas, and Yoon–Nelson models, respectively. The suitability of the hydrogel beads for the treatment of real wastewater was also tested. These hydrogel beads should be a promising adsorbent for phosphate removal and recovery from aqueous solutions, with the advantages of a high uptake capacity, good reusability, and easy magnetic separation.

Original languageEnglish (US)
Article number46897
JournalJournal of Applied Polymer Science
Volume136
Issue number1
DOIs
StatePublished - Jan 5 2019

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Alginate
Zirconium
Phosphates
Recovery
Hydrogel
Hydrogels
Adsorbents
Adsorption
Pulse amplitude modulation
Reusability
Magnetic separation
Interpenetrating polymer networks
Zeta potential
alginic acid
Fourier transform infrared spectroscopy
Isotherms
Biomass
Wastewater
X ray photoelectron spectroscopy
Thermodynamics

Keywords

  • adsorption
  • applications
  • copolymers

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Amino-functionalized magnetic zirconium alginate beads for phosphate removal and recovery from aqueous solutions. / Luo, Huayong; Rong, Hongwei; Zhang, Tian C.; Zeng, Xueyang; Wan, Jun.

In: Journal of Applied Polymer Science, Vol. 136, No. 1, 46897, 05.01.2019.

Research output: Contribution to journalArticle

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