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Han J, Xu Y, Xu D, Niu Y, Li L, Li F, Li Z, Wang H. Mechanism of downward migration of quinolone antibiotics in antibiotics polluted natural soil replenishment water and its effect on soil microorganisms. ENVIRONMENTAL RESEARCH 2023; 218:115032. [PMID: 36502909 DOI: 10.1016/j.envres.2022.115032] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 12/06/2022] [Accepted: 12/07/2022] [Indexed: 06/17/2023]
Abstract
Reclaimed water is widely concerned as an effective recharge of groundwater and surface water, but trace organic pollutants produced by traditional wastewater treatment plants (WWTPs) would cause environmental pollution (water and soil) during infiltration. Therefore, the effects of reclaimed water containing ofloxacin (OFL) and ciprofloxacin (CIP) in antibiotics polluted natural soil (APNS) were investigated by simulating soil aquifer treatment systems (SATs). The experiment results showed that OFL and CIP in water were adsorbed and microbially degraded mainly at 30 cm, and the concentration of OFL and CIP in soil increased with depth, which were mainly due to the desorption from APNS. Concurrently, the change in replenishment water concentration also significantly affected OFL and CIP in pore water and soil. Although OFL and CIP inhibited the diversity of soil microbial community, they also promoted the growth of some microorganisms. As the dominant bacteria, Proteobacteria and Acidobacteriota can effectively participate in the degradation of OFL and CIP. The degradation effects of soil microorganisms on OFL and CIP were 45.48% and 42.39%, respectively, indicating that soil microorganisms selectively degraded pollutants. This experiment was carried out on APNS, which provided a reference for future studies on the migration of trace organic pollutants under natural conditions.
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Affiliation(s)
- Jinlong Han
- Tangshan Key Laboratory of Bioelectrochemical Water Pollution Control Technology, North China University of Science and Technology, Tangshan, 063210, PR China; Beijing Institute of Water Science and Technology, Beijing, 100048, PR China; School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, PR China
| | - Yufei Xu
- Tangshan Key Laboratory of Bioelectrochemical Water Pollution Control Technology, North China University of Science and Technology, Tangshan, 063210, PR China
| | - Duo Xu
- Tangshan Key Laboratory of Bioelectrochemical Water Pollution Control Technology, North China University of Science and Technology, Tangshan, 063210, PR China
| | - Yunxia Niu
- Tangshan Key Laboratory of Bioelectrochemical Water Pollution Control Technology, North China University of Science and Technology, Tangshan, 063210, PR China; Hebei Mining Area Ecological Restoration Industry Technology Research Institute Tangshan, 063000, PR China
| | - Lei Li
- Beijing Institute of Water Science and Technology, Beijing, 100048, PR China
| | - Fuping Li
- Hebei Mining Area Ecological Restoration Industry Technology Research Institute Tangshan, 063000, PR China
| | - Zhaoxin Li
- Beijing Institute of Water Science and Technology, Beijing, 100048, PR China; School of Water Conservancy and Hydroelectric Power, Hebei University of Engineering, Handan, 056038, PR China.
| | - Hao Wang
- Tangshan Key Laboratory of Bioelectrochemical Water Pollution Control Technology, North China University of Science and Technology, Tangshan, 063210, PR China; Hebei Mining Area Ecological Restoration Industry Technology Research Institute Tangshan, 063000, PR China.
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Carbon-Based Materials as Effective Adsorbents for the Removal of Pharmaceutical Compounds from Aqueous Solution. ADSORPT SCI TECHNOL 2022. [DOI: 10.1155/2022/3079663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Antibiotics are emerging water pollutants that have attracted significant attention from the scientific community. Antibiotics are generally released via hospital effluents, industrial production waste, animal manure, and irrigated agricultural land. Antibiotic residues can harm all living organisms, with the most detrimental consequence being the generation of antibiotic-resistant microorganisms, commonly known as “superbugs.” Antimicrobial resistance is a concern to the healthcare community as it complicates the treatment of infections. Thus, the development of effective and economical technologies to remove antibiotics from the environment is necessary. Adsorption is a promising technology owing to its effectiveness and high operational feasibility, and carbon-based adsorbents are primitive materials that are particularly suited for antibiotic adsorption. Herein, an overview of the current state of antibiotic pollution will be summarised, including the adverse effects of different antibiotics and challenges associated with antibiotic removal. The adsorption behaviours of tetracycline (TC), quinolone, penicillin, and macrolides on carbon-based adsorbents (i.e., activated carbon, carbon nanotubes, and graphene-based materials) are reviewed. The interactions between antibiotics and carbon-based adsorbents, adsorption mechanism, and adsorption behaviour under different conditions are emphasised. In addition, the limitations of adsorption technology are highlighted to direct future research.
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Ribeirinho-Soares S, Moreira NFF, Graça C, Pereira MFR, Silva AMT, Nunes OC. Overgrowth control of potentially hazardous bacteria during storage of ozone treated wastewater through natural competition. WATER RESEARCH 2022; 209:117932. [PMID: 34902759 DOI: 10.1016/j.watres.2021.117932] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 11/10/2021] [Accepted: 12/01/2021] [Indexed: 06/14/2023]
Abstract
Improving the chemical and biological quality of treated wastewater is particularly important in world regions under water stress. In these regions, reutilization of wastewater is seen as an alternative to reduce water demand, particularly for agriculture irrigation. In a reuse scenario, the treated wastewater must have enough quality to avoid chemical and biological contamination of the receiving environment. Ozonation is among the technologies available to efficiently remove organic micropollutants and disinfect secondary effluents, being implemented in full-scale urban wastewater treatment plants worldwide. However, previous studies demonstrated that storage of ozone treated wastewater promoted the overgrowth of potentially harmful bacteria, putting at risk its reutilization, given for instance the possibility of contaminating the food-chain. Therefore, this study was designed to assess the potential beneficial role of inoculation of ozone treated wastewater with a diverse bacterial community during storage, for the control of the overgrowth of potentially hazardous bacteria, through bacterial competition. To achieve this goal, ozone treated wastewater (TWW) was diluted with river water (RW) in the same proportion, and the resulting bacterial community (RW+TWW) was compared to that of undiluted TWW over 7 days storage. As hypothesized, in contrast to TWW, where dominance of Beta- and Gammaproteobacteria, namely Pseudomonas spp. and Acinetobacter spp., was observed upon storage for 7 days, the bacterial communities of the diluted samples (RW+TWW) were diverse, resembling those of RW. Moreover, given the high abundance of antibiotic resistance genes in RW, the concentration of these genes in RW+TWW did not differ from that of the non-ozonated controls (WW, RW and RW+WW) over the storage period. These results highlight the necessity of finding a suitable pristine diverse bacterial community to be used in the future to compete with bacteria surviving ozonation, to prevent reactivation of undesirable bacteria during storage of treated wastewater.
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Affiliation(s)
- Sara Ribeirinho-Soares
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal
| | - Nuno F F Moreira
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal; Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal
| | - Cátia Graça
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal
| | - M Fernando R Pereira
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal
| | - Adrián M T Silva
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal
| | - Olga C Nunes
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal.
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Danner MC, Robertson A, Behrends V, Reiss J. Antibiotic pollution in surface fresh waters: Occurrence and effects. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 664:793-804. [PMID: 30763859 DOI: 10.1016/j.scitotenv.2019.01.406] [Citation(s) in RCA: 416] [Impact Index Per Article: 83.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 01/25/2019] [Accepted: 01/30/2019] [Indexed: 05/25/2023]
Abstract
Worldwide, antibiotic usage exceeds 100,000 tons per year and there is increasing concern over the fate of these substances. Antibiotics are ubiquitous in the environment and significant concentrations have been detected in fresh waters. In this review, we highlight important aspects of antibiotic pollution in fresh waters: that concentrations of antibiotics in the environment are substantial, that micro-organisms are susceptible to this, that bacteria can evolve resistance in the environment, and that antibiotic pollution affects natural food webs while interacting with other stressors; which taken together poses a number of challenges for environmental scientists. In the literature, we found examples of considerable antibiotic pollution in fresh waters. In the Americas, antibiotic concentrations of up to 15 μg/L have been measured; with higher concentrations reported from European and African studies (over 10 μg/L and 50 μg/L respectively), and in Asian-pacific countries concentrations over 450 μg/L have been detected. While these concentrations might not be deemed harmful to humans, non-target freshwater organisms could be affected by them. Bioassays show that some of the antibiotics found in surface waters affect microbes at concentrations below 10 μg/L. Among the most potent antibiotics are those that prevail in streams and rivers in these concentrations, such as ciprofloxacin. Sub-lethal concentrations might not kill prokaryotes but contribute to increased bacterial resistance and change the composition of single-celled communities, as demonstrated in laboratory experiments. This has implications for the microbial food web (e.g. interactions among and between bacteria and their protozoan consumers) and by extension, larger organisms and ecosystem health. The fact that the effects of antibiotics are extremely context-dependent represents a challenge, particularly for in vitro research. We suggest future research avenues, taking into account food web experiments, antibiotics interacting with one another (and other stressors) and discuss how these can help to answer multi-layered research questions.
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Affiliation(s)
- Marie-Claire Danner
- Department of Life Sciences, Whitelands College, Roehampton University, London SW15 4JD, United Kingdom.
| | - Anne Robertson
- Department of Life Sciences, Whitelands College, Roehampton University, London SW15 4JD, United Kingdom
| | - Volker Behrends
- Department of Life Sciences, Whitelands College, Roehampton University, London SW15 4JD, United Kingdom
| | - Julia Reiss
- Department of Life Sciences, Whitelands College, Roehampton University, London SW15 4JD, United Kingdom
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Maloney EM. How do we take the pulse of an aquatic ecosystem? Current and historical approaches to measuring ecosystem integrity. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2019; 38:289-301. [PMID: 30387526 DOI: 10.1002/etc.4308] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 05/23/2018] [Accepted: 10/31/2018] [Indexed: 06/08/2023]
Abstract
Global environmental monitoring has indicated that the structure and function of some aquatic ecosystems has been significantly altered by human activities. There are many potential causes for these changes; however, one major concern is the increasing release of anthropogenic contaminants into aquatic environments. Although toxicological responses of individual organisms are typically well characterized, few studies have focused on characterizing toxicity at the ecosystem level. In fact, because of their scale and complexity, changes in ecosystem integrity are rarely considered in assessments of risks to ecosystems. This work attempts to move the conversation forward by defining integrity of ecosystems, reviewing current and historical approaches to measuring ecosystem integrity status (e.g., structural and functional measurements), and highlighting methods that could significantly contribute to the field of ecosystem toxicology (e.g., keystone species, environmental energetics, ecotoxicological modeling, and adverse outcome pathways [AOPs]). Through a critical analysis of current and historical methodologies, the present study offers a comprehensive, conceptual framework for the assessment of risks of contaminant exposure for whole ecosystems and proposes steps to facilitate better diagnoses of the integrity of aquatic systems. Environ Toxicol Chem 2019;38:289-301. © 2018 SETAC.
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Affiliation(s)
- Erin M Maloney
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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7
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González-Alonso S, Merino LM, Esteban S, López de Alda M, Barceló D, Durán JJ, López-Martínez J, Aceña J, Pérez S, Mastroianni N, Silva A, Catalá M, Valcárcel Y. Occurrence of pharmaceutical, recreational and psychotropic drug residues in surface water on the northern Antarctic Peninsula region. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 229:241-254. [PMID: 28599208 DOI: 10.1016/j.envpol.2017.05.060] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 05/15/2017] [Accepted: 05/22/2017] [Indexed: 06/07/2023]
Abstract
Human presence in the Antarctic is increasing due to research activities and the rise in tourism. These activities contribute a number of potentially hazardous substances. The aim of this study is to conduct the first characterisation of the pharmaceuticals and recreational drugs present in the northern Antarctic Peninsula region, and to assess the potential environmental risk they pose to the environment. The study consisted of a single sampling of ten water samples from different sources, including streams, ponds, glacier drains, and a wastewater discharge into the sea. Twenty-five selected pharmaceuticals and 21 recreational drugs were analysed. The highest concentrations were found for the analgesics acetaminophen (48.74 μg L-1), diclofenac (15.09 μg L-1) and ibuprofen (10.05 μg L-1), and for the stimulant caffeine (71.33 μg L-1). All these substances were detected in waters that were discharged directly into the ocean without any prior purification processes. The hazard quotient (HQ) values for ibuprofen, diclofenac and acetaminophen were far in excess of 10 at several sampling points. The concentrations of each substance measured and used as measured environmental concentration values for the HQ calculations are based on a one-time sampling. The Toxic Unit values indicate that analgesics and anti-inflammatories are the therapeutic group responsible for the highest toxic burden. This study is the first to analyse a wide range of substances and to determine the presence of pharmaceuticals and psychotropic drugs in the Antarctic Peninsula region. We believe it can serve as a starting point to focus attention on the need for continued environmental monitoring of these substances in the water cycle, especially in protected regions such as the Antarctic. This will determine whether pharmaceuticals and recreational drugs are hazardous to the environment and, if so, can be used as the basis for risk-assessment studies to prioritise the exposure to risk.
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Affiliation(s)
- Silvia González-Alonso
- Research Group and Teaching in Environmental Toxicology and Risk Assessment (TAyER) of Rey Juan Carlos University, Avda. Atenas S/N, E-28922 Alcorcón, Madrid, Spain.
| | - Luis Moreno Merino
- Geological Survery of Spain, (IGME), C/Ríos Rosas 23, 28003 Madrid, Spain
| | - Sara Esteban
- Research Group and Teaching in Environmental Toxicology and Risk Assessment (TAyER) of Rey Juan Carlos University, Avda. Atenas S/N, E-28922 Alcorcón, Madrid, Spain
| | - Miren López de Alda
- Water and Soil Quality Research Group, Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/ Jordi Girona, 18-26, 08034 Barcelona, Spain
| | - Damià Barceló
- Water and Soil Quality Research Group, Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/ Jordi Girona, 18-26, 08034 Barcelona, Spain; Catalan Institute for Water Research (ICRA), Parc Científic i Tecnològic de la Universitat de Girona, Edifici H(2)O, Emili Grahit 101, 17003 Girona, Spain
| | - Juan José Durán
- Geological Survery of Spain, (IGME), C/Ríos Rosas 23, 28003 Madrid, Spain
| | - Jerónimo López-Martínez
- Department of Geology and Geochemistry, Faculty of Sciences, University Autónoma de Madrid, 28049 Madrid, Spain
| | - Jaume Aceña
- Water and Soil Quality Research Group, Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/ Jordi Girona, 18-26, 08034 Barcelona, Spain
| | - Sandra Pérez
- Water and Soil Quality Research Group, Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/ Jordi Girona, 18-26, 08034 Barcelona, Spain
| | - Nicola Mastroianni
- Water and Soil Quality Research Group, Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/ Jordi Girona, 18-26, 08034 Barcelona, Spain
| | - Adrián Silva
- National Institute of Water, Empalme J. Newbery km 1,620, Ezeiza, Buenos Aires, Argentina
| | - Myriam Catalá
- Department of Biology & Geology, Physics and Inorganic Chemistry, Higher School of Science and Technology (ESCET), Rey Juan Carlos University, Tulipán s/n, E-28933 Móstoles, Madrid, Spain
| | - Yolanda Valcárcel
- Research Group and Teaching in Environmental Toxicology and Risk Assessment (TAyER) of Rey Juan Carlos University, Avda. Atenas S/N, E-28922 Alcorcón, Madrid, Spain; Department of Medicine and Surgery, Psychology, Preventive Medicine and Public Health and Medical Microbiology and Immunology, Rey Juan Carlos University, Avda. Atenas s/n, E-28922 Alcorcón, Madrid, Spain.
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Jain K, Saini S. MarRA, SoxSR, and Rob encode a signal dependent regulatory network in Escherichia coli. MOLECULAR BIOSYSTEMS 2017; 12:1901-12. [PMID: 27098660 DOI: 10.1039/c6mb00263c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
When exposed to low concentrations of toxic chemicals, bacteria modulate the expression of a number of cellular processes. Typically, these processes include those related to porin production, dismutases, and metabolic fluxes. In Escherichia coli (E. coli), the expression of these systems is largely controlled by three homologous transcriptional regulators: MarA, SoxS, and Rob. Each of the three regulators responds to distinct chemical signals (salicylate for MarA; paraquat for SoxS; and bipyridyl for Rob) and controls the expression of an overlapping set of downstream targets. In addition, the three systems autoregulate their own expression, and cross-regulate each other's expression. Specifically, MarA is known to activate SoxS expression, and Rob is known to activate MarA expression. In addition, a number of conflicting regulatory interactions are known to exist between the three loci. Thus, the three systems encode a complex regulatory topology with multiple feedback loops, the precise nature of whose interactions or their significance in cellular physiology is not well understood currently. In this work, we focus on understanding the details of this crosstalk between the Mar-Sox-Rob systems in E. coli, and the resulting control and dynamics of the expression of cellular processes by studying gene expression at the population level and at single-cell resolution in wild type and mutants. Our results indicate that the regulatory architecture between MarA, SoxS, and Rob is dependent on the signal (inducer) present in the environment. The regulators, in response to an inducer, form a Feed Forward Loop (FFL), which leads to faster and stronger induction of target genes in the cell, consequently resulting in better cellular growth. Through the FFL, the cell is able to integrate qualitatively different signals in the network, and consequently, control cellular physiology. In addition, we present two intriguing dynamic features of the Mar-Sox-Rob regulon. First, in the presence of salicylate, the activation of target genes via MarA and Rob, at single-cell resolution, is qualitatively different. Second, we report the synergistic activation of target and Mar/Sox systems in the presence of both salicylate and paraquat. These results strongly indicate that there exists a complex control of gene regulation in the Mar-Sox-Rob regulon. Mechanistic details of this control are likely quite complex, and may involve additional regulators.
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Affiliation(s)
- Kirti Jain
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai - 400 076, India.
| | - Supreet Saini
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Powai, Mumbai - 400 076, India.
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Jiang C, Ji Y, Shi Y, Chen J, Cai T. Sulfate radical-based oxidation of fluoroquinolone antibiotics: Kinetics, mechanisms and effects of natural water matrices. WATER RESEARCH 2016; 106:507-517. [PMID: 27770727 DOI: 10.1016/j.watres.2016.10.025] [Citation(s) in RCA: 139] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 10/07/2016] [Accepted: 10/09/2016] [Indexed: 05/27/2023]
Abstract
Widespread occurrence of fluoroquinolone antibiotics (FQs) in surface water, groundwater, soil and sediment has been reported and their remediation is essentially needed. Sulfate radical (SO4-) based advanced oxidation processes (SR-AOPs) are promising technologies for soil and groundwater remediation. In this study, the degradation kinetics, mechanisms, and effects of natural water matrices on heat-activated persulfate (PS) oxidation of FQs were systematically investigated. Experimental results clearly demonstrated that 92% of CIP was removed within 180 min (pH = 7, 60 °C). Higher temperature and lower pH facilitated the degradation of ciprofloxacin (CIP). The piperazine moiety of CIP was identified as the reactive site for SO4- attack by comparison with substructural analogs, flumequine (FLU) and 1-(2-fluorophenyl) piperazine (FPP). A comparison of the degradation of CIP, norfloxacin (NOR), enrofloxacin (ENR) and ofloxacin (OFL) confirmed that the presence of cyclopropane ring also influence the degradation of FQs. Water matrix significantly influenced the degradation of CIP and ENR, and the degradation rate followed the order of Milli-Q water (pH = 7) > groundwater > artificial seawater > artificial surface water > lake water. Degradation products of CIP in different water matrix were enriched by solid phase extraction (SPE) and then analyzed by liquid chromatography-electrospray ionization-triple quadrupole mass spectrometry (LC-ESI-MS/MS). Detailed transformation pathways of CIP were proposed and were compared with respect to different water matrices. Four transformation pathways including stepwise piperazine ring oxidation, OH/F substitution, hydroxylation, and cyclopropane ring cleavage were proposed for CIP degradation. Results clearly show that the water matrix influenced the degradation of FQs appreciably, a phenomenon that should be taken into consideration when applying SR-AOPs for remediation of soil and groundwater contaminated by FQs.
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Affiliation(s)
- Canlan Jiang
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yuefei Ji
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yuanyuan Shi
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jifei Chen
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Tianming Cai
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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10
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Yuan QB, Guo MT, Wei WJ, Yang J. Reductions of bacterial antibiotic resistance through five biological treatment processes treated municipal wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:19495-503. [PMID: 27384166 DOI: 10.1007/s11356-016-7048-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Accepted: 06/06/2016] [Indexed: 05/21/2023]
Abstract
Wastewater treatment plants are hot spots for antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARGs). However, limited studies have been conducted to compare the reductions of ARB and ARGs by various biological treatment processes. The study explored the reductions of heterotrophic bacteria resistant to six groups of antibiotics (vancomycin, gentamicin, erythromycin, cephalexin, tetracycline, and sulfadiazine) and corresponding resistance genes (vanA, aacC1, ereA, ampC, tetA, and sulI) by five bench-scale biological reactors. Results demonstrated that membrane bioreactor (MBR) and sequencing batch reactor (SBR) significantly reduced ARB abundances in the ranges of 2.80∼3.54 log and 2.70∼3.13 log, respectively, followed by activated sludge (AS). Biological filter (BF) and anaerobic (upflow anaerobic sludge blanket, UASB) techniques led to relatively low reductions. In contrast, ARGs were not equally reduced as ARB. AS and SBR also showed significant potentials on ARGs reduction, whilst MBR and UASB could not reduce ARGs effectively. Redundancy analysis implied that the purification of wastewater quality parameters (COD, NH4 (+)-N, and turbidity) performed a positive correlation to ARB and ARGs reductions.
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Affiliation(s)
- Qing-Bin Yuan
- College of Environment, Nanjing Tech University, Nanjing, Jiangsu, 211800, China
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Mei-Ting Guo
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
| | - Wu-Ji Wei
- College of Environment, Nanjing Tech University, Nanjing, Jiangsu, 211800, China
| | - Jian Yang
- College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
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11
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Waiser MJ, Swerhone GDW, Roy J, Tumber V, Lawrence JR. Effects of erythromycin, trimethoprim and clindamycin on attached microbial communities from an effluent dominated prairie stream. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2016; 132:31-39. [PMID: 27261880 DOI: 10.1016/j.ecoenv.2016.05.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 05/25/2016] [Accepted: 05/26/2016] [Indexed: 06/05/2023]
Abstract
UNLABELLED In this study, differing metrics were utilized to measure effects of erythromycin (ER), trimethoprim (TR) and clindamycin (CL) on the structure and function of attached Wascana Creek, SK microbial communities. All three test antibiotics, especially ER, affected community structure and function of biofilms grown in rotating annular reactors. Biofilm thickness, bacterial biomass, and lectin binding biovolume (exopolymeric substances) were consistently less in ER treated biofilms when compared to the control. As well negative effects on protozoan numbers, and carbon utilization were detected. Finally, PCA analyses of DGGE results indicated that bacterial community diversity in ER exposed biofilms was always different from the control. ER exhibited toxic effects even at lower concentrations. Observations on TR and CL exposed biofilms indicated that bacterial biomass, lectin binding biovolume and carbon utilization were negatively affected as well. In terms of bacterial community diversity, however, CL exposed biofilms tended to group with the control while TR grouped with nutrient additions suggesting both nutritive and toxic effects. This study results represent an important step in understanding antibiotic effects, especially ER, on aquatic microbial communities. And because ER is so ubiquitous in receiving water bodies worldwide, the Wascana study results suggest the possibility of ecosystem disturbance elsewhere. CAPSULE ABSTRACT Erythromycin (ER) is ubiquitous in waterbodies receiving sewage effluent. Structure and function of microbial communities from an effluent dominated stream were negatively affected by ER, at realistic concentrations.
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Affiliation(s)
- M J Waiser
- Environment Canada, 11 Innovation Blvd., Saskatoon, SK S7N 3H5, Canada.
| | - G D W Swerhone
- Environment Canada, 11 Innovation Blvd., Saskatoon, SK S7N 3H5, Canada
| | - J Roy
- Environment Canada, 11 Innovation Blvd., Saskatoon, SK S7N 3H5, Canada
| | - V Tumber
- Environment Canada, 11 Innovation Blvd., Saskatoon, SK S7N 3H5, Canada
| | - J R Lawrence
- Environment Canada, 11 Innovation Blvd., Saskatoon, SK S7N 3H5, Canada
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12
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Guo MT, Yuan QB, Yang J. Distinguishing effects of ultraviolet exposure and chlorination on the horizontal transfer of antibiotic resistance genes in municipal wastewater. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:5771-8. [PMID: 25853586 DOI: 10.1021/acs.est.5b00644] [Citation(s) in RCA: 207] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Growing attention has been paid to the dissemination of antibiotic resistance genes (ARGs) in wastewater microbial communities; however, the disinfection processes, as microbial control technologies, have not been evaluated for their impacts on ARGs transfer. In this study, the effects of ultraviolet (UV) disinfection and chlorination on the frequency of ARGs transfer have been explored based on the conjugative transfer model between Gram-negative strains of E. coli. The results indicated that UV disinfection and chlorination exhibit distinct influences on the conjugative transfer. Low UV doses (up to 8 mJ/cm2) had little influence on the frequency of conjugative transfer, and UV exposure only decreased the bacterial number but did not change the cell permeability. By comparison, low chlorine doses (up to 40 mg Cl min/L) significantly promoted the frequency of conjugative transfer by 2-5-fold. The generated chloramine stimulated the bacteria and improved the cell permeability. More pilus were induced on the surface of conjugative cells, which acted as pathways for ARGs transfer. The frequency of ARG transfers was greatly suppressed by high doses of UV (>10 mJ/cm2) or chlorine (>80 mg Cl min/L).
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Affiliation(s)
- Mei-Ting Guo
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 200092 Shanghai, China
| | - Qing-Bin Yuan
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 200092 Shanghai, China
| | - Jian Yang
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 200092 Shanghai, China
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Narciso-da-Rocha C, Varela AR, Schwartz T, Nunes OC, Manaia CM. blaTEM and vanA as indicator genes of antibiotic resistance contamination in a hospital–urban wastewater treatment plant system. J Glob Antimicrob Resist 2014; 2:309-315. [DOI: 10.1016/j.jgar.2014.10.001] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 09/16/2014] [Accepted: 10/05/2014] [Indexed: 11/16/2022] Open
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Liu Y, Zhang J, Gao B, Feng S. Combined effects of two antibiotic contaminants on Microcystis aeruginosa. JOURNAL OF HAZARDOUS MATERIALS 2014; 279:148-155. [PMID: 25051238 DOI: 10.1016/j.jhazmat.2014.07.002] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2014] [Revised: 06/27/2014] [Accepted: 07/03/2014] [Indexed: 06/03/2023]
Abstract
Combined toxicity of spiramycin and amoxicillin was tested in Microcystis aeruginosa. The respective 50% effective concentrations (EC50mix) expressed in toxic unit (TU) values were 1.25 and 1.83 for spiramycin and amoxicillin mixed at 1:7 and 1:1, suggesting an antagonistic interaction at the median effect level. Deviations from the prediction of concentration addition (CA) and independent action (IA) models further indicated that combined toxicity of two antibiotics mixed at 1:1 varied from synergism to antagonism with increasing test concentration. Both the EC50mix of 0.86 (in TU value) and the deviation from two models manifested a synergistic interaction between spiramycin and amoxicillin mixed at 7:1. At an environmentally relevant concentration of 800ngL(-1), combined effect of mixed antibiotics on algal growth changed from stimulation to inhibition with the increasing proportion of higher toxic component (spiramycin). Chlorophyll-a content and expression levels of psbA, psaB, and rbcL varied in a similar manner as growth rate, suggesting a correlation between algal growth and photosynthesis under exposure to mixed antibiotics. The stimulation of microcystin-production by mixed antibiotics was related with the elevated expression of mcyB. The mixture of two target antibiotics with low proportion of spiramycin (<50%) could increase the harm of M. aeruginosa to aquatic environments by stimulating algal growth and production and release of microcystin-LR at their current contamination levels.
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Affiliation(s)
- Ying Liu
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China.
| | - Jian Zhang
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China
| | - Baoyu Gao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China
| | - Suping Feng
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, PR China
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Abundant rifampin resistance genes and significant correlations of antibiotic resistance genes and plasmids in various environments revealed by metagenomic analysis. Appl Microbiol Biotechnol 2014; 98:5195-204. [PMID: 24615381 DOI: 10.1007/s00253-014-5511-3] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Revised: 12/27/2013] [Accepted: 12/28/2013] [Indexed: 01/14/2023]
Abstract
In the present study, a newly developed metagenomic analysis approach was applied to investigate the abundance and diversity of antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs) in aquaculture farm sediments, activated sludge, biofilm, anaerobic digestion sludge, and river water. BLASTX analysis against the Comprehensive Antibiotic Resistance Database was conducted for the metagenomic sequence data of each sample and then the ARG-like sequences were sorted based on structured sub-database using customized scripts. The results showed that freshwater fishpond sediment had the highest abundance (196 ppm), and anaerobic digestion sludge possessed the highest diversity (133 subtypes) of ARGs among the samples in this study. Significantly, rifampin resistance genes were universal in all the diverse samples and consistently accounted for 26.9~38.6 % of the total annotated ARG sequences. Furthermore, a significant linear correlation (R (2) = 0.924) was found between diversities (number of subtypes) of ARGs and diversities of plasmids in diverse samples. This work provided a wide spectrum scan of ARGs and MGEs in different environments and revealed the prevalence of rifampin resistance genes and the strong correlation between ARG diversity and plasmid diversity for the first time.
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Guo MT, Yuan QB, Yang J. Microbial selectivity of UV treatment on antibiotic-resistant heterotrophic bacteria in secondary effluents of a municipal wastewater treatment plant. WATER RESEARCH 2013; 47:6388-6394. [PMID: 24001605 DOI: 10.1016/j.watres.2013.08.012] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 07/19/2013] [Accepted: 08/07/2013] [Indexed: 06/02/2023]
Abstract
Little is known about the microbial selectivity of UV treatment for antibiotic resistant bacteria, and the results of limited studies are conflicting. To understand the effect of UV disinfection on antibiotic resistant bacteria, both total heterotrophic bacteria and antibiotic resistant bacteria (including cephalexin-, ciprofloxacin-, erythromycin-, gentamicin-, vancomycin-, sulfadiazine-, rifampicin-, tetracycline- and chloramphenicol-resistant bacteria) were examined in secondary effluent samples from a municipal wastewater treatment plant. Bacteria resistant to both erythromycin and tetracycline were chosen as the representative of multiple-antibiotic-resistant bacteria and their characteristics after UV treatment were also investigated. UV disinfection results in effective inactivation for total heterotrophic bacteria, as well as all antibiotic resistant bacteria. After UV treatment at a fluence of 5 mJ/cm(2), the log reductions of nine types of antibiotic resistant bacteria varied from 1.0 ± 0.1 to 2.4 ± 0.1. Bacteria resistant to both erythromycin and tetracycline had a similar fluence response as did total heterotrophic bacteria. The findings suggest that UV disinfection could eliminate antibiotic resistance in wastewater treatment effluents and thus ensure public health security. Our experimental results indicated that UV disinfection led to enrichment of bacteria with resistance to sulfadiazine, vancomycin, rifampicin, tetracycline and chloramphenicol, while the proportions of cephalexin-, erythromycin-, gentamicin- and ciprofloxacin-resistant bacteria in the wastewater decreased. This reveals the microbial selectivity of UV disinfection for antibiotic resistant bacteria.
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Affiliation(s)
- Mei-Ting Guo
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, 200092 Shanghai, China; State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (MARC), Tsinghua University, 100084 Beijing, China.
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Michael I, Hapeshi E, Aceña J, Perez S, Petrović M, Zapata A, Barceló D, Malato S, Fatta-Kassinos D. Light-induced catalytic transformation of ofloxacin by solar Fenton in various water matrices at a pilot plant: mineralization and characterization of major intermediate products. THE SCIENCE OF THE TOTAL ENVIRONMENT 2013; 461-462:39-48. [PMID: 23712114 DOI: 10.1016/j.scitotenv.2013.04.054] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Revised: 04/05/2013] [Accepted: 04/18/2013] [Indexed: 06/02/2023]
Abstract
This work investigated the application of a solar driven advanced oxidation process (solar Fenton), for the degradation of the antibiotic ofloxacin (OFX) in various environmental matrices at a pilot-scale. All experiments were carried out in a compound parabolic collector pilot plant in the presence of doses of H2O2 (2.5 mg L(-1)) and at an initial Fe(2+) concentration of 2 mg L(-1). The water matrices used for the solar Fenton experiments were: demineralized water (DW), simulated natural freshwater (SW), simulated effluent from municipal wastewater treatment plant (SWW) and pre-treated real effluent from municipal wastewater treatment plant (RE) to which OFX had been spiked at 10 mg L(-1). Dissolved organic carbon removal was found to be dependent on the chemical composition of the water matrix. OFX mineralization was higher in DW (78.1%) than in SW (58.3%) at 12 mg L(-1) of H2O2 consumption, implying the complexation of iron or the scavenging of hydroxyl radicals by the inorganic ions present in SW. On the other hand, the presence of dissolved organic matter (DOM) in SWW and RE, led to lower mineralization per dose of H2O2 compared to DW and SW. The major transformation products (TPs) formed during the solar Fenton treatment of OFX, were elucidated using liquid chromatography-time of flight-mass spectrometry (LC-ToF-MS). The transformation of OFX proceeded through a defluorination reaction, accompanied by some degree of piperazine and quinolone substituent transformation while a hydroxylation mechanism occurred by attack of the hydroxyl radicals generated during the process leading to the formation of TPs in all the water matrices, seven of which were tentatively identified. The results obtained from the toxicity bioassays indicated that the toxicity originates from the DOM present in RE and its oxidation products formed during the photocatalytic treatment and not from the TPs resulted from the oxidation of OFX.
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Affiliation(s)
- I Michael
- NIREAS, International Water Research Centre, University of Cyprus, Kallipoleos 75, P.O. Box 20537, 1678 Nicosia, Cyprus
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Yang X, Chen F, Meng F, Xie Y, Chen H, Young K, Luo W, Ye T, Fu W. Occurrence and fate of PPCPs and correlations with water quality parameters in urban riverine waters of the Pearl River Delta, South China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:5864-75. [PMID: 23608973 DOI: 10.1007/s11356-013-1641-x] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Accepted: 03/13/2013] [Indexed: 05/18/2023]
Abstract
The occurrence and fate of eight PPCPs was studied in river waters from upstream to downstream of the three rivers in the Pearl River Delta, China. The correlations of PPCP levels and water quality parameters were also investigated. The analytes of the highest concentrations were caffeine, acetaminophen, and ciprofloxacin. Carbamazepine and erythromycin-H2O were detected at the lowest concentrations. The highest concentrations of PPCPs were found in the Shijing River, with 865 ng/L caffeine, 339 ng/L acetaminophen, and 304 ng/L ciprofloxacin. In general, the levels of PPCPs in the Zhujiang River were higher at sites where the metropolitan city Guangzhou is located and decreased from the epicenter along the river. Low levels of PPCPs were generally found in the Beijiang River. Positive correlations were found between PPCP levels, total nitrogen, ammonium nitrogen, and cumulative fluorescence excitation-emission matrix (EEM) volume. Among the four PPCPs evaluated (caffeine, acetaminophen, ciprofloxacin, and sulfamethoxazole), caffeine had the best correlations with the correlation coefficients ranging from 0.62 to 0.98. The prediction of PPCP concentrations at specified locations can be substantially simplified.
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Affiliation(s)
- Xin Yang
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou, 510275, China.
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Michael I, Rizzo L, McArdell CS, Manaia CM, Merlin C, Schwartz T, Dagot C, Fatta-Kassinos D. Urban wastewater treatment plants as hotspots for the release of antibiotics in the environment: a review. WATER RESEARCH 2013; 47:957-95. [PMID: 23266388 DOI: 10.1016/j.watres.2012.11.027] [Citation(s) in RCA: 971] [Impact Index Per Article: 88.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Revised: 11/15/2012] [Accepted: 11/17/2012] [Indexed: 05/17/2023]
Abstract
Urban wastewater treatment plants (UWTPs) are among the main sources of antibiotics' release into various compartments of the environment worldwide. The aim of the present paper is to critically review the fate and removal of various antibiotics in wastewater treatment, focusing on different processes (i.e. biological processes, advanced treatment technologies and disinfection) in view of the current concerns related to the induction of toxic effects in aquatic and terrestrial organisms, and the occurrence of antibiotics that may promote the selection of antibiotic resistance genes and bacteria, as reported in the literature. Where available, estimations of the removal of antibiotics are provided along with the main treatment steps. The removal efficiency during wastewater treatment processes varies and is mainly dependent on a combination of antibiotics' physicochemical properties and the operating conditions of the treatment systems. As a result, the application of alternative techniques including membrane processes, activated carbon adsorption, advanced oxidation processes (AOPs), and combinations of them, which may lead to higher removals, may be necessary before the final disposal of the effluents or their reuse for irrigation or groundwater recharge.
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Affiliation(s)
- I Michael
- Nireas-International Water Research Centre, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
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Oldenkamp R, Huijbregts MAJ, Hollander A, Versporten A, Goossens H, Ragas AMJ. Spatially explicit prioritization of human antibiotics and antineoplastics in Europe. ENVIRONMENT INTERNATIONAL 2013; 51:13-26. [PMID: 23138017 DOI: 10.1016/j.envint.2012.09.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Revised: 09/04/2012] [Accepted: 09/21/2012] [Indexed: 05/11/2023]
Abstract
This paper presents a screening tool for the location-specific prioritization of human pharmaceutical emissions in Europe, based on risk quotients for the aquatic environment and human health. The tool provides direction towards either monitoring activities or additional research. Its application is illustrated for a set of 11 human antibiotics and 7 antineoplastics. Risk quotients for the aquatic environment were highest for levofloxacin, doxycycline and ciprofloxacin, located in Northern Italy (Milan region; particularly levofloxacin) and other densely populated areas in Europe (e.g. London, Krakow and the Ruhr area). Risk quotients for human health not only depend on pharmaceutical and location, but also on behavioral characteristics, such as consumption patterns. Infants in eastern Spain that consume locally produced food and conventionally treated drinking water were predicted to run the highest risks. A limited comparison with measured concentrations in surface water showed that predicted and measured concentrations are approximately within one order of magnitude.
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Affiliation(s)
- Rik Oldenkamp
- Department of Environmental Science, Institute for Wetland and Water Research, Radboud University Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands.
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Michael I, Hapeshi E, Michael C, Varela AR, Kyriakou S, Manaia CM, Fatta-Kassinos D. Solar photo-Fenton process on the abatement of antibiotics at a pilot scale: Degradation kinetics, ecotoxicity and phytotoxicity assessment and removal of antibiotic resistant enterococci. WATER RESEARCH 2012; 46:5621-5634. [PMID: 22901406 DOI: 10.1016/j.watres.2012.07.049] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Revised: 07/25/2012] [Accepted: 07/26/2012] [Indexed: 06/01/2023]
Abstract
This work investigated the application of a solar driven advanced oxidation process (solar photo-Fenton), for the degradation of antibiotics at low concentration level (μg L(-1)) in secondary treated domestic effluents at a pilot-scale. The examined antibiotics were ofloxacin (OFX) and trimethoprim (TMP). A compound parabolic collector (CPC) pilot plant was used for the photocatalytic experiments. The process was mainly evaluated by a fast and reliable analytical method based on a UPLC-MS/MS system. Solar photo-Fenton process using low iron and hydrogen peroxide doses ([Fe(2+)](0) = 5 mg L(-1); [H(2)O(2)](0) = 75 mg L(-1)) was proved to be an efficient method for the elimination of these compounds with relatively high degradation rates. The photocatalytic degradation of OFX and TMP with the solar photo-Fenton process followed apparent first-order kinetics. A modification of the first-order kinetic expression was proposed and has been successfully used to explain the degradation kinetics of the compounds during the solar photo-Fenton treatment. The results demonstrated the capacity of the applied advanced process to reduce the initial wastewater toxicity against the examined plant species (Sorghum saccharatum, Lepidium sativum, Sinapis alba) and the water flea Daphnia magna. The phytotoxicity of the treated samples, expressed as root growth inhibition, was higher compared to that observed on the inhibition of seed germination. Enterococci, including those resistant to OFX and TMP, were completely eliminated at the end of the treatment. The total cost of the full scale unit for the treatment of 150 m(3) day(-1) of secondary wastewater effluent was found to be 0.85 € m(-3).
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Affiliation(s)
- I Michael
- Department of Civil and Environmental Engineering, University of Cyprus, 75 Kallipoleos St., 1678 Nicosia, Cyprus; Nireas, International Water Research Centre, University of Cyprus, Cyprus
| | - E Hapeshi
- Department of Civil and Environmental Engineering, University of Cyprus, 75 Kallipoleos St., 1678 Nicosia, Cyprus; Nireas, International Water Research Centre, University of Cyprus, Cyprus
| | - C Michael
- Department of Civil and Environmental Engineering, University of Cyprus, 75 Kallipoleos St., 1678 Nicosia, Cyprus; Nireas, International Water Research Centre, University of Cyprus, Cyprus
| | - A R Varela
- CBQF/Escola Superior de Biotecnologia, Universidade Católica Portuguesa, R. Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal
| | - S Kyriakou
- S.K. Euromarket Ltd., Water and Wastewater Engineering, 3308 Lemessos, Cyprus
| | - C M Manaia
- CBQF/Escola Superior de Biotecnologia, Universidade Católica Portuguesa, R. Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal
| | - D Fatta-Kassinos
- Department of Civil and Environmental Engineering, University of Cyprus, 75 Kallipoleos St., 1678 Nicosia, Cyprus; Nireas, International Water Research Centre, University of Cyprus, Cyprus.
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Simultaneous extraction and determination of sulfadiazine and sulfamethoxazole in water samples and aquaculture products using [Bmim]BF4/(NH4)3C6H5O7 aqueous two-phase system coupled with HPLC. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2012. [DOI: 10.1007/s13738-012-0164-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Michael I, Hapeshi E, Osorio V, Perez S, Petrovic M, Zapata A, Malato S, Barceló D, Fatta-Kassinos D. Solar photocatalytic treatment of trimethoprim in four environmental matrices at a pilot scale: transformation products and ecotoxicity evaluation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2012; 430:167-173. [PMID: 22647240 DOI: 10.1016/j.scitotenv.2012.05.003] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Revised: 05/01/2012] [Accepted: 05/01/2012] [Indexed: 06/01/2023]
Abstract
The pilot-scale solar degradation of trimethoprim (TMP) in different water matrices (demineralized water: DW, simulated natural freshwater: SW; simulated wastewater: SWW; and real effluent: RE) was investigated in this study. DOC removal was lower in the case of SW compared to DW, which can be attributed to the presence of inorganic anions which may act as scavengers of the HO·. Furthermore, the presence of organic carbon and higher salt content in SWW and RE led to lower mineralization per dose of hydrogen peroxide compared to DW and SW. Toxicity assays in SWW and RE were also performed indicating that toxicity is attributed to the compounds present in RE and their by-products formed during solar Fenton treatment and not to the intermediates formed by the oxidation of TMP. A large number of compounds generated by the photocatalytic transformation of TMP were identified by UPLC-QToF/MS. The degradation pathway revealed differences among the four matrices; however hydroxylation, demethylation and cleavage reactions were observed in all matrices. To the best of our knowledge this is the first time that TMP degradation products have been identified by adopting a solar Fenton process at a pilot-scale set-up, using four different aqueous matrices.
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Affiliation(s)
- I Michael
- Department of Civil and Environmental Engineering, University of Cyprus, 75 Kallipoleos St., 1678, Nicosia, Cyprus
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Jones-Lepp TL, Sanchez C, Alvarez DA, Wilson DC, Taniguchi-Fu RL. Point sources of emerging contaminants along the Colorado River Basin: source water for the arid Southwestern United States. THE SCIENCE OF THE TOTAL ENVIRONMENT 2012; 430:237-45. [PMID: 22684090 DOI: 10.1016/j.scitotenv.2012.04.053] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Revised: 04/20/2012] [Accepted: 04/21/2012] [Indexed: 05/22/2023]
Abstract
Emerging contaminants (ECs) (e.g., pharmaceuticals, illicit drugs, personal care products) have been detected in waters across the United States. The objective of this study was to evaluate point sources of ECs along the Colorado River, from the headwaters in Colorado to the Gulf of California. At selected locations in the Colorado River Basin (sites in Colorado, Utah, Nevada, Arizona, and California), waste stream tributaries and receiving surface waters were sampled using either grab sampling or polar organic chemical integrative samplers (POCIS). The grab samples were extracted using solid-phase cartridge extraction (SPE), and the POCIS sorbents were transferred into empty SPEs and eluted with methanol. All extracts were prepared for, and analyzed by, liquid chromatography-electrospray-ion trap mass spectrometry (LC-ESI-ITMS). Log D(OW) values were calculated for all ECs in the study and compared to the empirical data collected. POCIS extracts were screened for the presence of estrogenic chemicals using the yeast estrogen screen (YES) assay. Extracts from the 2008 POCIS deployment in the Las Vegas Wash showed the second highest estrogenicity response. In the grab samples, azithromycin (an antibiotic) was detected in all but one urban waste stream, with concentrations ranging from 30ng/L to 2800ng/L. Concentration levels of azithromycin, methamphetamine and pseudoephedrine showed temporal variation from the Tucson WWTP. Those ECs that were detected in the main surface water channels (those that are diverted for urban use and irrigation along the Colorado River) were in the region of the limit-of-detection (e.g., 10ng/L), but most were below detection limits.
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Affiliation(s)
- Tammy L Jones-Lepp
- US Environmental Protection Agency, National Exposure Research Laboratory, Office of Research and Development, PO Box 93478, Las Vegas, NV 89193, USA.
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Czekalski N, Berthold T, Caucci S, Egli A, Bürgmann H. Increased levels of multiresistant bacteria and resistance genes after wastewater treatment and their dissemination into lake geneva, Switzerland. Front Microbiol 2012; 3:106. [PMID: 22461783 PMCID: PMC3310248 DOI: 10.3389/fmicb.2012.00106] [Citation(s) in RCA: 234] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Accepted: 03/02/2012] [Indexed: 02/01/2023] Open
Abstract
At present, very little is known about the fate and persistence of multiresistant bacteria (MRB) and their resistance genes in natural aquatic environments. Treated, but partly also untreated sewage of the city of Lausanne, Switzerland is discharged into Vidy Bay (Lake Geneva) resulting in high levels of contamination in this part of the lake. In the present work we have studied the prevalence of MRB and resistance genes in the wastewater stream of Lausanne. Samples from hospital and municipal raw sewage, treated effluent from Lausanne’s wastewater treatment plant (WTP) as well as lake water and sediment samples obtained close to the WTP outlet pipe and a remote site close to a drinking water pump were evaluated for the prevalence of MRB. Selected isolates were identified (16S rRNA gene fragment sequencing) and characterized with regards to further resistances, resistance genes, and plasmids. Mostly, studies investigating this issue have relied on cultivation-based approaches. However, the limitations of these tools are well known, in particular for environmental microbial communities, and cultivation-independent molecular tools should be applied in parallel in order to take non-culturable organisms into account. Here we directly quantified the sulfonamide resistance genes sul1 and sul2 from environmental DNA extracts using TaqMan real-time quantitative PCR. Hospital sewage contained the highest load of MRB and antibiotic resistance genes (ARGs). Wastewater treatment reduced the total bacterial load up to 78% but evidence for selection of extremely multiresistant strains and accumulation of resistance genes was observed. Our data clearly indicated pollution of sediments with ARGs in the vicinity of the WTP outlet. The potential of lakes as reservoirs of MRB and potential risks are discussed.
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Affiliation(s)
- Nadine Czekalski
- Department of Surface Waters - Research and Management, Eawag: Swiss Federal Institute of Aquatic Science and Technology Kastanienbaum, Switzerland
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Liu Y, Gao B, Yue Q, Guan Y, Wang Y, Huang L. Influences of two antibiotic contaminants on the production, release and toxicity of microcystins. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2012; 77:79-87. [PMID: 22074855 DOI: 10.1016/j.ecoenv.2011.10.027] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Revised: 10/19/2011] [Accepted: 10/25/2011] [Indexed: 05/15/2023]
Abstract
The influences of spiramycin and amoxicillin on the algal growth, production and release of target microcystins (MCs), MC-LR, MC-RR and MC-YR, in Microcystis aeruginosa were investigated through the seven-day exposure test. Spiramycin were more toxic to M. aeruginosa than amoxicillin according to their 50 percent effective concentrations (EC(50)) in algal growth, which were 1.15 and 8.03 μg/l, respectively. At environmentally relevant concentrations of 100 ng/l-1 μg/l, spiramycin reduced the total MC content per algal cell and inhibited the algal growth, while exposure to amoxicillin led to increases in the total MC content per algal cell and the percentage of extracellular MCs, without affecting the algal growth. Toxicity of MCs in combination with each antibiotic was assessed in the luminescent bacteria test using the toxic unit (TU) approach. The 50 percent effective concentrations for the mixtures (EC(50mix)) were 0.56 TU and 0.48 TU for MCs in combination with spiramycin and amoxicillin, respectively, indicating a synergistic interaction between MCs and each antibiotic (EC(50mix)<1TU). After seven-day exposure to 100 ng/l-1 μg/l of antibiotics, spiramycin-treated algal media and amoxicillin-treated algal media showed significantly lower (p<0.05) and higher (p<0.05) inhibition on the luminescence of Photobacterium phosphoreum, respectively, compared with the untreated algal medium. These results indicated that the toxicity of MCs were alleviated by spiramycin and enhanced by amoxicillin, and the latter effect would increase threats to the aquatic environment.
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Affiliation(s)
- Ying Liu
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, People's Republic of China
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Zou LK, Li LW, Pan X, Tian GB, Luo Y, Wu Q, Li B, Cheng L, Xiao JJ, Hu S, Zhou Y, Pang YJ. Molecular characterization of β-lactam-resistant Escherichia coli isolated from Fu River, China. World J Microbiol Biotechnol 2012; 28:1891-9. [DOI: 10.1007/s11274-011-0987-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Accepted: 12/17/2011] [Indexed: 10/14/2022]
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28
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Lobova TI, Feil EJ, Popova LY. Multiple antibiotic resistance of heterotrophic bacteria isolated from Siberian lakes subjected to differing degrees of anthropogenic impact. Microb Drug Resist 2011; 17:583-91. [PMID: 22008039 DOI: 10.1089/mdr.2011.0044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The antibiotic resistance profiles of 150 heterotrophic bacterial isolates recovered from two lakes in Southern Siberia was determined to examine the effect of anthropogenic disturbance on aquatic ecosystems. Resistance was detected in at least one strain for seven of the eight antibiotics tested, the exception being amikacin. Resistance to antibiotics predominated in the areas of the lakes likely to be under highest anthropogenic disturbance. Resistance was more frequently observed among isolates recovered from within the proximity to a tourist resort (Lake Shira; 63% of bacteria with multiple antibiotic resistance (MAR) in the resort part), or the shore line (Lake Shunet; 100% of bacteria with MAR) than among isolates from the center of each lake; 42.5% of bacteria with MAR from Lake Shira and 25%/75% of bacteria are resistant to three/four antibiotics consequently from Lake Shunet. Plasmid profiles were determined from a sample of 37 multiply resistant bacteria, and between one and four plasmids were isolated from each isolate; the plasmids ranged in size from 2.3 to 23.1 kb. These observations are consistent with anthropogenic disturbance playing one of the key roles in the dissemination of antibiotic resistance in the aquatic ecosystems.
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Affiliation(s)
- Tatiana I Lobova
- Krasnoyarsk Scientific Centre , Russian Academy of Sciences, Siberian Branch, Academgorodok 50, Krasnoyarsk, Russian Federation.
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Manaia CM, Vaz-Moreira I, Nunes OC. Antibiotic Resistance in Waste Water and Surface Water and Human Health Implications. THE HANDBOOK OF ENVIRONMENTAL CHEMISTRY 2011. [DOI: 10.1007/698_2011_118] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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30
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Fatta-Kassinos D, Meric S, Nikolaou A. Pharmaceutical residues in environmental waters and wastewater: current state of knowledge and future research. Anal Bioanal Chem 2010; 399:251-75. [PMID: 21063687 DOI: 10.1007/s00216-010-4300-9] [Citation(s) in RCA: 485] [Impact Index Per Article: 34.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Revised: 10/01/2010] [Accepted: 10/05/2010] [Indexed: 11/25/2022]
Affiliation(s)
- Despo Fatta-Kassinos
- Department of Civil and Environmental Engineering, GAIA, Laboratory of Environmental Engineering, University of Cyprus, 75, Kallipoleos, 1678 Nicosia, Cyprus.
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Contreras-Moreira B, Sachman-Ruiz B, Figueroa-Palacios I, Vinuesa P. primers4clades: a web server that uses phylogenetic trees to design lineage-specific PCR primers for metagenomic and diversity studies. Nucleic Acids Res 2009; 37:W95-W100. [PMID: 19465390 PMCID: PMC2703966 DOI: 10.1093/nar/gkp377] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Primers4clades is an easy-to-use web server that implements a fully automatic PCR primer design pipeline for cross-species amplification of novel sequences from metagenomic DNA, or from uncharacterized organisms, belonging to user-specified phylogenetic clades or taxa. The server takes a set of non-aligned protein coding genes, with or without introns, aligns them and computes a neighbor-joining tree, which is displayed on screen for easy selection of species or sequence clusters to design lineage-specific PCR primers. Primers4clades implements an extended CODEHOP primer design strategy based on both DNA and protein multiple sequence alignments. It evaluates several thermodynamic properties of the oligonucleotide pairs, and computes the phylogenetic information content of the predicted amplicon sets from Shimodaira-Hasegawa-like branch support values of maximum likelihood phylogenies. A non-redundant set of primer formulations is returned, ranked according to their thermodynamic properties. An amplicon distribution map provides a convenient overview of the coverage of the target locus. Altogether these features greatly help the user in making an informed choice between alternative primer pair formulations. Primers4clades is available at two mirror sites: http://maya.ccg.unam.mx/primers4clades/and http://floresta.eead.csic.es/primers4clades/. Three demo data sets and a comprehensive documentation/tutorial page are provided for easy testing of the server's capabilities and interface.
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Affiliation(s)
- Bruno Contreras-Moreira
- Estación Experimental de Aula Dei, Consejo Superior de Investigaciones Científicas, Zaragoza, Mexico
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