Kinetics, isotherm, and thermodynamic study of adsorption of zinc ions from aqueous solution by use of polyamidoamine dendrimer starch

Kinetics, isotherm, and thermodynamic study of adsorption of zinc ions from aqueous solution by... A polyamidoamine dendrimer starch (PSt) was prepared and used to adsorb zinc ions from aqueous solution. Conditions affecting the amount of zinc ion adsorbed, for example treatment time, initial concentration of zinc ions, and pH of the solution, were investigated, and the equilibrium, thermodynamics, and kinetics of the adsorption process were further researched. The results showed that the equilibrium data followed the Langmuir isotherm. The maximum adsorption capacities of G1PSt (first generation polyamidoamine dendrimer starch), G2PSt (second generation polyamidoamine dendrimer starch), and G4PSt (fourth generation polyamidoamine dendrimer starch) used in this study were 3.2841, 3.5249, and 4.016 mmol/g, respectively, for zinc ions at 30 °C. The adsorption results revealed that the equilibrium time was approximately 30 min, and the pseudo-second-order kinetic model was a very good fit to the dynamic adsorption behavior of zinc ions. When the pH of the solution was adjusted below 3.0, PSt was no longer an effective zinc ion-sequestering agent. Moreover, the thermodynamic investigation demonstrated that the adsorption process was endothermic, and the enthalpy change (∆H θ), the entropy change (∆S θ), and free energy change (∆G θ) of the adsorption process were calculated by use of adsorption isotherm data and basic thermodynamic relationships. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Kinetics, isotherm, and thermodynamic study of adsorption of zinc ions from aqueous solution by use of polyamidoamine dendrimer starch

Loading next page...
 
/lp/springer_journal/kinetics-isotherm-and-thermodynamic-study-of-adsorption-of-zinc-ions-JhP0GqHcxV
Publisher
Springer Netherlands
Copyright
Copyright © 2013 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-013-1369-8
Publisher site
See Article on Publisher Site

Abstract

A polyamidoamine dendrimer starch (PSt) was prepared and used to adsorb zinc ions from aqueous solution. Conditions affecting the amount of zinc ion adsorbed, for example treatment time, initial concentration of zinc ions, and pH of the solution, were investigated, and the equilibrium, thermodynamics, and kinetics of the adsorption process were further researched. The results showed that the equilibrium data followed the Langmuir isotherm. The maximum adsorption capacities of G1PSt (first generation polyamidoamine dendrimer starch), G2PSt (second generation polyamidoamine dendrimer starch), and G4PSt (fourth generation polyamidoamine dendrimer starch) used in this study were 3.2841, 3.5249, and 4.016 mmol/g, respectively, for zinc ions at 30 °C. The adsorption results revealed that the equilibrium time was approximately 30 min, and the pseudo-second-order kinetic model was a very good fit to the dynamic adsorption behavior of zinc ions. When the pH of the solution was adjusted below 3.0, PSt was no longer an effective zinc ion-sequestering agent. Moreover, the thermodynamic investigation demonstrated that the adsorption process was endothermic, and the enthalpy change (∆H θ), the entropy change (∆S θ), and free energy change (∆G θ) of the adsorption process were calculated by use of adsorption isotherm data and basic thermodynamic relationships.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Aug 22, 2013

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve Freelancer

DeepDyve Pro

Price
FREE
$49/month

$360/year
Save searches from
Google Scholar,
PubMed
Create lists to
organize your research
Export lists, citations
Read DeepDyve articles
Abstract access only
Unlimited access to over
18 million full-text articles
Print
20 pages/month
PDF Discount
20% off