Format

Send to

Choose Destination
See comment in PubMed Commons below
J Hazard Mater. 2009 Nov 15;171(1-3):671-7. doi: 10.1016/j.jhazmat.2009.06.053. Epub 2009 Jun 18.

Evaluation of ammonium removal using a chitosan-g-poly (acrylic acid)/rectorite hydrogel composite.

Author information

  • 1Center for Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.

Abstract

This paper concerns the removal of ammonium ions (NH(4)(+)) from aqueous solution using a hydrogel composite chitosan grafted poly (acrylic acid)/rectorite prepared from in situ copolymerization. The effects of rectorite content, contact time, pH, NH(4)(+) concentration and temperature on the adsorption capacity were discussed. Langmuir, Freundlich, Tempkin and Redlich-Peterson isotherms were used to describe the experimental data. The results indicate that the adsorption equilibrium can be achieved within 3-5 min and, the hydrogel composite has a higher adsorption capacity for NH(4)(+) in a wide pH levels ranged from 4.0 to 9.0. No significant changes in the adsorption capacity are found over the temperature range studied. The adsorption mechanism of NH(4)(+) onto hydrogel composite was proposed, and the reusable ability of this hydrogel adsorbent was evaluated.

PMID:
19577362
DOI:
10.1016/j.jhazmat.2009.06.053
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center