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The Impacts of Different Biological Treatments on the Transformation of Explosives Waste Contaminated Sludge
The dinitrotoluene isomers 2,4 and 2,6-dinitrotoluene (DNT) represent highly toxic, mutagenic, and carcinogenic compounds used in explosive manufacturing and in commercial production of polyurethane foam. Bioremediation, the use of microbes to degrade residual DNT in industry wastewaters, represents...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8398102/ https://www.ncbi.nlm.nih.gov/pubmed/34443401 http://dx.doi.org/10.3390/molecules26164814 |
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author | Aburto-Medina, Arturo Shahsavari, Esmaeil Taha, Mohamed Bates, Andrew Van Ieperen, Leon Ball, Andrew S. |
author_facet | Aburto-Medina, Arturo Shahsavari, Esmaeil Taha, Mohamed Bates, Andrew Van Ieperen, Leon Ball, Andrew S. |
author_sort | Aburto-Medina, Arturo |
collection | PubMed |
description | The dinitrotoluene isomers 2,4 and 2,6-dinitrotoluene (DNT) represent highly toxic, mutagenic, and carcinogenic compounds used in explosive manufacturing and in commercial production of polyurethane foam. Bioremediation, the use of microbes to degrade residual DNT in industry wastewaters, represents a promising, low cost and environmentally friendly alternative technology to landfilling. In the present study, the effect of different bioremediation strategies on the degradation of DNT in a microcosm-based study was evaluated. Biostimulation of the indigenous microbial community with sulphur phosphate (2.3 g/kg sludge) enhanced DNT transformation (82% transformation, from 300 g/L at Day 0 to 55 g/L in week 6) compared to natural attenuation over the same period at 25 °C. The indigenous microbial activity was found to be capable of transforming the contaminant, with around 70% transformation of DNT occurring over the microcosm study. 16S rDNA sequence analysis revealed that while the original bacterial community was dominated by Gammaproteobacteria (30%), the addition of sulphur phosphate significantly increased the abundance of Betaproteobacteria by the end of the biostimulation treatment, with the bacterial community dominated by Burkholderia (46%) followed by Rhodanobacter, Acidovorax and Pseudomonas. In summary, the results suggest biostimulation as a treatment choice for the remediation of dinitrotoluenes and explosives waste. |
format | Online Article Text |
id | pubmed-8398102 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-83981022021-08-29 The Impacts of Different Biological Treatments on the Transformation of Explosives Waste Contaminated Sludge Aburto-Medina, Arturo Shahsavari, Esmaeil Taha, Mohamed Bates, Andrew Van Ieperen, Leon Ball, Andrew S. Molecules Article The dinitrotoluene isomers 2,4 and 2,6-dinitrotoluene (DNT) represent highly toxic, mutagenic, and carcinogenic compounds used in explosive manufacturing and in commercial production of polyurethane foam. Bioremediation, the use of microbes to degrade residual DNT in industry wastewaters, represents a promising, low cost and environmentally friendly alternative technology to landfilling. In the present study, the effect of different bioremediation strategies on the degradation of DNT in a microcosm-based study was evaluated. Biostimulation of the indigenous microbial community with sulphur phosphate (2.3 g/kg sludge) enhanced DNT transformation (82% transformation, from 300 g/L at Day 0 to 55 g/L in week 6) compared to natural attenuation over the same period at 25 °C. The indigenous microbial activity was found to be capable of transforming the contaminant, with around 70% transformation of DNT occurring over the microcosm study. 16S rDNA sequence analysis revealed that while the original bacterial community was dominated by Gammaproteobacteria (30%), the addition of sulphur phosphate significantly increased the abundance of Betaproteobacteria by the end of the biostimulation treatment, with the bacterial community dominated by Burkholderia (46%) followed by Rhodanobacter, Acidovorax and Pseudomonas. In summary, the results suggest biostimulation as a treatment choice for the remediation of dinitrotoluenes and explosives waste. MDPI 2021-08-09 /pmc/articles/PMC8398102/ /pubmed/34443401 http://dx.doi.org/10.3390/molecules26164814 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Aburto-Medina, Arturo Shahsavari, Esmaeil Taha, Mohamed Bates, Andrew Van Ieperen, Leon Ball, Andrew S. The Impacts of Different Biological Treatments on the Transformation of Explosives Waste Contaminated Sludge |
title | The Impacts of Different Biological Treatments on the Transformation of Explosives Waste Contaminated Sludge |
title_full | The Impacts of Different Biological Treatments on the Transformation of Explosives Waste Contaminated Sludge |
title_fullStr | The Impacts of Different Biological Treatments on the Transformation of Explosives Waste Contaminated Sludge |
title_full_unstemmed | The Impacts of Different Biological Treatments on the Transformation of Explosives Waste Contaminated Sludge |
title_short | The Impacts of Different Biological Treatments on the Transformation of Explosives Waste Contaminated Sludge |
title_sort | impacts of different biological treatments on the transformation of explosives waste contaminated sludge |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8398102/ https://www.ncbi.nlm.nih.gov/pubmed/34443401 http://dx.doi.org/10.3390/molecules26164814 |
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