Theory:

What are e-wastes?
Electronic wastes, often known as e-waste, are spoiled, outdated, and non-repairable electrical and electronic gadgets.
These wastes contain toxic metals such as lead, cadmium, chromium, barium, and mercuryE-wastes also contain metals such as iron, copper, silicon, aluminium, and gold, which are recoverable. They also contain carcinogens such as carbon black and heavy metals. Despite this, barely \(5 \%\) of all e-waste produced are recycled.
Sources of e-waste:
1. Electronic gadgets:
 
Computers, laptops, cellphones, printers, monitors, televisions, DVD players, calculators, toys, and sports equipment belong to this category.
 
ComputerOldTechnologyEWasteGarbageScrap2049019.jpg
Electronic gadgets
 
2. Household electrical appliances:
 
Refrigerators, washing machines, microwave ovens, mixers, grinders, water heaters are examples of e-waste generated from the household.
 
trashed-microwave-oven.jpg
Old and damaged microwave oven
 
3. Accessories:

Printing cartridges, batteries, and chargers are examples of accessories.
 
2457508491_332a9c7144_o.jpg
Used batteries
 
E-wastes include:
 
Computer components\(66 \%\)
Telecommunication components\(12 \%\)
Electronic components\(5 \%\)
Biomedical components\(7 \%\)
Other components\(6 \%\)
Environmental impact of e-wastes
Any type of electrical or electronic item that is disposed of without awareness can end up in a landfill or pollute water.
 
Electronic equipment contains a variety of hazardous heavy metals, such as lead and cadmium, which can cause soil and groundwater pollution. E-waste dumping yards and the areas around them are contaminated and pose a serious health hazard.
Health effects of e-wastes
The health effects of various substances are displayed in a tabular column:
 
Compound
Effect
LeadDamages central and peripheral nervous system; affect brain development in children
ChromiumCauses asthmatic bronchitis
CadmiumAccumulates in the kidneys and liver; causes neural damage
Mercury
Chronic damage to the brain and respiratory system
Plastics including Polyvinyl Chloride
(PVC)
Burning PVC produces dioxin, which can cause developmental and reproductive problems. It also damages the immune system.
Reference:
https://www.publicdomainpictures.net/en/view-image.php?image=367106&picture=trashed-microwave-oven
https://www.flickr.com/photos/johnseb/2457508491