These are consider to be fast, efficient and very effective in the removal of
contaminants from the wastewater and after the treatment of the water these nanoadsorbents are easily removed by the use of the magnets because of their magnetic
properties (Peyravi et al. 2014) (Fig. 12.7).
12.6 Nano-adsorption
Generally adsorption is the process which is considered as the surface event because
of which all the pollutants present on the surface get adsorbed. The adsorption
process depends on two forces, physical force and the chemical bond force (Faust
and Aly 1998). This nano-adsorption is used for the removal of both organic and
inorganic pollutants from the wastewater by the use of various nano-adsorbents.
These nano-adsorbents have many unique properties such as small size, high
reactivity, large surface area, easy to separate and have number of active sites with
which different contaminants interact (Barakat 2011). The basic type of the nanoadsorbents used for the removal of the contaminants from the waste water are
(Sharma et al. 2009)
• Carbon-based nano-adsorbents.
• Metal-based (>99.5% purity) nano-adsorbents.
• Polymeric nano-adsorbents.
• Magnetic or nonmagnetic oxide composite, and.
• Zeolites.
12.6.1 Carbon-based Nano-adsorbents
The basic example of such nano-adsorbents is carbon nanotubes (CNTs). They are
cylindrical in shape and sometimes is used in the place of the activated carbon. It has
Zero Valent Metal
Nanoparticles
Metal Oxides
Nanoparticles
Carbon Nanotubes
Nanocomposites
Silver Nanoparticles
Iron Nanoparticles
Zinc Nanoparticles
TiO2 Nanoparticals
ZnO Nanoparticles
Iron Oxide
Nanoparticles
Multi Walled
Carbon Nanotubes
Single Walled
Carbon Nanotubes
Nanomaterials
Fig. 12.7 Types of nanomaterials used for water treatment
12 Management of Waste Using Nanotechnology
269
contaminants from the wastewater and after the treatment of the water these nanoadsorbents are easily removed by the use of the magnets because of their magnetic
properties (Peyravi et al. 2014) (Fig. 12.7).
12.6 Nano-adsorption
Generally adsorption is the process which is considered as the surface event because
of which all the pollutants present on the surface get adsorbed. The adsorption
process depends on two forces, physical force and the chemical bond force (Faust
and Aly 1998). This nano-adsorption is used for the removal of both organic and
inorganic pollutants from the wastewater by the use of various nano-adsorbents.
These nano-adsorbents have many unique properties such as small size, high
reactivity, large surface area, easy to separate and have number of active sites with
which different contaminants interact (Barakat 2011). The basic type of the nanoadsorbents used for the removal of the contaminants from the waste water are
(Sharma et al. 2009)
• Carbon-based nano-adsorbents.
• Metal-based (>99.5% purity) nano-adsorbents.
• Polymeric nano-adsorbents.
• Magnetic or nonmagnetic oxide composite, and.
• Zeolites.
12.6.1 Carbon-based Nano-adsorbents
The basic example of such nano-adsorbents is carbon nanotubes (CNTs). They are
cylindrical in shape and sometimes is used in the place of the activated carbon. It has
Zero Valent Metal
Nanoparticles
Metal Oxides
Nanoparticles
Carbon Nanotubes
Nanocomposites
Silver Nanoparticles
Iron Nanoparticles
Zinc Nanoparticles
TiO2 Nanoparticals
ZnO Nanoparticles
Iron Oxide
Nanoparticles
Multi Walled
Carbon Nanotubes
Single Walled
Carbon Nanotubes
Nanomaterials
Fig. 12.7 Types of nanomaterials used for water treatment
12 Management of Waste Using Nanotechnology
269