Solar photo-ozonation: A novel treatment method for the degradation of water pollutants

Chávez, Ana M.; Rey, Ana; Beltrán, Fernando J.; Álvarez, Pedro M.

doi:10.1016/j.jhazmat.2016.05.050

Cited by 50 publications

(19 citation statements)

References 22 publications

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“…Whilst ozone itself has been widely used in water and wastewater treatment, for remediation of color, taste, odor and disinfection [24], it is not recommended as a standalone process for organic content reduction [25]. Enhancing O3 efficiency and suitability through combination with solar irradiation (solar ozonation) [26][27][28], hydrogen peroxide (peroxonation) [29,30] or with both hydrogen peroxide and solar irradiation (solar peroxonation) [28] offers promise for remediation of domestic [26,29] and industrial wastewaters [30,31] and landfill leachate [28,32].…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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

Alrousan

Dunlop

2020

Journal of Environmental Chemical Engineering

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“…The high oxidation capacity of OH (10 8 -10 10 M -1 s -1 ) produced by AOPs in situ applications leads to treating a wide range of ECs with their low selectivity providing complete mineralization to CO2, H2O, and inorganic ions or acids [25]. Therefore, DEET degradation has been investigated by using several AOPs including mostly ozonation [26]; ozone and biologically activated carbon system [27,28]; photo-ozonation [29,30]; photocatalysis [31]; photocatalysis with TiO2 [3]; Fenton-like reaction [32] and finally electrochemical oxidation [33]. But there have not been enough studies on the ultrasonic oxidation of DEET in the literature so far.…”

Section: Introductionmentioning

confidence: 99%

The oxidation study of N,N-diethyl-meta-toluamide in dual frequency ultrasonic reactor

Eren

Ο'Shea

2020

Environmental Research and Technology

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With the increasing concern of emerging contaminants (ECs), advanced oxidation processes (AOPs) have been widely investigated to fulfill the drinking water quality because of the potential adverse health effects of ECs. Accordingly, N,Ndiethyl-meta-toluamide (DEET) is selected as a model compound belonging ECs to monitor its ultrasonic oxidation which is one of the most popular AOPs in a dual frequency ultrasonic reactor (DFUR) using low-frequency probe (20 KHz) and high-frequency transducer (640 KHz) type sources. DFUR was calorimetrically optimized in terms of power densities of both ultrasonic sources in order to provide the highest sonochemical yield with efficient energy output. Pseudo-first order kinetic equation was applied to results by measuring the concentration decreasing during the oxidation reactions. The pseudo-first-order rate constants, k, increased from 7.8x10-3 min-1 (640 kHz, R 2 =0.930) to 13.5x10-3 min-1 (DFUR, R 2 =0.990), by contrast, the rate constant was only 0.7x10-3 min-1 (R 2 =0.281) for 20 kHz lowfrequency ultrasonic source. DEET oxidation was evaluated with the presence of different gas saturation (Ar, Air, O2, and N2); addition of hydrogen peroxide (PO), persulfate (PS) and monoperoxysulfate (MPS) and PO concentration effect

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“…Tetrachlorobiphenyl and pentachlorobiphenyl is less soluble in water than TCB so these PCBs have tendency to be found in sediments. Therefore, the contamination of TCB and related PCBs in water is of great concern due to its toxicity to aquatic life [12,13,14].…”

Section: Introductionmentioning

confidence: 99%

Ozone oxidation of wastewater containing trichlorobiphenyl and used transformer oil

Abbasi

Bhatti

Mahmood

et al. 2020

Heliyon

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Trichlorobiphenyl (TCB) is a persistent toxic organic compound and exerts more hydrophilicity than other polychlorinated biphenyl (PCB) compounds. PCBs have been used on large scale in transformer oil. To observe the strong ozone oxidation effect on the degradation of TCB in aqueous medium, synthetic wastewater was prepared from transformer oil with TCB. Microbubbles ozonation of TCB was done in order to completely oxidize it. A batch treatment system was used for 60 min in glass column with a diffuser at the bottom to convert ozone gas into microbubbles. GCMS analyzed TCB and other toxic compounds before and after the treatment. TCB was reduced to below detection limit during the first 20 min of ozonation. Ethylbenzene and 1-chloroheptacosine were identified after 10 and 20 min, the concentrations of these compounds increased to 1.45 and 3.9 mg/L after 60 min. Alkane with chlorine containing compounds were identified more than any other compounds. The alkanes compounds with chlorine, such as tetradecane 1-chloro, hexadecane 1-chloro, heptadecane 1-chloro, octadecane 1-chloro and nonadecane 1-chloro were found during 60 min of ozonation. Chemical oxygen demand (COD) in the wastewater reduced from 700 to 390 mg/L. Small increase in pH was observed from 7.7 to 8.3. In this study it was concluded that TCB and other pollutants in transformer oil were degraded with ozone dose, 0.05 g/min L in the shortest period of 60 min.

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Solar photo-ozonation: A novel treatment method for the degradation of water pollutants

Cited by 50 publications

References 22 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

The oxidation study of N,N-diethyl-meta-toluamide in dual frequency ultrasonic reactor

Ozone oxidation of wastewater containing trichlorobiphenyl and used transformer oil

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