Electrophoretically deposited TiO2 layers for efficient photocatalytic degradation of antibiotic mixture in greywater

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F24%3A00587303" target="_blank" >RIV/61388955:_____/24:00587303 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22330/24:43928999

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2214714424008869?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2214714424008869?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jwpe.2024.105654" target="_blank" >10.1016/j.jwpe.2024.105654</a>

Result language

angličtina

Original language name

Electrophoretically deposited TiO2 layers for efficient photocatalytic degradation of antibiotic mixture in greywater

Original language description

Efficient removal of pharmaceuticals from greywater is crucial to enable its application for non-potable use. TiO2 photocatalysis is a promising environmentally friendly way of streamlining their complete degradation. However, dispersed TiO2 nanopowders are unsuitable for greywater treatment procedures because they require separation and may aggregate, thereby losing photocatalytic activity. Thus, TiO2 nanopowders (anatase 5 and 100 nm, AEROXIDE® P 25) were immobilized into layers by quantitative electrophoretic deposition. The layer ability to degrade the commonly used antibiotics ampicillin and sulfathiazole in deionized water was monitored using HPLC-PDA analysis and compared with that of the respective nanopowders. All layers attained total conversion of the initial antibiotics (limit of detection 50–100 μg L−1) with the highest degradation rate constant corresponding to 66 × 10−4 min−1 for AEROXIDE® P25 layer. To evaluate the efficiency of the prepared layers under more realistic conditions, collected greywater was treated in a membrane bioreactor, spiked with an equimolar antibiotic mixture, and subjected to photocatalysis. The overall reaction rate constants were calculated as 54, 15 and 75 × 10−4 min−1 for 5 and 100 nm anatase and AEROXIDE® P25 layers, respectively. The best-performing layer achieved complete removal and 68 % total mineralization of the antibiotic mixture in greywater within 7 and 24 h, respectively. For this layer, the developed regeneration method recovered min. 94 % of the original photocatalytic activity, enabling its reusability. These results suggest that our presented deposition method provides layers capable of degrading antibiotic mixtures in greywater effectively and is suitable for upscaling due to its low cost and simplicity.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10403 - Physical chemistry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Water Process Engineering

ISSN

2214-7144

e-ISSN

2214-7144

Volume of the periodical

64

Issue of the periodical within the volume

JUL 2024

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

10

Pages from-to

105654

UT code for WoS article

001299538000001

EID of the result in the Scopus database

2-s2.0-85196297629