I am Mahmoud Abdel daiem, Professor at Environmental Eng. Dept, Zagazig University, Egypt, I received an MSc and Ph.D. in Environmental Engineering from Granada University, Spain. My research interest is related to the preparation of new nanomaterials and their application in different fields. The application is related to the treatment of water and wastewater, solid waste management and treatment, renewable energy, energy storage, construction material, EIA, LCA, and Water Energy Waste Nexus