Degradation of the cyanotoxin microcystin-LR using iron-based photocatalysts under visible light illumination
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F17%3A73583082" target="_blank" >RIV/61989592:15310/17:73583082 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1007/s11356-017-9566-4" target="_blank" >https://link.springer.com/article/10.1007/s11356-017-9566-4</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11356-017-9566-4" target="_blank" >10.1007/s11356-017-9566-4</a>
Alternative languages
Result language
angličtina
Original language name
Degradation of the cyanotoxin microcystin-LR using iron-based photocatalysts under visible light illumination
Original language description
In this study, a simple and low-cost method to synthesize iron(III) oxide nanopowders in large quantity was successfully developed for the photocatalytic degradation of microcystin-LR (MC-LR). Two visible light-active iron(III) oxide samples (MG-9 calcined at 200 A degrees C for 5 h and MG-11 calcined at 180 A degrees C for 16 h) with a particle size of 5-20 nm were prepared via thermal decomposition of ferrous oxalate dihydrate in air without any other modifications such as doping. The synthesized samples were characterized by X-ray powder diffraction, Fe-57 Mossbauer spectroscopy, transmission electron microscopy, Brunauer-Emmett-Teller (BET) specific surface area analysis, and UV-visible diffuse reflectance spectroscopy. The samples exhibited similar phase composition (a mixture of alpha-Fe2O3 and gamma-Fe2O3), particle size distribution (5-20 nm), particle morphology, and degree of agglomeration, but different specific surface areas (234 m(2) g(-1) for MG-9 and 207 m(2) g(-1) for MG-11). The results confirmed higher photocatalytic activity of the catalyst with higher specific surface area. The highest photocatalytic activity of the sample to decompose MC-LR was observed at solution pH of 3.0 and catalyst loading of 0.5 g L-1 due to large amount of MC-LR adsorption, but a little iron dissolution of 0.0065 wt% was observed. However, no iron leaching was observed at pH 5.8 even though the overall MC-LR removal was slightly lower than at pH 3.0. Thus, the pH 5.8 could be an appropriate operating condition for the catalyst to avoid problems of iron contamination by the catalyst. Moreover, magnetic behavior of gamma-Fe2O3 gives a possibility for an easy separation of the catalyst particles after their use.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Environmental Science and Pollution Research
ISSN
0944-1344
e-ISSN
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Volume of the periodical
24
Issue of the periodical within the volume
23
Country of publishing house
DE - GERMANY
Number of pages
9
Pages from-to
19435-19443
UT code for WoS article
000407723100063
EID of the result in the Scopus database
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