Environmental risk assessment associated with acidic volcanics in Egypt

Mohamed Y. Hanfi, Ahmed E. Abdel Gawad, Khaled G. Ali, Atef Abu-Donia, Khalid G. Alsafi, Mawya Khafaji, Sarah Albahiti, Mohammed S. Alqahtani, Tarek M. Khalil, Adel A. Abdel Wahed