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Takács E, Wang J, Chu L, Tóth T, Kovács K, Bezsenyi A, Szabó L, Homlok R, Wojnárovits L. Elimination of oxacillin, its toxicity and antibacterial activity by using ionizing radiation. Chemosphere 2022; 286:131467. [PMID: 34346325 DOI: 10.1016/j.chemosphere.2021.131467] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 04/14/2021] [Revised: 07/04/2021] [Accepted: 07/06/2021] [Indexed: 06/13/2023]
Abstract
The chemical changes caused by electron beam and γ irradiations and the biochemical characteristics of degradation products of a frequently used antibiotic oxacillin were investigated and compared with those of cloxacillin by applying pulse radiolysis, chemical and biochemical oxygen demand, total organic carbon content, oxygen uptake rate, toxicity and antibacterial activity measurements. Oxacillin was found to be non-toxic, but poorly biodegradable by the mixed microbial population of the activated sludge of a wastewater treatment plant. Therefore, it can significantly contribute to the spread of β-lactam antibiotic resistant bacteria. However, the products formed by γ-irradiation were more easily biodegradable as they were utilized as nutrient source by the microbes of the activated sludge and the products did not show antibacterial activity. During irradiation treatment of aerated aqueous solutions mainly hydroxyl radicals induce the elimination of antimicrobial activity by making alterations at the bicyclic β-lactam part of these antibiotics. Since the β-lactam part is the same in oxacillin and cloxacillin, the biochemical characteristics of products of the two antibiotics are similar. The attack of hydrated electron takes place on the carbonyl groups. When the irradiation is made under anoxic conditions these reactions may also contribute considerably to alterations at the β-lactam part and thereby to the loss of antibacterial activity.
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Affiliation(s)
- Erzsébet Takács
- Radiation Chemistry Department, Institute for Energy Security and Environmental Safety, Centre for Energy Research, H-1121, Konkoly-Thege Miklós út 29-33, Budapest, Hungary.
| | - Jianlong Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, PR China
| | - Libing Chu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, PR China
| | - Tünde Tóth
- Radiation Chemistry Department, Institute for Energy Security and Environmental Safety, Centre for Energy Research, H-1121, Konkoly-Thege Miklós út 29-33, Budapest, Hungary; Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, H-1111, Szent Gellért Tér 4, Budapest, Hungary
| | - Krisztina Kovács
- Radiation Chemistry Department, Institute for Energy Security and Environmental Safety, Centre for Energy Research, H-1121, Konkoly-Thege Miklós út 29-33, Budapest, Hungary
| | - Anikó Bezsenyi
- Budapest Sewage Works Pte Ltd, H-1087, Asztalos Sándor út 4, Budapest, Hungary; Óbuda University, H-1034, Bécsi út 96b, Budapest, Hungary
| | - László Szabó
- Radiation Chemistry Department, Institute for Energy Security and Environmental Safety, Centre for Energy Research, H-1121, Konkoly-Thege Miklós út 29-33, Budapest, Hungary
| | - Renáta Homlok
- Radiation Chemistry Department, Institute for Energy Security and Environmental Safety, Centre for Energy Research, H-1121, Konkoly-Thege Miklós út 29-33, Budapest, Hungary
| | - László Wojnárovits
- Radiation Chemistry Department, Institute for Energy Security and Environmental Safety, Centre for Energy Research, H-1121, Konkoly-Thege Miklós út 29-33, Budapest, Hungary
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Bezsenyi A, Sági G, Makó M, Wojnárovits L, Takács E. The effect of hydrogen peroxide on the biochemical oxygen demand (BOD) values measured during ionizing radiation treatment of wastewater. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2021.109773] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Sági G, Bezsenyi A, Kovács K, Klátyik S, Darvas B, Székács A, Mohácsi-Farkas C, Takács E, Wojnárovits L. Radiolysis of sulfonamide antibiotics in aqueous solution: Degradation efficiency and assessment of antibacterial activity, toxicity and biodegradability of products. Sci Total Environ 2018; 622-623:1009-1015. [PMID: 29890571 DOI: 10.1016/j.scitotenv.2017.12.065] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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: 09/22/2017] [Revised: 11/28/2017] [Accepted: 12/05/2017] [Indexed: 06/08/2023]
Abstract
Numerous studies have been published on the radiolysis of sulfonamide antibiotic solutions but little effort has been made to monitor the biological properties of degradation products. A complex approach should also clarify the changes in antibacterial activity and biodegradability, besides the usual screening of toxicity. To fill this gap, the ionizing radiation induced degradation of four sulfonamide antibiotics was investigated in dilute aqueous solutions, with emphasis on the biological assessment of decomposition products. Complete removal of sulfonamides was achieved by a low absorbed dose (1.5kGy). 2-2.5kGy dose was needed to transform the persistent initial molecules to substances biodegradable in both river water and activated sludge. The ratio of the biological and chemical oxygen demand increased from <0.21 to at least 0.59, but values as high as 0.80 were also measured. It was demonstrated that antibacterial activity is due to the initial molecules, as it disappeared when the sulfamethoxazole concentration decreased below the minimal inhibitory concentration (30 μM). This means that the products have no antibacterial activity. Toxicity testing performed on test organisms from three different trophic levels and activated sludge evidenced that the toxicity depends both on the test organism and on the sulfonamide used. The degradation of initial molecules is not always enough to eliminate the environmental risk due to the toxic products formed e.g. inhibitory effects to Vibrio fischeri increased by 34% at 2.5kGy. For this reason, complex biological assessment of treated solutions has to play an important role in development and optimization of advanced treatment techniques.
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Affiliation(s)
- Gyuri Sági
- Institute for Energy Security and Environmental Safety, Centre for Energy Research, Hungarian Academy of Sciences, H-1121, Konkoly-Thege Miklós út 29-33, Budapest, Hungary.
| | - Anikó Bezsenyi
- Budapest Sewage Works Pte Ltd., South-Pest Wastewater Treatment Plant, H-1238, Meddőhányó utca 1, Budapest, Hungary
| | - Krisztina Kovács
- Institute for Energy Security and Environmental Safety, Centre for Energy Research, Hungarian Academy of Sciences, H-1121, Konkoly-Thege Miklós út 29-33, Budapest, Hungary
| | - Szandra Klátyik
- Agro-Environmental Research Institute, National Research and Innovation Centre, H-1022, Herman Ottó utca 15, Budapest, Hungary
| | - Béla Darvas
- Agro-Environmental Research Institute, National Research and Innovation Centre, H-1022, Herman Ottó utca 15, Budapest, Hungary
| | - András Székács
- Agro-Environmental Research Institute, National Research and Innovation Centre, H-1022, Herman Ottó utca 15, Budapest, Hungary
| | - Csilla Mohácsi-Farkas
- Department of Microbiology and Biotechnology, Szent István University, H-1118, Somlói út, 14-16 Budapest, Hungary
| | - Erzsébet Takács
- Institute for Energy Security and Environmental Safety, Centre for Energy Research, Hungarian Academy of Sciences, H-1121, Konkoly-Thege Miklós út 29-33, Budapest, Hungary
| | - László Wojnárovits
- Institute for Energy Security and Environmental Safety, Centre for Energy Research, Hungarian Academy of Sciences, H-1121, Konkoly-Thege Miklós út 29-33, Budapest, Hungary
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Sági G, Bezsenyi A, Kovács K, Klátyik S, Darvas B, Székács A, Wojnárovits L, Takács E. The impact of H 2 O 2 and the role of mineralization in biodegradation or ecotoxicity assessment of advanced oxidation processes. Radiat Phys Chem Oxf Engl 1993 2018. [DOI: 10.1016/j.radphyschem.2017.09.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Sági G, Kovács K, Bezsenyi A, Csay T, Takács E, Wojnárovits L. Enhancing the biological degradability of sulfamethoxazole by ionizing radiation treatment in aqueous solution. Radiat Phys Chem Oxf Engl 1993 2016. [DOI: 10.1016/j.radphyschem.2016.02.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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