Extracellular Synthesis of Fe-NPs by Bacteria/Biosurfactant, Kinetic Parameter and Reduction of Cr (VI) from Pollutant Samples
T. H. Swapna, P. Narendra Kumar, Yahya Khan, Gopal Reddy, Hameeda Bee
Journal of Advances in Microbiology · pp. 38–51 · Published 31 May 2023
10.9734/jamb/2023/v23i6730Abstract
Hexavalent Cr is most toxic metal and hazardous compound worldwide. It is also considered to be cellular oxidizing pollutant causing damage, mutagenic and hematopoietic effects to living systems. Present work is focused on synthesis of zero valent iron nano particles (Fe-NPs) using Bacillus subtilis SHB 13, Achromobacter xylosoxidans SHB 204 and Surfactin and their application for Cr (VI) detoxification (100 ppm) in synthetic solutions and polluted sludge, sewage and soil samples about 90-100% reduction observed with above particles. Qualitative analysis, structural characterization of Fe-NPs, adsorption, and recovery of Cr (VI) were carried out using XRD, SEM and TEM. This work explains adsorption isotherm of Cr with iron nano particles (Fe- NPs), was best fitted with Langmuir model and it followed first order rate kinetic reaction. Microcosm studies were carried out using Fe-NPs in sludge, sewage and tannery samples and Cr (VI) was completely (100 %) removed within 72 h. In another microcosm experiment, bacteria were able to reduce (60-70 %) Cr (VI) from soils with and without moisture and glucose. In green house experiments both the bacteria were able to reduce Cr (VI) (65-90%) effectively from both polluted and non-polluted soil and there was increase in root length and shoot length of plant L. esculentum was observed and maximum plant biomass was observed with plants inoculated with SHB 204 and SHB 13.
References (5)
- 1 Biosynthesis of gold nanoparticles using Pseudomonas aeruginosa [DOI]
- 2 Bioremediation of Hexavalent Chromium by Chromium Resistant Bacteria Reduces Phytotoxicity [DOI]
- 3 Biosorption of Chromium Using Bacteria: An Overview [DOI]
- 4 Biosynthesis of Gold Nanoparticles Using Pseudomonas Aeruginosa [DOI]
- 5 Biological strategies for detoxification of Hexavalent chromium [DOI]
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