**About the Editors**

#### **Hosam M. Saleh**

Hosam M. Saleh is a professor of radioactive waste management at the Radioisotope Department, Egyptian Atomic Energy Authority, Egypt. He was awarded MSc and Ph.D. degrees in Physical Chemistry from Cairo University. Saleh has more than 26 years of experience in hazardous waste management with an emphasis on treatment and developing new matrixes for the immobilization of these wastes. He is also interested in studying innovative economic and environmentally friendly techniques for the management of hazardous and radioactive wastes. He authored many peer-reviewed scientific papers and chapters and served as a Book Editor of several books related to international publishers. He has been named among the top 2% of scientists in the world according to the Stanford University report for 2020, 2021 and 2022. He is also a reviewer, an Editor in Chief or Associate Editor for different journals as well as a member of the Technical Program Committee for international conferences. He won the Scientific Encouragement Award from Atomic Energy Authority (2013) and the Encouragement Prize in Advanced Technical Sciences from the Academy of Scientific Research (2014).

#### **Mohammad Mahmoud Dawoud**

Dr. Mohammad Mahmoud Dawoud is an environmental researcher at the Radioisotope Department, Egyptian Atomic Energy Authority, Egypt. He graduated from the Agricultural Engineering Department, Faculty of Agriculture, Ainshams University. BSc. Agricultural Engineering (Excellent with Rank of Honors); M.Sc. (Detoxification of Heavy metals From wastewater using Agriculture residues as absorbent material and Nuclear Technique); Ph.D. (Remediation of contaminated water using some physical and radiation techniques). He specializes in environmental chemistry and engineering redox and adsorption interactions, and he has more than ten years of experience in water treatment systems (reverse osmosis, sewage plants and filtration units for poultry farms, livestock and fish farms). He has designed and implemented more than 380 water treatment projects. He has participated in many research projects related to the environmental field and sustainability. Currently, he is considered one of the most important consultants in the field of water treatment in Egypt. He is also an environmental consultant for major international NGOs such as Rotary Egypt and the Alpha foundation for Environmental Technologies, and he has won many awards in this regard.
