Effect of inorganic ions on the photocatalytic treatment of agro-industrial wastewaters containing imazalil

Santiago, Dunia E.; Araña, J.; Díaz, O. González; Alemán‐Domínguez, María Elena; Acosta-Dacal, Andrea; Fernández-Rodríguez, C.; Pérez‐Peña, J.; Doña-Rodrı́guez, J.M.

doi:10.1016/j.apcatb.2014.03.022

Cited by 137 publications

(36 citation statements)

References 51 publications

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“…In addition to common anions, natural water sources often contain various cations such as magnesium ions (Mg 2+ ), calcium ions (Ca 2+ ), and aluminum ions (Al 3+ ) [37,38]. Hence, it is very important to study the effect of co-existing cations on the CBZ degradation, in order to match with the realistic treatment process.…”

Section: Effect Of Inorganic Cationsmentioning

confidence: 99%

Photocatalytic degradation of carbamazepine using hierarchical BiOCl microspheres: Some key operating parameters, degradation intermediates and reaction pathway

Gao

Zhang

Wang

et al. 2015

Chemical Engineering Journal

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Section: Effect Of Inorganic Cationsmentioning

confidence: 99%

Photocatalytic degradation of carbamazepine using hierarchical BiOCl microspheres: Some key operating parameters, degradation intermediates and reaction pathway

Gao

Zhang

Wang

et al. 2015

Chemical Engineering Journal

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“…The presence of sodium chloride in the aqueous solution had the most inhibiting effect on the photocatalytic activity of TiO 2 /MMT, thereby implying that chloride ions scavenged the photo-generated holes and the produced hydroxyl radicals [61,62]. Bicarbonate ions reacted with hydroxyl radicals and produced carbonate radicals [61].…”

Section: The Effect Of the Presence Of Radical Scavengersmentioning

confidence: 99%

Photocatalytic degradation of ciprofloxacin by synthesized TiO2 nanoparticles on montmorillonite: Effect of operation parameters and artificial neural network modeling

Hassani

Khataee

Karaca

2015

Journal of Molecular Catalysis A: Chemical

182

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“…Various processes and systems have been tested for the treatment of wastewaters produced by fruit-packaging plants (FPP) including adsorption onto activated carbon (8), photocatalytic degradation (9,10), and biological degradation (11,12). However, their high cost, their elevated technological requirements, and the frequent production of oxidized metabolites which are of unknown toxicity compared to the parent compound have hampered their full-scale implementation.…”

mentioning

confidence: 99%

Land Spreading of Wastewaters from the Fruit-Packaging Industry and Potential Effects on Soil Microbes: Effects of the Antioxidant Ethoxyquin and Its Metabolites on Ammonia Oxidizers

Papadopoulou

Tsachidou

Sułowicz

et al. 2016

Appl Environ Microbiol

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c Thiabendazole (TBZ), imazalil (IMZ), ortho-phenylphenol (OPP), diphenylamine (DPA), and ethoxyquin (EQ) are used in fruitpackaging plants (FPP) with the stipulation that wastewaters produced by their application would be depurated on site. However, no such treatment systems are currently in place, leading FPP to dispose of their effluents in agricultural land. We investigated the dissipation of those pesticides and their impact on soil microbes known to have a key role on ecosystem functioning. OPP and DPA showed limited persistence (50% dissipation time [DT 50 ], 0.6 and 1.3 days) compared to TBZ and IMZ (DT 50 , 47.0 and 150.8 days). EQ was rapidly transformed to the short-lived quinone imine (QI) (major metabolite) and the more persistent 2,4-dimethyl-6-ethoxyquinoline (EQNL) (minor metabolite). EQ and OPP exerted significant inhibition of potential nitrification, with the effect of the former being more persistent. This was not reflected in the abundance (determined by quantitative PCR [qPCR]) of the amoA gene of ammonia-oxidizing bacteria (AOB) and archaea (AOA). Considering the above discrepancy and the metabolic pattern of EQ, we further investigated the hypothesis that its metabolites and not only EQ were toxic to ammonia oxidizers. Potential nitrification, amoA gene abundance, and amoA gene transcripts of AOB and AOA showed that QI was probably responsible for the inhibition of nitrification. Our findings have serious ecological and practical implications for soil productivity and N conservation in agriculturally impacted ecosystems and stress the need to include metabolites and RNAbased methods when the soil microbial toxicity of pesticides is assessed. During postharvest handling, fruits are subjected to treatments with fungicides like thiabendazole (TBZ), imazalil (IMZ), and ortho-phenyl phenol (OPP) (1, 2) and antioxidants like diphenylamine (DPA) and ethoxyquin (EQ) (3), resulting in the production of large volumes of pesticide-contaminated wastewaters. The direct environmental discharge of those effluents without prior depuration entails a serious risk for the integrity of receiving ecosystems, considering the high aquatic toxicity of the pesticides (4, 5). This concern has been addressed by the European Commission (EC), and authorization for those pesticides was given with the stipulation "that an efficient treatment of the produced wastewaters should be operative at a local scale" (6, 7).Various processes and systems have been tested for the treatment of wastewaters produced by fruit-packaging plants (FPP) including adsorption onto activated carbon (8), photocatalytic degradation (9, 10), and biological degradation (11, 12). However, their high cost, their elevated technological requirements, and the frequent production of oxidized metabolites which are of unknown toxicity compared to the parent compound have hampered their full-scale implementation. Thus, to date effluents from FPP are either discharged in municipal wastewater treatment systems or they are disposed via land-spreading on the s...

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Effect of inorganic ions on the photocatalytic treatment of agro-industrial wastewaters containing imazalil

Cited by 137 publications

References 51 publications

Photocatalytic degradation of carbamazepine using hierarchical BiOCl microspheres: Some key operating parameters, degradation intermediates and reaction pathway

Photocatalytic degradation of carbamazepine using hierarchical BiOCl microspheres: Some key operating parameters, degradation intermediates and reaction pathway

Photocatalytic degradation of ciprofloxacin by synthesized TiO2 nanoparticles on montmorillonite: Effect of operation parameters and artificial neural network modeling

Land Spreading of Wastewaters from the Fruit-Packaging Industry and Potential Effects on Soil Microbes: Effects of the Antioxidant Ethoxyquin and Its Metabolites on Ammonia Oxidizers

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