Aspergillus niger and spirogyra varians as new biosorbents of heavy metals and radionuclides from polluted ground water in South Sinai, Egypt
2011
Abd El-Azeem, A.A.M. | Gab Allah, M.M.
Diversity of total microbes in groundwater in Egypt has never been the target of any study before. The aim of the present investigation is to shed the light and raise the national awareness on the significance of the groundwater pollution in South Sinai bing the sole water resource in the area. 1620 samples of groundwater from 27 wells were analyzed from June (2008) to May (2009).Microbiological analyses included bacteria (total viable, total coliform), fungi (zoosporic, aquatic-derived) and algae. Temperature, pH, total dissolved salts, electric conductivity, NaCI %, heavy metals (Zn, Pb, Cd, Mn and Cu), total phosphate, nitrate, nitrite, ammonia, fluoride, uranium and thorium were determined. The data obtained were subjected to multivariate analyses by using Two Way Indicator Species and Canonical Correspondence analyses to find out the relationship between microorganisms and environmental variables ,Fifteen. aquatic-derived and eight aquatic zoosporic fungi were recovered, while n total of fifty algal taxa were recorded. Total coliform count, heavy metals (pb, Mn and Cu), nitrates, nitrites, fluorides and uranium contents of the majority of studied sites exceed the permissible level concentration for drinking water standards recommended by WHO and of Egyptian Standards. Aspergillus niger and Spirogyra varians were considered as new Egyptian biosorbents for removal of radionuclides within all screened species based on their potentiality. Finally it's important that fungal content of water should be considered when the microbiological safety and quality of Egyptian drinking water are assessed..
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