**About the Editors**

**Prof. Dr. Corby G. Anderson** is a licensed Professional Chemical Engineer with over 40 years of global experience in industrial operations, corporate level management, engineering, design, consulting, teaching, research and professional service. He is a native of Butte, America. His career includes positions with Thiokol Chemical Corporation, Key Tronic Corporation, Sunshine Mining and Refining Company, H. A. Simons Ltd., and at CAMP-Montana Tech. He holds a BSc in Chemical Engineering from Montana State University and an MSc from Montana Tech in Metallurgical Engineering, as well as a PhD from the University of Idaho in Mining Engineering—Metallurgy. He is a Fellow of both the Institution of Chemical Engineers and of the Institute of Materials, Minerals and Mining. He shares 14 international patents and 5 new patent applications, covering several innovative technologies, 2 of which were successfully reduced to industrial practice. He currently serves as the Harrison Western Professor in the Kroll Institute for Extractive Metallurgy, as part of both the Mining Engineering Department and the George S. Ansell Department of Metallurgical and Materials Engineering at the Colorado School of Mines. In 2009, he was honored by the Society for Mining Metallurgy and Exploration, with the Milton E. Wadsworth Extractive Metallurgy Award for his contributions in hydrometallurgical research. In 2015, he was awarded the International Precious Metals Institute's Tanaka Distinguished Achievement Award. In 2016, he received the Distinguished Member Award from the Society for Mining, Metallurgy and Exploration, the Outstanding Faculty Award from the George S. Ansell Department of Metallurgical and Materials Engineering at Colorado School of Mines, and became a Distinguished Member of the U of Idaho Academy of Engineering. In 2017, he received the EPD Distinguished Lecturer Award from The Minerals, Metals and Materials Society. In 2019, he was named as a Henry Krumb Distinguished SME Lecturer. In 2019, he was also appointed as a Visiting Faculty within the Minerals Engineering Department of Central South University in China, the largest Mineral Processing and Extractive Metallurgy program in the world. Lastly, in 2016 and in 2021 he received an Outstanding Faculty Award from the Colorado School of Mines.

**Dr. Hao Cui**'s research expertise concentrates on refractory gold treatment, rare earth beneficiation, and the recycling of e-waste. Hao received his BS degree in mineral processing engineering from the University of Technology & Science, Beijing in 2012, and obtained his MS and PhD in metallurgical engineering from the Colorado School of Mines in 2015 and 2018, respectively. In 2017, he was awarded the International Precious Metals Institute's Gero Family Trust Bright Future Award. Hao worked as a metallurgist (2019–2021) at Nevada Gold Mines, LLC, looking at opportunities to improve gold recovery through the implementation of test programs and technical research, specifically pertaining to gold cyanide and thiosulfate leaching.
