According to the "Asahi Shimbun," Japan reported on August 2 that a team led by Professor Shirayuki Yamashita from Shibaura University of Technology has developed an innovative technology that uses microorganisms to extract selenium—a rare metal—from industrial wastewater. This breakthrough could pave the way for commercial applications, as the recovered selenium can be reused as a valuable resource.
Selenium is a trace element found in small quantities within copper ores and plays a key role in various industries. It is used as a raw material in solar panels and also serves in the production of colored or clear glass. However, when dissolved in water, selenium becomes highly toxic. Ingesting excessive amounts can lead to serious health issues, including neurological problems and other adverse effects.
The research team discovered specific microorganisms capable of converting selenate and selenite into elemental selenium. These microbes were found in sludge near a selenium refining plant. By cultivating them in industrial wastewater, the researchers managed to recover up to 78.8% of the selenium present. This method not only helps reduce environmental pollution but also offers a sustainable way to recycle precious resources.
This development highlights the potential of biotechnology in addressing both environmental and industrial challenges. As the demand for rare metals continues to grow, such eco-friendly recovery methods may become increasingly important in the future. (Internship compilation: Yang Jie | Reviewer: Wang Huan)
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