TY - JOUR
T1 - Treatment of a real water matrix inoculated with Aspergillus fumigatus using a photocatalytic membrane reactor
AU - Oliveira, Beatriz Reis
AU - Sanches, Sandra Marisa Lourenço
AU - Huertas, Rosa Maria
AU - Barreto Crespo, Maria Teresa
AU - Pereira, Vanessa Jorge
N1 - Financial support from Fundação para a Ciência e a Tecnologia through the fellowship SFRH/BD/111150/2015 and the project PTDC/EAM-AMB/30989/2017 are gratefully acknowledged.
iNOVA4Health - UID/Multi/04462/2013, a program financially supported by Fundacao para a Ciencia e Tecnologia/Ministério da Educação e Ciência, through national funds and co-funded by FEDER under the PT2020 Partnership Agreement is acknowledged.
Funding from INTERFACE Programme, through the Innovation, Technology and Circular Economy Fund (FITEC), is gratefully acknowledged.
The authors also thank the company SYSMEX that has kindly provided the flow cytometer equipment used in these experiments.
PY - 2020/3/15
Y1 - 2020/3/15
N2 - Coupling UV photolysis, stable photoactive TiO2 layers and water filtration in a single photocatalytic membrane reactor can be beneficial to achieve high quality drinking water since the membrane retains microorganisms and chemical pollutants whereas the photocatalytic treatment decreases fouling components and treats the concentrated retentate. In this work, a newly designed photocatalytic membrane reactor combining filtration with UV photolysis/photocatalysis under a low pressure mercury lamp (wavelength emission at 254 nm) using ceramic modified membranes was used to treat filtered surface water inoculated with Aspergillus fumigatus. The photocatalytic membranes used in this study were produced using an environmental friendly modification process. Results showed high percentages of adsorption and retention of the spores for both the unmodified and modified membrane. The lower pore size of the modified membrane has the advantage of retaining the spores at the surface instead of trapping the spores inside as observed for the unmodified membrane. Direct photolysis achieved retentate treatment percentages up to 99% after 60 min of treatment. The effect of the combined treatment showed that direct photolysis and photocatalysis were able to cause the deformation of spores and led to changes in membrane permeability and enzymatic activity.
AB - Coupling UV photolysis, stable photoactive TiO2 layers and water filtration in a single photocatalytic membrane reactor can be beneficial to achieve high quality drinking water since the membrane retains microorganisms and chemical pollutants whereas the photocatalytic treatment decreases fouling components and treats the concentrated retentate. In this work, a newly designed photocatalytic membrane reactor combining filtration with UV photolysis/photocatalysis under a low pressure mercury lamp (wavelength emission at 254 nm) using ceramic modified membranes was used to treat filtered surface water inoculated with Aspergillus fumigatus. The photocatalytic membranes used in this study were produced using an environmental friendly modification process. Results showed high percentages of adsorption and retention of the spores for both the unmodified and modified membrane. The lower pore size of the modified membrane has the advantage of retaining the spores at the surface instead of trapping the spores inside as observed for the unmodified membrane. Direct photolysis achieved retentate treatment percentages up to 99% after 60 min of treatment. The effect of the combined treatment showed that direct photolysis and photocatalysis were able to cause the deformation of spores and led to changes in membrane permeability and enzymatic activity.
KW - Aspergillus fumigatus
KW - Membrane permeability effect
KW - Morphology effect
KW - Photocatalytic membrane reactor
KW - Surface water
UR - http://www.scopus.com/inward/record.url?scp=85077926819&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2019.117788
DO - 10.1016/j.memsci.2019.117788
M3 - Article
AN - SCOPUS:85077926819
VL - 598
JO - Journal of Membrane Science
JF - Journal of Membrane Science
SN - 0376-7388
M1 - 117788
ER -