Environmental Engineering Reference
In-Depth Information
table 24.2
catalytic fenton and coupled systems
No.
Organic pollutants
method
Catalyst
Optimum reaction conditions
important findings
references
1.
rhodamine B (rB)
Photo-Fenton
magnetic NiFe
2
O
4
rhB 10 mg/l, 0.20 g NiFe
2
O
4
NiFe
2
O
4
exhibits photo-Fenton
catalytic activity in the presence
of oxalic acid
[72]
1.0 mm oxalic acid, pH 3.0
Catalyst is very stable, recoverable,
and easy to separate using an
external magnetic field
2.
Orange 4 (rO4)
Photo-Fenton
TiO
2
-P25 nanoparticles
Ferrous photo-Fenton: Fe
2+
0.1 mmol,
H
2
O
2
10 mmol, 100 mg catalyst, pH 3
increase of uv light intensity
increases the degradation rate
linearly
[85a]
Ferrioxalate photo-Fenton: Fe
3+
0.15 mmol, H
2
O
2
15 mmol, 200 mg
catalyst, pH 3
uv/ferrous/H
2
O
2
/TiO
2
and uv/
ferrioxalate/H
2
O
2
/TiO
2
processes
are found to be more efficient than
the individual photo-Fenton and
uv/TiO
2
-P25 processes
3.
Bisphenol A (BPA)
Sono-Fenton
Fe
3
O
4
magnetic
nanoparticles
40 kHz, 100 W, catalyst 585 mg/l, H
2
O
2
160 mmol/l, BPA 20 mg/l
The catalyst performed similar activity
within a wide pH range from 3 to 9
and showed good stability and
activity even after five recycles
[85b]
The degradation efficiencies were
remarkably enhanced by ultrasound
4.
2,4-dichloro phenol
(2,4-dCP)
Fenton-like
degradation
Fe
3
O
4
magnetic
nanoparticles
H
2
O
2
12 mm, catalyst 1.0 g/l, 2,4-dCP
100 mg/l, pH 3.0, 30°C
Catalysts that can remove 2,4-dCP
efficiently
[85c]
Two-stage first-order kinetics of
2,4-dCP degradation was observed
5.
reactive black 5 (rB5)
and orange ii
Heterogeneous
Fenton
Fe
3
O
4
-poly(3,4-
ethylenedioxythiophene)
(PedOT)
H
2
O
2
10 mm, 100 mg/l catalysts,
10 mm rB5 or orange ii
Compared with Fe
3
O
4
nanoparticles,
Fe
3
O
4
-PedOT core-shell
nanoparticles demonstrated
outstanding catalytic performance
[79]
6.
2-Chlorophenol (2-CP)
Photo-Fenton
Zero-valent iron (Zvi)
nanoparticles
2-CP 0.39 mm (50 ppm), pH 2.8
Fe
Tot
= 18 ppm
The reaction rate improved when the
pH was decreased
[85d]
The reaction conversion by applying
radiation
(
Continued
)
