Application of metal ferrite for wastewater treatment

1. Photocatalytic Degradation Potential of
Graphene Oxide Based ZnFe2O4 Magnetic
Nanocomposites Under UV, Solar And LED Light
Photocatalytic Degradation Potential of Graphene Oxide Based ZnFe2O4
Magnetic Nanocomposites Under UV, Solar And LED Light
Nimra Nadeem (Chemistry Department)
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2. TEXTILE MEDIATED WATER POLLUTION
Dyes have striking visibility in
recipients; hence influence
photosynthetic activity of aquatic
lives…
They are persistent to microbial
degradation and their accumulation
in certain forms of aquatic life may
lead to toxic products.
Textile industries generate 100-170
lit dye effluent per kg of cloth
processed which could be
characterized by strong colour due
to presence of dye.
Textile industry of Faisalabad constitutes more than 65% of the textile export market of Pakistan. But this increasing
commercialization has taken a toll on its environment. Over a million tons of industrial effluent is generated annually.
Industrial Growth Results in Water Pollution:
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3. ADVANCED OXIDATION PROCESSES
Photo catalysis
Homogeneous Photocatalysis Limitation
Recombination of electron-hole pairs
Toxicity enhances when increase the
surface area.
Narrow light absorbance range.
Separation of material during water treatment.
Heterogeneous Photocatalysis
Adsorption enhance photocatalysis
. In present study ZnFe2O4 & GO-ZnFe2O4
catalyst have been prepare to study the
adsorption enhanced heterogeneous
photocatalytic degradation of synzol red
reactive dye
AOPs are promising methods for the remediation of wastewaters containing recalcitrant organic
compounds.
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5. Graphene In Photocatalysis
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6. PREPARATION OF ZnFe2O4 & GO-ZnFe2O4
Synthesis of graphene oxide by top down
approach, using graphite as a precursor,
Hummer’s Method((Hummer et al., 1958).
 Modified Hummer’s Method
 Pressurized oxidation Method (Chenlu et al.,
2012).
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7. DEGRADATION MECHANISM
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8. 0 10 20 30 40 50 60 70 80
50
100
150
200
250
300
(a)
intensity
(a.u)
2 Theta (degree)
0 10 20 30 40 50 60 70 80
50
100
150
200
250
300
(b)
intensity
(a.u)
2 Theta (degree)
0 10 20 30 40 50 60 70
0
50
100
150
200
250
300
(c)
intensity
(a.u)
2 Theta (degree)
0 10 20 30 40 50 60 70
0
50
100
150
200
250
(d)
intensity
(a.u)
2 Theta (degree)
XRD analysis of (a) graphite, (b) graphene oxide, (c) ZnFe2O4
(d) GO-ZnFe2O4
FTIR spectra of (a) ZnFe2O4 (b) GO-ZnFe2O4
CHARACTERIZATION OF ZnFe2O4 & GO-ZnFe2O4
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9. WASTEWATER TREATMENT: PROCESS PARAMETERS
1 2 3 4 5 6 7 8 9 10
0
10
20
30
40
50
60
70
80
90
degradation
(%)
pH
ZnFe2
O4
GO-ZnFe2
O4
0 2 4 6 8 10 12 14 16 18
30
40
50
60
70
80
90
ZnFe2
O4
GO-ZnFe2
O4
degradation
(%)
Catalyst dose (mg/mL)
10 20 30 40 50 60
40
50
60
70
80
90
100
ZnFe2
O4
GO-ZnFe2
O4
degradation
(%)
oxidant dose (mM)
20 40 60 80 100 120
30
40
50
60
70
80
90
100
ZnFe2
O4
GO-ZnFe2
O4
degradation
(%)
Time (min.)
0 10 20 30 40 50 60 70 80
50
55
60
65
70
75
80
85
90
95
ZnFe2
O4
GO-ZnFe2
O4
degradation
(%)
dye concentration (ppm)
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10. White LED Sun light UV irradiation
0
20
40
60
80
100
Degradation
(%)
variou light sources
GO-Zn ferrite
white LED Sunlight UV liight
0
20
40
60
80
degradation
(%)
light sources
Zn ferrite
(a) (b)
Effect of various light sources on % degradation of dye by Zinc Ferrite and GO-Zn ferrite
EFFECT OF VARIOUS LIGHT SOURCES
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11. 1st 2nd 3rd 4th 5th 6th
0
20
40
60
80
100
degradation
(%)
Reuseability
ZnFe2
O4
GO-ZnFe2
O4
REUSABILITY OF CATALYSTS
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12. Thank You All
Save Planet by Conserving
water
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