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Yadav S, Sharma A, Khan MA, Sharma R, Celin M, Malik A, Sharma S. Enhancing hexahydro-1, 3, 5-trinitro-1, 3, 5-triazine (RDX) remediation through water-dispersible Microbacterium esteraromaticum granules. J Environ Manage 2020; 264:110446. [PMID: 32250888 DOI: 10.1016/j.jenvman.2020.110446] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 02/21/2020] [Accepted: 03/15/2020] [Indexed: 06/11/2023]
Abstract
In the current manuscript, we explored the remediation potential of Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) by Gram-positive Microbacterium esteraromaticum 12849. The strain detoxified 70.9 and 63.93% RDX in minimal nutrient medium and soil, respectively. Subsequently, the strain 12849 was formulated in form of water-dispersible granules (WDG) using talcum powder and alginic acid as inert ingredients. During the microcosm study, WDG exhibited 8.98% enhanced RDX degradation in contrast to the unformulated Microbacterium esteraromaticum. The LC-MS analysis revealed the presence of two intermediates, namely N-methyl-N, N'-dinitromethanediamine, and methylenedintramine, during the RDX degradation by strain 12849 in soil. Interestingly, no significant difference was observed in the rate of RDX degradation by strain 12849 due to the formulation process. The first-order kinetics was seen in RDX degradation with a degradation coefficient of 0.04 and 0.0339 day-1 by formulated and unformulated strain, respectively. The current investigation implies M. esteraromaticum as a potential microbe for RDX degradation and opens up the possibility of exploiting it in its effective WDG form for explosive contaminated sites.
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Affiliation(s)
- Sonal Yadav
- Centre for Rural Development and Technology, Indian Institute of Technology Delhi, Hauz Khas, Delhi, 110016, India
| | - Abhishek Sharma
- Amity Food and Agriculture Foundation, Amity University Uttar Pradesh, Noida, 201313, India
| | - Mohd Aamir Khan
- Centre for Rural Development and Technology, Indian Institute of Technology Delhi, Hauz Khas, Delhi, 110016, India
| | - Ranju Sharma
- Centre for Rural Development and Technology, Indian Institute of Technology Delhi, Hauz Khas, Delhi, 110016, India
| | - Mary Celin
- Centre for Fire, Explosives and Environment Safety, Defence Research & Development Organization, Min. of Defence, Brig. Mazumdar Road, Delhi, 110 054, India
| | - Anushree Malik
- Centre for Rural Development and Technology, Indian Institute of Technology Delhi, Hauz Khas, Delhi, 110016, India
| | - Satyawati Sharma
- Centre for Rural Development and Technology, Indian Institute of Technology Delhi, Hauz Khas, Delhi, 110016, India.
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