Application of Biosurfactant Producing Microorganisms to Remediate Heavy Metal Pollution in El-Gabal El-Asfar Area

Yaseen, Rabaa Y.; Abd El-Aziz, Samah M.; Eissa, Doaa T.; Abou-Shady, Ahmed M.

doi:10.21608/asejaiqjsae.2018.5504

Application of Biosurfactant Producing Microorganisms to Remediate Heavy Metal Pollution in El-Gabal El-Asfar Area

Document Type : Original Article

Authors

¹ Soil Fertility and Microbiology Department, Water Resources and Desert Soils Division, Desert Research Center, El-Matariya 11753, Cairo, Egypt

² Laboratory of Water & Soil Chemistry, Water Resources and Desert Soils Division, Desert Research Center, El-Matariya 11753, Cairo, Egypt.

10.21608/asejaiqjsae.2018.5504

Abstract

In the present study, the effects of biosurfactant producing cells of different bacterial species namely Pseudochrobactrum lubricantisa, Lysobacter novalis, and crude biosurfactant extracted from Aspergillus niger were investigated as a cheap source to alleviate the availability of Pb²⁺ for plants grown in El-Gabal El-Asfar area, Egypt. This is owing to these areas are basically depend on the reused wastewater for irrigation. Biosurfactant producing microorganisms were isolated from three different farms aged for 20, 40, and 60 years. The obtained results showed that, the biosurfactant producing bacteria decreased the availability of Pb²⁺ in the outlet leachate during the leaching columns experiments. In contrast, Sr²⁺ leachate showed the reverse trend that was observed with Pb²⁺. Taguchi approach indicated that, the mechanisms of biosurfactant producing bacteria are very complicated and interfused with each other. The most factors affected the available form of Pb²⁺ and Pb²⁺existed in organic form was Pb²⁺ concentrations, however the exchangeable Pb²⁺, Pb²⁺ bond to carbonate, Pb²⁺ bond to sulfate, and plant content the most influential factors was biosurfactant producing bacteria. The most influential factors affected NPK uptake by watercress were found to take the following sequence biosurfactant producing bacteria > Sr²⁺ doses > Pb²⁺ doses.

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