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Jampani M, Mateo-Sagasta J, Chandrasekar A, Fatta-Kassinos D, Graham DW, Gothwal R, Moodley A, Chadag VM, Wiberg D, Langan S. Fate and transport modelling for evaluating antibiotic resistance in aquatic environments: Current knowledge and research priorities. JOURNAL OF HAZARDOUS MATERIALS 2024; 461:132527. [PMID: 37788551 DOI: 10.1016/j.jhazmat.2023.132527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 08/03/2023] [Accepted: 09/09/2023] [Indexed: 10/05/2023]
Abstract
Antibiotics have revolutionised medicine in the last century and enabled the prevention of bacterial infections that were previously deemed untreatable. However, in parallel, bacteria have increasingly developed resistance to antibiotics through various mechanisms. When resistant bacteria find their way into terrestrial and aquatic environments, animal and human exposures increase, e.g., via polluted soil, food, and water, and health risks multiply. Understanding the fate and transport of antibiotic resistant bacteria (ARB) and the transfer mechanisms of antibiotic resistance genes (ARGs) in aquatic environments is critical for evaluating and mitigating the risks of resistant-induced infections. The conceptual understanding of sources and pathways of antibiotics, ARB, and ARGs from society to the water environments is essential for setting the scene and developing an appropriate framework for modelling. Various factors and processes associated with hydrology, ecology, and climate change can significantly affect the fate and transport of ARB and ARGs in natural environments. This article reviews current knowledge, research gaps, and priorities for developing water quality models to assess the fate and transport of ARB and ARGs. The paper also provides inputs on future research needs, especially the need for new predictive models to guide risk assessment on AR transmission and spread in aquatic environments.
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Affiliation(s)
- Mahesh Jampani
- International Water Management Institute (IWMI), Battaramulla, Colombo, Sri Lanka.
| | - Javier Mateo-Sagasta
- International Water Management Institute (IWMI), Battaramulla, Colombo, Sri Lanka
| | - Aparna Chandrasekar
- UFZ - Helmholtz Centre for Environmental Research, Department Computational Hydrosystems, Leipzig, Germany; Institute of Hydrobiology, Technische Universität Dresden, Dresden, Germany
| | - Despo Fatta-Kassinos
- Civil and Environmental Engineering Department and Nireas International Water Research Center, University of Cyprus, Nicosia, Cyprus
| | - David W Graham
- School of Engineering, Newcastle University, Newcastle Upon Tyne, United Kingdom
| | - Ritu Gothwal
- International Water Management Institute (IWMI), Battaramulla, Colombo, Sri Lanka
| | - Arshnee Moodley
- International Livestock Research Institute (ILRI), Nairobi, Kenya; Department of Veterinary and Animal Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | | | - David Wiberg
- International Water Management Institute (IWMI), Battaramulla, Colombo, Sri Lanka
| | - Simon Langan
- International Water Management Institute (IWMI), Battaramulla, Colombo, Sri Lanka
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Ning Z, Wang S, Guo C, Zhang M. The impact of environmental factors on the transport and survival of pathogens in agricultural soils from karst areas of Yunnan province, China: Laboratory column simulated leaching experiments. Front Microbiol 2023; 14:1143900. [PMID: 37007467 PMCID: PMC10060967 DOI: 10.3389/fmicb.2023.1143900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 02/22/2023] [Indexed: 03/18/2023] Open
Abstract
IntroductionGroundwater is considered the best candidate for drinking water supply in the karst area. The groundwater water resources, however, are vulnerable to pathogenic microorganism contamination because of the typically thin soil layers overlying aquifers and the high permeability of the aquifer host rock, resulting in short residence times and low natural attenuation capacities. Until now, little attention has been paid to the critical environmental factors affecting the pathogenic microorganism contamination in soil-groundwater systems in the karst area.MethodsIn the study, orthogonality column experiments with controlling ambient temperatures, pH values of inlet water, and soil porosities were carried out to investigate the transport and lifespan of pathogenic microorganisms in the leachate of agricultural soils in the karst area of Yunnan province, China. The pathogenic indicators, i.e., total bacteria count (TBC) and total coliforms count (TCC), and hydrochemical parameters, i.e., pH and permanganate index (CODMn) in the leaching water, were systematically monitored.Results and DiscussionThe results showed that bacteria including coliforms can survive for prolonged periods of time in karst soils. The soils overlying the karst rocks were unable to impede the bacteria from seeping into the groundwater. The soils, in turn, likely served as both reservoirs and incubators for pathogenic bacteria. The ambient temperature was the most predominant influential factor affecting both TBC and TCC. The bacteria concentrations were proportional to the temperature in the leachate. Therefore, more attention should be paid to temperature variations in protecting the water supply, particularly in the high-temperature period, such as during the summer months.
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Affiliation(s)
- Zhuo Ning
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, China
- Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Zhengding, China
| | - Shuaiwei Wang
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, China
- *Correspondence: Shuaiwei Wang,
| | - Caijuan Guo
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, China
| | - Min Zhang
- Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, China
- Key Laboratory of Groundwater Remediation of Hebei Province and China Geological Survey, Zhengding, China
- Min Zhang,
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Abstract
Microbial communities are complex living systems that populate the planet with diverse functions and are increasingly harnessed for practical human needs. To deepen the fundamental understanding of their organization and functioning as well as to facilitate their engineering for applications, mathematical modeling has played an increasingly important role. Agent-based models represent a class of powerful quantitative frameworks for investigating microbial communities because of their individualistic nature in describing cells, mechanistic characterization of molecular and cellular processes, and intrinsic ability to produce emergent system properties. This review presents a comprehensive overview of recent advances in agent-based modeling of microbial communities. It surveys the state-of-the-art algorithms employed to simulate intracellular biomolecular events, single-cell behaviors, intercellular interactions, and interactions between cells and their environments that collectively serve as the driving forces of community behaviors. It also highlights three lines of applications of agent-based modeling, namely, the elucidation of microbial range expansion and colony ecology, the design of synthetic gene circuits and microbial populations for desired behaviors, and the characterization of biofilm formation and dispersal. The review concludes with a discussion of existing challenges, including the computational cost of the modeling, and potential mitigation strategies.
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Affiliation(s)
- Karthik Nagarajan
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Congjian Ni
- Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Ting Lu
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.,Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.,Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.,Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.,National Center for Supercomputing Applications, Urbana, Illinois 61801, United States
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Jiang Y, Zhou S, Fei J, Qin Z, Yin X, Sun H, Sun Y. Transport of different microplastics in porous media: Effect of the adhesion of surfactants on microplastics. WATER RESEARCH 2022; 215:118262. [PMID: 35287061 DOI: 10.1016/j.watres.2022.118262] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 03/03/2022] [Accepted: 03/05/2022] [Indexed: 06/14/2023]
Abstract
The adhesion of surfactant molecules on the microplastics surface is affected by the surface structure of the microplastics. Little is known about the mobility of different microplastics in the medium under surfactants. In order to reveal the migration of different microplastics under the action of surfactants, the study selected five kinds of microplastics (polyethylene (PE), polypropylene (PP), polystyrene (PS), polytetrafluoroethylene (PTFE), polymethyl methacrylate (PMMA)) and two kinds of surfactants (cetyltrimethylammonium bromide, CTAB and sodium dodecyl benzene sulfonate, SDBS) as the research objects. The column experiment was used to explore the transport behavior of microplastics under different concentrations of surfactants and the convection dispersion model was used to simulate. The dynamic contact angle of the surfactant solution on the microplastics was measured and the adhesion work was calculated by the Young-Dupre equation to reveal the underlying mechanism of microplastics retention in the presence of surfactants. The results showed that the transport ability of microplastics followed the order of PTFE <PMMA <PS <PE <PP, and the mobility under high concentrations of surfactants was greater than that at low concentrations, which was mainly attributed to the difference in the adhesion of the surfactant on the surface of the microplastics, which lead to differences in the migration between the microplastics. When the microplastics were close to each other, if the reaction force of the electrostatic force was greater than the adhesion force of the surfactant molecules on the surface, the surfactant molecules would be separated from the microplastics and the stability of the microplastics would decrease. In addition, the migration ability of microplastics in anionic surfactants was weaker than that of cationic surfactants, because the osmotic and elastic repulsion produced by SDBS were weaker than CTAB. The research results were of great significance for understanding the environmental behavior of microplastics affected by surfactants, and objectively evaluating the transport and fate behavior of microplastics-surfactants in the environment.
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Affiliation(s)
- Yanji Jiang
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Shi Zhou
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Jiao Fei
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Zhiming Qin
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Xianqiang Yin
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling 712100, China.
| | - Huimin Sun
- College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling 712100, China
| | - Yuebing Sun
- Ministry of Agriculture and Rural Affairs of the People's Republic of China Tianjin, Agro-Environmental Protection Institute, 300191, China
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Chandrasekar A, Binder M, Liedl R, Berendonk T. Determining the impact of flow velocities on reactive processes associated with Enterococcus faecalis JH2-2. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 85:485-495. [PMID: 35050897 DOI: 10.2166/wst.2021.611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
This study focuses on the impact of infiltration rates on colloidal transport and reactive processes associated with Enterococcus faecalis JH2-2 using water-saturated sediment columns. The infiltration rates influence the physical transport of bacteria by controlling the mean flow velocity. This, in turn, impacts biological processes in pore water owing to the higher or lower residence time of the bacteria in the column. In the present study, continuous injection of E. faecalis (suspended in saline water with varying conditions of dissolved oxygen and nutrient concentrations) into a lab-scale sediment column was performed at flow velocities of 0.02 cm min-1 and 0.078 cm min-1, i.e., at residence times of 1-5 hours. The impact of residence times on reactive processes is significant for field scale setups. A process-based model with a first-order rate coefficient for each biological process was fitted for each obtained condition-specific dataset from the experimental observations (breakthrough curves). The coefficients were converted to a dimensionless form to facilitate the comparison of biological processes. These results indicate that the processes of attachment and growth were flow-dependent. The growth process in the absence of dissolved oxygen was the most dominant process, with a Damkoehler number of approximately 48.
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Affiliation(s)
- Aparna Chandrasekar
- Technische Universität Dresden, Institute of Hydrobiology, Zellescher Weg 40, Dresden 01217, Germany E-mail: ; Technische Universität Dresden, Institute of Groundwater Management, Bergstr.66, Dresden 01069, Germany
| | - Martin Binder
- Helmholtz-Centre for Environmental Research - UFZ, Department of Environmental Informatics, , Permoserstraße 15, Leipzig 04318, Germany; Technische Universität Bergakademie Freiberg, Institute of Geology, Section of Hydrogeology and Hydrochemistry, Gustav-Zeuner-Str. 12, Freiberg 09599 Germany
| | - Rudolf Liedl
- Technische Universität Dresden, Institute of Groundwater Management, Bergstr.66, Dresden 01069, Germany
| | - Thomas Berendonk
- Technische Universität Dresden, Institute of Hydrobiology, Zellescher Weg 40, Dresden 01217, Germany E-mail:
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