E-waste or electronic waste are the out of use electrical or electronic devices. Used electronics that are bound to be reused, resold, recycled, or to be disposed are also considered e-waste. Improper processing of e-waste can lead to environmental pollution and adverse health effects. Electronic waste includes washing machines, dryers, refrigerators, computers, television, mobile phones, etc. A great care must be taken while handling e-waste as land-filling or incinerating can lead to emission of toxic substances into the environment. Devices like Cathode Ray Tube (CRT) contains lead and phosphors that are necessary for display. But CRT is very difficult to recycle.
The development in technology causes older technology to be replaced. The newer technology is bought by the consumer and the consumer rejects the older products. These old products mostly land up as waste. This is one of the major reasons for a huge growth in e-waste. The generation of E-waste is on an estimated 5% to 10% global increase in each year.
Outdated electronic gadgets are quickly filling the landfills across the globe. In the United States itself, more than 100 million PCs are thrown off. Of these 100 million, less than 20% being reused. In the US alone, more than 100 million computers are thrown away with less than 20% being recycled properly of which 60 million metric tons enter landfills every year. Most gadgets that are carelessly discarded contain some type of destructive materials, for example, beryllium, cadmium, mercury and lead. These materials may be in trace, but when added to a huge volume, the risk to the earth is critical.
Electronic waste processing usually first involves dismantling the equipment into various parts (metal frames, power supplies, circuit boards, plastics), often by hand. In an automatic system, a hopper passes on material for shredding into a mechanical separator. with screening and crushing machines to isolate constituent metal and plastic parts, which are sold to smelters or plastics recyclers. Such reusing apparatus is encased and utilizes a tidy gathering framework. A portion of the discharges are gotten by scrubbers and screens. Magnets, eddy currents, and trommel screens are utilized to isolate glass, plastic, and ferrous and nonferrous metals.
Recycling raw materials from end-of-life gadgets is the best answer for the growing e-waste issue. Most electronic gadgets contain an various materials, including metals that can be recouped for future use. By dismantling and reusing the gadgets. Also, natural resources are conserved and air and water contamination caused by toxic wastes is avoided. Moreover, recycling decreases the amount of polluting substance discharged as in the case of manufacturing new products. Materials that can be reused incorporate ferrous and non-ferrous metals, glass, and different sorts of plastic. Non-ferrous metals, predominantly aluminum and copper would all be able to be re-smelted and re-manufactured. Ferrous metals, for example, steel and iron can be likewise be re-utilized.