Optimization of nimesulide oxidation via a UV-ABC/H2O2 treatment process: Degradation products, ecotoxicological effects, and their dependence on the water matrix

Silva, Débora Antônio da; Cavalcante, Rodrigo Pereira; Cunha, Rebeca Fabbro; Machulek, Amílcar; Oliveira, Sílvio C. de

doi:10.1016/j.chemosphere.2018.05.115

Cited by 34 publications

(5 citation statements)

References 70 publications

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“…As such, H2O2 can be combined with high energy irradiation sources such as UVC [5], UV-ABC [59], VUV [60] and UVAB [61]. Previous studies regarding H2O2 photolysis (UV/H2O2) using shortwavelength light source have reported high COD or TOC removal efficiency, with reports using longer wavelengths finding similar efficiencies to those reported in this work [53,56].…”

Section: H2o2 and H2o2/solar Irradiationsupporting

confidence: 78%

Evaluation of ozone-based oxidation and solar advanced oxidation treatment of greywater

Alrousan

Dunlop

2020

Journal of Environmental Chemical Engineering

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Section: H2o2 and H2o2/solar Irradiationsupporting

confidence: 78%

Evaluation of ozone-based oxidation and solar advanced oxidation treatment of greywater

Alrousan

Dunlop

2020

Journal of Environmental Chemical Engineering

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“…Additionally, it was maintained a negative control group with distilled water and measured the length of the three longest roots (To calculate their average length) of each onion. Thus, it was possible to compare the test with the negative control [18,19,20].…”

Section: Ecotoxicity Evaluation To Allium Cepamentioning

confidence: 99%

“…Then Root tips were hydrolyzed in HCl (1 mol L -1 ) under heating at 60º C for 10 min, followed by the addition of orcein (2%) and crushing against microscopy slides. The percentage mitotic index (%MI) for each bulb was calculated with a ratio of the number of dividing cells for 1,000 cells based on [18,19,20,21].…”

Section: Ecotoxicity Evaluation To Allium Cepamentioning

confidence: 99%

Combined Toxicity of Methylparaben and Propylparaben in Artemia salina and Allium cepa Applying Experimental Design

Nolasco,

Da Silva,

De Paula

et al. 2023

Orbital: Electron. J. Chem.

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Parabens are used as preservatives in sanitizers and cosmetic products causing environmental concern, because presented potential as endocrine disrupters. Among these compounds, the most used are methylparaben and propylparaben. Thus, a study was proposed to evaluate the interaction between different concentrations (mmol L-1) of the variables methylparaben [MP] and propylparaben [PP], against the acute toxicity of the microcrustacean Artemia salina (A. salina) and Allium cepa (A. cepa) applying the 22 factorial design with an added center point. Responses were used: percent A. salina mortality (% mortality), A. cepa root growth inhibition (% root inhibition) and mitotic index (%MI). For A. salina, after 72 hours of exposure with the combination of concentration ([MP] and [PP] = 0.8 mmol L−1) caused an 80% mortality. While, A. cepa a high cytotoxicity was observed with the mixture of Parabens, exhibiting 72.3% root growth inhibition at [MP] = 1.2 mmol L-1 with [PP] = 1.2 mmol L-1. In contrast, for response %MI at [MP] = 0.3 mmol L-1 with [PP] = 0.3 mmol L-1, 2.5 %MI with 36% inhibition. In this context, parabens demonstrated high toxicity for A. salina and cytotoxicity for A. cepa, based on the interaction with the effect of the concentrations.

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“…Direct photolysis reduced the sample TOC by 2.3% and 1.3%, with and without aeration, respectively, which was attributed to the low energy of UVA photons and/or low concentration of natural photosensitizers in the GW limiting reactive oxygen species (ROS) production [32]. Whilst direct photolysis may cause different structural and chemical changes to the organic compounds in water, no significant reduction in organic content is commonly reported [33,34]. This trend has been reported with a range of different water sources and specifically for GW, with Chin et al [33] reporting negligible COD reduction by direct photolysis using a photoreactor fitted with a higher intensity UV source (two 15 W UVC lamps).…”

Section: Control Experimentsmentioning

confidence: 99%

Organic Degradation Potential of Real Greywater Using TiO2-Based Advanced Oxidation Processes

Alrousan

Afkhami

Bani‐Melhem

et al. 2020

Water

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In keeping with the circular economy approach, reclaiming greywater (GW) is considered a sustainable approach to local reuse of wastewater and a viable option to reduce household demand for freshwater. This study investigated the mineralization of total organic carbon (TOC) in GW using TiO2-based advanced oxidation processes (AOPs) in a custom-built stirred tank reactor. The combinations of H2O2, O3, and immobilized TiO2 under either dark or UVA irradiation conditions were systematically evaluated—namely TiO2/dark, O3/dark (ozonation), H2O2/dark (peroxidation), TiO2/UVA (photocatalysis), O3/UVA (Ozone photolysis), H2O2/UVA (photo-peroxidation), O3/TiO2/dark (catalytic ozonation), O3/TiO2/UVA (photocatalytic ozonation), H2O2/TiO2/dark, H2O2/TiO2/UVA, H2O2/O3/dark (peroxonation), H2O2/O3/UVA (photo-peroxonation), H2O2/O3/TiO2/dark (catalytic peroxonation), and H2O2/O3/TiO2/UVA (photocatalytic peroxonation). It was found that combining different treatment methods with UVA irradiation dramatically enhanced the organic mineralization efficiency. The optimum TiO2 loading in this study was observed to be 0.96 mg/cm2 with the highest TOC removal (54%) achieved using photocatalytic peroxonation under optimal conditions (0.96 mg TiO2/cm2, 25 mg O3/min, and 0.7 H2O2/O3 molar ratio). In peroxonation and photo-peroxonation, the optimal H2O2/O3 molar ratio was identified to be a critical efficiency parameter maximizing the production of reactive radical species. Increasing ozone flow rate or H2O2 dosage was observed to cause an efficiency inhibition effect. This lab-based study demonstrates the potential for combined TiO2-AOP treatments to significantly reduce the organic fraction of real GW, offering potential for the development of low-cost systems permitting safe GW reuse.

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Optimization of nimesulide oxidation via a UV-ABC/H2O2 treatment process: Degradation products, ecotoxicological effects, and their dependence on the water matrix

Cited by 34 publications

References 70 publications

Evaluation of ozone-based oxidation and solar advanced oxidation treatment of greywater

Evaluation of ozone-based oxidation and solar advanced oxidation treatment of greywater

Combined Toxicity of Methylparaben and Propylparaben in Artemia salina and Allium cepa Applying Experimental Design

Organic Degradation Potential of Real Greywater Using TiO2-Based Advanced Oxidation Processes

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