الفهرس 
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Abstract
Egypt has a fixed and rather limited surface and groundwater resources.The present per capita water availability is in the order of 1000 cubic meterper year which indicates that Egypt is currently under ”Water Stress”. Toxicheavy metals pollution of water is a major environmental problem, andmost conventional remediation approaches do not provide acceptable solutions. Wetland plants such as the water hyacinth ”Eichhornia crassipes”have been used successfully for the Phytoremediation of heavy metals innatural and constructed wetlands. The present thesis was undertaken todetermine experimentally the treatment of industrial wastewater collected from ”Mubarak Industrial Area”, Menofia Governorate, Egypt, for removalof heavy metals using different root’s type of the water hyacinth, using two different instrumentation techniques which are Inductively Coupled Plasma”ICP-MS”, and Laser Induced Breakdown Spectroscopy ”LIBS”. Results obtained indicated that water hyacinth roots are highly effective in treatment of wastewater to be used for irrigation. Roots used in different forms (whole fresh roots, whole dry roots, coarse grinded dry roots, and fine grinded dry roots) under controlled experimental designed conditions.On comparing the reduction percentages of investigated heavy metals it was found that, about 50 % of studied metals were removed within 1hr. ( Cu,, Zn, Cr and Ni ), 26 % within 9hr (Mn and Ba), 10% in 6hr (Cd) and 10% in 24 hr (Fe ). Maximum reduction percentages were recorded for Mn(87.88%) followed by Cd (81.69 %) , Fe (81.09), and Cu (77.56 %), whileminimum percentages were observed for Ba (31.94 % ) followed by Ni%) and Cr (46.51%). The whole fresh roots showed the best efficiency in metals removal within time interval ranging between 1–24 hours which favors short–term Phytoremediation systems that are usually done in suburban areas where space is limited for long – term treatments.