E- Waste Recycling-The Profit Of Crores

Old-fashioned phones, computers, printers etc. are a big problem for the environment and human health. These tools contain many precious metals like gold, silver, and copper. To separate these metals from electronic waste, harmful methods are adopted in the unorganized sector. Indian scientists have developed a method that can help in recycling e-waste without harming the environment.

Scientist Introduced A New Technique To Recycle E-Waste

Scientists of National Institute of Technology (NIT), Mizoram, CSIR-Mineral and Materials Technology (IMMT), Bhubaneswar and SRM Institute of Science and Technology, Modinagar together have developed a new method combining processes such as incubation and acid nitrogen( microbial incubation )to remove precious metals like gold and silver from e-waste. This new method works in seven steps. First of all, the e-waste is heated in a microwave furnace for 45 minutes at 1450-1600 degree centigrade heat. After heating, the molten plastic and metal slag are separated. After this, chemical separation with the help of aqua regia of nitric acid has been done. Concentrated Nitric Acid removes the metals and purifies the collected metals.
The e-waste used in this study, while heating the e-waste in the microwave furnace the integrated chip (IC), pogo pin, metal wire, epoxy base, extracted from scrap printed circuit boards (PCB) of old computers and mobile Plate, electrolyte capacitors, batteries, small transformers, and plastic materials were included. During this study, 20 kg of e-waste was first heated in the microwave and then acid refinement was done. This has brought about three kilograms of metal products. In these metals, 55.7 percent copper, 11.64 percent iron, 9.98 percent aluminum, 0.19 percent lead, 0.98 percent nickel, 0.05 percent gold and 0.05 percent silver was found. Electricity consumption in this process is also very low.
. . Dr. Satya Sai Srikant and Dr. Bijayanand Mohanty and chief researcher Rajendra Prasad Mahapatra told India Science Wire that 'e-trash is very different from chemical or physical properties in domestic or industrial waste. Along with being dangerous for organisms, the maintenance of e-waste is challenging. Generally, the use of chemical separation (Separation) is done with a mixture of effluent or plasma method for getting precious metals from e-waste. According to two other senior scientists associated with this study, "This newly developed method of microwave energy compared to conventional methods is less time consuming, low power consumption and reducing precious metals from e-waste at a relatively low temperature. Has emerged as an environmentally friendly, clean and economical process.
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