TY - JOUR
T1 - Use of nanoparticles for the disinfection of desalinatedwater
AU - Al-Issai, Laila
AU - Elshorbagy, Walid
AU - Maraqa, Munjed A.
AU - Hamouda, Mohamed
AU - Soliman, Ahmed M.
N1 - Funding Information:
Funding: This work was funded by the National Water Center at the UAE University research [grant number 31R007].
Funding Information:
The authors would like to thank Yousef Hayek at Qatar University for his great assistance in preparing the NPs used in this study and Khalid Tarabely and Mohamed Taha from the Biology Department at the UAE University for their support and advice. The authors would also like to thank Tibor Pal from the College of Medicine and Health Sciences at the UAE University for his cooperation and for providing the Enterobacter bacteria. We also thank the anonymous reviewers for their exceptionally useful comments.This work was funded by the National Water Center at the UAE University research [grant number 31R007].
Publisher Copyright:
© 2019 by the authors.
PY - 2019/3/1
Y1 - 2019/3/1
N2 - When chemical disinfection is performed before or after desalination, a number of harmful compounds are formed. Thus, efforts have been directed toward developing alternative methods for water disinfection. In this study, seven nanoparticles (NPs) were evaluated for disinfecting water produced from reverse osmosis and multi-stage flash desalination plants. The tested NPs were silver, copper, silver-copper, zinc oxide, magnesium oxide, silicon dioxide, and carbon nanotubes. The antimicrobial activity of the NPs was investigated by batch studies in desalinated water samples spiked with E. coli, Enterobacter, Salmonella, and Enterococci. The Chick-Watson model was fitted to the inactivation data to evaluate the kinetic constant for each combination of NPs, water type, and indicator bacteria. The results indicated that silver and silver-copper NPs have the highest disinfection efficiency among the tested NPs. Among the bacteria, Enterobacter (strain TPC129) appears to be the most inactivated, while Enterococci (strain NCTC775) seems to be the least influenced by the NPs. Variations in the chemical characteristics of the tested water samples appeared to cause noticeable differences in the antibacterial efficacies of copper and magnesium oxide NPs, but not in those of the other NPs.
AB - When chemical disinfection is performed before or after desalination, a number of harmful compounds are formed. Thus, efforts have been directed toward developing alternative methods for water disinfection. In this study, seven nanoparticles (NPs) were evaluated for disinfecting water produced from reverse osmosis and multi-stage flash desalination plants. The tested NPs were silver, copper, silver-copper, zinc oxide, magnesium oxide, silicon dioxide, and carbon nanotubes. The antimicrobial activity of the NPs was investigated by batch studies in desalinated water samples spiked with E. coli, Enterobacter, Salmonella, and Enterococci. The Chick-Watson model was fitted to the inactivation data to evaluate the kinetic constant for each combination of NPs, water type, and indicator bacteria. The results indicated that silver and silver-copper NPs have the highest disinfection efficiency among the tested NPs. Among the bacteria, Enterobacter (strain TPC129) appears to be the most inactivated, while Enterococci (strain NCTC775) seems to be the least influenced by the NPs. Variations in the chemical characteristics of the tested water samples appeared to cause noticeable differences in the antibacterial efficacies of copper and magnesium oxide NPs, but not in those of the other NPs.
KW - Desalinated drinking water
KW - Disinfection
KW - Nanoparticles
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U2 - 10.3390/w11030559
DO - 10.3390/w11030559
M3 - Article
AN - SCOPUS:85065012204
SN - 2073-4441
VL - 11
JO - Water (Switzerland)
JF - Water (Switzerland)
IS - 3
M1 - 559
ER -