S. Jodeh

Department of Chemistry, An-Najah Nation University, P.O. Box 7, Nablus, State of Palestine

R. Alkowni

Department of Biology, An-Najah Nation University, P.O. Box 7, Nablus, State of Palestine

R. Hamed

Department of Chemistry, An-Najah Nation University, P.O. Box 7, Nablus, State of Palestine

S. Samhan

Research and Development, Palestinian water Authoroty, P.O. Box 2174, Ramallah, State of Palestine