Heavy metal pollution possess a great potential threat to the environment and has its own damaging effects to plants, animals and ultimately to human health, because of its release into the environment and water bodies results in a variety of illnesses related with the risk of dermal damage, respiratory problems and several kinds of cancer. A number of researches have been carried out for the removal of heavy metals from aqueous solutions by using biomass to reduce the problem of limited and scarce water resources which is considered the most important obstacles at all that prevent the continued implementation of plans State's expansion, maximize benefit from the available water resources and reduce the growing gap between available water resources and the required water needs to maintain international water security and the health of the human. Thus, our work is to investigate the ability of natural biosorbents for removing heavy metal by studying the effect of nano sized Flamboyant (Delonix regia) and Moringa oleifera on adsorption of Cd2+ and Pb2+ ions from aqueous solution. The model system used in this study consisted of the biosorbents (Delonix regia and Moringa oleifera).

Dr. Ahmed Mohammed Abu-Dief Mohammed, Lecturer of Bioinorganic and Physical Chemistry at Chemistry Department,Faculty of Science, Sohag University, Egypt, Post doctor, Faculty of Chemistry, Oviedo University, Spain,2015. He publishes more than 47 articles in an international journals and participate in 32 workshops and international conferences