Removing Heavy Metals From Waste Water
Content
Removal of Heavy Metals from Waste Water by using
Carbon Nano Tubes (CNT)
Keywords: Heavy Metals, Waste Water, carbon Nano Tubes
Heavy metals present in waste water such as (Lead, Magnesium, Nickel,
Zinc and Cadmium) can be harmful and problematic if present at large
quantities. It might lead to cancer and acute or chronic toxicity if the water
containing heavy metals was used in irrigation of soil and food crops, also
reducing the effectiveness of biosolids fertilizers which are organic materials rich
in nutrients that are derived from domestic sewage treatment.
Deferent techniques might be used in the removal of heavy metals from
waste water such as membrane separation, chemical precipitation in which the
dissolved metals are transformed into an insoluble solid that precipitates and
thus easily removed, ion exchange in which the heavy metals ions are
exchanged with another ion of the same charge present on the surface of a fixed
bed, and adsorption on a solid surface which in the case we are studying by
using carbon nanotubes.
The definition of the term nano in a numerical way means that a certain
unit is multiplied by 10 -9 .The word itself is derived from the ancient Latin
language word dwarf, which in turns indicates an extremely small quantity. And
according to the European union the term nanomaterials refers to ‘a natural or
synthesized material in which half or more of the particles in the number size
distribution, one or more external dimensions should range from 1 nm to 100
nm’.
The carbon nanotubes are defined as an allotropy or manner in which
carbon atoms are formed in a cylindrical shape resembling hollow tubes. The
diameter is nanometer sized while on the contrary the length is in centimeters
with a length/diameter ratio exceeding 107. The deferent nanotubes resemble
the shape of ropes that are held together by Vander wall attractive force.
The carbon nanotubes can be used in the removal of heavy metal from
waste water due to their adsorption capabilities for both aromatic and aliphatic
contaminants in water. And also for their ability to adsorb low molecular weight
and polar contaminants.
Finally this paper highlights the potential of using carbon nano tubes in the
removal of heavy metals from waste water. By using 250 mg of Multi-walled
carbon nano tubes (MWCNTs) at pH 7.0 and 298 0K in 0.01 M KNO3 and after
10 min of adsorption we measuring the amount of heavy metals in waste water
and then compare it with the initial amount of heavy metals in waste water. And
finally comparing it by the results obtained from adsorption of heavy metals from
waste water by using deferent adsorbents to evaluate its efficiency.
Carbon Nano Tubes (CNT)
Keywords: Heavy Metals, Waste Water, carbon Nano Tubes
Heavy metals present in waste water such as (Lead, Magnesium, Nickel,
Zinc and Cadmium) can be harmful and problematic if present at large
quantities. It might lead to cancer and acute or chronic toxicity if the water
containing heavy metals was used in irrigation of soil and food crops, also
reducing the effectiveness of biosolids fertilizers which are organic materials rich
in nutrients that are derived from domestic sewage treatment.
Deferent techniques might be used in the removal of heavy metals from
waste water such as membrane separation, chemical precipitation in which the
dissolved metals are transformed into an insoluble solid that precipitates and
thus easily removed, ion exchange in which the heavy metals ions are
exchanged with another ion of the same charge present on the surface of a fixed
bed, and adsorption on a solid surface which in the case we are studying by
using carbon nanotubes.
The definition of the term nano in a numerical way means that a certain
unit is multiplied by 10 -9 .The word itself is derived from the ancient Latin
language word dwarf, which in turns indicates an extremely small quantity. And
according to the European union the term nanomaterials refers to ‘a natural or
synthesized material in which half or more of the particles in the number size
distribution, one or more external dimensions should range from 1 nm to 100
nm’.
The carbon nanotubes are defined as an allotropy or manner in which
carbon atoms are formed in a cylindrical shape resembling hollow tubes. The
diameter is nanometer sized while on the contrary the length is in centimeters
with a length/diameter ratio exceeding 107. The deferent nanotubes resemble
the shape of ropes that are held together by Vander wall attractive force.
The carbon nanotubes can be used in the removal of heavy metal from
waste water due to their adsorption capabilities for both aromatic and aliphatic
contaminants in water. And also for their ability to adsorb low molecular weight
and polar contaminants.
Finally this paper highlights the potential of using carbon nano tubes in the
removal of heavy metals from waste water. By using 250 mg of Multi-walled
carbon nano tubes (MWCNTs) at pH 7.0 and 298 0K in 0.01 M KNO3 and after
10 min of adsorption we measuring the amount of heavy metals in waste water
and then compare it with the initial amount of heavy metals in waste water. And
finally comparing it by the results obtained from adsorption of heavy metals from
waste water by using deferent adsorbents to evaluate its efficiency.
