Tolerance and Cadmium (Cd) Immobilization by Native Bacteria Isolated in Cocoa Soils with Presence of Metal

• DOI: 10.2139/ssrn.3954814
• Publication Date: 2021-11-13T03:06:10Z
• Authors: Pedro Felipe Feria; Lucas Penagos Vélez; Claudia Ximena Mo...

The presence of geogenic cadmium (Cd) contaminated environment, especially in soil, has raised serious health hazards through the food chain. Bacteria have been applied for bioremediation cadmium-contaminated environment by biosorption or bioaccumulation interactions; this process is considered as a potential eco-friendly alternative. In present work, twelve native bacteria tolerant to 2,500 µM CdCl2(120 mg/L) isolated soils cocoa farms different levels Cd were selected, evaluate their tolerance and immobilization using liquid culture medium (Nutritive broth) two concentration (10 15 ability capture strains broth was characterized Transmission Electron Microscopy (TEM) changes functional groups cell surface analyzed Fourier Transform infrared spectroscopy (FT-IR), furthermore, greenhouse experiments carried out Exiguobacterium sp. (11-4A), Klebsiella variicola (18-4B), Enterobacter (29-4B) combined treatments CCN51 cacao genotype seeds grown soil with concentrations Cd. TEM images showed deformation morphology all identify six interactions four capacities; FT-IR analysis suggested that amide, carbonyl, hydroxyl, ethyl, phosphate on biomass main binding sites Cd; pot experiments, distributed parts plant, but certain degree can occur preventing increased root strain promising adsorbent avoid translocation plant.