Degradation and monitoring of acetamiprid, thiabendazole and their transformation products in an agro-food industry effluent during solar photo-Fenton treatment in a raceway pond reactor

Carra, Irene; Sirtori, Carla; Ponce-Robles, L.; Pérez, J.A. Sánchez; Malato, Sixto; Agüera, Ana

doi:10.1016/j.chemosphere.2015.03.001

Cited by 55 publications

(18 citation statements)

References 26 publications

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“…However, this particular effect from a medical perspective makes these compounds more persistent in the environment, with high potential for toxicity and bioaccumulation in aquatic and terrestrial biota (Fent et al 2006). Moreover, AOPs do not always achieve total mineralization of pollutants and can generate more toxic intermediates Carra et al 2015). Since the toxicity is based on a biological response, different organisms from various taxonomic levels should be used to improve the reliability of results.…”

Section: Responsible Editor: Markus Heckermentioning

confidence: 99%

Ecotoxicity evaluation of a WWTP effluent treated by solar photo-Fenton at neutral pH in a raceway pond reactor

Freitas

Rivas

Campos-Mañas

et al. 2016

Environ Sci Pollut Res

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Some pollutants can be resistant to wastewater treatment, hence becoming a risk to aquatic and terrestrial biota even at the very low concentrations (ng L-μg L) they are commonly found at. Tertiary treatments are used for micropollutant removal but little is known about the ecotoxicity of the treated effluent. In this study, a municipal secondary effluent was treated by a solar photo-Fenton reactor at initial neutral pH in a raceway pond reactor, and ecotoxicity was evaluated before and after micropollutant removal. Thirty-nine micropollutants were identified in the secondary effluent, mainly pharmaceuticals, with a total concentration of ≈80 μg L. After treatment, 99 % microcontaminant degradation was reached. As for ecotoxicity reduction, the assayed organisms showed the following sensitivity levels: Tetrahymena thermophila > Daphnia magna > Lactuca sativa > Spirodela polyrhiza ≈ Vibrio fischeri. The initial effluent showed an inhibitory effect of 40 % for T. thermophila and 20 % for D. magna. After 20 min of photo-Fenton treatment, no toxic effect was observed for T. thermophila and toxicity dropped to 5 % for D. magna. Graphical abstract Ecotoxicity removal by solar photo-Fenton at neutral pH. ᅟ.

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Section: Responsible Editor: Markus Heckermentioning

confidence: 99%

Ecotoxicity evaluation of a WWTP effluent treated by solar photo-Fenton at neutral pH in a raceway pond reactor

Freitas

Rivas

Campos-Mañas

et al. 2016

Environ Sci Pollut Res

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“…This system showed high removal efficiency for TBZ (EC 2001) but its high cost halted its wider implementation in fruit-packaging plants in the Mediterranean region. More recent bench-scale studies showed that photo-Fenton treatment (Carra et al 2015) and TiO 2 solar photocatalysis (Jimenez et al 2015) could effectively remove TBZ from effluents. However these tests were performed at concentration levels (lg L -1 ) which are multi-fold lower than the levels found in the effluents and there is concern about the numerous oxidized metabolites produced whose toxicity is unknown.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the biodegradation, bioremediation and detoxification capacity of a bacterial consortium able to degrade the fungicide thiabendazole

et al. 2017

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Thiabendazole (TBZ) is a persistent fungicide used in the post-harvest treatment of fruits. Its application results in the production of contaminated effluents which should be treated before their environmental discharge. In the absence of efficient treatment methods in place, biological systems based on microbial inocula with specialized degrading capacities against TBZ could be a feasible treatment approach. Only recently the first bacterial consortium able to rapidly transform TBZ was isolated. This study aimed to characterize its biodegradation, bioremediation and detoxification potential. The capacity of the consortium to mineralize 14 C-benzyl-ring labelled TBZ was initially assessed. Subsequent tests evaluated its degradation capacity under various conditions (range of pH, temperatures and TBZ concentration levels) and relevant practical scenarios (simultaneous presence of other postharvest compounds) and its bioaugmentation potential in soils contaminated with increasing TBZ levels. Finally cytotoxicity assays explored its detoxification potential. The consortium effectively mineralized the benzoyl ring of the benzimidazole moiety of TBZ and degraded spillage level concentrations of the fungicide in aqueous cultures (750 mg L -1 ) and in soil (500 mg kg -1). It maintained its high degradation capacity in a wide range of pH (4.5-7.5) and temperatures (15-37°C) and in the presence of other pesticides (ortho-phenylphenol and diphenylamine). Toxicity assays using the human liver cancer cell line HepG2 showed a progressive decrease in cytotoxicity, concomitantly with the biodegradation of TBZ, pointing to a detoxification process. Overall, the bacterial consortium showed high potential for future implementation in bioremediation and biodepuration applications.

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“…At the higher initial concentration of the pollutants, the slow rate of photo‐Fenton reaction results in more residuals. Moreover, when the concentration is high, the pollutants may hinder the penetration of solar light resulting in reduced photodegradation of organics 27 . The second‐order terms ( B 2 , C 2 , D 2 and E 2 ) in all three model equations indicate the quadratic influence of pH, H 2 O 2 dosage, Fe 2+ dosage and solar irradiation time on photocatalytic efficiency.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, when the concentration is high, the pollutants may hinder the penetration of solar light resulting in reduced photodegradation of organics. 27 The second-order terms (B 2 , C 2 , D 2 and E 2 ) in all three model equations indicate the quadratic influence of pH, H 2 O 2 dosage, Fe 2+ dosage and solar irradiation time on photocatalytic efficiency. The dome-shaped curvature of TOC and COD removal and the inverse curvature of Residual Fe 2þ (Figure 4) validate the quadratic influence of input factors.…”

Section: Rsm Models In Terms Of Coded and Actual Factorsmentioning

confidence: 96%

Artificial intelligence‐based multiobjective optimization of reverse osmosis desalination pretreatment using a hybrid ZnO‐immobilized/photo‐Fenton process

Joy

Shaik

Dutta

2022

Journal of Chemometrics

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The performance of desalination plants predominantly depends on the enhancement of membrane productivity through the effective removal of organic foulants from saline water prior to the membrane process. This research evaluates the performance of the ZnO-immobilized solar nanophotocatalytic process integrated with Fe 2+ /H 2 O 2 system for the removal of organics from reverse osmosis (RO) feed seawater. Machine-learning and response surface methodology (RSM) models were used for optimizing the performance of such a hybrid system in terms of five input factors: initial TOC (mg/L), pH, H 2 O 2 dosage (g/L), Fe 2+ dosage (mg/L) and solar irradiation time (minutes). Both machine-learning and RSM regression models were optimized using nondominated sorting genetic algorithm (NSGA-III) for estimating optimum organic degradation performance in terms of residual Fe 2+ , total organic carbon (TOC) removal and chemical oxygen demand (COD) removal. The response values obtained from the experimental run conducted at the optimum settings of ANN-NSGA-III was found to be TOC removal = 81.4%, COD removal = 77.4% and residual Fe 2+ = 1.95 mg/L. The pilot-scale solar nanophotocatalytic reactor optimized in the present research is worthy of being upscaled for wide application in desalination plants.

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Degradation and monitoring of acetamiprid, thiabendazole and their transformation products in an agro-food industry effluent during solar photo-Fenton treatment in a raceway pond reactor

Cited by 55 publications

References 26 publications

Ecotoxicity evaluation of a WWTP effluent treated by solar photo-Fenton at neutral pH in a raceway pond reactor

Ecotoxicity evaluation of a WWTP effluent treated by solar photo-Fenton at neutral pH in a raceway pond reactor

Characterization of the biodegradation, bioremediation and detoxification capacity of a bacterial consortium able to degrade the fungicide thiabendazole

Artificial intelligence‐based multiobjective optimization of reverse osmosis desalination pretreatment using a hybrid ZnO‐immobilized/photo‐Fenton process

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