Biodegradation of low, medium and high molecular weight phthalate by Gordonia sp. in a batch system: Kinetics and phytotoxicity analyses
ABSTRACTPhthalic acid esters (PAEs) are highly toxic compounds and can disrupt the hormonal balance of human, animal, and aquatic organisms. Due to the hazardous nature of such compounds, their removal from constituent wastewater before discharging into the environment is mandatory. This study focus...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2023-12-01
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| Series: | Bioengineered |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/21655979.2023.2229094 |
| _version_ | 1797789226409918464 |
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| author | Dipak Kumar Kanaujiya Atharva More Ajay Kumar Chhantyal Rama Karn Kannan Pakshirajan |
| author_facet | Dipak Kumar Kanaujiya Atharva More Ajay Kumar Chhantyal Rama Karn Kannan Pakshirajan |
| author_sort | Dipak Kumar Kanaujiya |
| collection | DOAJ |
| description | ABSTRACTPhthalic acid esters (PAEs) are highly toxic compounds and can disrupt the hormonal balance of human, animal, and aquatic organisms. Due to the hazardous nature of such compounds, their removal from constituent wastewater before discharging into the environment is mandatory. This study focused on the biodegradation of dimethyl phthalates (DMP), di-n-butyl phthalates (DBP), and di-n-octyl phthalates (DnOP) by Gordonia sp. in a batch system. Initially, five different concentrations of DBP, DMP, and DnOP (200–1000 mg/L) were chosen individually as the sole carbon source to examine their effect on the biodegradation and biomass growth of Gordonia sp. Complete degradation of DBP and DMP was achieved up to 1000 mg/L initial concentration within 96 h, whereas in case of DnOP, the degradation value was only 83.5% at 120 h for the same initial concentration. The experimental data were fitted into various substrate inhibition kinetic models, and accurate predicted values of degradation of all the three PAEs were obtained using the Tiesser model in comparison with other models, which yielded the highest and lowest R2 and SSE values of 0.99 and 0.02 × 10−4, respectively. In addition, the phytotoxicity of PAEs degraded samples was assessed and more than 50% germination index value was observed for DMP and DBP degraded sample which established the treatment efficiency of Gordonia sp. in degrading DMP and DBP. Hence, high DMP and DEP degradation and phytotoxicity removal efficiency of Gordonia sp. demonstrate its potential for the treatment of PAEs contaminated wastewater. |
| first_indexed | 2024-03-13T01:47:42Z |
| format | Article |
| id | doaj.art-8bc1f037eb104de49a312f66d6a72c9a |
| institution | Directory Open Access Journal |
| issn | 2165-5979 2165-5987 |
| language | English |
| last_indexed | 2024-03-13T01:47:42Z |
| publishDate | 2023-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Bioengineered |
| spelling | doaj.art-8bc1f037eb104de49a312f66d6a72c9a2023-07-03T06:33:42ZengTaylor & Francis GroupBioengineered2165-59792165-59872023-12-0114119521110.1080/21655979.2023.2229094Biodegradation of low, medium and high molecular weight phthalate by Gordonia sp. in a batch system: Kinetics and phytotoxicity analysesDipak Kumar Kanaujiya0Atharva More1Ajay Kumar Chhantyal2Rama Karn3Kannan Pakshirajan4Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, IndiaDepartment of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, IndiaDepartment of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, IndiaDepartment of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, IndiaDepartment of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, IndiaABSTRACTPhthalic acid esters (PAEs) are highly toxic compounds and can disrupt the hormonal balance of human, animal, and aquatic organisms. Due to the hazardous nature of such compounds, their removal from constituent wastewater before discharging into the environment is mandatory. This study focused on the biodegradation of dimethyl phthalates (DMP), di-n-butyl phthalates (DBP), and di-n-octyl phthalates (DnOP) by Gordonia sp. in a batch system. Initially, five different concentrations of DBP, DMP, and DnOP (200–1000 mg/L) were chosen individually as the sole carbon source to examine their effect on the biodegradation and biomass growth of Gordonia sp. Complete degradation of DBP and DMP was achieved up to 1000 mg/L initial concentration within 96 h, whereas in case of DnOP, the degradation value was only 83.5% at 120 h for the same initial concentration. The experimental data were fitted into various substrate inhibition kinetic models, and accurate predicted values of degradation of all the three PAEs were obtained using the Tiesser model in comparison with other models, which yielded the highest and lowest R2 and SSE values of 0.99 and 0.02 × 10−4, respectively. In addition, the phytotoxicity of PAEs degraded samples was assessed and more than 50% germination index value was observed for DMP and DBP degraded sample which established the treatment efficiency of Gordonia sp. in degrading DMP and DBP. Hence, high DMP and DEP degradation and phytotoxicity removal efficiency of Gordonia sp. demonstrate its potential for the treatment of PAEs contaminated wastewater.https://www.tandfonline.com/doi/10.1080/21655979.2023.2229094ChickpeaDimethyl phthalatesDi-n-butyl phthalatesDi-n-octyl phthalatesSubstrate inhibition |
| spellingShingle | Dipak Kumar Kanaujiya Atharva More Ajay Kumar Chhantyal Rama Karn Kannan Pakshirajan Biodegradation of low, medium and high molecular weight phthalate by Gordonia sp. in a batch system: Kinetics and phytotoxicity analyses Bioengineered Chickpea Dimethyl phthalates Di-n-butyl phthalates Di-n-octyl phthalates Substrate inhibition |
| title | Biodegradation of low, medium and high molecular weight phthalate by Gordonia sp. in a batch system: Kinetics and phytotoxicity analyses |
| title_full | Biodegradation of low, medium and high molecular weight phthalate by Gordonia sp. in a batch system: Kinetics and phytotoxicity analyses |
| title_fullStr | Biodegradation of low, medium and high molecular weight phthalate by Gordonia sp. in a batch system: Kinetics and phytotoxicity analyses |
| title_full_unstemmed | Biodegradation of low, medium and high molecular weight phthalate by Gordonia sp. in a batch system: Kinetics and phytotoxicity analyses |
| title_short | Biodegradation of low, medium and high molecular weight phthalate by Gordonia sp. in a batch system: Kinetics and phytotoxicity analyses |
| title_sort | biodegradation of low medium and high molecular weight phthalate by gordonia sp in a batch system kinetics and phytotoxicity analyses |
| topic | Chickpea Dimethyl phthalates Di-n-butyl phthalates Di-n-octyl phthalates Substrate inhibition |
| url | https://www.tandfonline.com/doi/10.1080/21655979.2023.2229094 |
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