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Journal of Nanoparticle Research

, Volume 13, Issue 12, pp 6673–6681 | Cite as

Encapsulation of iron nanoparticles in alginate biopolymer for trichloroethylene remediation

  • Achintya N. Bezbaruah
  • Sai Sharanya Shanbhogue
  • Senay Simsek
  • Eakalak Khan
Research Paper

Abstract

Nanoscale zero-valent iron (NZVI) particles (10–90 nm) were encapsulated in biodegradable calcium-alginate capsules for the first time for application in environmental remediation. Encapsulation is expected to offers distinct advances over entrapment. Trichloroethylene (TCE) degradation was 89–91% in 2 h, and the reaction followed pseudo first order kinetics for encapsulated NZVI systems with an observed reaction rate constant (k obs) of 1.92–3.23 × 10−2 min−1 and a surface normalized reaction rate constant (k sa) of 1.02–1.72 × 10−3 L m−2 min−1. TCE degradation reaction rates for encapsulated and bare NZVI were similar indicating no adverse affects of encapsulation on degradation kinetics. The shelf-life of encapsulated NZVI was found to be four months with little decrease in TCE removal efficiency.

Keywords

Nanoscale zero-valent iron (NZVI) Encapsulated NZVI Trichloroethylene (TCE) Calcium-alginate Biopolymer Environmental remediation 

Notes

Acknowledgments

This research was supported by USGS/North Dakota Water Resources Research Institute (NDWRRI). The help from the members (especially Mr. Harjyoti Kalita and Ms. Sita Krajangpan) of Nanoenvirology Research Group (NRG) and Environmental Engineering Laboratory of North Dakota State University is thankfully acknowledged.

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Achintya N. Bezbaruah
    • 1
    • 2
  • Sai Sharanya Shanbhogue
    • 1
    • 2
  • Senay Simsek
    • 3
  • Eakalak Khan
    • 2
  1. 1.Nanoenvirology Research Group (NRG)North Dakota State UniversityFargoUSA
  2. 2.Department of Civil EngineeringNorth Dakota State UniversityFargoUSA
  3. 3.Department of Plant SciencesNorth Dakota State UniversityFargoUSA

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