Combining TiO2-photocatalysis and wetland reactors for the efficient treatment of pesticides

Araña, J.; Cabo, C. Garriga i; Fernández-Rodríguez, C.; Melián, J.A. Herrera; Méndez, J.A. Ortega; Doña-Rodrı́guez, J.M.; Peña, J. Pérez

doi:10.1016/j.chemosphere.2007.10.008

Cited by 69 publications

(59 citation statements)

References 30 publications

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“…In most studies phenol has been used as a molecule probe for photocatalytic tests due to the fact that its degradation mechanism is well established [1,[15][16][17][18]. Several authors have been able to correlate the photocatalytic degradation of phenol with the phase composition of the catalysts tested, indicating that the photocatalytic efficiency increases gradually with the content of anatase and its crystallinity [1,19].…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have shown that achieving high photocatalytic efficiency with this catalyst requires the consideration of many parameters such as crystal phases, particle size, surface area, particle morphology, distribution of hydroxyl groups, etc. [1][2][3][4][5][6][7]. Many researchers consider that the presence of anatase phase is a necessary condition for the process to be effective.…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic degradation of phenolic compounds with new TiO2 catalysts

Araña

Doña-Rodrı́guez

Portillo-Carrizo

et al. 2010

Applied Catalysis B: Environmental

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of phenolic compounds with new TiO2 catalysts

Araña

Doña-Rodrı́guez

Portillo-Carrizo

et al. 2010

Applied Catalysis B: Environmental

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“…Phenol (P) and 3,5-dichlorophenol (3,5-DCP) were the target pollutants used to test the catalyst photoactivity in aqueous solution. In most studies P has been used as a molecule probe for photocatalytic tests, due to the fact that its degradation mechanism is well established [24][25][26][27]. The choice of 3,5-DCP as additional model molecule lies in the fact that: (a) it is a common and representative species of the class of chlorophenols in waters, (b) it is highly soluble in water relative to other polychlorinated phenols and (c) its simple molecular structure facilitates a greater understanding of the reaction mechanism involving aromatic compounds; moreover, additionally following of the chlorine atoms fate permits to ensure 3,5-DCP degradation.…”

Section: Introductionmentioning

confidence: 99%

Investigations of photocatalytic activities of photosensitive semiconductors dispersed into epoxy matrix

Calza¹,

Rigo²,

Sangermano³

2011

Applied Catalysis B: Environmental

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New hybrid catalyst coating have been synthesised encapsulating TiO 2 nanoparticles into an epoxy matrix by means of UV-induced polymerization. It was shown that the presence of the titania nanoparticles did not significantly influenced the curing process. Morphological analysis of the achieved UV cured coatings containing titania showed an homogeneous distribution of the inorganic particles, with an average size between 130-160 nm. It is mandatory that the coating will not be itself degraded during UV irradiation. FT-IR measures performed on aged coatings subjected to UV irradiation for 41 days showed that the photodegradation of either the pristine epoxy coating or coating containing the photocatalyst were negligible.The photocatalytic efficiency of these new catalysts was evaluated by studying the degradation of some organic compounds under UV light. Methylene blue was employed as model molecule to investigate the photoactivity toward organic molecule directly adsorbed on the coating surface. Under irradiation, complete dye degradation was achieved within 90 min.Phenol and 3,5-dichlorophenol were used as target molecules for studying photoactivity toward organic compounds dissolved in aqueous solution. Also in these cases, complete degradation of the organic compounds was achieved.

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“…Studies have been published on the effectiveness of advanced oxidation techniques, specifically heterogeneous TiO 2 -based photocatalysis and the Fenton processes for the degradation of pesticides and fungicides in water [4][5][6]. These processes, although making use of different reacting systems, are all characterised by the same chemical feature: production of •OH radicals [7].…”

Section: Introductionmentioning

confidence: 99%

“…The use of Fenton and photo-Fenton processes in the treatment of pesticide-containing wastewater has also been studied: the degradation of triazine herbicides [14], methyl-parathion [15], fenuron [16], the fungicides pyrimethanil and triadimenol [17], and commercial mixtures of pesticides [6,18] are known examples.…”

Section: Introductionmentioning

confidence: 99%

Degradation and Detoxification of Banana Postharvest Treatment Water Using Advanced Oxidation Techniques

Santiago¹,

Melián²,

Rodríguez³

et al. 2011

GSC

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The elimination and detoxification of water contaminated with the principal commercial fungicides-thiabendazole (Textar 60 T) and imazalil sulphate (Fruitgard IS 7.5)-used in the postharvest treatment of bananas was successfully achieved through the use of advanced oxidation processes (AOPs). The techniques tested were heterogeneous photocatalysis with TiO 2 and TiO 2 -activated carbon (TiO 2 -CA) and Fenton and photo-Fenton processes. The evolution of fungicide concentration during degradation was studied together with mineralization and toxicity levels. When treated with any of the methods under study, the water meets the conditions stipulated by the legislation currently in force for its reuse in irrigation. However, this study proposes that the Fenton process is the best option for treatment of this type of water due to the efficiency of its reactions and its low economic cost.

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Combining TiO2-photocatalysis and wetland reactors for the efficient treatment of pesticides

Cited by 69 publications

References 30 publications

Photocatalytic degradation of phenolic compounds with new TiO2 catalysts

Photocatalytic degradation of phenolic compounds with new TiO2 catalysts

Investigations of photocatalytic activities of photosensitive semiconductors dispersed into epoxy matrix

Degradation and Detoxification of Banana Postharvest Treatment Water Using Advanced Oxidation Techniques

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