Table 5: Application of Fenton-like processes for the degradation of EDCs in aqueous media.

AOP Operating Conditions Target EDCs Work Highlights Reference
Dark/Photo-Fenton H2O2: 50 mg/L, Fe2+ 5 mg/L and absence of light;
H2O2: 10-50 mg/L, Fe2+ 0-5 mg/L UV-C/solar light.
Mix of 25 pharmaceuticals, 2 corrosion inhibitors and 5 pesticides at real concentration in wastewaters
(COD: 0-150 mg/L)
DOM presence enhanced Fe(III) photo-Fenton yields;
UV-C degradation efficiency higher than sunlight one.
[76]
Photo-Fenton 9 W UV lamp
Ferrous sulfate and H2O2 at appropriate concentrations
Perfluorooctanoic acid
(20 mmol/L)
Rapid degradation within 1 h (87.9% removal);
Afterwards, H2O2 was consumed and reactions mainly occurred due to Fe3+ ions.
[80]
Fenton H2O2/ Fe (III): 10;
pH. 3;
Various Fe concentrations
17²-estradiol, 17α -ethinylestradiol Removal efficiencies of 95% and
98% at ferric concentration of 58.6 mg/L were obtained.
[81]
Fenton H2O2/Fe(II) molar ratio:7;
Fe(II):0.05 (ph=2) - 0.06 (pH=3.0) mol/L
Phthalic acid esters and bisphenol A
(0.08-1.5 mg/L)
Removal efficiencies up to 88%- increased performances for higher EDC concentrations. [82]
Photo-Fenton H2O2: 20-50 mg/L;
Fe3+: 0-4 mg/L
UV-C (70 W/m2)
Mix of 22 EDCs, including pharmaceuticals, corrosion inhibitors and pesticides When Fe (III) was added, almost
no dissolved fraction could be measured, so homogeneous
photo-Fenton was probably not occurring.
[83]
Fenton Different molar ratio H2O2/Fe(II)
pH: 3
PPCPs
(each present as 1 mg/L)
20 mg/L Fe(II) allowed complete removal of all PCPPs, except atrazine and iopromide. [84]
Photo-Fenton Different Fe and H2O2 concentrations;
UV-C: 254 nm, UV-A: 350 nm, vis: 420 nm.
BPA
(50 mg/L)
Complete degradation after 2-3 min treatment, despite irradiation source.
Toxicity disappearance along with BPA removal.
[85]
Fenton Fe2+/H2O2 molar ratio: 0.012 to 0.100;
pH: 3
BPA
(13- 300 mg/L)
Complete BPA degradation and significant DOC and TOC conversion. [86]
Photo-Fenton H2O2: 5 mg/L;
Fe(II): 50 mg/L;
Solar light
Mix of 15 EDCs, including pharmaceuticals, corrosion inhibitors and pesticides (100 mg/L) Significant degradation within 4-5 hours. [4]
Photo-Fenton H2O2: 5 mg/L;
Fe(II): 50 mg/L;
pH: 3, 7.6-8.3
Mix of 62 EDC present in real wastewater
(3 ng/L to 66.379 ng/L)
Complexing agents have to be used to keep the iron in solution.
EDDS is a suitable agent.
[87]
US/Photo-Fenton US: 400 kHz, 0.3 W/mL;
UV: 254 nm;
Fe2+: 0.1 mM
Di-n-butyl phthalate
(0.01 mM)
Complete degradation of the target compound in 75 min.
More efficient use of Fe2+ in comparison to conventional Fenton
[88]