Aquatic environment

Removal of perchlorate from aqueous solution by cross-linked Fe(Ⅲ)-chitosan complex

Long Lv , Yanhua Xie , Guoming Liu , Guo Liu , Jing Yu


Received June 19, 2013,Revised November 12, 2013, Accepted , Available online March 24, 2014

Volume 26,2014,Pages 792-800

Cross-linked Fe(Ⅲ)-chitosan composite (Fe-CB) was used as the adsorbent for removing perchlorate from the aqueous solution. The adsorption experiments were carried out by varying contact time, initial concentrations, temperatures, pH, and the presence of co-existing anions. The morphology of the adsorbent was discussed using FT-IR and SEM with X-EDS analysis. The pH ranging from 3.0-10.2 exhibited very little effect on the adsorption capability. The perchlorate uptake onto Fe-CB obeyed Langmuir isotherm model. The adsorption process was rapid and the kinetics data obeyed the pseudo second-order model well. The eluent of 2.5% (W/V) NaCl could regenerate the exhausted adsorbent efficiently. The adsorption mechanism was also discussed.

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