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Photocatalytic Degradation of Myclobutanil and Its Commercial Formulation with TiO2 P25 in Slurry and TiO2/β-SiC Foams

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Viticulture is one of the crops most subject to pest control by fungicides. Their drainage towards the fresh water affects the aquatic environment, the fauna, the flora and especially the human health. It is therefore necessary to find an adequate solution to solve this problem. Heterogeneous photocatalysis is an advanced oxidation method for the degradation and mineralization of organic pollutants in water and air using semi-conductor (e.g., TiO2). TiO2 P25 in suspension (0.75 g·L−1) is used to treat Myclobutanil contaminated water and a commercial formulation Systhane™ 20EW, a fungicide produced by BASF. After 120 min of batch treatment under our conditions (pH = 6.7, Co = 10 mg ·L−1), 96% and 98% of Myclobutanil and Systhane were removed with 94% and 92% mineralization, respectively. In order to avoid the recovery of nanoparticles of TiO2 P25 after treatment, we have taken care of β-SiC foam cells. Under the same experimental conditions, 45% and 56% of Myclobutanil and Systhane degraded after 4 h with mineralization of 29% and 27%, respectively in recirculation in a fixed-light photoreactor by UV-A lamps. These results are very encouraging: filtering is not necessary to separate the catalyst from the treated water, it is very important for large-scale use of this process.

Keywords: Fungicide; Myclobutanil; Photocatalysis; Systhane; TiO2/β-SiC

Document Type: Research Article

Affiliations: 1: Institut de Chimie et Procédés Pour l’Energie, l’Environnement et la Santé (ICPEES), CNRS-UMR7515 Université de Strasbourg, Antenne de Saint-Avold, Université de Lorraine, 12 rue Victor Demange 57500 Saint-Avold, France 2: Institut de Chimie et Procédés Pour l’Energie, l’Environnement et la Santé (ICPEES), CNRS-UMR7515 Université de Strasbourg, Antenne de Saint-Avold, Université de Lorraine, 12 rue Victor Demange 57500 Saint-Avold, France 3: Institut National de la Recherche Scientifique (INRS–Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec City, Québec, G1K 9A9, Canada 4: Laboratoire de Chimie Physique, UFR Sciences des Structures de la Matière et de la Technologie (SSMT), Université Félix Houphouët Boigny d’Abidjan, 22 BP 582 Abidjan 22, Côte d’Ivoire

Publication date: September 1, 2020

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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