**About the Editors**

**Zhien Zhang** is a Research Fellow in William G. Lowrie Department of Chemical and Biomolecular Engineering at Ohio State University. His research interests include the advanced processes and materials for gas capture, gas separation and Carbon Capture, Utilization and Storage (CCUS). Dr. Zhang has published more than 90 peer-reviewed journal papers and 17 editorials in high-impact journals such as *Renewable & Sustainable Energy Reviews* and *Applied Energy*. He is Editorial Supervisor in *Journal of Natural Gas Science and Engineering* and Editor in some international journals, e.g., *Applied Energy*, *Processes*, *Environmental Chemistry Letters*, etc.

**Avelino N ´u ˜nez-Delgado** (PhD). Avelino Nu´nez-Delgado is a Professor at the Department of Soil ˜ Science and Agricultural Chemistry at the University of Santiago de Compostela. His main research interests include: recycling, studying red mud as a sorbent material, sewage sludge, wood ash, and other types of waste and by-products, as well as different mixtures, retention/inactivation of pathogens and chemical contaminants, and potential for agronomic recycling of various types of waste and by-products. Lately, his main research has been focused on the retention of pollutants and the use of by-products to reach this end, with this facilitating the recycling of these materials. He has published 200+ scientific articles, authored several book chapters and books, and his research group has already registered eight patents in these topics.

**Wenxiang Zhang** is Research Fellow in University of Macau and Professor in South China Agricultural University. His research interests include water and wastewater treatment, advanced membrane materials and membrane processes and harmless disposal and recycling utilization of agricultural wastes. Dr. Zhang has published more than 50 peer-reviewed journal papers.
