Salma Ibrahim - Fayoum University
Mohamed Azab El-Liethy - National Research Centre
Khalid Z. Elwakeel - Univ Jeddah, Coll Sci, Dept Chem, Jeddah, Saudi Arabia
Mohammed Abd El-Gabbar Hasan - Beni-Suef University
Ali Mahmoud Al Zanaty - Beni-Suef University
Mohamed Mohamed Kamel - Natl Res Ctr, Environm Microbiol Lab, Water Pollut Res Dept, Giza 12622, Egypt