Article
Engineering, Environmental
Monica E. McFadden, Keith P. Reber, John D. Sivey, David M. Cwiertny, Gregory H. LeFevre
Summary: Microbial biotransformation of benoxacor and dichlormid primarily occurs via cometabolism, leading to the formation of novel products including monochlorinated species, glutathione conjugates, and sulfur-containing species. Dechlorination followed by conjugation with glutathione is proposed as the main transformation pathway.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
Article
Engineering, Environmental
Li-Jun Zhou, Ping Han, Mengyue Zhao, Yaochun Yu, Dongyao Sun, Lijun Hou, Min Liu, Qiang Zhao, Xiufeng Tang, Uli Kluemper, Ji-Dong Gu, Yujie Men, Qinglong L. Wu
Summary: This study evaluated the biotransformation mechanisms of different ammonia-oxidizing microorganisms on lincomycin and three fluoro-quinolone antibiotics, finding that ammonia-oxidizing archaea showed the best biotransformation capability for these antibiotics.
Article
Engineering, Environmental
Hiep T. Nguyen, Tien H. Du, Jin Gi Hong, Seungdae Oh
Summary: This study revealed the key role of cometabolic breakdown in activated sludge microbiomes in efficiently removing and detoxifying oxytetracycline (OTC) and its derivatives. An AS bioreactor achieved an OTC removal efficiency of 94-97% through cometabolic biotransformation. The study proposed a novel biotransformation pathway for OTC and identified bacterial populations involved in cometabolic and direct metabolic transformation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Natthariga Laothamteep, Hibiki Kawano, Felipe Vejarano, Chiho Suzuki-Minakuchi, Masaki Shintani, Hideaki Nojiri, Onruthai Pinyakong
Summary: The study demonstrated that synergistic interactions among bacterial members of the consortium OPK promoted the simultaneous degradation of two high molecular weight polycyclic aromatic hydrocarbons. Key degraders and degradation enzyme genes were identified in the process.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Environmental
Weimin Wang, Heng Zhang, Changsheng Guo, Wenxiu Liu, Jian Xu
Summary: The stereoselective biotransformation of methamphetamine (METH) during wastewater treatment processes was investigated, and it was found that the biotransformation favored S-(+)-METH over R-(-)-METH. In controlled laboratory experiments, it was observed that the transformation of S-(+)-METH occurred simultaneously with the biodegradation of COD and NH4+-N, indicating its cometabolism nature. Enzymes released under microbial starvation stress stimulated the biotransformation of R-(-)-METH. The presence of dissolved oxygen led to a higher biotransformation rate of METH under aerobic conditions.
Review
Environmental Sciences
Niwas Kumar, Pratyoosh Shukla
Summary: Emerging contaminants (ECs) are a global issue due to their toxicity, impacts on human health, and potential role in antimicrobial resistance. Current wastewater treatment systems are not effective in removing ECs, but microalgae-based processes offer cost and energy-efficient solutions. Microalgae can transform ECs into less toxic compounds, and the resulting microalgal biomass can be used for biofuel production.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Chengyi Luo, Xin Hu, Mutai Bao, Xiaojun Sun, Fengshu Li, Yiming Li, Wenxiu Liu, Yan Yang
Summary: Phenanthrene (PHE) is a widely distributed substance that can cause genotoxicity in humans by interacting with enzymes in the body. The inhibitory effect of biotoxic intermediates on bacterial growth is a challenge for PHE bioremediation. In this study, a new PHE-degrading strain was isolated and identified, and the addition of sophorolipids was found to accelerate the degradation process and alleviate the biotoxic effects.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Environmental
Ping Han, Ana B. Rios-Miguel, Xiufeng Tang, Yaochun Yu, Li-Jun Zhou, Lijun Hou, Min Liu, Dongyao Sun, Mike S. M. Jetten, Cornelia U. Welte, Yujie Men, Sebastian Lucker
Summary: This study investigated the metabolic capacity of comammox Nitrospira inopinata and Nitrospira kreftii to transform benzimidazole fungicides. The comammox bacteria were found to actively transform all the tested fungicides, except for thiabendazole. The identified transformation products suggested hydroxylation, S-oxidation, and glycosylation as the major biotransformation pathways.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Multidisciplinary Sciences
Alexandre Fromain, Jose Efrain Perez, Aurore van de Walle, Yoann Lalatonne, Claire Wilhelm
Summary: This study demonstrates that photothermia at the nanoscale can trigger the degradation of magnetic nanoparticles, leading to the release of Fe(II) and enabling photothermo-ferroptotic therapy. The temperature acts as an accelerator for nanoparticle degradation and can be remotely triggered by laser-mediated photothermal conversion. The efficacy of this treatment method has been confirmed in in vitro experiments.
NATURE COMMUNICATIONS
(2023)
Article
Environmental Sciences
Huaihao Xu, Yuepeng Deng, Mingji Li, Kaoming Zhang, Jie Zou, Yunhua Yang, Peng Shi, Yiping Feng, Chun Hu, Zhu Wang
Summary: This study investigated the removal of tetracycline (TC) in three parallel lab-scale nitrification MBRs with different ammonium loading rates (ALRs) at four different concentrations. The results showed that high TC removal efficiency (90.46%) was achieved in the MBR with the highest ALR (AN1000) at an influent TC concentration of 50 mg/L. Higher ALRs promoted TC removal at lower influent TC concentrations, while no significant difference was observed at higher influent TC concentrations, suggesting that heterotrophic degradation could be strengthened after long-term exposure to high TC concentration.
ENVIRONMENTAL POLLUTION
(2023)
Article
Biotechnology & Applied Microbiology
Xi Tang, Yi-Fan Cai, Xiao-Mei Yu, Wen-Wen Zhou
Summary: This study screened and identified a bacterial strain capable of efficiently detoxifying aflatoxin B1. The strain, designated as DT and highly homologous to Bacillus aryabhattai, showed a high removal ratio of AFB1 under optimal conditions. The detoxified products exhibited reduced toxicity compared to AFB1, and mass spectrometry analysis suggested a potential biotransformation pathway.
JOURNAL OF APPLIED MICROBIOLOGY
(2023)
Article
Environmental Sciences
Yifeng Xu, Ying Gu, Lai Peng, Ning Wang, Shi Chen, Chuanzhou Liang, Yiwen Liu, Bing-Jie Ni
Summary: Although moving bed biofilm reactors (MBBRs) have shown excellent antibiotic removal potentials, the mechanisms underlying this process are still not well understood. This study investigated the removal of ciprofloxacin in an enriched nitrifying MBBR, revealing the significant contributions of biomass adsorption and microbial-induced biodegradation. The results showed that the presence of ammonium enhanced the biodegradation rate through ammonia oxidizing bacteria (AOB)-induced cometabolism, while heterotrophs played a minor role in ciprofloxacin biodegradation. The findings suggest the feasibility of nitrifying biofilm systems for efficient antibiotic removal from wastewater.
Review
Environmental Sciences
Basak Kilic, Ferhan Cecen
Summary: This study reviewed experimental data on the biodegradation of 16 pharmaceuticals in activated sludge and used BIOWIN models to calculate the theoretical biodegradation of these pharmaceuticals. The aim was to compare and contrast the experimental data and theoretical calculations. The results showed discrepancies between the two, indicating that the BIOWIN estimations may not accurately represent the biodegradability of certain pharmaceuticals. The study also highlighted the importance of considering different removal mechanisms for accurate biodegradability estimation under real conditions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Biochemistry & Molecular Biology
V. Vishnu Priyan, Nitesh Kumar, Harish Kumar Rajendran, Jyotiprakash Ray, Selvaraju Narayanasamy
Summary: This study successfully removed IBU from aqueous solutions using a CMC/PPY composite and conducted toxicity assessment. The results demonstrate the high removal efficiency and reduced toxicity of the composite material.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Engineering, Environmental
Lorena Gonzalez-Gil, Eduardo Fernandez-Fontaina, Randolph R. Singh, Juan M. Lema, Marta Carballa, Diana S. Aga
Summary: This study investigates the role of heterotrophic and nitrifying microorganisms in the biotransformation of pharmaceutically active compounds, showing that the activity of nitrifying sludge is influenced by both sludge retention time and feeding composition. Nitrifiers and slow-growing heterotrophs present in the nitrifying sludge play a significant role in the co-metabolic biotransformation of certain compounds.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Daria Chlebek, Tomasz Plociniczak, Sara Gobetti, Agata Kumor, Katarzyna Hupert-Kocurek, Magdalena Pacwa-Plociniczak
Summary: This study investigated the plant growth promotion, hydrocarbon degradation, and heavy metal resistance of the Pseudomonas qingdaonensis ZCR6 strain isolated from co-contaminated soil. The in vitro bioassays confirmed its ability to produce indole acetic acid (IAA), siderophores, and ammonia, as well as its capacity for solubilizing phosphate and cellulase activity. The strain also exhibited high activity of 1-aminocyclopropane-1-carboxylic acid deaminase and degradation of petroleum hydrocarbons. Genome analysis revealed the presence of genes associated with various important functions such as nitrogen fixation, phosphate solubilization, heavy metal resistance, and organic compound degradation. The results suggest that ZCR6 has potential for phytoremediation of co-contaminated soils.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Review
Agricultural Engineering
Anna Dzionek, Danuta Wojcieszynska, Urszula Guzik
Summary: Xanthan gum, a exo-polysaccharide produced by bacteria, possesses unique non-Newtonian properties whose structure and conformation are greatly influenced by fermentation conditions, temperature, and ion concentration. While the crosslinked form of xanthan gum has shown potential in controlled drug delivery and improving survival rate of immobilized bacteria, current crosslinking procedures often involve toxic substances or harsh environmental conditions, limiting their use in live cell entrapment. This study summarizes a potentially less toxic crosslinking method and explores the utilization of xanthan gum in bioremediation studies and methods to prevent carrier accumulation in the environment.
BIORESOURCE TECHNOLOGY
(2022)
Review
Environmental Sciences
Danuta Wojcieszynska, Henryk Guzik, Urszula Guzik
Summary: Since 2019, the world has been greatly influenced by the successive waves of the COVID-19 pandemic. During this time, researchers have made discoveries about the structure, action, short- and long-term effects of the virus, and have developed treatments. While the pandemic has undoubtedly impacted people's lives, there is also growing attention on its effects on the environment. This review analyzed the use of non-steroidal anti-inflammatory drugs (NSAIDs) for treating SARS-CoV-2 symptoms, their effects on the human body and aquatic organisms, and their presence in the environment. The findings highlight the need for further research and report on the environmental impact of NSAIDs during the pandemic.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Andrzej Woznica, Jerzy Karczewski, Czeslaw Klis, Jacek Dlugosz, Przemyslaw Ziemski, Agnieszka Nowak, Tytus Bernas
Summary: This study constructs a multiparameter model to describe the kinetics of a water toxicity sensor and the relationship between signal-to-noise ratio and temperature, pH, oxygen and ammonium concentration. The model demonstrates the performance of ABTOW under non-equilibrium conditions.
Article
Engineering, Civil
Dominika Dabrowska, Agnieszka Nowak, Marek Soltysiak, Paulina Biniecka, Vahid Nourani, Daniel Wasilkowski
Summary: This article presents an interdisciplinary lysimeter experiment that used hydrogeological, biochemical, and microbiological studies to evaluate the process of leaching pollutants from waste. The results of leachate tests indicate poor water quality with high EC value, and high concentrations of chlorides and sulphates. Microbiological tests confirm the seasonality, showing significant differences in heterotrophic bacteria numbers between autumn and winter. The analysis of nitrogen and phosphorus sources utilization revealed seasonal differences. Lysimeter studies play a valuable role in construction of landfills and limiting microbial growth.
JOURNAL OF HYDROLOGY
(2022)
Article
Environmental Sciences
Agnieszka Nowak, Daniel Wasilkowski, Agnieszka Mrozik
Summary: This study investigated the growth and degradation potential of Stenotrophomonas maltophilia KB2 and Pseudomonas moorei KB4 strains towards phenol under suboptimal conditions. The results showed that the degradation time of phenol by both strains varied under different temperatures, pH levels, and salinity, and this degradation ability was related to the activity of catechol dioxygenases and membrane permeability.
Article
Biochemistry & Molecular Biology
Daria Chlebek, Valeriia Grebtsova, Artur Pinski, Joanna Zur-Pinska, Katarzyna Hupert-Kocurek
Summary: This study identified the biocontrol potential of the endophytic bacterium Serratia quinivorans KP32, isolated from the roots of Petroselinum crispum L., against fungal phytopathogens. The KP32 strain exhibited inhibitory activity against various phytopathogens and the production of lytic enzymes, siderophores, and other compounds contributed to its biocontrol capabilities. Additionally, the strain showed effective plant colonization abilities, making it a potential candidate for use as a biopesticide and plant growth promoter.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biochemistry & Molecular Biology
Ariel Marchlewicz, Urszula Guzik, Katarzyna Hupert-Kocurek, Danuta Wojcieszynska
Summary: In order to decompose non-steroidal anti-inflammatory drugs in wastewater, a bacterial consortium with a defined composition and boundary conditions was developed. The consortium showed resistance to toxic compounds and exhibited degradation rates for different drugs. It can be tested in real activated sludge conditions.
Review
Chemistry, Physical
Danuta Wojcieszynska, Karolina Lagoda, Urszula Guzik
Summary: Diclofenac is a widely used non-steroidal anti-inflammatory drug that is not completely degraded in sewage treatment plants, leading to its presence in surface waters and potential harm to non-target organisms. This paper discusses the pathways of microbiological degradation of diclofenac and modern systems of biocatalyst immobilisation, with a focus on laccases involved in its biotransformation.
Article
Biochemistry & Molecular Biology
Danuta Wojcieszynska, Judyta Klamka, Ariel Marchlewicz, Izabela Potocka, Joanna Zur-Pinska, Urszula Guzik
Summary: In this study, a plant sponge from Luffa cylindrica was used as a carrier for the immobilization of Stenotrophomonas maltophilia KB2 strain. The optimal conditions for immobilization were determined, and the immobilized strain showed potential for bioremediation processes.
