Individual and combined effects of ultrasound, ozone and UV irradiation: a case study with textile dyes

Tezcanli‐Güyer, Gökce; Ince, Nilsun H.

doi:10.1016/j.ultras.2004.01.096

Cited by 214 publications

(120 citation statements)

References 15 publications

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“…It is possible that oxidation plays a similar role in both ozonolysis and sonolysis pathways, and some free-radical pathways present during ozonation, are similar to those of sonolysis (Schramm & Hua, 2001). The observed synergy was attributed to enhanced ozone diffusion (promotes more rapid electrophilic and radical reaction rates) and enhanced hydroxyl radical formation of some intermediate products of oxidation (Tezcanli & Ince, 2004). The US/O 3 combination produced a myriad of tiny air bubbles by the cavitation effect of ultrasound, allowing most ozone to enter the liquid phase or react on the gas or liquid interface.…”

Section: Reduction Of Standard Chlorpyrifos Solution By Ultrasonic Anmentioning

confidence: 99%

Oxidative Degradation and Detoxification of Chlorpyrifos by Ultrasonic and Ozone Treatments

Pengphol¹,

Uthaibutra²,

Arquero³

et al. 2012

JAS

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Chlorpyrifos is an organophosphate pesticide, widely used on fruit and vegetable crops. Here, we report on the oxidative degradation of standard chlorpyrifos by individual and combined effects of ultrasonic irradiation (US) and ozone (O 3 ). A standard chlorpyrifos solution (1 mg L -1 ) was treated with 1 MHz US, O 3 and its combination (US/O 3 ) for 0, 10, 20, 30, 40, 50 and 60 min. Reduction of residual chlorpyrifos was determined by gas chromatography with flame photometric detection (GC-FPD) while ion chromatography (IC) was used to determine the concentration of anions as major degradation products. US/O 3 combined treatment had a synergistic effect in reducing chlorpyrifos concentrations, with the highest rate of degradation occurring within the first 10 min. Moreover, chloride, nitrate and sulphate anion concentrations obtained from chlorpyrifos treated with US/O 3 combination, were significantly higher, compared to those treated with ultrasonic irradiation or ozone alone. A sharp decrease in pH from 7.46 to 4.49 was also observed for the combined treatment. The degradation pathway of chlopyrifos, after treatment, was confirmed by gas chromatography mass spectrometry (GC-MS). All treatments resulted in similar main fragment ions at m/z 351, 314, 286, 258, 197 and 97. The lethal concentration (LC 50 ), over a series (0-100) mg L -1 of standard chlorpyrifos solutions, was estimated and compared to the treated chlorpyrifos. All the treatments directly detoxified chlorpyrifos with LC 50 values against brine shrimps (Artemia salina L.) of 10.21, 103.54 and 234.09 mg L -1 for US, O 3 and US/O 3 treated chlorpyrifos solutions, respectively. The brine shrimp test showed highest toxicity in standard chlorpyrifos with an LC 50 value of 7.22 mg L -1 .

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Section: Reduction Of Standard Chlorpyrifos Solution By Ultrasonic Anmentioning

confidence: 99%

Oxidative Degradation and Detoxification of Chlorpyrifos by Ultrasonic and Ozone Treatments

Pengphol¹,

Uthaibutra²,

Arquero³

et al. 2012

JAS

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“…Likewise, two mono azo dyes, acid orange 7 and acid orange 8 were sonochemically degraded from their tautomeric forms in solution at 300 kHz [28]. Ultrasonic energy has been coupled with biodegradation [29][30][31][32][33], catalytic degradation [34], and with other processes [35][36][37][38][39] for dye cleavage.…”

Section: Introductionmentioning

confidence: 99%

Rapid Ultrasound Assisted Reduction of Azo Dyes for Screening Banned Aromatic Amines

Dewani¹,

Avenue²,

Ahmed³

et al. 2018

Studia UBB Chemia

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“…At collapse, chemical reactivity is initiated through thermolytic decomposition of bubble contents into free radical species, and/or through free radical oxidation of dissolved solutes at the gas-liquid interface or the bulk liquid [24][25]. The chain of reactions occurring during sonication of pure water is as the following [23]:…”

Section: Introductionmentioning

confidence: 99%

“…Ultrasonic irradiation has shown promise for the purification of contaminated water (or textile effluents) and involves at least in significant part standard hydroxyl radical mediated chain oxidation processes [25,26].…”

Section: Introductionmentioning

confidence: 99%

“…Versatility of ultrasonic irradiation should make it adaptable for the removal of problematic contaminants in aqueous phase. Despite the tremendous interest in the ultrasonic irradiation induced degradation of pollutants, much of the fundamental understanding and characterization of these complex processes are still at the preliminary stages [24][25][26]29].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Kinetic Study on Photocatalytic and Sonophotocatalytic Degradation of Textile Dyes

Yetim

Tekin

2016

Period. Polytech. Chem. Eng.

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Individual and combined effects of ultrasound, ozone and UV irradiation: a case study with textile dyes

Cited by 214 publications

References 15 publications

Oxidative Degradation and Detoxification of Chlorpyrifos by Ultrasonic and Ozone Treatments

Oxidative Degradation and Detoxification of Chlorpyrifos by Ultrasonic and Ozone Treatments

Rapid Ultrasound Assisted Reduction of Azo Dyes for Screening Banned Aromatic Amines

A Kinetic Study on Photocatalytic and Sonophotocatalytic Degradation of Textile Dyes

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