An innovative pilot plant based on UVB and TiO2 (Anatase) allowed for photocatalytic degradation of organic micro-pollutants. The catalyst was immobilized onto a channel through which the solution containing a target molecule (Methylene Blue, MB) was recirculated. Due to the cationic nature of the MB substrate, the adsorption reaction onto the catalyst surface provided a significant contribution to the overall degradation mechanism due to the negatively charged surface at neutral pH (TiO2 pHzpc=6.8). The influence of the initial MB concentration was investigated in the range 0.3-2.0 mgL-1 with the Langmuir–Hinshelwood model showing good data correlations at concentrations up to 0.7 mgL-1, whereas at higher concentrations a pure zero-order (catalytic) kinetic trend was observed. Flow-rate of the recirculating solution sensibly influenced kinetics after the larger volumes of liquid exposed to UVB/TiO2 and to the better oxygen saturation in the liquid-phase. UV-Vis and HPLC-MS/MS experimental determinations allowed for identification of MB residual concentration and by-products.

Photocatalytic Oxidation of Organic Micro-Pollutants: Pilot Plant Investigation and Mechanistic Aspects of the Degradation Reaction / Petrella, Andrea; Mascolo, Giuseppe; Murgolo, Sapia; Petruzzelli, Valentina; Ranieri, Ezio; Spasiano, Danilo; Petruzzelli, Domenico. - In: CHEMICAL ENGINEERING COMMUNICATIONS. - ISSN 0098-6445. - 203:10(2016), pp. 1298-1307. [10.1080/00986445.2016.1188292]

Photocatalytic Oxidation of Organic Micro-Pollutants: Pilot Plant Investigation and Mechanistic Aspects of the Degradation Reaction

PETRELLA, Andrea;MASCOLO, Giuseppe;PETRUZZELLI, VALENTINA;RANIERI, Ezio;SPASIANO, Danilo;PETRUZZELLI, Domenico
2016-01-01

Abstract

An innovative pilot plant based on UVB and TiO2 (Anatase) allowed for photocatalytic degradation of organic micro-pollutants. The catalyst was immobilized onto a channel through which the solution containing a target molecule (Methylene Blue, MB) was recirculated. Due to the cationic nature of the MB substrate, the adsorption reaction onto the catalyst surface provided a significant contribution to the overall degradation mechanism due to the negatively charged surface at neutral pH (TiO2 pHzpc=6.8). The influence of the initial MB concentration was investigated in the range 0.3-2.0 mgL-1 with the Langmuir–Hinshelwood model showing good data correlations at concentrations up to 0.7 mgL-1, whereas at higher concentrations a pure zero-order (catalytic) kinetic trend was observed. Flow-rate of the recirculating solution sensibly influenced kinetics after the larger volumes of liquid exposed to UVB/TiO2 and to the better oxygen saturation in the liquid-phase. UV-Vis and HPLC-MS/MS experimental determinations allowed for identification of MB residual concentration and by-products.
2016
Photocatalytic Oxidation of Organic Micro-Pollutants: Pilot Plant Investigation and Mechanistic Aspects of the Degradation Reaction / Petrella, Andrea; Mascolo, Giuseppe; Murgolo, Sapia; Petruzzelli, Valentina; Ranieri, Ezio; Spasiano, Danilo; Petruzzelli, Domenico. - In: CHEMICAL ENGINEERING COMMUNICATIONS. - ISSN 0098-6445. - 203:10(2016), pp. 1298-1307. [10.1080/00986445.2016.1188292]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/73448
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