Generation of hydroxyl radicals and singlet oxygen by particulate matter and its inorganic components
PBN-AR
Instytucja
Wydział Fizyki i Informatyki Stosowanej (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Environmental Pollution (40pkt w roku publikacji)
ISSN
0269-7491
EISSN
1873-6424
Wydawca
Elsevier Science Ltd.
DOI
Rok publikacji
2018
Numer zeszytu
Strony od-do
638--646
Numer tomu
238
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.64
Autorzy
(liczba autorów: 6)
Pozostali autorzy
+ 5
Streszczenia
Język
EN
Treść
Particulate matter (PM) can strongly affect redox biochemistry and therefore induce the response of the immune system and aggravate the course of autoimmune diseases. Nanoparticles containing transition metal compounds possessing semiconductor properties (TiO2, ZnO) may act as photocatalysts and accelerate the generation of reactive oxygen species (ROS) and reactive nitrogen species (RNS). In this study, the NIST standard reference material, SRM 1648a, has been analyzed in terms of this consideration. Organic compounds present in SRM 1648a were removed by cold oxygen plasma treatment. Samples of SRM 1648a with removed organic content (<2% of organic carbon, <1% of nitrogen) were obtained within 2 h of this treatment. The treatment did not affect the morphology of the powder. The reference material and PM2.5 collected in Kraków are composed of smaller particles and nanoparticles forming aggregates. The efficiency of (photo)generation of hydroxyl radicals and singlet oxygen was compared for original and organics-free samples. The analyzed samples showed the highest activity towards ROS generation when exposed to UV-vis-NIR light, moderate under UV irradiation, and the lowest in dark. Data collected in the present study suggest that the organic fraction is mostly responsible for singlet oxygen generation, as almost twice higher efficiency of 1O2 generation was observed for the original NIST sample compared to the material without the organic fraction. However, particulate matter collected in Kraków was found to have a five times higher activity in singlet oxygen generation (compared for original NIST and Kraków dust samples).
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:113650
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