Evaluation of amine-functionalized acrylic ion exchange fiber for chromium(VI) removal using flow-through experiments modeling and real wastewater

Aram Nam, Ung Su Choi, Seong Taek Yun, Jae Woo Choi, Jeong Ann Park, Sang-Hyup Lee

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Poly(acrylo-amidino diethylenediamine) (PADD), fibrous form of anion exchangers, was synthesized to remove Cr(VI). The experimental results were described well by the Langmuir isotherm model (Qmax = 4.67 mmol/g) and pseudo second-order model. The Cr(VI) adsorption capacities were increased by decreasing pH because the –NH2 in PADD become more positively charged. During five regeneration cycles, Cr(VI) adsorption capacity retained over 95.96% of the initial capacity. Color of the PADD (yellow) changed to green owing to Cr(VI) reduction to Cr(III) and amine transformed into a oxidized form (imine). The PADD was successfully treated Cr(VI) in two different concentrations of industrial wastewater.

Original languageEnglish
Pages (from-to)187-195
Number of pages9
JournalJournal of Industrial and Engineering Chemistry
Volume66
DOIs
Publication statusPublished - 2018 Oct 25

Keywords

  • Amine-functionalized acrylic fiber
  • Breakthrough curve model analysis
  • Chromium(VI)
  • Fixed-bed column
  • Ion exchange fiber
  • Real industrial plating wastewater

ASJC Scopus subject areas

  • Chemical Engineering(all)

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