Effective photodegradation of 2,4-dichlorophenoxyacetic acid on TiO2 nanocrystals anchored on SBA-15 mesoporous material

Silva, R. T.; Lima, Aline Estefany Brandão; Costa, Maria Joseíta dos Santos; Ferreira, M. V. R.; Santos, Reginaldo da Silva; Caldeira, Vinícius Patrício da Silva; Santos, Anne Gabriella Dias; Martins, Francielle Alline; Luz, Geraldo E.

doi:10.1007/s13762-022-03934-1

Cited by 9 publications

(2 citation statements)

References 83 publications

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“…The electrical energy consumed by the SC and SPC processes constitutes a significant part of the operating cost. EEO is a figure of merit defined by [73] as the amount of energy (kWh m -3 ) required to degrade 90% of a target pollutant in 1 m 3 of water.…”

Section: Energy Consumption and Cost Analysis Of The Sc And Spc Proce...mentioning

confidence: 99%

Comparison Performances of Hybrid Sonocatalysis and Sonophotocatalysis on the Elimination of 2,4-Dichlorophenoxyacetic Acid in Water: Mineralization and Economic Analysis

Dikmen¹,

Okçu²,

Yalçuk³

2022

Pol. J. Environ. Stud.

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This study compares the removal performances of sonocatalysis (SC) coupled with commercially available titanium dioxide (TiO 2 , P25) and combined sonophotocatalysis (SPC) with H 2 O 2 of 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide in aqueous media in batch experiments. A SC process (US/TiO 2 ) with 75 mg/L 2,4-D obtained 65.58 ±0.42% degradation, 7.84 ±1.3% mineralization, and 15.86 ±0.39% oxidation at a pH of 2, and a temperature of 35±1ºC under optimum conditions after 360 minutes, whereas 82.24±2.91% degradation, 44.50 ±0.11% mineralization, and 55.11±0.35% oxidation were obtained after 360 minutes with SPC (US/UVA/TiO 2 -H 2 O 2 ), with the addition of an optimum 250 mg/L of H 2 O 2 . The synergistic index was calculated as 1.77 that indicated the positive effect of the combined system on degradation efficiency when compared with the individual processes. Total costs were obtained as 5072 USD/kg for SC and 4135 USD/kg for SPC, showing the cost efficiency of the hybrid SPC process in comparison to the SC process. The obtained results confirmed that the hybrid SPC process was more effective than the SC process in degrading and mineralizing 2,4-D for removal. Operation time was shorter, energy consumption was lower, and operation cost was lower when compared to the SC process.

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Section: Energy Consumption and Cost Analysis Of The Sc And Spc Proce...mentioning

confidence: 99%

Comparison Performances of Hybrid Sonocatalysis and Sonophotocatalysis on the Elimination of 2,4-Dichlorophenoxyacetic Acid in Water: Mineralization and Economic Analysis

Dikmen¹,

Okçu²,

Yalçuk³

2022

Pol. J. Environ. Stud.

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“…Several substrates including synthetic polymers [29][30][31][32], polymer composites [33][34][35][36][37], wood [38], ceramics and silica [39,40], natural light-weight stones [41][42][43], and concrete [44] have been used to support photocatalysts. Testing in a laboratory revealed that FPWT efectively removes a variety of organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

Greener Method for the Application of TiO2 Nanoparticles to Remove Herbicide in Water

Hiep

Anh

Dao

et al. 2023

Journal of Analytical Methods in Chemistry

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TiO2 nanoparticles have emerged as a great photocatalyst to degrade organic contaminants in water; however, the nanoparticles dispersed in water could be difficult to be recovered and potentially become contaminant. Herbicide like 2,4-dichlorophenoxyacetic acid (2,4-D) used in agriculture usually ends up with a large fraction remaining in water and sediment, which may cause potential risk to human health and the ecosystem. This study proposes a greener method to utilize TiO2 as photocatalyst to remove 2,4-D from water. Accordingly, TiO2 nanoparticles (10–45 nm) were synthesized and grafted on lightweight fired clay to generate a TiO2-based floating photocatalyst. Experimental testing revealed that 60.2% of 2,4-D (0.1 mM) can be decomposed in 250 min under UV light with TiO2-grafted lightweight fired clay floating on water. Degradation fits well into the pseudo-first-order kinetic model. The floating photocatalysts can degrade approximately 50% 2,4-D in 250 min under sunlight and the degradation efficiency is stable for cycles. The results revealed that the fabrication of floating photocatalyst could be a promising and greener way to remove herbicide contaminants in water using TiO2.

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Enhanced photocatalytic degradation of phenazopyridine using rutile TiO2/clay composite: catalyst recovery and environmental implications

Kharouf,

Zyoud,

Zyoud

et al. 2024

Int. J. Environ. Sci. Technol.

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Effective photodegradation of 2,4-dichlorophenoxyacetic acid on TiO2 nanocrystals anchored on SBA-15 mesoporous material

Cited by 9 publications

References 83 publications

Comparison Performances of Hybrid Sonocatalysis and Sonophotocatalysis on the Elimination of 2,4-Dichlorophenoxyacetic Acid in Water: Mineralization and Economic Analysis

Comparison Performances of Hybrid Sonocatalysis and Sonophotocatalysis on the Elimination of 2,4-Dichlorophenoxyacetic Acid in Water: Mineralization and Economic Analysis

Greener Method for the Application of TiO2 Nanoparticles to Remove Herbicide in Water

Enhanced photocatalytic degradation of phenazopyridine using rutile TiO2/clay composite: catalyst recovery and environmental implications

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