Giovanna Cappai is an Associate Professor of Environmental Engineering at the Department of Civil, Environmental and Architectural Engineering, University of Cagliari, Italy. She teaches courses on Wastewater Treatment Plants, Control and Treatment of Atmospheric Emissions, and Environmental Engineering Laboratory. Her research activity focuses on the development of innovative and sustainable solutions for environmental remediation and the transition towards a circular economy. Her main areas of expertise include contaminated site remediation, phytoremediation and phytomining, wastewater treatment, waste valorization, resource recovery, and the recovery of critical raw materials from secondary resources. She has been involved in several national and international research projects addressing sustainable technologies for the remediation of contaminated soils and mining areas, hydrothermal carbonization, and the production and application of biochar and hydrochar. She has authored numerous peer-reviewed scientific publications and actively collaborates with academic institutions, research centers, and industrial partners on topics related to environmental sustainability, resource recovery, and circular economy strategies.