Fe3+- IDS as a new green catalyst for water treatment by photo-Fenton process at neutral pH

Sustainable-by-Design Approach of Active Catalysts to Produce Reactive Oxygen Species in Water Matrices

“…For this reason, inspired by the 12 principles of Green Chemistry and the benign-by-design approach [32,33], the design of biodegradable (10th principle) and biomass-derived (7th principle) ligands of the new generation has to be pursued by the scientific community. To date, through following this approach, two alternative chelating agents of new generation have been employed as ligands in designing novel catalysts for (photo) Fenton-like processes, namely the ethylenediamine disuccinate and iminodisuccinate iron complexes, Fe-EDDS [34][35][36][37] and Fe-IDS [38][39][40], respectively. Both ligands can be obtained from maleic anhydride, a biomass-derived platform molecule (in accordance with 7th principle).…”

Solar photo-oxidation of recalcitrant industrial wastewater: a review

“…Initially, contaminated wastewater has been shown to lose its toxicity after being treated with the photo-Fenton process before total mineralization. Toxicity is frequently followed by an increase in the biodegradability of treated wastewater (Fiorentino et al 2021;Sanabria et al 2021;Silva et al 2021).…”

Addressing main challenges in the tertiary treatment of urban wastewater: are homogeneous photodriven AOPs the answer?

“…141 Interestingly, UV-C/H 2 O 2 /Cu-IDS was more effective than the Table 3 Kinetic constant (k), R-squared (R 2 ), and the half-life time (t 1/2 ) for phenol (50 mg L −1 , 0.53 mM) removal (as COD) by photo-Fenton and UV/H 2 O 2 : sunlight vs. UV-C, neutral (chelating agent) vs. acidic pH (data taken from, 141 Environmental Science: Water Research & Technology Critical review other investigated processes (UV-C/H 2 O 2 /Cu, UV-C/H 2 O 2 /Fe, and UV-C) in the inactivation of E. coli (complete inactivation (3.5 log units) in 10 min) at natural pH (7.8 ± 0.5) in real wastewater, 21 while the sunlight/Fe-IDS/H 2 O 2 process was found to be more effective than the UV-C-driven and pH 3 photo-Fenton processes in the degradation of phenol from aqueous solutions (Table 3). 141 The higher efficiency of the photo-Fenton process under sunlight can be explained by the improved catalytic effect of the complex under longer wavelengths as they are able to overcome the inner filter effect. 142 However, while for the other complexing agents, different works are available in the scientific literature, including the effect on CECs removal and comparisons among different chelating agents, such results are not yet available for IDS.…”

“…The higher performance of UV-C/H 2 O 2 compared to the sunlight/H 2 O 2 process was confirmed from the data in Table 2: 50 mg L −1 (0.53 mM) of phenol (measured as COD) was oxidized faster by UV-C/H 2 O 2 (k = −0.0010 1/min; t 1/2 = 172 min) rather than sunlight/H 2 O 2 (k = −0.0005 1/min; t 1/2 = 200 min). 141 Despite such a limitation, the sunlight/H 2 O 2 process has been successfully investigated as a disinfection process (internal photo Fenton mechanism) 124 and, to some extent, for the removal of CECs from water and wastewater. 118,120,121 The effect of the light source was also investigated in the photolysis of PAA as a tertiary treatment method of urban wastewater by evaluating its efficiency in terms of the inactivation of AR E. coli and degradation of CECs.…”

“…21) and Fe 3+ . 141 Interestingly, UV-C/H 2 O 2 /Cu-IDS was more effective than the other investigated processes (UV-C/H 2 O 2 /Cu, UV-C/H 2 O 2 /Fe, and UV-C) in the inactivation of E. coli (complete inactivation (3.5 log units) in 10 min) at natural pH (7.8 ± 0.5) in real wastewater, 21 while the sunlight/Fe-IDS/H 2 O 2 process was found to be more effective than the UV-C-driven and pH 3 photo-Fenton processes in the degradation of phenol from aqueous solutions (Table 3). 141…”