Question

prepare a note on e-waste and disposal of pcbs and ics

Answer 1

Due to competitive technology and our information savvy society, even the latest technology is out of date within a few months of purchase. As a result, we are upgrading and changing out our electronic devices more often than ever before. It is estimated that 20 to 50 million metric tons of electronic devices are discarded each year.

E-waste is a dangerous material to dispose of improperly and irresponsibly due to toxic heavy metals such as mercury and lead and corrosive chemicals. These substances can cause serious damage when they are disposed of in the trash and subsequently end up in the landfill. When this happens, chemicals can seep (or leach) into surrounding groundwater causing serious harm to individuals, as well as the environment.

E-waste is also not acceptable in your traditional, Single Stream recycling. Lithium ion batteries which are located in many electronic devices can cause dangerous truck fires, while mercury-containing devices have the opportunity to break and cause a hazardous waste 'release'.

The safest and most responsible disposal for your e-waste is at a designated e-waste drop off location. To find these locations simply search "nearby e-waste drop off locations". You may also contact your local landfill, which may have designated e-waste collection days established for you to drop off your items for proper disposal. Smaller items like cellphones can also be recycled at e-waste drop off bins located within electronic stores like Best Buy.

Answer 2

The electrical and electronic devices that have been used and no longer usable are called electronic-waste or e-waste. Some examples are computers, cell-phones, TV, etc. turns into e-waste when they are no longer usable or have been replaced by the new generation versions.

PCB contains many different chemicals, metals like gold, silver and copper, and glass fibers. The recycling of these materials is important for waste reduction as well as recovering scarce materials. It is not seem to be proper for disposal of PCBs, as they produce a secondary pollution such as acidification of the soil and heavy metal leached into ground water from landfill and toxicant gases generates from incineration and material combustion.

There is a method to recover the valuable metals like gold, silver and copper present in the scrab ICs was developed to minimize the problem of pollution. Some methods like roasting, grinding, screening, etc. were adopted in order to know the efficiency of the recovery of gold, silver and copper.