How do you extract gold from electronic waste? A research team answers
In an era where devices are rapidly changing from new to forgotten, computers and smartphones often end up in landfills, without many realizing that this electronic waste hides within it literal treasures. Each electronic chip may contain atoms of pure gold, which are wasted every day along with millions of tons of electronic waste.
At a time when traditional gold mining is considered one of the most environmentally polluting industries, in terms of resource consumption and the use of toxic chemicals such as mercury and cyanide (cyanide is a chemical compound and mercury is a chemical element, and both are included in some industries and pose a threat to human health), innovative solutions are emerging that are reshaping the features of the industry with more sustainable and less harmful methods. Can old computers and phones be turned into a source of gold without polluting the land or poisoning the water?
Based on these developments,Earth Guards In this article, we will discuss how an international research team has come up with a new technology that creates a qualitative shift in the extraction of gold from electronic waste, through a non-toxic and sustainable process, applicable on an industrial scale, while highlighting its direct connection to the Sustainable Development Goals (SDGs), especially those related to responsible production, innovation, and safe management. For waste.
With the growing reliance on electronic devices, digital waste has become an increasing environmental challenge. Every year the world produces more than 50 million tons of electronic waste containing precious metals, such as gold and copper, but only a small percentage is recycled in efficient and safe ways.
Therefore, Flinders University in Australia sought to rely on science to recycle this type of waste. It announceda new scientific discovery, which is the first of its kind in the field of extracting gold from multiple sources, such as electronic waste. The team, which includes experts in chemistry, engineering, and physics, explained that the new method relies on a safe compound that was originally used to sterilize water, as an alternative to the toxic materials traditionally used. Through processing chips and memory cards – with their large percentages of gold metal – the results were promising, and showed high efficiency in extracting gold with great purity, even from complex multi-metallic waste.
This compound, on which the new scientific discovery is based – known as “trichloroisocyanuric acid” – is activated using salt water. It can then dissolve the gold in the electronic waste, which is then extracted using a sulfur-rich polymer developed specifically for this process. This polymer can be reused repeatedly; This makes the process sustainable and suitable for repeated use.
Unlike traditional methods, this technology does not produce dangerous chemical waste, and it reduces the environmental and health risks associated with mining operations, especially in areas where workers rely on mercury to separate gold, which supports Goal (3) of the Sustainable Development Goals (SDGs) related to good health and well-being. In addition, this method represents a practical application of Goal (12) “Responsible Consumption and Production,” as it provides a model for using resources effectively without polluting the environment or exposing workers to danger.
Waste is an economic resource
This new scientific discovery constitutes an important opportunity to develop the circular economy, by converting waste into resources, and reducing dependence on traditional mining that consumes huge energy and resources, which directly supports Goal (9) of the Sustainable Development Goals (SDGs) “Industry, Innovation and Infrastructure”, by developing clean and efficient industrial processes. This innovation also opens the door to the development of national systems for managing electronic waste, especially in countries that lack a recycling infrastructure. Which enhances the achievement of Goal (11) “Sustainable Cities and Local Communities.”
This approach serves not only the economic and environmental dimensions, but also the social dimension. It enhances environmental and health justice, and gives workers in small-scale mining safer and more sustainable tools, which is consistent with Goal (8) “Decent Work and Economic Growth,” by improving working conditions in the gold mining sector globally. This experience also contributes to enhancing confidence in green technologies, in direct support of Goal (13) “Climate Action,” which calls for reducing emissions and pollution resulting from heavy industries.
Future prospects and realistic challenges
Despite the encouraging results, the dissemination of the new technology faces challenges related to the ability of factories to adapt to the new method, the need to finance industrial production stages, in addition to regulatory approval requirements in different countries. However, the economic and environmental potential of this method places it in an advanced position on the list of scalable solutions.
Therefore, the study team seeks to transfer the technology from the laboratory to the field, through partnerships with industrial institutions and mining and recycling companies. The researchers also continue to improve the properties of the polymer used and reduce production costs, ensuring the sustainability of the process in the long term. Hence,Earth Guards calls onto continue and support work on such projects. The innovator, stressing that practical developments, such as cleanly extracting gold from electronic waste, demonstrate how innovation can represent a sustainable path that protects the environment and supports the economy at the same time.
