Removal of phthalate esters by alpha-cyclodextrin-linked chitosan bead

Bioresour Technol. 2007 Sep;98(13):2578-83. doi: 10.1016/j.biortech.2006.09.009. Epub 2006 Oct 25.

Abstract

Removal of phthalate esters (PAEs) by alpha-cyclodextrin (CD)-linked chitosan bead in aqueous solution was studied. Results of kinetic experiments indicated that diheptyl phthalate (DHpP) was adsorbed most efficiently (3.21 mg/g) among the six PAEs. DHpP recovery was 94.6% from alpha-CD-linked chitosan bead by shaking both with a mixture of methanol and water (v/v = 8/2). The recovered alpha-CD chitosan bead was reusable as an adsorbent 20 times in the batch tests. The adsorbed PAE by alpha-CD-linked chitosan bead decreased as temperature increased. However, coexisting pH, NaCl, and Ca2+ did not affect adsorption efficiency. It was concluded that the application of low cost alpha-CD-linked chitosan bead could have the potential to effectively remove PAEs from different aquatic environments.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Calcium / chemistry
  • Chitosan / chemistry*
  • Esters / isolation & purification
  • Hydrogen-Ion Concentration
  • Kinetics
  • Phthalic Acids / isolation & purification*
  • Sodium Chloride / chemistry
  • Temperature
  • alpha-Cyclodextrins / chemistry*

Substances

  • Esters
  • Phthalic Acids
  • alpha-Cyclodextrins
  • Sodium Chloride
  • Chitosan
  • Calcium
  • alpha-cyclodextrin