Lei WANG is dedicated to exploring the principles of ecological restoration of water pollution and developing efficient control technologies. His research centers on areas like water quality and ecological risk assessment, source apportionment, reclaimed water treatment and reuse, and the remediation of polluted waters. He has published numerous papers in leading journals such as Nature Water, Environmental Science & Technology, and Water Research, as well as in monographs like The Handbook of Environmental Chemistry, as the first or corresponding author.