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Swiss Innovation Enables Gold Extraction From Old Appliances, Promoting Sustainable Economy and Reducing Electronic Waste
In Switzerland, researchers from the renowned ETH Zurich are at the forefront of innovation by developing a revolutionary and eco-friendly method to extract gold from discarded electronic devices, such as old appliances and computer motherboards.
This approach not only promotes a sustainable economy but also provides a viable solution to the growing problem of electronic waste accumulation, which is one of the major environmental challenges of the 21st century.
Food Waste Transformed Into Gold Sponges
The method developed by Swiss scientists is notable for its creativity and sustainability. By using byproducts from the food industry, such as residue from cheese production, researchers have created protein fibril sponges.
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This innovative material can attract and recover precious metals efficiently, removing the need for harsh chemicals commonly used in traditional mining and recycling processes.
Detailed Gold Extraction Process
The extraction of gold begins with the denaturation of milk whey proteins, which occurs under specific conditions of acidity and high temperature.
This results in the formation of a suspension of protein nanofibrils, which is then dried and transformed into a sponge.
The metallic parts of electronic devices, such as computer motherboards, are dissolved and ionized. When the sponge is immersed in this solution, the gold ions are efficiently attracted and captured by the protein matrix.
This process is not only efficient but also highly scalable, meaning it can be adapted for different types of electronic devices, ranging from small gadgets to large appliances.
This flexibility is crucial, as electronic waste is incredibly diverse in terms of composition and size of devices.
Impressive Results: Gold and Economy in Action
The results obtained by the researchers are impressive. The team was able to extract a 22-carat gold nugget weighing 450 mg, using only 20 computer motherboards.
This nugget, consisting of 91% gold and 9% copper, was valued at around US$ 33 (approximately R$ 192). While the financial value may seem modest at first glance, the true impact lies in the economic and environmental viability of the process.
By transforming electronic waste into a valuable resource, this technique demonstrates how recycling can be not only sustainable but also profitable.
Transformation of Electronic Waste Into Valuable Resource
The Swiss initiative highlights Switzerland as a leader in sustainable technological solutions, showing that it is possible to turn electronic waste into a valuable resource, benefiting both the economy and the environment.
This innovative method could inspire other nations to adopt similar practices, significantly reducing the environmental impact associated with improper electronic disposal.
Furthermore, extracting gold and other precious metals from electronic devices can lessen the dependency on traditional mining, which often involves environmentally harmful practices and unfair working conditions.
By promoting recycling and material reuse, this technology can help preserve natural ecosystems and encourage more responsible consumption practices.
Global Impact and Promising Future
The development of this method in Switzerland not only represents a significant technological advance but also offers a glimpse into a future where circular economy becomes a tangible reality.
By transforming waste into resources, the Swiss approach can contribute to the reduction of global electronic waste, which is growing at an alarming rate each year.
Additionally, by encouraging large-scale recycling of electronics, this method can help create new job and innovation opportunities in the sustainable technology sector.
This advancement may be the first step towards a more conscious production and consumption model, where waste is minimized and resources are maximized.
The hope is that other universities and companies around the world will adopt and adapt this technology, promoting a lasting positive impact for society and the global environment.
SOURCE: NDMAIS
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