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Co-metabolic Biotransformation of Bisphenol AF by a Bisphenol A-Growing Bacterial Enrichment Culture.
Environ Sci Technol
December 2024
State Key Laboratory of Organic Geochemistry, Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
The fluorinated bisphenol A (2,2-bis[4-hydroxyphenyl]propane, BPA) substitute bisphenol AF (BPAF) could be more persistent and toxic than BPA, but little is known about its environmental fate. In this study, we established a co-metabolic BPAF-degrading bacterial enrichment culture with BPA as the growth substrate. BPAF degradation by the enrichment culture was dependent on BPA, and BPAF could be eliminated to below the detection limit with successive additions of BPA.
View Article and Find Full Text PDFBiotic and abiotic removal of acetaminophen during sidestream partial nitritation processes: Underlying mechanisms and transformation pathways.
Sci Total Environ
January 2025
Facultad de Ciencias, Universidad Autónoma de San Luís Potosí, Av. Parque Chapultepec 1570, San Luis Potosi 78210, Mexico.
Article Synopsis
- Pharmaceutical residues in sidestream wastewater can harm ecosystems and human health, making their removal crucial.
- Research focused on how acetaminophen, a common drug, is degraded in this wastewater treatment process, finding that removal efficiency varies with nitrite and free nitrous acid (FNA) levels.
- The study revealed that a significant portion of acetaminophen was removed through both abiotic processes and bacterial metabolism, and optimal FNA levels are key for effectively eliminating such pharmaceuticals from wastewater.
Nondesulfurizing benzothiophene biotransformation to hetero and homodimeric ortho-substituted diaryl disulfides by the model PAH-degrading Sphingobium barthaii.
Biodegradation
June 2023
Department of Life and Environmental System Science, Graduate School of Nanobiosciences, Yokohama City University, 22-2 Seto, Kanazawa, Yokohama, Kanagawa, 236-0027, Japan.
Understanding the biotransformation mechanisms of toxic sulfur-containing polycyclic aromatic hydrocarbon (PASH) pollutants such as benzothiophene (BT) is useful for predicting their environmental fates. In the natural environment, nondesulfurizing hydrocarbon-degrading bacteria are major active contributors to PASH biodegradation at petroleum-contaminated sites; however, BT biotransformation pathways by this group of bacteria are less explored when compared to desulfurizing organisms. When a model nondesulfurizing polycyclic aromatic hydrocarbon-degrading soil bacterium, Sphingobium barthaii KK22, was investigated for its ability to cometabolically biotransform BT by quantitative and qualitative methods, BT was depleted from culture media but was biotransformed into mostly high molar mass (HMM) hetero and homodimeric ortho-substituted diaryl disulfides (diaryl disulfanes).
View Article and Find Full Text PDFFree Nitrous Acid Inhibits Atenolol Removal during the Sidestream Partial Nitritation Process through Regulating Microbial-Induced Metabolic Types.
Environ Sci Technol
August 2022
School of Civil and Environmental Engineering, Nanyang Technological University, 639798 Singapore.
Limited studies have attempted to evaluate pharmaceutical removal during the sidestream partial nitritation (PN) process. In this work, atenolol biodegradation by PN cultures was investigated by maintaining ammonium and pH at different levels. For the first time, free nitrous acid (FNA), other than ammonium, pH, and free ammonia, was demonstrated to inhibit atenolol removal, with biodegradation efficiencies of ∼98, ∼67, and ∼28% within 6 days at average FNA levels of 0, 0.
View Article and Find Full Text PDFCo-metabolic biodegradation of 4-bromophenol in a mixture of pollutants system by Arthrobacter chlorophenolicus A6.
Ecotoxicology
May 2022
Centre for Biotechnology, Siksha 'O'Anusandhan, Deemed to be University, Bhubaneswar, 751 030, Odisha, India.
Brominated phenols are listed as priority pollutants together with nitrophenol and chlorophenol are the key components of paper pulp wastewater. However, the biodegradation of bromophenol in a mixed substrate system is very scanty. In the present investigation, simultaneous biodegradation kinetics of three substituted phenols 4-bromophenol (4-BP), 4-nitrophenol (4-NP), and 4-chlorophenol (4-CP) were investigated using Arthrobacter chlorophenolicus A6.
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