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Chauhan P, Imam A, Kanaujia PK, Suman SK. Nano-bioremediation: an eco-friendly and effective step towards petroleum hydrocarbon removal from environment. ENVIRONMENTAL RESEARCH 2023; 231:116224. [PMID: 37224942 DOI: 10.1016/j.envres.2023.116224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 05/02/2023] [Accepted: 05/22/2023] [Indexed: 05/26/2023]
Abstract
Global concern about petroleum hydrocarbon pollution has intensified and gained scientific interest due to its noxious nature, high persistence in environmental matrices, and low degradability. One way to address this is by combining remediation techniques that could overcome the constraints of traditional physio-chemical and biological remediation strategies. The upgraded concept of bioremediation to nano-bioremediation in this direction offers an efficient, economical, and eco-friendly approach to mitigate petroleum contaminants. Here, we review the unique attributes of different types of nanoparticles and their synthesis procedures in remediating various petroleum pollutants. This review also highlights the microbial interaction with different metallic nanoparticles and their consequential alteration in microbial as well as enzymatic activity which expedites the remediating process. Besides, the latter part of the review explores the application of petroleum hydrocarbon degradation and the application of nano supports as immobilizing agents for microbes and enzymes. Further, the challenges and the future prospects of nano-bioremediation have also been discussed.
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Affiliation(s)
- Pooja Chauhan
- Analytical Sciences Division, Council of Scientific and Industrial Research - Indian Institute of Petroleum, Haridwar Road, Dehradun, 248005, Uttarakhand, India; Material Resource Efficiency Division, Council of Scientific and Industrial Research - Indian Institute of Petroleum, Haridwar Road, Dehradun, 248005, Uttarakhand, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Arfin Imam
- Analytical Sciences Division, Council of Scientific and Industrial Research - Indian Institute of Petroleum, Haridwar Road, Dehradun, 248005, Uttarakhand, India; Material Resource Efficiency Division, Council of Scientific and Industrial Research - Indian Institute of Petroleum, Haridwar Road, Dehradun, 248005, Uttarakhand, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Pankaj Kumar Kanaujia
- Analytical Sciences Division, Council of Scientific and Industrial Research - Indian Institute of Petroleum, Haridwar Road, Dehradun, 248005, Uttarakhand, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Sunil Kumar Suman
- Material Resource Efficiency Division, Council of Scientific and Industrial Research - Indian Institute of Petroleum, Haridwar Road, Dehradun, 248005, Uttarakhand, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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Antimicrobial impacts of zinc oxide nanoparticles on shiga toxin-producing Escherichia coli (serotype O26). ANNALS OF ANIMAL SCIENCE 2022. [DOI: 10.2478/aoas-2022-0088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Abstract
The antibacterial activity of zinc oxide nanoparticles (ZnO NPs) has received significant attention worldwide due to the emergence of multidrug-resistant microorganisms. Shiga toxin-producing Escherichia coli is a major foodborne pathogen that causes gastroenteritis that may be complicated by hemorrhagic colitis or hemolytic uremic syndrome. Therefore, this study aimed to evaluate the antimicrobial effect of ZnO NPs against E. coli O26 and its Shiga toxin type 2 (Stx2). Multidrug resistance phenotype was observed in E. coli O26, with co-resistance to several unrelated families of antimicrobial agents. Different concentrations of ZnO NPs nanoparticles (20 nm) were tested against different cell densities of E. coli O26 (108, 106 and 105 CFU/ml). The minimum inhibitory concentration (MIC) value was 1 mg/ml. Minimum bactericidal concentration (MBC) was 1.5 mg/ml, 2.5 mg/ml and 3 mg/ml, respectively, depending on ZnO NPs concentrations and bacterial cell density. Results showed a significant (P≤0.05) decrease in Stx2 level in a response to ZnO NPs treatment. As detected by quantitative real-time PCR, ZnO NPs down-regulated the expression of the Stx2 gene (P≤0.05). Moreover, various concentrations of ZnO NPs considerably reduced the total protein content in E. coli O26. There was a significant reduction in protein expression with increased ZnO NPs concentration compared to the non-treated control. Scanning electron micrographs (SEM) of the treated bacteria showed severe disruptive effects on E. coli O26 with increasing ZnO NPs concentration. The results revealed a strong correlation between the antibacterial effect and ZnO NPs concentrations. ZnO NPs exert their antibacterial activities through various mechanisms and could be used as a potent antibacterial agent against E. coli O26.
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The structure-function relationship of bacterial transcriptional regulators as a target for enhanced biodegradation of aromatic hydrocarbons. Microbiol Res 2022; 262:127087. [DOI: 10.1016/j.micres.2022.127087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 06/03/2022] [Accepted: 06/03/2022] [Indexed: 11/20/2022]
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