1.Summarization of nanotech apply in environmental protection

Nanotechnology has the potential to substantially benefit environmental quality and sustainability, through pollution prevention, treatment and remediation. Such benefits include improved detection and sensing, removal of the finest contaminants from air, water and soil, and the creation of new industrial processes which reduce waste products and are themselves “green”. Nanotechnology can be of benefit to environmental protection in areas such as reducing use of raw and manufactured materials (dematerialisation), minimising or eliminating the generation of wastes and effluents and reducing toxics. The environment is also protected in applications which treat waste streams more effectively and remediate existing polluted sites.

2. Nano-materials which commonly used in environmental protection

Nano-materials	Functions
CdSe-CdS	Environmental sensors, Environmental monitoring
Carbon nanotubes
ZnO
TiO2
ZnSO4
ITO
Ga2O3
SiO2
Gold
Silver
Y2O3
Fe3O4
MgO	Chlorocarbon and organophosphonate remediation
CaO
TiO2
Al2O3
Ca10(PO4)6(OH)2	As a radionuclide sorbent
Zirconium Phosphate
CeO2	Oxygen storage material; As automobile exhaust three-way catalysts