“…Data on CAS effluent quality ( Fig. 2 ) was extracted from studies related to CAS systems operating worldwide ( Arzate et al, 2020 , Arzate et al, 2017 ; Costa et al, 2020 ; De la Obra Jiménez et al, 2019 ; Dimane and El Hammoudani, 2021 ; Freitas et al, 2017 ; Salaudeen et al, 2018 ; Soriano-Molina et al, 2021 , Soriano-Molina et al, 2019b , Soriano-Molina et al, 2019a ; Starling et al, 2021a ; Vilela et al, 2022 ). Fig.…”
Section: Quality Of Mse Originated From Cas and Anaerobic Systemsmentioning
confidence: 99%
“…2 A). As all secondary treatment systems generate effluents which present circumneutral pH, efforts to perform solar photo-Fenton as a post-treatment at neutral pH by using the intermittent iron addition strategy ( Carra et al, 2014 ; Freitas et al, 2017 ; Starling et al, 2021a ) or complexing agents ( Arzate et al, 2020 ; Costa et al, 2020 , Costa et al, 2021a ; Maniakova et al, 2020 ; Silva et al, 2021a ; Soriano-Molina et al, 2021 , Soriano-Molina et al, 2019a , Soriano-Molina et al, 2019b , Soriano-Molina et al, 2018 ) must be encouraged to increase treatment applicability.…”
Section: Quality Of Mse Originated From Cas and Anaerobic Systemsmentioning
confidence: 99%
“…Mechanisms of EDDS action as a chelating agent in photo-Fenton process are shown in Eqs. (6) , (7) , (8) , (9) , (10) , (11) and are related mainly to simultaneous effect of EDDS• 3− , H 2 O 2 , HO• and O 2 • − ( Soriano-Molina et al, 2019a , Soriano-Molina et al, 2018 ; Wu et al, 2014 ). The use and efficiency of Fe 3+ -EDDS in solar photo-Fenton for post-treatment of MSE is deeply discussed in Section 3 .…”
Section: Quality Of Mse Originated From Cas and Anaerobic Systemsmentioning
“…Data on CAS effluent quality ( Fig. 2 ) was extracted from studies related to CAS systems operating worldwide ( Arzate et al, 2020 , Arzate et al, 2017 ; Costa et al, 2020 ; De la Obra Jiménez et al, 2019 ; Dimane and El Hammoudani, 2021 ; Freitas et al, 2017 ; Salaudeen et al, 2018 ; Soriano-Molina et al, 2021 , Soriano-Molina et al, 2019b , Soriano-Molina et al, 2019a ; Starling et al, 2021a ; Vilela et al, 2022 ). Fig.…”
Section: Quality Of Mse Originated From Cas and Anaerobic Systemsmentioning
confidence: 99%
“…2 A). As all secondary treatment systems generate effluents which present circumneutral pH, efforts to perform solar photo-Fenton as a post-treatment at neutral pH by using the intermittent iron addition strategy ( Carra et al, 2014 ; Freitas et al, 2017 ; Starling et al, 2021a ) or complexing agents ( Arzate et al, 2020 ; Costa et al, 2020 , Costa et al, 2021a ; Maniakova et al, 2020 ; Silva et al, 2021a ; Soriano-Molina et al, 2021 , Soriano-Molina et al, 2019a , Soriano-Molina et al, 2019b , Soriano-Molina et al, 2018 ) must be encouraged to increase treatment applicability.…”
Section: Quality Of Mse Originated From Cas and Anaerobic Systemsmentioning
confidence: 99%
“…Mechanisms of EDDS action as a chelating agent in photo-Fenton process are shown in Eqs. (6) , (7) , (8) , (9) , (10) , (11) and are related mainly to simultaneous effect of EDDS• 3− , H 2 O 2 , HO• and O 2 • − ( Soriano-Molina et al, 2019a , Soriano-Molina et al, 2018 ; Wu et al, 2014 ). The use and efficiency of Fe 3+ -EDDS in solar photo-Fenton for post-treatment of MSE is deeply discussed in Section 3 .…”
Section: Quality Of Mse Originated From Cas and Anaerobic Systemsmentioning
“…The degradation of amoxicillin would form amoxilloic acid resulting from the hydroxylation of the aromatic ring and the opening of the four-membered β-lactam ring. Conventional Fenton processes require strict pH control at acidic ranges which might not be a suitable process for downstream wastewater effluent, since the pH of the effluent is usually neutral [117,118,120,121]. Inhibition of the Fenton process due to the solubility of the iron species can be circumvented with the use of ligands where a large number of recent studies focus on the use of ligands like EDDS to operate the reactors at a neutral pH.…”
The management of contaminants of emerging concern (CECs) in water bodies is particularly challenging due to the difficulty in detection and their recalcitrant degradation by conventional means. In this review, CECs are characterized to give insights into the potential degradation performance of similar compounds. A two-pronged approach was then proposed for the overall management of CECs. Light-driven oxidation processes, namely photo/Fenton, photocatalysis, photolysis, UV/Ozone were discussed. Advances to overcome current limitations in these light-driven processes were proposed, focusing on recent trends and innovations. Light-based detection methodology was also discussed for the management of CECs. Lastly, a cost–benefit analysis on various light-based processes was conducted to access the suitability for CECs degradation. It was found that the UV/Ozone process might not be suitable due to the complication with pH adjustments and limited light wavelength. It was found that EEO values were in this sequence: UV only > UV/combination > photocatalyst > UV/O3 > UV/Fenton > solar/Fenton. The solar/Fenton process has the least computed EEO < 5 kWh m−3 and great potential for further development. Newer innovations such as solar/catalyst can also be explored with potentially lower EEO values.
“…The synergistic effect of photocatalysis and the Fenton reaction could promote the charge transfer between Fe 3+ and Fe 2+ by utilizing photogenerated carriers and improve the degradation rate of organic pollutants [5][6][7][8][9][10][11][12][13]. Recently, iron-based photocatalysts, especially α-Fe2O3, have been extensively studied in the field of heterogeneous photo-Fenton catalysis.…”
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