Author – Mintu Mary Saju

 

 

Can you imagine a world without the electronic gadgets? Can you imagine a day without the use of your mobile phone? It’s absolutely not possible. We can’t live without any or some of the electronic equipment . As we all are dependent on machines and equipment , at the same time it’s important to be concerned on the topic E- waste they produce. Since we are  using electronic equipment on a daily basis we have to understand the other side of it.

 

E- waste in other words Electronic- waste comprises waste electronics goods which are not fit for their original use. The main compositions of e-waste includes high quality plastics and other toxic and hazardous pollutants. These compositions are highly dangerous to our nature and are likely to create an adverse impact on the environment and health,if not handled properly. Accurate figures are not available for rapidly increasing e-waste but they do increase day by day. It is said that in one year we generate 44.7 million (may be more) metric tonnes of e-waste, which is equivalent to 4500 Eiffel towers. Can you even imagine that?It’s a huge value.The one reason is the low level of awareness among manufacturers and consumers about the disposal of e-waste and the technological advancements speeding up this process.

 

 E-waste management is the method of disposal of e-waste by the collection, sorting and transportation and alternative method is the E-waste recycling. Methods of treatment and disposal includes : landfill, incineration, pyrolysis,recycle and reuse.

As we think of technological aspects we ought to first don’t forget approximately the e-waste recycling,it involves separation of the wastes and focuses on devices at component level. However, because of the multiplicity and complexity of the device, it’s hard to automate dismantling: it is still in particular finished manually, because of this that its fee is frequently too high to allow sorting right down to the level of the primary additives.

In the latter case, the maximum used technique of separation in solution of chemical factors is the so-called liquid-liquid extraction. It commonly consists first of dissolving the metals or their oxides in an acid as an instance nitric acid, then making an emulsion. The acid solution(“vinegar”) is vigorously combined with a natural solvent which includes kerosene,in an extraction column and one or more molecules having the property of promoting the transfer of certain metals from acid to solvent. As this separation step is not often ideal, it’s miles repeated in collection in order to reach the desired purity levels. Numerous dozen, even several hundred, successive extractions are from time to time necessary to attain the desired purity.

Long before our computers slow down and our smartphones incur a few too many scratches, they continue to store values, many of them locking in small quantities of precious metals which together amounted to an estimated 55 billion Euros of raw materials in 2016. Why is just 20% of e- waste collected and recycled?As stated above the metal extraction is feasible from electronic wastes,the separation of metallic additives via magnetic and eddy current separators are in vogue, in which, ferrous additives are separated  either with the aid of a permanent magnet or electromagnet, even as metals which include aluminum and copper from non-metal materials are separated in eddy contemporary separator.There’s a copper-smelting flowsheet for recycling of scrap IC boards this is ideally completed in the primary copper smelting plant, however, such centers aren’t well-established in many parts of the world.In hydrometallurgical processes, valuable metals contained in e-waste are first leached into acid or alkali solutions,and then focused by the usage of various techniques like precipitation, cementation and solvent extraction. The methods which will be used for extracting precious metals from e-waste are just like conventional hydrometallurgical technology used for metal extraction from their primary ores. However, the complex nature of e-waste makes the method complicated in comparison to natural ores.

 

Want to be a superhero? Yes, you can be a superhero but by being a responsible citizen.

It is important to create a national framework for the proper management of e-waste. Establishment of e-waste collection, exchange and recycling centers should also be encouraged. So let me conclude by making you aware that proper disposal of e-waste is the responsibility of each and every citizen in this world. The world we use is not belonging to us forever; it should be preserved or conserved for the future generations too.

 

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Mintu Mary Saju

Author
St. Joseph’s College of Engineering and technology

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