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- Title
Application of Serratia marcescens AJRR-22 for Effective Amelioration of Hexavalent Chromium from Industrial Effluents Contaminating Bio-geosphere.
- Authors
Jasu, Amrita; Dutta, Bandia; Das, Samir Chandra; Ray, Rina Rani
- Abstract
The strain Serratia marcescens AJRR-22, isolated from an iron mine, was found to possess the ability of reduction of hexavalent chromium, a potent pollutant of soil and water. In this study, the parameters for chromium (VI) resistance and bio-reduction were determined and optimized by response surface method (RSM). The decreased level of chromate mitigating ability of the strain in sterile medium indicates the efficacy of the strain to thrive and act in natural conditions with indigenous microbes and co-pollutants. To prove the beneficial environmental effect of Serratia marcescens AJRR-22–mediated chromium reduction, the strain was directly applied to mitigate issue concerning high level of hexavalent chromium content in both textile washout–enriched agricultural soil and tannery effluent before discharge. The atomic absorption spectroscopic (AAS) analysis indicated about 80% reduction of the hexavalent chromium from both of those samples within stipulated time. It has also shown to aid in observable enhancement of growth and germination of model plant, Cicer arietinum, in the agricultural field loaded with hexavalent chromium. The bactericidal activity of the strain indicates the ability of the strain to survive in polluted site, and its moderate antibiotic resistance makes it more applicable for effective bioremediation with the lesser chance of generation of antibiotic resistance. Hence, the present strain can be used for sustained in situ and ex situ bioremediation of hexavalent chromium.
- Subjects
HEXAVALENT chromium; SERRATIA marcescens; INDUSTRIAL wastes; IN situ bioremediation; CHICKPEA; IRON mining
- Publication
Water, Air & Soil Pollution, 2023, Vol 234, Issue 12, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-023-06757-z