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1 Environment Protection Engineering

1 2022

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Design of UVA-LED concentric glass tube microreactor and evaluation of photocatalysis with simultaneous adsorption and hydrodynamic cavitation for fluorescent dye degradation

Sundar Kaviya Piriyah, Kanmani Sellappa

Environment Protection Engineering

2022

Vol. 48, nr 1

5--22

A slurry UVA-LED concentric glass tube reactor (CGTR) with micro-depthof 2 mm was designed for plug flow behaviour (length/effective diameter = 150). The reactor design considered uniform radial concentration and hydrodynamic cavitation. The 100% Acridine Orange dye (3.77×10-5 M) was removed within 35 min at the graphene oxide dose of 0.3 g/dm3 and initial pH 11. It was observed that hydrodynamic cavitation shortened the reaction time and enhanced the apparent reaction rate constant from 0.022 to 0.109 min-1. Further, the degradation pathway showed that decolourized dye solution consisted of ethylenedione (34%), indicating the oxidative reaction occurred.