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排序方式: 共有154条查询结果,搜索用时 343 毫秒
81.
Luis Américo Conti Carlos Alberto S. Araujo Fernando S. Paolo Roberto L. Barcellos Marcelo Rodrigues Michel M. Mahiques Valdenir V. Furtado 《Journal of Coastal Conservation》2012,16(1):13-24
The aim of this work is to use GIS integration data to characterize sedimentary processes in a SubTropical lagoon environment.
The study area was the Cananéia Inlet estuary in the southeastern section of the Cananéia Lagoon Estuarine System (CLES), state of S?o Paulo, Brazil (25°03′S/47°53′W). The area is formed by the confluence of two estuarine channels forming a
bay-shaped water body locally called “Trapandé Bay”. The region is surrounded by one of the most preserved tracts of Atlantic Rain Forest in Southwestern Brazil and presents
well-developed mangroves and marshes. In this study a methodology was developed using integrated a GIS database based on bottom
sediment parameters, geomorphological data, remote sensing images, Hidrodynamical Modeling data and geophysical parameters.
The sediment grain size parameters and the bottom morphology of the lagoon were also used to develop models of net sediment
transport pathways. It was possible to observe that the sediment transport vectors based on the grain size model had a good
correlation with the transport model based on the bottom topography features and Hydrodynamic model, especially in areas with
stronger energetic conditions, with a minor contribution of finer sediments. This relation is somewhat less evident near shallower
banks and depositional features. In these regions the organic matter contents in the sediments was a good complementary tool
for inferring the hydrodynamic and depositional conditions (i.e. primary productivity, sedimentation rates, sources, oxi-reduction rates). 相似文献
82.
Virmond E De Sena RF Albrecht W Althoff CA Moreira RF José HJ 《Waste management (New York, N.Y.)》2012,32(10):1952-1961
In the present work, selected agroindustrial solid residues from Brazil – biosolids from meat processing wastewater treatment and mixture of sawdust with these biosolids; residues from apple and orange juice industries; sugarcane bagasse; açaí kernels (Euterpe oleracea) and rice husk – were characterised as solid fuels and an evaluation of their properties, including proximate and ultimate composition, energy content, thermal behaviour, composition and fusibility of the ashes was performed. The lower heating value of the biomasses ranged from 14.31 MJ kg?1 to 29.14 MJ kg?1, on a dry and ash free basis (daf), all presenting high volatile matter content, varying between 70.57 wt.% and 85.36 wt.% (daf) what improves the thermochemical conversion of the solids. The fouling and slagging tendency of the ashes was predicted based on the fuel ash composition and on the ash fusibility correlations proposed in the literature, which is important to the project and operation of biomass conversion systems. The potential for application of the Brazilian agroindustrial solid residues studied as alternative energy sources in thermochemical processes has been identified, especially concerning direct combustion for steam generation. 相似文献
83.
Geraldo Da Silva e Souza Ricardo Coelho De Faria Tito Belchior S. Moreira 《Journal of the American Water Resources Association》2007,43(5):1237-1244
Abstract: This paper assesses cost efficiencies of Brazilian public and private companies of water supply. To measure the efficiency, we used a stochastic frontier model derived from the translog family – a specification similar to a Cobb‐Douglas including a quadratic term in log output. The model parameters are estimated by maximum likelihood using Brazilian data for the year 2002. Statistical inference leads to the conclusion that there is no evidence that private firms and public firms are significantly different in terms of efficiency measurements. 相似文献
84.
Ana L. Armendariz Melina A. Talano Ana L. Wevar Oller María I. Medin Elizabeth Agostini 《环境科学学报(英文版)》2015,27(7):203-210
Bacterial ability to colonize the rhizosphere of plants in arsenic (As) contaminated soils is highly important for symbiotic and free-living plant growth-promoting rhizobacteria (PGPR) used as inoculants, since they can contribute to enhance plant As tolerance and limit metalloid uptake by plants. The aim of this work was to study the effect of As on growth, exopolysaccharide (EPS) production, biofilm formation and motility of two strains used as soybean inoculants, Bradyrhizobium japonicum E109 and Azospirillum brasilense Az39. The metabolism of arsenate (As(V)) and arsenite (As(III)) and their removal and/or possible accumulation were also evaluated. The behavior of both bacteria under As treatment was compared and discussed in relation to their potential for colonizing plant rhizosphere with high content of the metalloid. B. japonicum E109 growth was reduced with As(III) concentration from 10 μM while A. brasilense Az39 showed a reduction of growth with As(III) from 500 μM. EPS and biofilm production increased significantly under 25 μM As(III) for both strains. Moreover, this was more notorious for Azospirillum under 500 μM As(III), where motility was seriously affected. Both bacterial strains showed a similar ability to reduce As(V). However, Azospirillum was able to oxidize more As(III) (around 53%) than Bradyrhizobium (17%). In addition, both strains accumulated As in cell biomass. The behavior of Azospirillum under As treatments suggests that this strain would be able to colonize efficiently As contaminated soils. In this way, inoculation with A. brasilense Az39 would positively contribute to promoting growth of different plant species under As treatment. 相似文献
85.
Kitamura Rafael Shinji Akiyama Brito Júlio César Moreira Silva de Assis Helena Cristina Gomes Marcelo Pedrosa 《Environmental science and pollution research international》2023,30(1):622-639
Environmental Science and Pollution Research - Ciprofloxacin (Cipro) water contamination is a global concern, having reached disturbing concentrations and threatening the aquatic ecosystems. We... 相似文献
86.
Moreira Wardleison Martins Moreira Paula Valéria Viotti dos Santos Débora Federici Gimenes Marcelino Luiz Vieira Melissa Gurgel Adeodato 《Environmental science and pollution research international》2023,30(8):19564-19591
Environmental Science and Pollution Research - The lignocellulose biorefinery industry has assumed an important role within the current scenario. Lignin is an abundant and available biopolymer and... 相似文献
87.
Pavão Diogo C. Porteiro João Ventura Maria A. Borges Silva Lurdes Medeiros António Moniz Ana Moura Mónica Moreira Francisco Silva Luís 《Environment, Development and Sustainability》2021,23(11):16504-16528
Environment, Development and Sustainability - Tourists have become increasingly interested in certain aspects of their destination, including landscape and biodiversity elements, thereby promoting... 相似文献
88.
Khaniabadi Yuef Omidi Fanelli Roberto De Marco Alessandra Daryanoosh Seyed Mohammad Kloog Itai Hopke Philip K. Conti Gea Oliveri Ferrante Margherita Mohammadi Mohammad Javad Babaei Ali Akbar Basiri Hassan Goudarzi Gholamreza 《Environmental science and pollution research international》2017,24(20):16860-16868
Environmental Science and Pollution Research - The main objective of this study was to assess the possible effects of airborne particulate matter less than 10 μm in diameter (PM10)... 相似文献
89.
Mendes Bruna de Oliveira Rabelo Letícia Martins e Silva Bianca Costa de Souza Joyce Moreira da Silva Castro André Luis da Silva Anderson Rodrigo de Lima Rodrigues Aline Sueli Malafaia Guilherme 《Environmental science and pollution research international》2017,24(23):19234-19248
Environmental Science and Pollution Research - The current study has assessed whether the oral and/or dermal exposure of C57Bl/6 J mice to tannery effluent (a complex pollutant consisting of... 相似文献
90.
Sánchez-Ccoyllo OR Ynoue RY Martins LD Astolfo R Miranda RM Freitas ED Borges AS Fornaro A Freitas H Moreira A Andrade MF 《Environmental monitoring and assessment》2009,149(1-4):241-249
In the metropolitan area of S?o Paulo, Brazil, ozone and particulate matter (PM) are the air pollutants that pose the greatest threat to air quality, since the PM and the ozone precursors (nitrogen oxides and volatile organic compounds) are the main source of air pollution from vehicular emissions. Vehicular emissions can be measured inside road tunnels, and those measurements can provide information about emission factors of in-use vehicles. Emission factors are used to estimate vehicular emissions and are described as the amount of species emitted per vehicle distance driven or per volume of fuel consumed. This study presents emission factor data for fine particles, coarse particles, inhalable particulate matter and black carbon, as well as size distribution data for inhalable particulate matter, as measured in March and May of 2004, respectively, in the Janio Quadros and Maria Maluf road tunnels, both located in S?o Paulo. The Janio Quadros tunnel carries mainly light-duty vehicles, whereas the Maria Maluf tunnel carries light-duty and heavy-duty vehicles. In the Janio Quadros tunnel, the estimated light-duty vehicle emission factors for the trace elements copper and bromine were 261 and 220 microg km(-1), respectively, and 16, 197, 127 and 92 mg km(-1), respectively, for black carbon, inhalable particulate matter, coarse particles and fine particles. The mean contribution of heavy-duty vehicles to the emissions of black carbon, inhalable particulate matter, coarse particles and fine particles was, respectively 29, 4, 6 and 6 times higher than that of light-duty vehicles. The inhalable particulate matter emission factor for heavy-duty vehicles was 1.2 times higher than that found during dynamometer testing. In general, the particle emissions in S?o Paulo tunnels are higher than those found in other cities of the world. 相似文献