Preparation and characterization of an organic/inorganic hybrid sorbent (PLE) to enhance selectivity for As(V)

Byungryul An, Hakchan Kim, Sang-Hyup Lee, Jae Woo Choi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

For the selective removal of arsenate (As(V)) a hybrid sorbent was prepared using a non-toxic natural organic material, chitosan, by loading a transition metal, nickel. The immobilization of nickel was achieved by coordination with a deprotonated amino group (NH2) in the chitosan polymer chain. The amount of nickel was directly correlated to the presence of the amino group and was calculated to be 62mg/g. FTIR spectra showed a peak shift from 1656 to 1637cm-1 after Ni2+ loading, indicating the complexation between the amino group and nickel, and a peak of As(V) was observed at 834cm-1. An increase of sulfate concentration from 100mg/L to 200mg/L did not significantly affect As(V) sorption, and an increase in the concentration of bicarbonate reduced the As(V) uptake by 33%. The optimal pH of the solution was determined at pH 10, which is in accordance with the fraction of HAsO4 2- and AsO4 -3. According to a fixed column test, a break through behavior of As(V) revealed that selectivity for As(V) was over sulfate. Regeneration using 5% NaCl extended the use of sorbent to up to uses without big loss of sorption capacity.

Original languageEnglish
Pages (from-to)54-62
Number of pages9
JournalJournal of Hazardous Materials
Volume289
DOIs
Publication statusPublished - 2015 May 1

Fingerprint

Sorbents
Nickel
nickel
Chitosan
Sulfates
Sorption
sorption
sulfate
transition element
Fourier Transform Infrared Spectroscopy
arsenate
Bicarbonates
Complexation
bicarbonate
complexation
Immobilization
immobilization
Transition metals
Regeneration
Polymers

Keywords

  • Arsenate
  • Chitosan
  • Polymeric ligand exchagner
  • Selectivity

ASJC Scopus subject areas

  • Health, Toxicology and Mutagenesis
  • Pollution
  • Waste Management and Disposal
  • Environmental Chemistry
  • Environmental Engineering

Cite this

Preparation and characterization of an organic/inorganic hybrid sorbent (PLE) to enhance selectivity for As(V). / An, Byungryul; Kim, Hakchan; Lee, Sang-Hyup; Choi, Jae Woo.

In: Journal of Hazardous Materials, Vol. 289, 01.05.2015, p. 54-62.

Research output: Contribution to journalArticle

An, Byungryul ; Kim, Hakchan ; Lee, Sang-Hyup ; Choi, Jae Woo. / Preparation and characterization of an organic/inorganic hybrid sorbent (PLE) to enhance selectivity for As(V). In: Journal of Hazardous Materials. 2015 ; Vol. 289. pp. 54-62.
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