Abstract
MTBE (methyl tert-butyl ether) represents a rising threat to the environment, especially drinking water, and its effective removal (with all by-products) is necessary. Even a very low concentration of MTBE makes the water undrinkable; therefore, an effective treatment has to be developed. This work is focused on MTBE photocatalytic oxidation in presence of various TiO2 photocatalysts with different phase composition prepared by different methods. It was confirmed the phase composition of TiO2 had the most significant influence on the photocatalytic degradation of MTBE. The rutile phase more easily reduces adsorbed oxygen by photogenerated electrons to superoxide radical, supporting separation of charge carriers. The presence and concentrations of by-products have to be taken into account as well. The conversion of total organic carbon (TOC) was used for the comparison, 40% of TOC was removed after 1 h of irradiation in presence of TiO2–ISOP–C/800 photocatalyst composed of anatase and rutile phase.
Highlights
Environmental protection, especially water and air, is representing a serious challenge for current science
This work is investigating the photocatalytic degradation of methyl tert-butyl ether in presence of various TiO2 photocatalysts with different phase composition prepared by different methods
TiO2 photocatalysts prepared from titanium (IV) isopropoxide (TiO2 –ISOP–C/400, TiO2 –ISOP–PFC), the second one includes TiO2 photocatalyst prepared from titanyl sulphate (TiO2 –TYS–C/450)
Summary
Environmental protection, especially water and air, is representing a serious challenge for current science. Main sources of MTBE are accidental fuel leakages during transportation of storage containers and car accidents, and unburned gasoline spilled from boats directly to surface waters [1]. There are several methods for removing MTBE from water, for example, various adsorptions, air stripping, biodegradation, electrochemical oxidation, and advanced oxidation processes. All these methods are described and discussed in a review paper focused on technologies for removal of MTBE [1]. Especially photocatalysis proved to be a very promising method It is the vision of very low costs for operating the technology that makes it so interesting. This work is investigating the photocatalytic degradation of methyl tert-butyl ether in presence of various TiO2 photocatalysts with different phase composition prepared by different methods
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