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Dr. Rasha Mohamed Mostafa El-Meihy :: Publications:

Title:
Bacterial biosurfactant from Citrobacter freundii MG812314.1 as a bioremoval tool of heavy metals from wastewater
Authors: Eman Z. Gomaa; Rasha M. El-Meihy
Year: 2019
Keywords: Heavy metals, Biosurfactant, Wastewater, Bioremediation, Citrobacter freundii
Journal: Bulletin of the National Research Centre
Volume: 43
Issue: 69
Pages: 1-14
Publisher: Springer
Local/International: International
Paper Link:
Full paper Rasha Mohamed Mostafa El-Meihy_19 Biosurfactant 2019.pdf
Supplementary materials Not Available
Abstract:

Background: The problem of heavy metal contamination is a global issue, and the challenge is to develop methods to remove heavy metals from soil and water. Recently, biosurfactants are one of the compounds that provide an attractive eco-friendly alternative to the physicochemical process in alleviating the heavy metals. Results: Sixty bacterial isolates were isolated from Al-Rahawy drain sediments and screened for biosurfactant production. Only 10 isolates were recoded as biosurfactant producers by the oil spreading and emulsifying assays in addition to the ability of biosurfactant on heavy metal removal in wastewater. The most potent isolate was identified using morphological, cultural, biochemical characteristics, antibiotics susceptibility, and 16s rRNA technique as Citrobacter freundii MG812314.1. Conclusions: The produced biosurfactant was found to be more effective in removing heavy metals from wastewater, viz 80, 67, 66, 55, 45, 44, and 41% of aluminum, lead, zinc, cadmium, iron, copper, and manganese, respectively, under two inoculum potentials and two contact time. The interaction of heavy metals with biosurfactant was monitored using scanning electron microscope (SEM), energy dispersive X-ray spectra (EDX), and Fourier-transform infrared spectroscopy (FTIR) analyses.

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