Abstract
Environmental chemical study were carried out on the Fatimid cemetery marsh at Aswan City(24 degrees 1'N and 32 degrees 9'E), Egypt, Marsh contents(warter, soil, sediment, metal and nonmetal-bearing salts, and emergent weed) were analysed to known the source of marsh water, speciation of the different elements between the marsh contents, and the toleration of emergent weed(Phargmites australies) for different metals and their bioaccumulation coefficients. Thus, metals(Ca, Mg, Na, K, Ni, Fe, Mn, Cu, Zn, Cd and Pb) and nonmetals(CO(3)2-, HCO3-, Cl-, SO(4)2-, PO(4)3-, NO3-, SiO2, organic matter and pH value) were determined in the samples. According to the chemical analysis, and applying the base exchange equation(water type) and calculate the hydrochemical parameters for marsh water samples, we can indicate that the marsh water is ground water with Na-SO4 type and deep meteoric genesis. Topsoil of marsh dry land characterized by CaCl as dominant salt, while NaCl is a dominant salt in subsoil. The elevated pH values of marsh contents minimized the metal solubilities in different samples. Phragmites australies showed a strong ability to accumulate Mn and Fe in the aerial part in opposite to Co, Ni and Cd.