Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 156, Issue -, Pages 284-292Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2014.03.022
Keywords
Wastewater; Photocatalysis; Imazalil; Banana postharvest; Ions
Funding
- Banana Producers Association (Spain)
- MINECO (Ministry of Economy and Competitiveness, Government of Spain)
- NANOBAC [IPT-2011-1113-310000]
- Universidad de Las Palmas de Gran Canaria
- [2010-3E-UNLP10-3E-MINECO-726]
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In this work we studied the elimination, mineralization and detoxification of wastewaters from banana postharvest industries, contaminated with the fungicide imazalil, by means of heterogeneous advanced oxidation processes. We compared the activity of the commercial photocatalyst Evonik P25 and the lab-made EST-1023t in the degradation of imazalil in deionized water and in industrial wastewater. Results show an important negative water-matrix effect for wastewater treatment at acidic pH values due, mainly, to the presence of ions adsorbed onto the TiO2 photocatalyst surface. At pH 7 only bicarbonate anions and bacteria hindered the degradation and mineralization of imazalil. Mineralization of imazalil was completely inhibited by dissolved aluminium in concentrations as low as 5 mg L-1. (C) 2014 Elsevier B.V. All rights reserved.
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