لخّصلي

Nanomaterial-based water purification devices offer advantages over traditional methods due to their large surface area and avoidance of carcinogenic byproducts from chlorine or chloramine. Photocatalytic titania-coated nanomembranes, applicable via atomic layer deposition, degrade organic contaminants and destroy microorganisms upon UV irradiation, showing promise for developing countries. Nanostructured materials like magnetic nanoparticles, iron zeolite, and carbon nanotubes effectively remove toxic metal ions (Hg(II), Pb(II), etc.) causing severe health problems. Nanosized zero-valent ions act as adsorbents and catalyze photochemical oxidation of persistent contaminants. The high adsorption capacity of carbon nanotubes and dendrimers makes them valuable for advanced water purification systems.

In present era nanomaterial based devices are being used for water purification[8]. Nanomaterial
based devices have advantages over other methods because of larger surface area[9]. These
nanotechnology based chlorine free methods of water purification have advantage because chloramine
or chlorine used in chlorine method produce carcinogenic byproducts[10]. Nanomembranes coated
with photocatalytic titania are of great interest for water purification as titania has capability to
degrade organic contaminants as well as destroy microorganisms[11,12] when irradiated by UV light.
These nanomembranes can also be coated by antimicrobial and photocatalytic material by applying
atomic layer deposition method[13,14]. These nanomembranes may be useful for the development of
water purification systems in developing countries. Nanostructured materials like magnetic
nanoparticles, iron zeolite, carbon nanotubes can be engaged in water treatment for the removal of toxic metal ions like Hg(II), Pb(II), Cr(III), Cr(VI), Ni(II), Co(II), Cu(II), Cd(II), Ag(I), As(V) and
As(III)]. These metal ions cause severe health issues[15]. Nanosized zero valent ions are used as
adsorbents and also destruct persistent contaminants by catalyzing photochemical oxidation[16].
Because of extensive adsorption properties, carbon nanotubes and dendrimers are frequently being
used for the development of advanced water systems[