Adsorption of arsenic on multiwall carbon nanotube-zirconia nanohybrid for potential drinking water purification

J Colloid Interface Sci. 2012 Jun 1;375(1):154-9. doi: 10.1016/j.jcis.2012.01.063. Epub 2012 Feb 28.


The adsorptive removal of arsenic from water using a multiwall carbon nanotube-zirconia nanohybrid (MWCNT-ZrO(2)) is presented. The MWCNT-ZrO(2) with 4.85% zirconia was effective in meeting the drinking water standard levels of 10 μg L(-1). The absorption capacity of the composite were 2000 μg g(-1) and 5000 μg g(-1) for As(III) and As(V) respectively, which were significantly higher than those reported previously for iron oxide coated MWCNTs. The adsorption of As(V) on MWCNT-ZrO(2) was faster than that of As(III), and a pseudo-second order rate equation effectively described the uptake kinetics. The adsorption isotherms for As(III) and As(V) fitted both the Langmuir and Freundlich models. A major advantage of the MWCNT-ZrO(2) was that the adsorption capacity was not a function of pH.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Arsenic / chemistry*
  • Drinking Water / chemistry*
  • Hydrogen-Ion Concentration
  • Kinetics
  • Microscopy, Atomic Force
  • Nanotubes, Carbon / chemistry*
  • Sensitivity and Specificity
  • Spectroscopy, Fourier Transform Infrared
  • Thermodynamics
  • Water Pollutants, Chemical / chemistry*
  • Water Purification / methods
  • X-Ray Diffraction
  • Zirconium / chemistry*


  • Drinking Water
  • Nanotubes, Carbon
  • Water Pollutants, Chemical
  • Zirconium
  • Arsenic
  • zirconium oxide