Naslov
The potential of Fe-exchanged Y zeolite as a heterogeneous Fenton type catalyst for oxidative degradation of reactive dye in water

Autori
Aleksić, Maja ; Koprivanac, Natalija ; Lončarić Božić, Ana ; Kušić, Hrvoje

Izvornik
Chemical and Biochemical Engineering Quarterly (0352-9568) 24 (2010), 3; 309-319

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
heterogeneous catalysis; Fenton type process; FeY; zeolites; model wastewater; UV irradiation; degradation mechanisms

Sažetak
The study is aimed to investigate the potential of Fe-exchanged zeolites of Y type as a catalyst in heterogeneous Fenton type processes for the degradation of model organic pollutant, reactive azo dye C.I. Reactive Blue 137, in water. The research work was directed to investigate the influence of various process variables, such as FeY catalyst dosage, Fenton reagent ratio and initial operating pH, on the efficiency of treatment process. The performance of studied heterogeneous process was compared with corresponding homogeneous Fenton type processes, as well the influence of UV light on both heterogeneous and homogeneous processes was investigated as well. The results of FeY catalyst characterization indicates that iron content is mainly built-in into the inner zeolite micropores providing the benefit to zeolite stability and activity of the catalyst. On the basis of decolorization and mineralization degree of RB137 model wastewater the overall process efficiency was estimated. Homogeneous and heterogeneous Fenton processes yielded with similar decolorization and mineralization, but the concentration of Fe ions in the bulk after the treatment was significantly lower in the later case. Moreover, the usage of heterogeneous catalyst allowed UV assisted process to be operated at milder pH conditions, pH 5, while for dark heterogeneous process the most suitable pH was shown to be pH 3.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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