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Evaluation of trichloroethylene degradation by starch supported Fe/Ni nanoparticles via response surface methodology

Nikroo, R ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.2166/wst.2015.566
  3. Publisher: IWA Publishing
  4. Abstract:
  5. In this study, degradation of trichloroethylene (TCE), a chlorinated hydrocarbon, using starch supported Fe/Ni nanoparticles was investigated. The scanning electron microscope images showed applying water soluble starch as a stabilizer for the Fe/Ni nanoparticles tended to reduce agglomeration and discrete particle. Also the mean particle diameter reduced from about 70 nm (unsupported Fe/Ni nanoparticle) to about 30 nm. Effects of three key independent operating parameters including initial TCE concentration (10.0-300.0 mg L-1), initial pH (4.00-10.00) and Fe0 dosage (0.10-2.00) g L-1 on TCE dechlorination efficiency in 1 hour were analysed by employing response surface methodology (RSM). Based on a five-level three-factor central composite design, TCE removal efficiency was examined and optimized. The obtained RSM model fitted the experimental data to a second order polynomial equation. The optimum dechlorination conditions at initial TCE concentration 100.0 mgL-1 were initial pH 5.77, Fe0 dosage 1.67 g L-1. At these conditions TCE removal concentration reached 94.87%, which is in close acceptance with predicted value by the RSM model
  6. Keywords:
  7. Response surface methodology ; Starch supported Fe/Ni nanoparticles ; Anesthetics ; Efficiency ; Nanoparticles ; Polynomials ; Scanning electron microscopy ; Surface properties ; Trichloroethylene ; Central composite designs ; Chlorinated hydrocarbon ; Mean particle diameter ; Operating parameters ; Removal efficiencies ; Second-order polynomial equations ; Water soluble starch ; Concentration (composition) ; Dechlorination ; Degradation ; Efficiency measurement ; Experimental study ; Iron ; Numerical method ; Nickel ; Trichloroethylene ; Chemistry ; Devices ; Ecosystem restoration ; Evaluation study ; Procedures ; Environmental Restoration and Remediation ; Halogenation ; Iron ; Nanoparticles ; Starch ; Trichloroethylene
  8. Source: Water Science and Technology ; Volume 73, Issue 4 , 2016 , Pages 935-946 ; 02731223 (ISSN)
  9. URL: http://wst.iwaponline.com/content/73/4/935