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July 15, 2013Journal of nanostructure in chemistryOpen Access

Pseudo-second-order kinetic equations for modeling adsorption systems for removal of lead ions using multi-walled carbon nanotube

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Authors

DRD. Robati

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Overview

Laboratory study demonstrates effective lead removal using multi-walled carbon nanotubes, indicating their strong potential for water purification.

Key Points

  • To assess the performance and adsorption kinetics of pristine and oxidized multi-walled carbon nanotubes for the removal of lead ions from aqueous solutions.
  • Tested lead ion removal across aqueous concentrations ranging from 10 to 100 mg/L using pristine (MWCNTs) and oxidized (MWCNT-COOH) carbon nanotubes.
  • Characterized nanotube surface structures using scanning electron microscopy and quantified lead concentrations by atomic absorption spectrophotometry.
  • Modeled kinetic rates using pseudo-first-order, four linear pseudo-second-order, and intraparticle diffusion equations.
  • The pseudo-second-order kinetic model most effectively described the adsorption rate and mechanism of lead ions onto the carbon nanotube surfaces.
  • Both pristine and oxidized multi-walled carbon nanotubes demonstrated high adsorption potential for clearing aqueous lead ions.

Cite This Study

D. Robati (2013) studied this question.

synapsesocial.com/papers/69dee8f04838c5c0bab0d585https://doi.org/10.1186/2193-8865-3-55
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