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Performance of silver nanoparticle fixed on magnetic iron nanoparticles (Fe3O4−Ag) in water disinfection

Sharifi, R ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1049/mnl.2016.0727
  3. Publisher: Institution of Engineering and Technology , 2018
  4. Abstract:
  5. Microbial contamination poses a serious threat to human health. The evaluation of alternative systems and their reliability for the treatment of water is essential. In this work, a new method for the deposit of more silver nanoparticles (AgNPs) on the external surface of Fe3O4 nanoparticles is presented. Fe3O4 nanoparticles were synthesised by chemical co-precipitation and were modified in two stages using 3-mercaptopropyl trimethoxysilane and grafting allyl glycidyl ether and N, N-dimethylacrylamide. Then, AgNPs were loaded onto the modified Fe3O4 to be used for water disinfection. The resulting nanoparticles were characterised by transmission electron microscopy, X-ray powder diffraction, Fourier transform infrared spectroscopy, vibrating sample magnetometer and thermal gravimetric analysis. Batch experiments were performed to investigate the effects of parameters such as amount of Fe3O4 − Ag, contact time, and initial concentrations of MPN (the most probable number) and pH. The kinetic data was analysed by pseudo-first-order and pseudo-second-order equations. Results showed that the optimum conditions were a contact time of 30 min (94%), 50 mg of Fe3O4 − Ag, and a pH was 6.5 for the maximum MPN removal efficiency (99.76%) in 750 cfu/ml MPN. On the basis of the results of fitting data, the pseudo-second-order kinetic model was selected as suitable for the data. © The Institution of Engineering and Technology 2017
  6. Keywords:
  7. Disinfection ; Fourier transform infrared spectroscopy ; Grafting (chemical) ; Gravimetric analysis ; Health risks ; High resolution transmission electron microscopy ; Iron ; Iron oxides ; Magnetite ; Metal nanoparticles ; Nanomagnetics ; Precipitation (chemical) ; Silver nanoparticles ; Thermogravimetric analysis ; Transmission electron microscopy ; Water treatment ; X ray powder diffraction ; 3-mercaptopropyl trimethoxysilane ; Chemical co-precipitation ; Microbial contamination ; Pseudo-second-order equations ; Pseudo-second-order kinetic models ; Silver nanoparticles (AgNps) ; Thermal gravimetric analysis ; Vibrating sample magnetometer ; Silver compounds
  8. Source: Micro and Nano Letters ; Volume 13, Issue 4 , April , 2018 , Pages 436-441 ; 17500443 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/8332196