Extracellular Synthesis of Fe-NPs by Bacteria/Biosurfactant, Kinetic Parameter and Reduction of Cr (VI) from Pollutant Samples

Hexavalent Cr is most toxic metal and hazardous compound worldwide. It also considered to be cellular oxidizing pollutant causing damage, mutagenic hematopoietic effects living systems. Present work focused on synthesis of zero valent iron nano particles (Fe-NPs) using Bacillus subtilis SHB 13, Achromobacter xylosoxidans 204 Surfactin their application for (VI) detoxification (100 ppm) in synthetic solutions polluted sludge, sewage soil samples about 90-100% reduction observed with above particles. Qualitative analysis, structural characterization Fe-NPs, adsorption, recovery were carried out XRD, SEM TEM. This explains adsorption isotherm (Fe- NPs), was best fitted Langmuir model it followed first order rate kinetic reaction. Microcosm studies Fe-NPs tannery completely %) removed within 72 h. In another microcosm experiment, bacteria able reduce (60-70 from soils without moisture glucose. green house experiments both the (65-90%) effectively non-polluted there increase root length shoot plant L. esculentum maximum biomass plants inoculated 13.