Base de dados : MEDLINE
Pesquisa : B01.650.940.800.575.912.250.618.050.875 [Categoria DeCS]
Referências encontradas : 392 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 40 ir para página                         

  1 / 392 MEDLINE  
              next record last record
seleciona
para imprimir
Fotocópia
[PMID]:29431314
[Au] Autor:Baktybaeva ZB; Suleymanov RA; Yamalov SM; Kulagin AA; Valeev TK; Rakhmatullin NR
[Ti] Título:[Evaluation of the content and migration of heavy metals in components of river ecosystems' of mining territories of the Republic of Bashkortostan].
[So] Source:Gig Sanit;95(9):822-7, 2016.
[Is] ISSN:0016-9900
[Cp] País de publicação:Russia (Federation)
[La] Idioma:rus
[Ab] Resumo:Exploration and development of mineral deposits in the Transurals of the Republic of Bashkortostan are accompanied by a comprehensive environmental impact. Ones of the most vulnerable elements of the landscape are the surface water bodies used for fishery purposes, recreation and household needs of the population. Extraction and processing of ores lead to the contamination of aquatic ecosystems by heavy metals (HM), which by passing into a pond, can actively be involved in the cycling of matter and migrate via food chains to the human under the consumption of fish products. Possessing by cumulative properties, HM can express mutagenic, teratogenic and carcinogenic properties. The aim of research was the study of the impact of mining facilities on the content of the priority HM in the components of river ecosystems in the Transurals of the Republic of Bashkortostan and the development of a complex of preventive measures on the improvement of the human environment. There was studied the content of Zn, Cu and Cd in the water, bottom sediments and phytomass of Elodea canadensis Michx. The measurements of mass concentrations of metals were performed by stripping voltammetry with the use of the STA device. The results showed that for the cross-sections there is typical the following descending series of elements in the river components: Zn > Cu > Cd. In water samples there is observed the exceedance of standards for water bodies of potable, cultural and community water use and fishery basins. The concentration of zinc varies in the range of 0.016-5.24 mg/dm; copper - 0.0024-0.095 mg/dm; cadmium - 0.0001-0.019 mg/dm. In bottom sediments, in general, the content of metals in comparison with control plots is increased to the tenfold value. The meaning of mobile forms of zinc in the ground varies in the range of 0.81-9.62 mg/kg; copper - 0.12-18.69 mg/kg; cadmium - 0.00013-0.092 mg/kg. The zinc concentration in above-ground phytomass of Elodea canadensis compared to control increases by 2-3.5 times, copper - 4-8 times, cadmium - 2-7 times. Univariate analysis of variance confirmed the accuracy of the impact of the degree of contamination on the accumulation of metals by Elodea canadensis. The results testify to the potential danger to health of water bodies of the region's population.
[Mh] Termos MeSH primário: Monitorização de Parâmetros Ecológicos
Água Doce
Metais Pesados
Rios/química
Poluição da Água
[Mh] Termos MeSH secundário: Bashkiria/epidemiologia
Monitorização de Parâmetros Ecológicos/métodos
Monitorização de Parâmetros Ecológicos/estatística & dados numéricos
Água Doce/análise
Água Doce/química
Seres Humanos
Hydrocharitaceae/química
Metais Pesados/análise
Metais Pesados/química
Mineração/normas
Saúde da População/estatística & dados numéricos
Saúde Pública/métodos
Saúde Pública/normas
Poluentes Químicos da Água/análise
Poluentes Químicos da Água/química
Poluição da Água/efeitos adversos
Poluição da Água/análise
Poluição da Água/prevenção & controle
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Metals, Heavy); 0 (Water Pollutants, Chemical)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180213
[St] Status:MEDLINE


  2 / 392 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29101854
[Au] Autor:Gong L; Zhang S; Chen D; Liu K; Lu J
[Ad] Endereço:Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing, 210098, China.
[Ti] Título:Response of biofilms-leaves of two submerged macrophytes to high ammonium.
[So] Source:Chemosphere;192:152-160, 2018 Feb.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Submerged macrophytes can provide attached surface for biofilms (known as periphyton) growth. In the present study, the alterations in biofilms formation, and chemical compositions and physiological responses were investigated on leaves of Vallisneria asiatica and Hydrilla verticillata exposed to 0.1 mg L (control) or with 10 mg L NH -N for 13 days. Results from physiological and biochemical indices (content of H O , malondialdehyde, total chlorophyll and activity of superoxide dismutase, catalase and peroxidase) showed that high ammonium caused oxidative damage to leaves of two species of plant. Multifractal analysis (based on scanning electron microscope images) showed that for the same plant, the values of width â–³α (â–³α = α -α ) of the f(α) and Δf (Δf = f(α )-f(α )) were smaller on leaves surface of two species of plant treated with 10 mg L NH -N for 13 days than their controls, suggesting high ammonium treatments reduced morphological heterogeneity of leaf surface and enhanced area of the colony-like biofilms. X-ray photoelectron spectroscopy analysis showed that C, O, N and P were dominant elements on leaves surface of two species of plant and ammonium application increased the percentage of C but decreased that of O. High ammonium increased C1 (C-C or C-H) percentage but decreased C2 (C-O) and C3 (O-C-O or C=O) percentage on leaves surface of two species of plant, indicating that ammonium stress changed the surface chemical states and thus might reduce the capacity of leaves to adsorb nutrients from water column. Our results provided useful information to understand ammonium induced toxicity to submerged macrophytes.
[Mh] Termos MeSH primário: Compostos de Amônio/metabolismo
Hydrocharitaceae/fisiologia
Folhas de Planta/fisiologia
[Mh] Termos MeSH secundário: Biofilmes
Catalase/metabolismo
Clorofila/metabolismo
Hydrocharitaceae/enzimologia
Hydrocharitaceae/crescimento & desenvolvimento
Malondialdeído/metabolismo
Peroxidases/metabolismo
Folhas de Planta/enzimologia
Folhas de Planta/crescimento & desenvolvimento
Proteínas de Plantas/metabolismo
Superóxido Dismutase/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ammonium Compounds); 0 (Plant Proteins); 1406-65-1 (Chlorophyll); 4Y8F71G49Q (Malondialdehyde); EC 1.11.1.- (Peroxidases); EC 1.11.1.6 (Catalase); EC 1.15.1.1 (Superoxide Dismutase)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180123
[Lr] Data última revisão:
180123
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171105
[St] Status:MEDLINE


  3 / 392 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28704565
[Au] Autor:Deyanova D; Gullström M; Lyimo LD; Dahl M; Hamisi MI; Mtolera MSP; Björk M
[Ad] Endereço:Seagrass Ecology & Physiology Research Group, Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.
[Ti] Título:Contribution of seagrass plants to CO2 capture in a tropical seagrass meadow under experimental disturbance.
[So] Source:PLoS One;12(7):e0181386, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Coastal vegetative habitats are known to be highly productive environments with a high ability to capture and store carbon. During disturbance this important function could be compromised as plant photosynthetic capacity, biomass, and/or growth are reduced. To evaluate effects of disturbance on CO2 capture in plants we performed a five-month manipulative experiment in a tropical seagrass (Thalassia hemprichii) meadow exposed to two intensity levels of shading and simulated grazing. We assessed CO2 capture potential (as net CO2 fixation) using areal productivity calculated from continuous measurements of diel photosynthetic rates, and estimates of plant morphology, biomass and productivity/respiration (P/R) ratios (from the literature). To better understand the plant capacity to coping with level of disturbance we also measured plant growth and resource allocation. We observed substantial reductions in seagrass areal productivity, biomass, and leaf area that together resulted in a negative daily carbon balance in the two shading treatments as well as in the high-intensity simulated grazing treatment. Additionally, based on the concentrations of soluble carbohydrates and starch in the rhizomes, we found that the main reserve sources for plant growth were reduced in all treatments except for the low-intensity simulated grazing treatment. If permanent, these combined adverse effects will reduce the plants' resilience and capacity to recover after disturbance. This might in turn have long-lasting and devastating effects on important ecosystem functions, including the carbon sequestration capacity of the seagrass system.
[Mh] Termos MeSH primário: Organismos Aquáticos
Dióxido de Carbono/metabolismo
Ecossistema
Pradaria
[Mh] Termos MeSH secundário: Alismatales/crescimento & desenvolvimento
Biomassa
Sequestro de Carbono/fisiologia
Hydrocharitaceae/crescimento & desenvolvimento
Desenvolvimento Vegetal
Brotos de Planta/crescimento & desenvolvimento
Projetos de Pesquisa
Tanzânia
Clima Tropical
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
142M471B3J (Carbon Dioxide)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170714
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0181386


  4 / 392 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28545148
[Au] Autor:Petersen G; Cuenca A; Zervas A; Ross GT; Graham SW; Barrett CF; Davis JI; Seberg O
[Ad] Endereço:Natural History Museum of Denmark, University of Copenhagen, Copenhagen, Denmark.
[Ti] Título:Mitochondrial genome evolution in Alismatales: Size reduction and extensive loss of ribosomal protein genes.
[So] Source:PLoS One;12(5):e0177606, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The order Alismatales is a hotspot for evolution of plant mitochondrial genomes characterized by remarkable differences in genome size, substitution rates, RNA editing, retrotranscription, gene loss and intron loss. Here we have sequenced the complete mitogenomes of Zostera marina and Stratiotes aloides, which together with previously sequenced mitogenomes from Butomus and Spirodela, provide new evolutionary evidence of genome size reduction, gene loss and transfer to the nucleus. The Zostera mitogenome includes a large portion of DNA transferred from the plastome, yet it is the smallest known mitogenome from a non-parasitic plant. Using a broad sample of the Alismatales, the evolutionary history of ribosomal protein gene loss is analyzed. In Zostera almost all ribosomal protein genes are lost from the mitogenome, but only some can be found in the nucleus.
[Mh] Termos MeSH primário: Alismatales/genética
Genoma Mitocondrial
Mitocôndrias/genética
Proteínas Ribossômicas/genética
[Mh] Termos MeSH secundário: Alismatales/classificação
Evolução Biológica
Mapeamento Cromossômico
DNA de Plantas/química
DNA de Plantas/metabolismo
Hydrocharitaceae/genética
Mitocôndrias/metabolismo
Filogenia
Análise de Sequência de DNA
Zosteraceae/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Plant); 0 (Ribosomal Proteins)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170526
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0177606


  5 / 392 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28505209
[Au] Autor:Kim YK; Kim SH; Yi JM; Kang CK; Short F; Lee KS
[Ad] Endereço:Department of Biological Sciences, Pusan National University, Busan, Republic of Korea.
[Ti] Título:Genetic identification and evolutionary trends of the seagrass Halophila nipponica in temperate coastal waters of Korea.
[So] Source:PLoS One;12(5):e0177772, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Although seagrass species in the genus Halophila are generally distributed in tropical or subtropical regions, H. nipponica has been reported to occur in temperate coastal waters of the northwestern Pacific. Because H. nipponica occurs only in the warm temperate areas influenced by the Kuroshio Current and shows a tropical seasonal growth pattern, such as severely restricted growth in low water temperatures, it was hypothesized that this temperate Halophila species diverged from tropical species in the relatively recent evolutionary past. We used a phylogenetic analysis of internal transcribed spacer (ITS) regions to examine the genetic variability and evolutionary trend of H. nipponica. ITS sequences of H. nipponica from various locations in Korea and Japan were identical or showed very low sequence divergence (less than 3-base pair, bp, difference), confirming that H. nipponica from Japan and Korea are the same species. Halophila species in the section Halophila, which have simple phyllotaxy (a pair of petiolate leaves at the rhizome node), were separated into five well-supported clades by maximum parsimony analysis. H. nipponica grouped with H. okinawensis and H. gaudichaudii from the subtropical regions in the same clade, the latter two species having quite low ITS sequence divergence from H. nipponica (7-15-bp). H. nipponica in Clade I diverged 2.95 ± 1.08 million years ago from species in Clade II, which includes H. ovalis. According to geographical distribution and genetic similarity, H. nipponica appears to have diverged from a tropical species like H. ovalis and adapted to warm temperate environments. The results of divergence time estimates suggest that the temperate H. nipponica is an older species than the subtropical H. okinawensis and H. gaudichaudii and they may have different evolutionary histories.
[Mh] Termos MeSH primário: Evolução Molecular
Hydrocharitaceae/genética
Água do Mar
Temperatura Ambiente
[Mh] Termos MeSH secundário: DNA Espaçador Ribossômico
Genes de Plantas
Variação Genética
Hydrocharitaceae/classificação
Filogenia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Ribosomal Spacer)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170920
[Lr] Data última revisão:
170920
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170516
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0177772


  6 / 392 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28333049
[Au] Autor:Yi ZJ; Yao J; Zhu MJ; Chen HL; Wang F; Liu X
[Ad] Endereço:School of Civil and Environmental Engineering, and National International Cooperation Base on Environment and Energy, University of Science and Technology Beijing, Xueyuan Road No. 30, Haidian District, Beijing 100083, China E-mail: yaojun@ustb.edu.cn; Key Laboratory of Functional Organometallic Mat
[Ti] Título:Uranium biosorption from aqueous solution by the submerged aquatic plant Hydrilla verticillata.
[So] Source:Water Sci Technol;75(5-6):1332-1341, 2017 03.
[Is] ISSN:0273-1223
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The biosorption characteristics of U(VI) from aqueous solution onto a nonliving aquatic macrophyte, Hydrilla verticillata (dry powder), were investigated under various experimental conditions by using batch methods. Results showed that the adsorption reached equilibrium within 60 min and the experimental data were well fitted by the pseudo-first-order kinetic model. U(VI) adsorption was strongly pH dependent, and the optimum pH for U(VI) removal was 5.5. Isotherm adsorption data displayed good correlation with the Langmuir model, with a maximum monolayer adsorption capacity of 171.52 mg/g. Thermodynamic studies suggested that U(VI) adsorption onto H. verticillata was an exothermic and spontaneous process in nature. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy indicated that the amino and hydroxyl groups on the algal surface played an important role in U(VI) adsorption. The mechanisms responsible for U(VI) adsorption could involve electrostatic attraction and ion exchange. In conclusion, H. verticillata biomass showed good potential as an adsorption material for the removal of uranium contaminants in aqueous solution.
[Mh] Termos MeSH primário: Hydrocharitaceae/metabolismo
Urânio/isolamento & purificação
[Mh] Termos MeSH secundário: Adsorção
Biodegradação Ambiental
Biomassa
Hydrocharitaceae/ultraestrutura
Concentração de Íons de Hidrogênio
Cinética
Espectroscopia Fotoeletrônica
Soluções
Espectroscopia de Infravermelho com Transformada de Fourier
Termodinâmica
Fatores de Tempo
Poluentes Químicos da Água/isolamento & purificação
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Solutions); 0 (Water Pollutants, Chemical); 4OC371KSTK (Uranium)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171102
[Lr] Data última revisão:
171102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170324
[St] Status:MEDLINE
[do] DOI:10.2166/wst.2016.592


  7 / 392 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28144862
[Au] Autor:Chen J; Hu X; Cao T; Zhang X; Xi Y; Wen X; Su H; de Silva W; Zhu T; Ni L; Xie P
[Ad] Endereço:Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Chinese Academy of Sciences, No. 7 Donghu South Road, Wuhan, 430072,, China.
[Ti] Título:Root-foraging behavior ensures the integrated growth of Vallisneria natans in heterogeneous sediments.
[So] Source:Environ Sci Pollut Res Int;24(9):8108-8119, 2017 Mar.
[Is] ISSN:1614-7499
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The present study was carried out to determine the efficacy of root foraging and the physiological response of Vallisnaria natans grown in heterogeneous sediments. V. natans was cultivated in two homogeneous and two heterogeneous sediments. The results suggested that V. natans grown in heterogeneous sediments presented a significantly higher root proportion in its total biomass, exhibited root foraging, and grew well, as indicated by a total biomass, ramet number, and plant height very close to those of plants grown in nutrient-rich clay sediment. Moreover, the more sensitive physiological response of the roots than the stems or the leaves to sediment nutrients suggested that root foraging occurred, and the approached values between the two heterogeneous sediments and the homogeneous clay sediment indicated that V. natans could satisfy its nutrient requirements via root foraging. The results may be useful in the recovery of macrophytes that remodel part (rather than all) of the substrate and can potentially improve habitats that are unsuitable for plant growth.
[Mh] Termos MeSH primário: Hydrocharitaceae/crescimento & desenvolvimento
Raízes de Plantas/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: Biomassa
Sedimentos Geológicos
Folhas de Planta/crescimento & desenvolvimento
Caules de Planta/crescimento & desenvolvimento
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1705
[Cu] Atualização por classe:171104
[Lr] Data última revisão:
171104
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170202
[St] Status:MEDLINE
[do] DOI:10.1007/s11356-017-8473-z


  8 / 392 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28044182
[Au] Autor:Kuiper JJ; Verhofstad MJ; Louwers EL; Bakker ES; Brederveld RJ; van Gerven LP; Janssen AB; de Klein JJ; Mooij WM
[Ad] Endereço:Department of Aquatic Ecology, Netherlands Institute of Ecology, P.O. Box 50, Wageningen, 6700 AB, The Netherlands. jankuiper87@gmail.com.
[Ti] Título:Mowing Submerged Macrophytes in Shallow Lakes with Alternative Stable States: Battling the Good Guys?
[So] Source:Environ Manage;59(4):619-634, 2017 Apr.
[Is] ISSN:1432-1009
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Submerged macrophytes play an important role in maintaining good water quality in shallow lakes. Yet extensive stands easily interfere with various services provided by these lakes, and harvesting is increasingly applied as a management measure. Because shallow lakes may possess alternative stable states over a wide range of environmental conditions, designing a successful mowing strategy is challenging, given the important role of macrophytes in stabilizing the clear water state. In this study, the integrated ecosystem model PCLake is used to explore the consequences of mowing, in terms of reducing nuisance and ecosystem stability, for a wide range of external nutrient loadings, mowing intensities and timings. Elodea is used as a model species. Additionally, we use PCLake to estimate how much phosphorus is removed with the harvested biomass, and evaluate the long-term effect of harvesting. Our model indicates that mowing can temporarily reduce nuisance caused by submerged plants in the first weeks after cutting, particularly when external nutrient loading is fairly low. The risk of instigating a regime shift can be tempered by mowing halfway the growing season when the resilience of the system is highest, as our model showed. Up to half of the phosphorus entering the system can potentially be removed along with the harvested biomass. As a result, prolonged mowing can prevent an oligo-to mesotrophic lake from becoming eutrophic to a certain extent, as our model shows that the critical nutrient loading, where the lake shifts to the turbid phytoplankton-dominated state, can be slightly increased.
[Mh] Termos MeSH primário: Conservação dos Recursos Naturais/métodos
Ecossistema
Hydrocharitaceae/crescimento & desenvolvimento
Lagos/química
Modelos Teóricos
Fitoplâncton/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: Biomassa
Fósforo/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
27YLU75U4W (Phosphorus)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170807
[Lr] Data última revisão:
170807
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170104
[St] Status:MEDLINE
[do] DOI:10.1007/s00267-016-0811-2


  9 / 392 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28028700
[Au] Autor:Polechonska L; Samecka-Cymerman A; Dambiec M
[Ad] Endereço:Department of Ecology, Biogeochemistry, and Environmental Protection, University of Wroclaw, ul. Kanonia 6/8, 50-328, Wroclaw, Poland. ludmila.polechonska@uwr.edu.pl.
[Ti] Título:Changes in growth rate and macroelement and trace element accumulation in Hydrocharis morsus-ranae L. during the growing season in relation to environmental contamination.
[So] Source:Environ Sci Pollut Res Int;24(6):5439-5451, 2017 Feb.
[Is] ISSN:1614-7499
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The temporal variations in plant chemistry connected with its life cycle may affect the cycling of elements in an ecosystem as well as determine the usefulness of the species in phytoremediation and bioindication. In this context, there is a gap in knowledge on the role of floating plants for elements cycling in aquatic reservoirs. The aim of the study was to determine if there are variations in Hydrocharis morsus-ranae (European frog-bit) bioaccumulation capacity and the growth rate of its population during the growing season and to test the impact of environmental pollution on these features. The content of macroelements (Ca, K, Mg, N, Na, P, S) and trace metals (Cd, Co, Cu, Cr, Hg, Fe, Mn, Ni, Pb, Zn) was determined in H. morsus-ranae collected monthly from June to October from habitats differing in environmental contamination. The results showed that the highest content of most trace metals (Co, Cr, Cu, Hg, Mn, Ni, Zn) and some nutrients (N, P) in plants as well as the greatest bioaccumulation efficiency occurred simultaneously in the beginning of the growing season. In the following months, a dilution effect (manifested by a decrease in content) related to the rapid growth was observed. Co, Mn, and Ni content in plant tissues reflected the level of environmental contamination throughout the growing season which makes H. morsus-ranae a potential biomonitor of pollution for these metals. Considering the great bioaccumulation ability, high sensitivity to contamination, and low biomass of European frog-bit in polluted systems, further investigation is required to assess the real phytoremediation capability of the species.
[Mh] Termos MeSH primário: Biodegradação Ambiental
Hydrocharitaceae
Metais Pesados
Oligoelementos
[Mh] Termos MeSH secundário: Biomassa
Ecossistema
Monitoramento Ambiental
Mercúrio
Estações do Ano
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Metals, Heavy); 0 (Trace Elements); FXS1BY2PGL (Mercury)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:171104
[Lr] Data última revisão:
171104
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161229
[St] Status:MEDLINE
[do] DOI:10.1007/s11356-016-8258-9


  10 / 392 MEDLINE  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:27864130
[Au] Autor:Oon YL; Ong SA; Ho LN; Wong YS; Dahalan FA; Oon YS; Lehl HK; Thung WE; Nordin N
[Ad] Endereço:Water Research Group (WAREG), School of Environmental Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
[Ti] Título:Role of macrophyte and effect of supplementary aeration in up-flow constructed wetland-microbial fuel cell for simultaneous wastewater treatment and energy recovery.
[So] Source:Bioresour Technol;224:265-275, 2017 Jan.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:This study investigates the role of plant (Elodea nuttallii) and effect of supplementary aeration on wastewater treatment and bioelectricity generation in an up-flow constructed wetland-microbial fuel cell (UFCW-MFC). Aeration rates were varied from 1900 to 0mL/min and a control reactor was operated without supplementary aeration. 600mL/min was the optimum aeration flow rate to achieve highest energy recovery as the oxygen was sufficient to use as terminal electron acceptor for electrical current generation. The maximum voltage output, power density, normalized energy recovery and Coulombic efficiency were 545.77±25mV, 184.75±7.50mW/m , 204.49W/kg COD, 1.29W/m and 10.28%, respectively. The variation of aeration flow rates influenced the NO and NH removal differently as nitrification and denitrification involved conflicting requirement. In terms of wastewater treatment performance, at 60mL/min aeration rate, UFCW-MFC achieved 50 and 81% of NO and NH removal, respectively. E. nuttallii enhanced nitrification by 17% and significantly contributed to bioelectricity generation.
[Mh] Termos MeSH primário: Fontes de Energia Bioelétrica
Hydrocharitaceae/fisiologia
Eliminação de Resíduos Líquidos/métodos
Zonas Úmidas
[Mh] Termos MeSH secundário: Desnitrificação
Desenho de Equipamento
Nitrificação
Oxigênio
Eliminação de Resíduos Líquidos/instrumentação
Águas Residuais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Waste Water); S88TT14065 (Oxygen)
[Em] Mês de entrada:1702
[Cu] Atualização por classe:170213
[Lr] Data última revisão:
170213
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161120
[St] Status:MEDLINE



página 1 de 40 ir para página                         
   


Refinar a pesquisa
  Base de dados : MEDLINE Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde