Transcript Green Electronics

GREEN ELECTRONICS
SAVE ENVIRONMENT ,IT WILL SAVE YOU!!!
WE ARE DOING OUR BIT WHAT ABOUT YOU???
TOWARDS GREEN ELECTRONICS
GETTING GREENER,
BUT NOT GREENER YET
GREEN ELECTRONICS
BASIC AIM :Green Electronics focuses on elimination
of harmful chemicals, elements and
components, and recycling of electronic products at the end
of life.
INTRODUCTION
• Electronics has made life easier for us.
• Certain materials in the electronic goods and products are toxic
and harmful to the nature and the humans especially.
• Green Electronics focuses on the elimination of these harmful
and toxic chemicals and elements from the products, and recycling the
electronic items at the end of their life.
• Among the harmful chemicals are ±± Lead, Cadmium, Mercury,
Polybrominated Diphenyls Ethers(PBDE).
• Many Parliaments of the the different Countries has passed the
legislation to restrict the use of Lead and other harmful matierials
for the manufacture of electronic products.
SUBSTITUTE FOR
LEAD???
90% of all Electronic goods and products are made up ofLEAD
.Efforts are being made to find feasibleand costeffective waysfor producing for producing lead-free products.
Many of these electronic components are highly toxic highly
toxic..
Toxic materials and emissions contaminate the air and water
resources.
Semiconductors are the basis of all the electronic
components and lead is the
glue that binds all the semiconductor devices to make them
work efficiently
Lead alloy solders help to transfer data from your computer.
Earlier, lead was even used in paints, ceramic glazes and
plumbing solders.
But now its been discarded due to its poisoning effects
FACT:One Billion pounds of lead are contained in obsolete
computers in the
US alone.
Why LEAD is used in Electronic
Components????
Points as to why LEAD is used in Electronic
Components and Device:
To Meet Performance Requirementin a cost
efficient manner. Lead can be easilyRemo
ulded Refined..
Lead hasHighest Recycling Rate of all the
industrial metals in the world.
Natural Properties:
1. Low Melting Point
2. High Strength
3. Ductility
4. Fatigue Resistance
5. HighThermal Cycling
6. Joint Integrity
7. Corrosion Resistant
8. Malleability
9. Long Life
• Lead is essential to the production of many
highly technical products, from
foetal monitors to fibre optics. It plays a vital
role in space exploration,
energy conservation and telecommunications
E-Toxic Components in Computers
The e-toxic components in computers include:
1. Computer circuit boards containing heavy metals like lead and cadmium.
2.Computer batteries containing cadmium.
3. Cathode ray tubes with lead oxide and barium.
4. Brominated flame -retardants used on PCBs, cables and plastic casing.
5. Polyvinyl chloride (PVC) coated copper cables and plastic computer
casings that release highly toxic dioxins and furans when burnt to recover valuable
metals.
6.Mercury switches.
7. Mercury in flat screens.
8. Polychlorinated biphenyls present in older capacitors andtransformers.
Disposal of E-Waste
E-waste can be disposed in 3 ways
1.Incineration
2.Landfilling
3.Recycling
INCINERATION
• Incineration basically entails to destroying the e-waste
including computers and other electronic devices and
components by burning.
• Incineration is particularly dangerous because of the variety
of different substances found together in electro scrap.
• The burning of these components results into high
concentrations of metals, including heavy metals, in the slag,
fly ash, flue gas and filter cake.
• 90% of cadmium results into fly ash and 70% of mercury
results into filter cake.
• Some of the electro scrap can also be sent to cement kilns for
use as an alternative to fuel.
LANDFILLING
Landfilling involves disposing the e-waste by burning it, especially as a
method of filling in and reclaiming excavated pits.
Major Disadvantage: Even the best µstate- of the art¶ landfills don¶t remain
completely tight throughout their lifetimes and a certain amount of
chemical and metal leaching does occur.Mercury leaches when certain electronic devices,
such as circuit breakers, are destroyed.The same is true for PCBs from condensers. When
brominated flame- -retarded plastic or cadmium- -containing plastics cadmium may leach
into the soil and
are landfilled, both PBDE and groundwater.
Even significant amount of lead ions are dissolved from broken lead
containing glass, such as the cone glass of cathode ray tubes, when mixed with acid waters.
RECYCLING
Of the three discussed, Recycling is by far the best method.
It simply removes the hazards into secondary products that eventually have to be
disposed of.
Unless he goal is to redesign the product to use non-hazardous
materials, such recycling is a false solution.
Hazardous emissions to the air also result from the recycling of e-waste containing
heavy metals, such as lead and cadmium.
Another problem with heavy metals and halogenated substances in untreated waste occurs
during the shredding process. Since most waste is shredded without proper disassembly,
hazardous substances, such as PCBs contained in capacitors into the recovered metals and the
shredder waste.
Consequences of usingLead
-Free Solders
Lead is said to have cause serious chronic damage.
From health point of view, it is a risk using lead in tin solders for human
exposure.
The humans are most prone to lead via the Environment.
• Survey criteria
In June 2010, Greenpeace asked 21 companies to submit the greenest
products that would be on the market by November 1,2010. Eighteen
companies submitted products.The leading manufacturers of desktop
computers,notebooks, netbooks, computer monitors, mobile
phones,smartphones as well as televisions were directly invited to
submit their greenest products via an assessment form that was
provided. In addition, the form was published on the Greenpeace
website and other forums to offer smaller manufacturers the
opportunity to participate. For the first time two major Indian
computer manufacturers have also
taken part in the survey. In another first for this survey,companies
were provided with a document detailing mostof the methodologies
used for the scoring. This was done not only to ensure that the
companies could select their highest performing products, but also to
increase the transparency of the process.