Correlation between cell surface physicochemical properties of bacterial strains and their chromium removal potential

Meryem Asri (1) , Alae Elabed (2, 1) , Nabil Tirry (1) , Aziza Kouchou (1) , Saad Ibnsouda Koraichi (1) , Naïma El Ghachtouli (1) , Soumya Elabed (1)

1 USMBA - Université Sidi Mohamed Ben Abdellah
2 LGC - Laboratoire de Génie Chimique

Physicochemical characterization of microbes has gained recently a great interest by scientific community. It is proved of extreme importance in several fields of science and technology applications such as bioremediation. In this work, we investigated the establishment of a possible correlation between chromium removal capacity of seven bacterial strains isolated from contaminated sites with industrial wastes including tanning processing and their cell surface physicochemical properties. Thus, hydrophobicity and donor/acceptor electrons character were obtained using contact angle measurements. Statistical analysis showed a high significant positive correlation between hexavalent chromium (Cr(VI)) removal by the strains and their acceptor electron character γ+(r = 0.90). While significant negative correlation between the Cr(VI) removal potential and the ΔGiwi value (r = −0.844) and also with their donor electron character γ− (r = −0.746) were observed. These results may contribute to determine a selectrion criteria of bacteria that can be operated in bioremediation applications.

Mots clés: Bacterial strains; Cr(VI) removal; Cell surface physico-chemical characteristics; Correlation; Bioremediation

Domaines: Biotechnologies; Génie des procédés; Bactériologie

Meryem Asri, Alae Elabed, Nabil Tirry, Aziza Kouchou, Saad Ibnsouda Koraichi, et al.. Correlation between cell surface physicochemical properties of bacterial strains and their chromium removal potential. Journal of Adhesion Science and Technology, 2017, 31 (24), pp.2730-2740. ⟨10.1080/01694243.2017.1321178⟩. ⟨hal-02134841⟩