Table 6.5 (continued)
Oxidants
Solution
pH
Initial
Concentration
(μg/L)
Type of
Water
Comments
References
Hypochlorite
7
500
Ground
water
Complete oxidation
of As (III) to As
(V) was occurred
with higher loading
of hypochlorite,
typically, 500μg/L
Viet et al.
(2003)
Hydrogen
peroxide
7.3–10.5 50
Sea
water
and
fresh
water
Highly efficient As
(III) oxidation
occurs when the
solution pH lever
was from 7.3 to 10.5
Pettine et al.
(1999)
Potassium
permanganate
8.12
50
Ground
water
Complete oxidation
occurs within a
minute, very quick
process.
Sorlini and
Gialdini
(2010)
Photocatalytic
oxidation
(UV/H2O2)
8
100
Ground
water
Hydrogen peroxide
with UV irradiation
works effectively to
oxidize As (III) to
As (V). oxidation
can be expanded by
increasing the
power of UV irradiation. Typically,
85% of oxidation
was occurred by
applying UV portion of 2000 mJ/cm
2
Sorlini et al.
(2014)
Biological
oxidation
N/A
N/A
N/A
Chemoautotrophic
arsenite-oxidizing
microscopic organisms can include in
the process of As
(III) oxidation by
means of the oxygen as electron
acceptors through
the absorption process with inorganic
carbon materials
into cell
Katsoyiannis
and
Zouboulis
(2004)
In situ oxidation N/A
N/A
Ground
water
oxygenated or extra
oxygen loaded
water is siphoned
with the contaminated water to
decrease the concentration of As less
than 10μg/L
Gupta et al.
(2009)
6 Metal Oxides for Removal of Arsenic Contaminants from Water
159
Oxidants
Solution
pH
Initial
Concentration
(μg/L)
Type of
Water
Comments
References
Hypochlorite
7
500
Ground
water
Complete oxidation
of As (III) to As
(V) was occurred
with higher loading
of hypochlorite,
typically, 500μg/L
Viet et al.
(2003)
Hydrogen
peroxide
7.3–10.5 50
Sea
water
and
fresh
water
Highly efficient As
(III) oxidation
occurs when the
solution pH lever
was from 7.3 to 10.5
Pettine et al.
(1999)
Potassium
permanganate
8.12
50
Ground
water
Complete oxidation
occurs within a
minute, very quick
process.
Sorlini and
Gialdini
(2010)
Photocatalytic
oxidation
(UV/H2O2)
8
100
Ground
water
Hydrogen peroxide
with UV irradiation
works effectively to
oxidize As (III) to
As (V). oxidation
can be expanded by
increasing the
power of UV irradiation. Typically,
85% of oxidation
was occurred by
applying UV portion of 2000 mJ/cm
2
Sorlini et al.
(2014)
Biological
oxidation
N/A
N/A
N/A
Chemoautotrophic
arsenite-oxidizing
microscopic organisms can include in
the process of As
(III) oxidation by
means of the oxygen as electron
acceptors through
the absorption process with inorganic
carbon materials
into cell
Katsoyiannis
and
Zouboulis
(2004)
In situ oxidation N/A
N/A
Ground
water
oxygenated or extra
oxygen loaded
water is siphoned
with the contaminated water to
decrease the concentration of As less
than 10μg/L
Gupta et al.
(2009)
6 Metal Oxides for Removal of Arsenic Contaminants from Water
159