Green Chemistry and Nanotechnology

  Green Chemistry and Nanotechnology

Chemistry place an important role to improve the quality of our life unfortunately due to this achievement our health and global environment under threat . Also , due to increase in human population and the industrial revolution ,  energy crisis and environmental pollution are highlighted major global problems in the 21st century . To minimize the problem of energy crisis and pollution , we have to adapted green chemistry .
Green chemistry is an approach to chemistry that aims to maximize efficiency and minimize hazardous effects on human health and environment .
This concept was coined by the green chemistry by Paul T . Anastas .

Definition of green chemistry is the use of chemistry for pollution prevention by environmental conscious design of chemical production and process is that reduce our any minute the use of generation of hazardous substance .

Green Chemistry is to reduce the impact of energy crisis , pollution and to save natural resources , we need to implement 12 principles of green chemistry enunciation wherever possible .

1st - Prevention of waste of by products

To give the priority for the prevention of waste rather than cleaning up and treating waste after it has been created .

2nd - Atom economy

Atom economy is a major of the amount of atoms from the starting material that are present in the useful products at the end of chemical process .
Good atom economy means most of the reactants are incorporated in the desired products and only small amounts of unwanted by products are formed and hence problems of waste disposal .

3rd - Less hazardous chemical synthesis

Design chemical reactions and synthesis routes should be as safe as possible.
So that we can avoid formation of hazardous waste from the chemical process .

4 - Designing safer chemicals

Designing safer chemicals is quite familiar to the let's hazardous chemical synthesis . To develop products that  is not toxic materials.

What is nano science ?
Nano science is the study of phenomena and manipulation of materials at atomic morni pila and macro molecules cares wear properties differ significantly from those at a large scale .

Nanotechnology is defined as. :- Nanotechnology is the design , characteration , production and application of structures device and system by controlling shape and size at nanometre scale .

Ant is 5 mm small .
Dust mite is 200 micrometre small . Human hair is 10 to 15 wide small.
Red blood cells are 2 - 5 micrometre  wide .
DNA is 2 to 12 nm diameters.
Carbon nanotubes 2 nm diameter .

Household plastics

Polyethelene terephthalate
used in microwave bell food trace salad dressing soft drink water and beer bottles .
It status is hard to clean absorb bacteria and slippers , avoid re using .
It is recycle to make carpet , furniture new containers , polar fleece .

High density poly-ethylene

It is used in household cleaner and shampoo bottle .
Status is true transit no no never call into the food and after recycle it this recycle to make detergent bottles fencing flower tiles and pens .

PVC
It is used in cooking oil bottles clear food packaging mouthwash bottles .
Status is to make container let's that interfere with formula development avoid it and it makes spelling road .