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Dobon B, Musciotto F, Mira A, Greenacre M, Schlaepfer R, Aguileta G, Astete LH, Ngales M, Latora V, Battiston F, Vinicius L, Migliano AB, Bertranpetit J. The making of the oral microbiome in Agta hunter-gatherers. EVOLUTIONARY HUMAN SCIENCES 2023; 5:e13. [PMID: 37587941 PMCID: PMC10426117 DOI: 10.1017/ehs.2023.9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 04/04/2023] [Accepted: 04/06/2023] [Indexed: 08/18/2023] Open
Abstract
Ecological and genetic factors have influenced the composition of the human microbiome during our evolutionary history. We analysed the oral microbiota of the Agta, a hunter-gatherer population where some members have adopted an agricultural diet. We show that age is the strongest factor modulating the microbiome, probably through immunosenescence since we identified an increase in the number of species classified as pathogens with age. We also characterised biological and cultural processes generating sexual dimorphism in the oral microbiome. A small subset of oral bacteria is influenced by the host genome, linking host collagen genes to bacterial biofilm formation. Our data also suggest that shifting from a fish/meat diet to a rice-rich diet transforms their microbiome, mirroring the Neolithic transition. All of these factors have implications in the epidemiology of oral diseases. Thus, the human oral microbiome is multifactorial and shaped by various ecological and social factors that modify the oral environment.
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Affiliation(s)
- Begoña Dobon
- Department of Anthropology, University of Zurich, Switzerland
- Institut de Biologia Evolutiva (CSIC-Universitat Pompeu Fabra), Barcelona, Spain
| | - Federico Musciotto
- Department of Anthropology, University of Zurich, Switzerland
- Dipartimento di Fisica e Chimica, Università di Palermo, Italy
| | - Alex Mira
- Department of Health and Genomics, Center for Advanced Research in Public Health, FISABIO Foundation, Valencia, Spain
- CIBER Center for Epidemiology and Public Health, Madrid, Spain
| | - Michael Greenacre
- Department of Economics and Business, Universitat Pompeu Fabra and Barcelona Graduate School of Economics, Barcelona, Spain
- Faculty of Biosciences, Fisheries and Economics, University of Tromsø, Norway
| | | | - Gabriela Aguileta
- Institut de Biologia Evolutiva (CSIC-Universitat Pompeu Fabra), Barcelona, Spain
| | - Leonora H. Astete
- Lyceum of the Philippines University, Intramuros, Manila, Philippines
| | - Marilyn Ngales
- Lyceum of the Philippines University, Intramuros, Manila, Philippines
| | - Vito Latora
- School of Mathematical Sciences, Queen Mary University of London, UK
- Dipartimento di Fisica ed Astronomia, Università di Catania and INFN, Catania, Italy
- Complexity Science Hub Vienna, Vienna, Austria
| | - Federico Battiston
- Department of Anthropology, University of Zurich, Switzerland
- Department of Network and Data Science, Central European University, Vienna 1100, Austria
| | - Lucio Vinicius
- Department of Anthropology, University of Zurich, Switzerland
- Department of Anthropology, University College London, UK
| | - Andrea B. Migliano
- Department of Anthropology, University of Zurich, Switzerland
- Department of Anthropology, University College London, UK
| | - Jaume Bertranpetit
- Institut de Biologia Evolutiva (CSIC-Universitat Pompeu Fabra), Barcelona, Spain
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Zhang C, Chen X, Han M, Li X, Chang H, Ren N, Ho SH. Revealing the role of microalgae-bacteria niche for boosting wastewater treatment and energy reclamation in response to temperature. ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY 2023; 14:100230. [PMID: 36590875 PMCID: PMC9800309 DOI: 10.1016/j.ese.2022.100230] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 11/30/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Conventional biological treatment usually cannot achieve the same high water quality as advanced treatment when conducted under varied temperatures. Here, satisfactory wastewater treatment efficiency was observed in a microalgae-bacteria consortia (MBC) over a wide temperature range because of the predominance of microalgae. Microalgae contributed more toward wastewater treatment at low temperature because of the unsatisfactory performance of the accompanying bacteria, which experienced cold stress (e.g., bacterial abundance below 3000 sequences) and executed defensive strategies (e.g., enrichment of cold-shock proteins). A low abundance of amoA-C and hao indicated that conventional nitrogen removal was replaced through the involvement of microalgae. Diverse heterotrophic bacteria for nitrogen removal were identified at medium and high temperatures, implying this microbial niche treatment contained diverse flexible consortia with temperature variation. Additionally, pathogenic bacteria were eliminated through microalgal photosynthesis. After fitting the neutral community model and calculating the ecological niche, microalgae achieved a maximum niche breadth of 5.21 and the lowest niche overlap of 0.38, while the accompanying bacterial community in the consortia were shaped through deterministic processes. Finally, the maximum energy yield of 87.4 kJ L-1 and lipid production of 1.9 g L-1 were achieved at medium temperature. Altogether, this study demonstrates that advanced treatment and energy reclamation can be achieved through microalgae-bacteria niche strategies.
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Affiliation(s)
- Chaofan Zhang
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Xi Chen
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Meina Han
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Xue Li
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Haixing Chang
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing, 400054, PR China
| | - Nanqi Ren
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Shih-Hsin Ho
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
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Synthetic Progestins in Waste and Surface Waters: Concentrations, Impacts and Ecological Risk. TOXICS 2022; 10:toxics10040163. [PMID: 35448424 PMCID: PMC9026682 DOI: 10.3390/toxics10040163] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 03/22/2022] [Accepted: 03/23/2022] [Indexed: 02/01/2023]
Abstract
Synthetic progestins (PGs) are a large family of hormones used in continuously growing amounts in human and animal contraception and medicinal therapies. Because wastewater treatment plants (WWTPs) are unable to eradicate PGs after excretion, they are discharged into aquatic systems, where they can also be regenerated from conjugated PG metabolites. This review summarises the concentrations of 12 PGs in waters from 2015 to 2021. The selected PGs were considered of particular interest due to their wide use, activity, and hormonal derivation (from testosterone, progesterone, and spirolactone). We concluded that PGs had been analysed in WWTPs influents and effluents and, to a lesser extent, in other matrices, including surface waters, where their concentrations range from ng/L to a few µg/L. Because of their high affinity for cell hormone receptors, PGs are endocrine disruptor compounds that may alter the reproductive fitness and development of biota. This review focused on their biological effects in fish, which are the most used aquatic model organisms to qualify the impacts of PGs, highlighting the risks that environmental concentrations pose to their health, fecundity, and fertility. It is concluded that PGs research should be expanded because of the still limited data on their environmental concentrations and effects.
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Meganathan B, Rathinavel T, Rangaraj S. Trends in microbial degradation and bioremediation of emerging contaminants. PHYSICAL SCIENCES REVIEWS 2021. [DOI: 10.1515/psr-2021-0060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Modernization and modern ways of living demands more improved products from pharmaceuticals, cosmetics, and food processing industries. Moreover, industries like pesticides, fertilizers, dyeing, paints, detergent etc., also needs improvised products as per demand. As the new product emerges, the pollutants from these industries also constitute new type of danger to the environment and serious health risks to the living organisms. These emerging contaminants (ECs) are from different category of sources such as personal care products (PCPs), pharmaceuticals (Phcs), endocrine disrupting chemicals (EDCs), etc. These ECs can easily escape from the conventional water treatment and eventually get discharged in to the surface water and thus enters in to the ground water, soil, sediments, and also into the oceans. When these contaminants emerge we also require progress in tremendous process for preventing these hazardous chemicals by effective removal and treatment. For the past 50 years, both developed and developing countries are working on this treatment process and found that Microbial degradation and bioremediation are very useful for effective treatment to prevent their emissions. This treatment can be designed for any sort of ECs since the microbial members are so versatile to redesign their metabolic pathways when subject to exposure. However, implementing bioremediation is not alone efficient to degrade ECs and hence, combination of bioremediation, nanotechnology and physical treatment method will also provide sustainable, potent and fast degradation process. In this Book Chapter, we discuss in detail about the ECs, sources of microbial degradation process and its usefulness in the bioremediation of these ECs.
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Affiliation(s)
| | | | - Suriyaprabha Rangaraj
- Department of Biotechnology , Sona College of Arts and Science , Salem 636 005 , India
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Zhao HN, Tian Z, Kim KE, Wang R, Lam K, Kolodziej EP. Biotransformation of Current-Use Progestin Dienogest and Drospirenone in Laboratory-Scale Activated Sludge Systems Forms High-Yield Products with Altered Endocrine Activity. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:13869-13880. [PMID: 34582191 DOI: 10.1021/acs.est.1c03805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Dienogest (DIE) and drospirenone (DRO) are two fourth-generation synthetic progestins widely used as oral contraceptives. Despite their increasing detection in wastewaters and surface waters, their fate during biological wastewater treatment is unclear. Here, we investigated DIE and DRO biotransformation with representative activated sludge batch incubations and identified relevant transformation products (TPs) using high-resolution mass spectrometry. DIE exhibited slow biotransformation (16-30 h half-life) and proceeded through a quantitative aromatic dehydrogenation to form TP 309 (molar yields of ∼55%), an aromatic TP ∼30% estrogenic as 17β-estradiol. DRO experienced more rapid biotransformation (<0.5 h half-life), and 1,2-dehydrogenation formed the major TP 364 (molar yields of ∼40%), an antimineralocorticoid drug candidate named as spirorenone. Lactone ring hydrolysis was another important biotransformation pathway for DRO (molar yields of ∼20%) and generated pharmacologically inactive TP 384. Other minor pathways for DIE and DRO included hydroxylation, methoxylation, and 3-keto and C4(5) double-bond hydrogenation; distinct bioactivities are plausible for such TPs, including antigestagenic activity, antigonadotropic activity, and pregnancy inhibition effects. Thus, biotransformation products of DIE and DRO during wastewater treatment should be considered in environmental assessments of synthetic progestins, especially certain TPs such as the estrogenic TP 309 of DIE and the antimineralocorticoid spirorenone (TP 364) of DRO.
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Affiliation(s)
- Haoqi Nina Zhao
- Department of Civil and Environmental Engineering, University of Washington, Seattle, Washington 98195, United States
- Center for Urban Waters, Tacoma, Washington 98421, United States
| | - Zhenyu Tian
- Center for Urban Waters, Tacoma, Washington 98421, United States
- Interdisciplinary Arts and Sciences, University of Washington Tacoma, Tacoma, Washington 98421, United States
| | - Kelly E Kim
- Interdisciplinary Arts and Sciences, University of Washington Tacoma, Tacoma, Washington 98421, United States
| | - Rui Wang
- Department of Civil and Environmental Engineering, University of Washington, Seattle, Washington 98195, United States
- Center for Urban Waters, Tacoma, Washington 98421, United States
| | - Kenji Lam
- Department of Civil and Environmental Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Edward P Kolodziej
- Department of Civil and Environmental Engineering, University of Washington, Seattle, Washington 98195, United States
- Center for Urban Waters, Tacoma, Washington 98421, United States
- Interdisciplinary Arts and Sciences, University of Washington Tacoma, Tacoma, Washington 98421, United States
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6
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Chiang Y, Wei ST, Wang P, Wu P, Yu C. Microbial degradation of steroid sex hormones: implications for environmental and ecological studies. Microb Biotechnol 2020; 13:926-949. [PMID: 31668018 PMCID: PMC7264893 DOI: 10.1111/1751-7915.13504] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 10/09/2019] [Accepted: 10/09/2019] [Indexed: 12/13/2022] Open
Abstract
Steroid hormones modulate development, reproduction and communication in eukaryotes. The widespread occurrence and persistence of steroid hormones have attracted public attention due to their endocrine-disrupting effects on both wildlife and human beings. Bacteria are responsible for mineralizing steroids from the biosphere. Aerobic degradation of steroid hormones relies on O2 as a co-substrate of oxygenases to activate and to cleave the recalcitrant steroidal core ring. To date, two oxygen-dependent degradation pathways - the 9,10-seco pathway for androgens and the 4,5-seco pathways for oestrogens - have been characterized. Under anaerobic conditions, denitrifying bacteria adopt the 2,3-seco pathway to degrade different steroid structures. Recent meta-omics revealed that microorganisms able to degrade steroids are highly diverse and ubiquitous in different ecosystems. This review also summarizes culture-independent approaches using the characteristic metabolites and catabolic genes to monitor steroid biodegradation in various ecosystems.
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Affiliation(s)
- Yin‐Ru Chiang
- Biodiversity Research CenterAcademia SinicaTaipei115Taiwan
| | | | - Po‐Hsiang Wang
- Biodiversity Research CenterAcademia SinicaTaipei115Taiwan
- Present address:
Earth‐Life Science InstituteTokyo Institute of TechnologyTokyoJapan
| | - Pei‐Hsun Wu
- Graduate Institute of Environmental EngineeringNational Taiwan UniversityTaipei106Taiwan
| | - Chang‐Ping Yu
- Graduate Institute of Environmental EngineeringNational Taiwan UniversityTaipei106Taiwan
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Wu J, Cheng ZH, Min D, Cheng L, He RL, Liu DF, Li WW. CRISPRi System as an Efficient, Simple Platform for Rapid Identification of Genes Involved in Pollutant Transformation by Aeromonas hydrophila. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:3306-3315. [PMID: 32109355 DOI: 10.1021/acs.est.9b07191] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Aeromonas species are indigenous in diverse aquatic environments and play important roles in environmental remediation. However, the pollutant transformation mechanisms of these bacteria remain elusive, and their potential in pollution control is largely unexploited so far. In this work, we report an efficient and simple genome regulation tool to edit Aeromonas hydrophila and identify its biomolecular pathways for pollutant transformation. The genome regulation system, which is based on the type II clustered regularly interspaced short palindromic repeat interference (CRISPRi) system from Streptococcus pyogenes, can serve as a reversible and multiplexible platform for gene knockdown in A. hydrophila. A single-plasmid CRISPRi system harboring both dCas9 and the sgRNA was constructed in A. hydrophila and used to silence diverse genes with varied sizes and expression levels. With this system, up to 467-fold repression of gfp expression was achieved, and the function of the essential gene-ftsZ was identified quickly and accurately. Furthermore, simultaneous transcriptional repression of multiple targeted genes was realized. We discovered that the ars operon played an essential role in arsenic detoxification, and the extracellular electron transfer (EET) pathway was involved in methyl orange reduction, but not in vanadium reduction by A. hydrophila. Our method allows better insights and effective genetic manipulation of the pollutant transformation processes in Aeromonas, which might facilitate more efficient utilization of the Aeromonas species and other microbial species for environmental remediation applications.
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Affiliation(s)
- Jie Wu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science & Technology of China, Hefei, 230026, P. R. China
| | - Zhou-Hua Cheng
- School of Life Sciences, University of Science & Technology of China, Hefei, 230026, P. R. China
| | - Di Min
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science & Technology of China, Hefei, 230026, P. R. China
| | - Lei Cheng
- School of Life Sciences, University of Science & Technology of China, Hefei, 230026, P. R. China
| | - Ru-Li He
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science & Technology of China, Hefei, 230026, P. R. China
| | - Dong-Feng Liu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science & Technology of China, Hefei, 230026, P. R. China
| | - Wen-Wei Li
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science & Technology of China, Hefei, 230026, P. R. China
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Liu S, Su H, Li HX, Liu JJ, Lin L, Xu XR, Zuo LZ, Zhao JL. Uptake, Elimination, and Biotransformation Potential of a Progestagen (Cyproterone Acetate) in Tilapia Exposed at an Environmental Concentration. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:6804-6813. [PMID: 31117546 DOI: 10.1021/acs.est.9b02891] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Although the distribution of progestagens in aquatic environments has been widely reported, details on their uptake, elimination, and biotransformation in fish have received little attention. This study investigated the uptake, elimination, and biotransformation potential of a progestagen, cyproterone acetate (CPTA), in Nile tilapia ( Oreochromis niloticus) exposed to an environmentally relevant concentration under semistatic regimes. CPTA in tilapia tissues followed a similar pattern, reaching a concentration plateau within 4 days of exposure, and dropping to below limits of quantitation within 4 days of elimination. The calculated steady-state bioconcentration factors suggest a low bioconcentration potential of CPTA in juvenile tilapia. Results of enzymatic hydrolysis treatments revealed that no conjugates of CPTA were present in tissues, but conjugated biotransformation products of CPTA were found in bile, liver, and muscle. Most CPTA entered tissues and then was biotransformed into seven different products by phase I and phase II metabolism. The concentrations of endogenous cortisol were significantly influenced by CPTA in plasma and liver during the uptake period. These findings suggest that biotransformation products of CPTA should be considered for the assessment of the bioconcentration potential and ecological effects of progestagens.
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Affiliation(s)
- Shan Liu
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou 510301 , P. R. China
| | - Haochang Su
- Key Laboratory of South China Sea Fishery Resources Exploitation and Utilization, Ministry of Agriculture and Rural Affairs , South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences , Guangzhou 510300 , P. R. China
| | - Heng-Xiang Li
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou 510301 , P. R. China
| | - Jin-Jun Liu
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou 510301 , P. R. China
- University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Lang Lin
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou 510301 , P. R. China
- University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Xiang-Rong Xu
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou 510301 , P. R. China
| | - Lin-Zi Zuo
- Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou 510301 , P. R. China
| | - Jian-Liang Zhao
- The Environmental Research Institute, MOE Key Laboratory of Theoretical Chemistry of Environment , South China Normal University , Guangzhou 510006 , P. R. China
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9
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Song S, Wang P, Liu Y, Zhao D, Leng X, An S. Effects of Oenanthe javanica on Nitrogen Removal in Free-Water Surface Constructed Wetlands under Low-Temperature Conditions. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16081420. [PMID: 31010264 PMCID: PMC6518158 DOI: 10.3390/ijerph16081420] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/02/2019] [Accepted: 04/08/2019] [Indexed: 11/16/2022]
Abstract
To investigate the role and microorganism-related mechanisms of macrophytes and assess the feasibility of Oenanthe javanica (Blume) DC. in promoting nitrogen removal in free-water surface constructed wetlands (FWS-CWS) under low temperatures (<10 °C), pilot-scale FWS-CWS, planted with O. javanica, were set up and run for batch wastewater treatment in eastern China during winter. The presence of macrophytes observably improved the removal rates of ammonia nitrogen (65%-71%) and total nitrogen (41%-48%) (p < 0.05), with a sharp increase in chemical oxygen demand concentrations (about 3-4 times). Compared to the unplanted systems, the planted systems not only exhibited higher richness and diversity of microorganisms, but also significantly higher abundances of bacteria, ammonia monooxygenase gene (amoA), nitrous oxide reductase gene (nosZ), dissimilatory cd1-containing nitrite reductase gene (nirS), and dissimilatory copper-containing nitrite reductase gene (nirK) in the substrate. Meanwhile, the analysis of the microbial community composition further revealed significant differences. The results indicate that enhanced abundances of microorganisms, and the key functional genes involved with nitrogen metabolism in the planted systems played critical roles in nitrogen removal from wastewater in FWS-CWS. Furthermore, abundant carbon release from the wetland macrophytes could potentially aid nitrogen removal in FWS-CWS during winter.
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Affiliation(s)
- Siyuan Song
- Institute of Wetland Ecology, School of Life Science, Nanjing University, Nanjing 210046, China; (S.S.); (P.W.); (Y.L.); (X.L.); (S.A.)
- Nanjing University Ecology Research Institute of Changshu (NJUecoRICH), Changshu 215500, China
| | - Penghe Wang
- Institute of Wetland Ecology, School of Life Science, Nanjing University, Nanjing 210046, China; (S.S.); (P.W.); (Y.L.); (X.L.); (S.A.)
- Shanghai Investigation, Design & Research Institute Co., Ltd. (SIDRI), Shanghai 200434, China
| | - Yongxia Liu
- Institute of Wetland Ecology, School of Life Science, Nanjing University, Nanjing 210046, China; (S.S.); (P.W.); (Y.L.); (X.L.); (S.A.)
| | - Dehua Zhao
- Institute of Wetland Ecology, School of Life Science, Nanjing University, Nanjing 210046, China; (S.S.); (P.W.); (Y.L.); (X.L.); (S.A.)
- Nanjing University Ecology Research Institute of Changshu (NJUecoRICH), Changshu 215500, China
- Correspondence: ; Tel.: +86-25-89681309
| | - Xin Leng
- Institute of Wetland Ecology, School of Life Science, Nanjing University, Nanjing 210046, China; (S.S.); (P.W.); (Y.L.); (X.L.); (S.A.)
- Nanjing University Ecology Research Institute of Changshu (NJUecoRICH), Changshu 215500, China
| | - Shuqing An
- Institute of Wetland Ecology, School of Life Science, Nanjing University, Nanjing 210046, China; (S.S.); (P.W.); (Y.L.); (X.L.); (S.A.)
- Nanjing University Ecology Research Institute of Changshu (NJUecoRICH), Changshu 215500, China
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Sabouni R, Gomaa H. Photocatalytic degradation of pharmaceutical micro-pollutants using ZnO. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:5372-5380. [PMID: 30628002 DOI: 10.1007/s11356-018-4051-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 12/19/2018] [Indexed: 06/09/2023]
Abstract
This research paper presents the results of an experimental investigation of the degradation of three different contaminants including progesterone (PGS), ibuprofen (IBU), and naproxen (NAP) using ZnO as the photocatalyst and ultraviolet (UV) light as a source for catalysts activation. Two operating parameters, namely, catalyst loading and initial concentration of contaminants, were tested in a batch photocatalytic reactor. To demonstrate the large-scale applications, experiments were also conducted in a submerged membrane photocatalytic reactor. It has proven that ZnO photocatalyst degraded the three contaminants very efficiently under almost all the studied experimental conditions, with efficiency rates of 92.3, 94.5, and 98.7 % for PSG, IBU, and NAP, respectively. The photodegradation kinetics study was performed to calculate the reaction rate constant, which is found to follow pseudo-first order kinetics. The membrane photocatalytic reactor was efficient to remove pollutants and it is observed that the degradation rate increases with increasing the membrane oscillation frequency approaching that of the stirred reactor.
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Affiliation(s)
- Rana Sabouni
- Department of Chemical Engineering, American University of Sharjah, P.O. Box: 26666, Sharjah, United Arab Emirates.
| | - Hassan Gomaa
- Department of Chemical and Biochemical Engineering, University of Western Ontario, London, Ontario, N6A 5B9, Canada
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11
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Xiao Y, Zheng Y, Wu S, Zhang EH, Chen Z, Liang P, Huang X, Yang ZH, Ng IS, Chen BY, Zhao F. Pyrosequencing Reveals a Core Community of Anodic Bacterial Biofilms in Bioelectrochemical Systems from China. Front Microbiol 2015; 6:1410. [PMID: 26733958 PMCID: PMC4679932 DOI: 10.3389/fmicb.2015.01410] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 11/27/2015] [Indexed: 01/31/2023] Open
Abstract
Bioelectrochemical systems (BESs) are promising technologies for energy and product recovery coupled with wastewater treatment, and the core microbial community in electrochemically active biofilm in BESs remains controversy. In the present study, 7 anodic communities from 6 bioelectrochemical systems in 4 labs in southeast, north and south-central of China are explored by 454 pyrosequencing. A total of 251,225 effective sequences are obtained for 7 electrochemically active biofilm samples at 3% cutoff level. While Alpha-, Beta-, and Gamma-proteobacteria are the most abundant classes (averaging 16.0-17.7%), Bacteroidia and Clostridia are the two sub-dominant and commonly shared classes. Six commonly shared genera i.e., Azospira, Azospirillum, Acinetobacter, Bacteroides, Geobacter, Pseudomonas, and Rhodopseudomonas dominate the electrochemically active communities and are defined as core genera. A total of 25 OTUs with average relative abundance >0.5% were selected and designated as core OTUs, and some species relating to these OTUs have been reported electrochemically active. Furthermore, cyclic voltammetry and chronoamperometry tests show that two strains from Acinetobacter guillouiae and Stappia indica, bacteria relate to two core OTUs, are electrochemically active. Using randomly selected bioelectrochemical systems, the study has presented extremely diverse bacterial communities in anodic biofilms, though, we still can suggest some potentially microbes for investigating the electrochemical mechanisms in bioelectrochemical systems.
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Affiliation(s)
- Yong Xiao
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of SciencesXiamen, China
| | - Yue Zheng
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of SciencesXiamen, China
- College of Environmental Science and Engineering, Hunan UniversityChangsha, China
| | - Song Wu
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of SciencesXiamen, China
- College of Environmental Science and Engineering, Hunan UniversityChangsha, China
| | - En-Hua Zhang
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of SciencesXiamen, China
- College of Environmental Science and Engineering, Hunan UniversityChangsha, China
| | - Zheng Chen
- Research Center for Eco-Environmental Sciences, Chinese Academy of SciencesBeijing, China
| | - Peng Liang
- School of Environment, Tsinghua UniversityBeijing, China
| | - Xia Huang
- School of Environment, Tsinghua UniversityBeijing, China
| | - Zhao-Hui Yang
- College of Environmental Science and Engineering, Hunan UniversityChangsha, China
| | - I-Son Ng
- Department of Chemical Engineering, National Cheng Kung UniversityTainan, Taiwan
| | - Bor-Yann Chen
- Department of Chemical and Materials Engineering, National I-Lan UniversityI-Lan, Taiwan
| | - Feng Zhao
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of SciencesXiamen, China
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