TY - JOUR
T1 - Hybrid Chitosan-Silver Nanoparticles Enzymatically Embedded on Cork Filter Material for Water Disinfection
AU - Garcia Peña, Lina Vanesa
AU - Petkova, Petya
AU - Margalef-Marti, Rosanna
AU - Vives, Marc
AU - Aguilar, Lorena
AU - Gallegos, Angel
AU - Francesko, Antonio
AU - Perelshtein, Ilana
AU - Gedanken, Aharon
AU - Mendoza, Ernest
AU - Casas-Zapata, Juan Carlos
AU - Morató, Jordi
AU - Tzanov, Tzanko
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/4/5
Y1 - 2017/4/5
N2 - Microbial contamination remains a major challenge in drinking water supplies in developing regions, despite the continuous advances being made in water purification processes. The spread and transmission of pathogens due to consuming unsafe water culminate in waterborne diseases and increased number of deaths worldwide. Recently, the application of nanotechnology for water purification, and in particular the use of antibacterial nanoparticles (NPs) to control microbial contaminations, has received considerable interest. In this study, antibacterial chitosan-silver nanoparticles (CS/AgNPs) were enzymatically grafted on cork matrixes to design a water purification point-of-use device. The antibacterial efficiency of the constructed filtering system was further evaluated against water severely contaminated with Escherichia coli (∼107 CFU/mL). The system was tested in two operating filtration modes with varied water residence times. The antibacterial nanocomposite decreased the water bacterial contamination by 4 and 5 log CFU/mL when performing a series of continuous short disinfection cycles of 15 min residence time (experiment I). Nevertheless, complete bacteria removal was achieved only after increasing the water residence time in the filters up to 8 h (experiment II). Durability of the system was demonstrated via performing five disinfection cycles after which the hybrid CS/AgNPs remained on the cork surface. Importantly, the antibacterial nanocomposite prevented bacteria attachment and proliferation during all cycles of the disinfection process.
AB - Microbial contamination remains a major challenge in drinking water supplies in developing regions, despite the continuous advances being made in water purification processes. The spread and transmission of pathogens due to consuming unsafe water culminate in waterborne diseases and increased number of deaths worldwide. Recently, the application of nanotechnology for water purification, and in particular the use of antibacterial nanoparticles (NPs) to control microbial contaminations, has received considerable interest. In this study, antibacterial chitosan-silver nanoparticles (CS/AgNPs) were enzymatically grafted on cork matrixes to design a water purification point-of-use device. The antibacterial efficiency of the constructed filtering system was further evaluated against water severely contaminated with Escherichia coli (∼107 CFU/mL). The system was tested in two operating filtration modes with varied water residence times. The antibacterial nanocomposite decreased the water bacterial contamination by 4 and 5 log CFU/mL when performing a series of continuous short disinfection cycles of 15 min residence time (experiment I). Nevertheless, complete bacteria removal was achieved only after increasing the water residence time in the filters up to 8 h (experiment II). Durability of the system was demonstrated via performing five disinfection cycles after which the hybrid CS/AgNPs remained on the cork surface. Importantly, the antibacterial nanocomposite prevented bacteria attachment and proliferation during all cycles of the disinfection process.
UR - http://www.scopus.com/inward/record.url?scp=85019544516&partnerID=8YFLogxK
U2 - 10.1021/acs.iecr.6b04721
DO - 10.1021/acs.iecr.6b04721
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AN - SCOPUS:85019544516
SN - 0888-5885
VL - 56
SP - 3599
EP - 3606
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 13
ER -