Environmental Engineering Reference
In-Depth Information
No.
Organic pollutants
Catalyst
Optimum reaction conditions
important findings
references
1.
Parathion (P)
Nanometer rutile TiO
2
50 mg/l P, 0.05 g TiO
2
, 40 kHz, 50 W
The degradation rate was enhanced in the presence of TiO
2
[112a]
Pseudo-first-order reaction kinetics
2.
Basic blue 41 (BB41)
Nanosized TiO
2
15 mg/l BB41, 0.01 g TiO
2
, 35 kHz,
160 W
H
2
O
2
accelerated the reaction
[100]
Pseudo-first-order reaction kinetics
3.
Acid red B (ArB)
TiO
2
10 mg/l ArB, 0.01 g catalyst, 40 kHz,
50 W
Sonocatalytic activity of TiO
2
/ZnO (4:1) was the highest
[109]
ZnO
TiO
2
/ZnO
Pseudo-first-order reaction kinetics
4.
methyl parathion (mP)
microsized rutile TiO
2
50 mg/l mP, 0.06 g TiO
2
, 40 kHz, 50 W
TiO
2
and H
2
O
2
increased the degradation rate
[112b]
Nanosized anatase TiO
2
Pseudo-first-order reaction kinetics
5.
methyl orange (mO)
Nanometer anatase and
rutile TiO
2
10-20 mg/l mO, 500-750 mg/l TiO
2
,
40-60 kHz, 50 W, 40°C, 100-120 min
Sonocatalytic activity of nanometer anatase TiO
2
powder
is obviously better than that of nanometer rutile TiO
2
powder
[102]
Pseudo-first-order reaction kinetics
6.
Acid red B (ArB)
Nanometer anatase and
rutile TiO
2
1.5 g/l TiO
2
, 10 mg/l ArB, 30 W, pH 3.0,
30°C
The sonocatalytic performance of nanometer anatase TiO
2
is obviously better than that of the nanometer rutile
TiO
2
powder
[105]
7.
rhodamine B (rB)
Fe-doped TiO
2
nanotubes
2 g/l of catalyst, rB 50 mg/l, 35 kHz
and 50 W
The optimum Fe doping at Fe:Ti = 0.005 showed the
highest sonocatalytic activity and exceeded that of
undoped TiO
2
nanotubes
[108]
leached Fe
3+
could catalyze Fenton-like reaction
Fe-doped TiO
2
nanotubes could retain high degradation
efficiency even after being reused for four cycles
8.
rhodamine B (rB)
TiO
2
nanotube (TiO
2
NTs)
20-100 W, 35 and 130 kHz, 8 mm H
2
O
2
,
1 l/min of air flow, neutral pH, 50 mg/l
rB, 120 min, 2 g/l TiO
2
NTs.
High sonocatalytic activity of TiO
2
NTs was achieved due
to their high specific surface area and unique pore
system
[107]
Pseudo-first-order reaction kinetics
9.
Black 5 (rB5)
Nanosized TiO
2
rB5 100 mg/l, nanocatalyst 0.05 g,
20 kHz, 41 W, 10 min, pH 6.5. 38°C.
Nanocomposite of TiO
2
/CdS exhibited a high
sonocatalytic activity in comparison with pure
nanosized TiO
2
and CdS
[112c]
Nanosized CdS
Complete mineralization of the organic compound into
SO
4
2−
and NO
3
−
ions
CdS/TiO
2
core-shell
nanocomposite
10.
methylene blue (mB)
C-Cr codoping in TiO
2
nanoparticles
(C-Cr-TiO
2
)
mB 10 mg/l, 100 mg, C-Cr-TiO
2
,
pH 7.0, 40 kHz, 80 W
The C-Cr-TiO
2
sonocatalysts show a higher sonocatalytic
activity than that of undoped TiO
2
samples
[112d]
When the amount of C or Cr dopant is less than 1 wt.%,
the sonocatalytic activity is increased, while more than
this amount decreases the sonocatalytic activity
(
Continued
)
