Novel negatively charged hybrids. 3. Removal of Pb2+ from aqueous solution using zwitterionic hybrid polymers as adsorbent

J Hazard Mater. 2010 Jan 15;173(1-3):438-44. doi: 10.1016/j.jhazmat.2009.08.097. Epub 2009 Aug 27.

Abstract

Using zwitterionic hybrid polymers as adsorbent, the adsorption kinetics and isotherm, thermodynamic parameters of Delta G, Delta H and DeltaS for the removal of Pb(2+) from aqueous solution were investigated. It is indicated that the adsorption of Pb(2+) ions on these zwitterionic hybrid polymers followed the Lagergren second-order kinetic model and Freundlich isotherm model, demonstrating that the adsorption process might be Langmuir monolayer adsorption. The negative values of Delta G and the positive values of Delta H evidence that Pb(2+) adsorption on these zwitterionic hybrid polymers is spontaneous and endothermic process in nature. Moreover, the zwitterionic hybrid polymers produced reveal relatively higher desorption efficiency in 2 mol dm(-3) aqueous HNO(3) solution, indicating that they can be recycled in industrial processes. These findings suggest that these zwitterionic hybrid polymers are the promising adsorbents for Pb(2+) removal and can be potentially applied in the separation and recovery of Pb(2+) ions from the waste chemicals and contaminated water of lead-acid rechargeable battery.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adsorption
  • Algorithms
  • Chromatography, Ion Exchange
  • Indicators and Reagents
  • Kinetics
  • Lead / isolation & purification*
  • Models, Theoretical
  • Polymers / chemistry*
  • Solutions
  • Thermodynamics
  • Water

Substances

  • Indicators and Reagents
  • Polymers
  • Solutions
  • Water
  • Lead