The research group of Professor Hiroshi Hasegawa of Kanazawa University College of Science and Technology and Professor Katsuhiro Maeda of Nano Life Science Institute uses chemically modified cellulose as an adsorbent and is a precious metal required from industrial waste. We have developed an epoch-making method to select and collect only.
The amount of precious metals supplied is small because it is difficult to make compounds.However, the demand is increasing year by year for use in electronic devices and medical devices.Ideally, only the precious metals that are needed from the industrial waste that is no longer needed and discarded can be collected and recycled or reused, but the current standard method involves a complicated process. In addition to having to, the cost is high and the collection efficiency is not high.
Therefore, the research group has developed a method for selectively recovering only silver and palladium from acidic waste liquids.High-purity silver and palladium can be recovered by a simple method of using chemically modified cellulose and directly passing the waste liquid to adsorb silver and palladium with an efficiency of 99% or more and then incinerating them.
Compared to conventional recovery technologies, this method has the world's highest maximum adsorption amount of precious metals that can be collected on the adsorbent, and exhibits high performance without being affected by the presence of a large amount of other chemical components. There is a feature.In the future, it is expected to contribute to the realization of a sustainable society through the stable recycling of precious metals through environmentally friendly processes.
Article information: [Chemical Engineering Journal] Selective recovery of silver and palladium from acidic waste solutions using dithiocarbamate-functionalized cellulose
