Design and fabrication of an innovative and environmental friendly adsorbent for boron removal

Yu Ting Wei, Yu Ming Zheng, J. Paul Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

85 Scopus citations

Abstract

Boron can pose adverse effects on human beings and plants species. It exists in various water environments and is difficult to be removed by conventional technologies. In this study, an efficient and environmental friendly sorbent was fabricated by the functionalization of a natural biopolymer, chitosan, with N-methylglucamine through atom transfer radical polymerization. The SEM and BET studies revealed that the sorbent had a rougher surface and a more porous structure than the chitosan. At the optimum neutral pH, the maximum sorption capacity was as high as 3.25 mmol/g, much higher than the commercial boron selective resins (e.g., Amberlite IRA-743) and many other synthesized sorbents. Almost 90% of boron sorption occurred within 8 h and the equilibrium was established in 12 h, which was well described by an intraparticle surface diffusion model. The presence of sodium chloride and sodium nitrate had no effect on the boron removal. The boron concentration in seawater could be reduced to less than 0.5 mg/L from 4.8 mg/L when a sorbent dosage of 1.2 g/L was used. It was therefore concluded that the sorption technology from this study could be promising for boron removal from aqueous solutions.

Original languageEnglish
Pages (from-to)2297-2305
Number of pages9
JournalWater Research
Volume45
Issue number6
DOIs
StatePublished - Mar 2011
Externally publishedYes

Keywords

  • Atom transfer radical polymerization
  • Boron
  • Chitosan
  • Electrostatic extrusion
  • N-Methylglucamine
  • Sorption

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