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Registros recuperados: 251
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A survey on the composition of wines made with grapes produced by an organic system. Repositório Alice
MIELE, A.; RIZZON, L. A.; QUEIROZ, S. C. do N. de.
Summary There is concern about the health problems caused by pesticides in humans, which has led some grape producers to adopt organic procedures in their vineyards, and a certain amount of these grapes are directed to winemaking. Despite the approval awarded to this organic grape production by the certified organizations, there has been a demand to carry out a survey to determine the physicochemical composition of the wine derived from these products. Some of these wines were made from a single grape variety and others from more than one. For this survey, the samples consisted of five bottles of each type of wine, acquired from wineries and supermarkets in the Serra Gaúcha region, RS, Brazil. The analyses were carried out by physicochemical methods:...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Vitis Spp; Agricultura orgânica; Vinhedos; Metal; Metal pesado; Mineral; Resíduo; Viticultura; Minerals; Heavy metals; Pesticide residues.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1047106
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Absorcao e distribuicao de cadmio e micronutrientes em cultivares de feijoeiro expostas a doses de cadmio. Repositório Alice
NASCIMENTO, C. W. A. do; PEREIRA, J. B. M..
Visando avaliar os efeitos de doses crescentes de cadmio em solucao nutritiva sobre a absorcao e a translocacao de Cd, Zn, Fe, Mn e Cu por plantas de feijoeiro (Phaseolus vulgaris L.), foi montado um ensaio em casa de vegetacao utilizando-se as cultivares Ouro Negro e Carioca. As doses de Cd utilizadas foram: 0,0; 0,025; 0,05; 0,10 e 0,50 ug/mL, aplicadas em vasos de 4,8L contendo solucao nutritiva de Clark com metade da forca ionica original a pH 6,0. Verificou-se aumento na absorcao de Cd com o aumento das doses do elemento em solucao. As raizes acumularam maiores quantidades do metal que a parte aerea. As doses de Cd diminuiram os conteudos de Zn e de Mn nas raizes de ambas as cultivares, sem afetar, na mesma proporcao, a quantidade desses cations na...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Metais pesados; Phaseolus vulgaris; Feijao; Heavy metals.
Ano: 1997 URL: http://www.alice.cnptia.embrapa.br/handle/doc/84323
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Actividad antioxidante del alga Ulva fasciata Delile sometida a distintos niveles de contaminación marina OceanDocs
Hernández, Y.; Laguna, A.; Fernández, M.D.; Valdés, O.; Regalado, E.L..
Ha sido demostrado, por otros autores, que el alga Ulva fasciata Delile posee una actividad antioxidante promisoria y en el presente trabajo evaluamos si la actividad antioxidante de muestras de esta alga puede ser influenciada por la adsorción de metales, pesados y otros por parte del alga. U. fasciata fue colectada en tres zonas de las costas de la Ciudad de la Habana que presentan diferentes niveles de eutrofización: 1) la desembocadura del Río Quibú, un río que atraviesa una importante zona industrial de la capital cubana y en la cual la concentración de metales acumulados por el alga fue mayor; 2) la zona del Malecón habanero, que recibe la contaminación de la bahía de la Habana y del Río Almendares pero no de forma directa, donde presentó valores...
Tipo: Journal Contribution Palavras-chave: Algae; Marine environment; Heavy metals; Marine environment; Heavy metals; Algae; Http://aims.fao.org/aos/agrovoc/c_4610; Http://aims.fao.org/aos/agrovoc/c_2223; Http://aims.fao.org/aos/agrovoc/c_258.
Ano: 2008 URL: http://hdl.handle.net/1834/2919
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Acumulación de metales pesados en microcrustáceos planctónicos provenientes de un embalse contaminado por relaves mineros, embalse Rapel (34° 10' S - 71° 29' W), Chile OceanDocs
Mercado Leal, S.I..
El embalse Rapel, es un cuerpo de agua que está siendo sometido a un fuerte impacto antropogénico, por lo que evidencia severos signos de eutrofización. Esto último debido a que el embalse se ha transformado en el cuerpo receptor de una gran diversidad de efluentes (industriales, agrícolas y domésticos), que evacuan sus descargas sin ningún tipo de tratamiento. A lo cual se le debe agregar la recepción de aguas provenientes de los relaves de la mina de cobre “El Teniente”. Con el objetivo de determinar la presencia y acumulación de metales pesados en el agua y en los organismos zooplanctónicos, durante el mes de Octubre del 2003 se tomaron muestras de agua y de ejemplares de Ceriodaphnia dubia, Bosmina chilensis y Diaptomus diabolicus. Como especies...
Tipo: Theses and Dissertations Palavras-chave: Heavy metals; Freshwater pollution; Water reservoirs; Water analysis; X-ray spectroscopy; Zooplankton; Man-induced effects.
Ano: 2004 URL: http://hdl.handle.net/1834/4899
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Acúmulo de metais pesados em raízes de alface adubada com compostos de lixo urbano. Repositório Alice
CRAVO, M. da S.; MURAOKA, T..
Avaliacao do acumulo de metais pesados em raizes de alface, com o objetivo de orientar pesquisas com plantas, cujas raizes ou tuberculos saos comuns na alimentacao humana. Os resultados indicaram acumulo de materais considerados toxicos nas raizes de alface, significando alimento inadequado para a saude humana.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Adubacao organica; Brasil; Amazonas; Manaus; Plants; Manuring; Residues; Alface; Lactuca Sativa; Metal Pesado; Planta; Resíduo; Heavy metals; Organic matter.
Ano: 1996 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/669875
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Adsorção de cádmio e chumbo em solos tropicais altamente intemperizados. Repositório Alice
LINHARES, L.A.; EGREJA FILHO, F.B.; OLIVEIRA, C.V. de; BELLIS, V.M. de..
O objetivo deste trabalho foi determinar a capacidade de adsorção de cádmio e de chumbo e avaliar a influência das propriedades dos solos sobre os parâmetros de adsorção desses elementos em solos tropicais altamente intemperizados. Foram utilizados quatro Latossolos e um Argissolo. Amostras de 1 g de solo foram agitadas por 16 horas, com soluções de CaCl2 0,01 mol L-1, às quais foram adicionadas 0, 10, 20, 30, 40, 60 e 80 ?gámL-1 de cádmio e 0, 10, 20, 40, 60, 80, 100 e 120 ?gámL-1 de chumbo na forma de nitrato. As quantidades adsorvidas foram determinadas mediante análise dos elementos no sobrenadante, e os dados foram ajustados às isotermas de Langmuir e de Freundlich. Os resultados experimentais ajustaram-se aos modelos estudados. A adsorção máxima de...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Argissolo; Latossolo; Isoterma de adsorção; Metal pesado; Ultisol; Oxisol; Adsorption isotherm; Heavy metals.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/125775
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Adsorption of Cd, Cu, Ni and Zn in tropical soils under competitive and non-competitive systems Scientia Agricola
Moreira,Cindy Silva; Alleoni,Luís Reynaldo Ferracciú.
The adsorption of heavy metals in soils affects their behavior in the environment and their bioavailability to plants. The knowledge of the adsorption mechanisms in competitive systems allows a more realistic evaluation of the metals' behavior in the soil than the single metal adsorption. The objectives of this study were (i) to evaluate Cd, Cu, Ni, and Zn adsorption in 14 surface samples (0-0.2 m) of representative soils of the Brazilian humid-tropical region, in competitive and non-competitive systems, and (ii) to establish metal affinity sequences for each soil, based in the maximum adsorption capacity (MAC) estimated by the Langmuir model. The Rhodic Eutrudox, the Kandiudalf Eutrudox, the Arenic Hapludalf, the Arenic Hapludult and the Typic Argiudoll...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metals; Competition; Tropical soil.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000300008
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Air quality assessment in different urban areas from Rio Grande do Sul state, Brazil, using lichen transplants Anais da ABC (AABC)
KOCH,NATÁLIA MOSSMANN; LUCHETA,FABIANE; KÄFFER,MÁRCIA ISABEL; MARTINS,SUZANA MARIA DE AZEVEDO; VARGAS,VERA MARIA FERRÃO.
Abstract Based on the need to monitor air pollution and on the importance of doing it with biological organisms, the present work had as main objective to assess air quality in urban areas through lichen transplants. Besides, we also tested whether there were differences among the studied sites, aiming to point out the main pollution characteristics of the areas. The monitoring was carried out in seven cities, which varied from mainly rural to mainly industrial, in Rio Grande do Sul, southern Brazil. The foliose lichen Parmotrema tinctorum was used as the biomonitor species. Physiological tests and contents of sulphur and heavy metals were measured in the lichen thalli. Other pollutants assessed through air samplers were available for some cities, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Air pollution; Biomonitoring; Greenhouse gases; Heavy metals; Lichenized fungi; Particulate matter.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000502233
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Análisis de contaminantes inorgánicos tóxicos en las aguas del Rio Almendares, Cuba OceanDocs
Rodríguez, A.J.; Arpajón, I.; Castaño, Z.; Marsán, R.; Lugo, D.; Roevros, N.; Chou, L.; Rojas, N.; Heydrich, M..
The Almendares River constitutes the most important superficial stream in Cuban capital, that finishes in the Metropolitan Park of Havana, which is an entertaining centre. The objective of this work is to determine the presence of toxic inorganic pollutants in the Almendares River water. 10 samplings were carried out from June 2003 to May 2004 in 14 stations established along the last 10 km of the river and 3 tributaries. The quantification of nitrates, nitrites and ammonium was done by spectrophotometric methods The concentration of heavy metals in the dissolved and particulate phase was determined by atomic emission spectrometry. The total microbial charge was determined by epifluorescency. Were found high levels of ammonium and nitrites, as well as high...
Tipo: Proceedings Paper Palavras-chave: Rivers; Freshwater pollution; Heavy metals; Rivers; Heavy metals; Http://aims.fao.org/aos/agrovoc/c_6617; Http://aims.fao.org/aos/agrovoc/c_2223.
Ano: 2006 URL: http://hdl.handle.net/1834/2086
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Application of a bacterial extracellular polymeric substance in heavy metal adsorption in a co-contaminated aqueous system BJM
Martins,Paula Salles de Oliveira; Almeida,Narcisa Furtado de; Leite,Selma Gomes Ferreira.
The application of a bacterial extracellular polymeric substance (EPS) in the bioremediation of heavy metals (Cd, Zn and Cu) by a microbial consortium in a hydrocarbon co-contaminated aqueous system was studied. At the low concentrations used in this work (1.00 ppm of each metal), it was not observed an inhibitory effect on the cellular growing. In the other hand, the application of the EPS lead to a lower concentration of the free heavy metals in solution, once a great part of them is adsorbed in the polymeric matrix (87.12% of Cd; 19.82% of Zn; and 37.64% of Cu), when compared to what is adsorbed or internalized by biomass (5.35% of Cd; 47.35% of Zn; and 24.93% of Cu). It was noted an increase of 24% in the consumption of ethylbenzene, among the gasoline...
Tipo: Info:eu-repo/semantics/article Palavras-chave: EPS; Co-contamination; Heavy metals; Natural attenuation.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000400034
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Aprovechamiento de la humedad atmosférica como fuente no convencional de agua para uso doméstico. Colegio de Postgraduados
Bautista Olivas, Ana Laura.
En esta investigación se plantearon tres objetivos generales los cuales fueron: 1) Proponer un modelo matemático para predecir la cantidad de agua atmosférica que se puede obtener con el prototipo CP-HID-04 en la Ciudad de México considerando la humedad relativa del ambiente y temperatura ambiental; estos modelos se validaron calculando los siguientes índices: MBE (error medio), RMBE (raíz cuadrada del error cuadrático, D (Índice de acuerdo), R2 (coeficiente de determinación). 2) Cuantificar la cantidad de coliformes totales y fecales encontradas en muestras de agua atmosférica obtenidos en tres sitios de estudio: San Felipe Hidalgo, Tlaxcala; Huichapan, Hidalgo y en la Ciudad de México. 3) Evaluar la calidad del agua obtenida de la atmósfera,...
Palavras-chave: Agua atmosférica; Modelo matemático; Calidad de agua; Coliformes fecales; Metales pesados; Atmospheric water; Mathematical model; Water quality; Fecal coliform; Heavy metals; Hidrociencias; Doctorado.
Ano: 2013 URL: http://hdl.handle.net/10521/2008
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Arsenic toxicity in Acacia mangium WILLD. and Mimosa caesalpiniaefolia BENTH. Seedlings. Repositório Alice
CIPRIANI, H. N.; DIAS, L. E.; COSTA, M. D.; CAMPOS, N. V.; AZEVEDO, A. A.; GOMES, R. J.; FIALHO, I. F.; AMEZQUITA, S. P. M..
Acacia mangium and Mimosa caesalpiniaefolia are fast-growing woody fabaceous species that might be suitable for phytoremediation of arsenic (As)- contaminated sites. To date, few studies on their tolerance to As toxicity have been published. Therefore, this study assessed As toxicity symptoms in A. mangium and M. caesalpiniaefolia seedlings under As stress in a greenhouse. Seedlings of Acacia mangium and M. caesalpiniaefolia were grown for 120 d in an Oxisol-sand mixture with 0, 50, 100, 200, and 400 mg kg-1 As, in four replications in four randomized blocks. The plants were assessed for visible toxicity symptoms, dry matter production, shoot/root ratio, root anatomy and As uptake. Analyses of variance and regression showed that the growth of A. mangium...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Arsenate; Heavy metals; Phytoremediation; Root anatomy; Soil contamination; Contaminação do solo; Metais pesados; Anatomia radicular; Fitorremediação.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/974289
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Arsenic toxicity in Acacia mangium willd. and mimosa Caesalpiniaefolia benth. seedlings Rev. Bras. Ciênc. Solo
Cipriani,Henrique Nery; Dias,Luiz Eduardo; Costa,Maurício Dutra; Campos,Naiara Viana; Azevedo,Aristéa Alves; Gomes,Roberto Junio; Fialho,Izabela Ferreira; Amezquita,Sandra Patrícia Montealegre.
Acacia mangium and Mimosa caesalpiniaefolia are fast-growing woody fabaceous species that might be suitable for phytoremediation of arsenic (As)-contaminated sites. To date, few studies on their tolerance to As toxicity have been published. Therefore, this study assessed As toxicity symptoms in A. mangium and M. caesalpiniaefolia seedlings under As stress in a greenhouse. Seedlings of Acacia mangium and M. caesalpiniaefolia were grown for 120 d in an Oxisol-sand mixture with 0, 50, 100, 200, and 400 mg kg-1 As, in four replications in four randomized blocks. The plants were assessed for visible toxicity symptoms, dry matter production, shoot/root ratio, root anatomy and As uptake. Analyses of variance and regression showed that the growth of A. mangium and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Arsenate; Heavy metals; Phytoremediation; Root anatomy; Soil contamination.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000500031
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Assessment of heavy metals and nonessential content of some edible and soft tissues OceanDocs
Ahdy, H.H.H.; Abdallah, A.M.; Tayel, F.T..
The level concentrations of heavy metals (essential and nonessential) were measured in different marine biota including cephalopoda, bivalve, crustacean and fish. The results reveal that these organisms show more or less the same order of distribution for each of the metals studied. The average concentrations of heavy metals exhibited the following decreasing order: cephalopoda > bivalve > crustacean > fish. The levels of metals in all studied samples are still comparable to those in their corresponding in the Mediterranean Sea. K (98-181μg/g) and Ca (547-1472 μg/g) were present at the highest concentrations in all investigated samples. Octopus and Sepia do not follow the general pattern. The highest value of Metal Pollution Index (MPI) in...
Tipo: Journal Contribution Palavras-chave: Field Study; Heavy metals; Marine crustaceans; Fish; Heavy metals; Fish; Http://aims.fao.org/aos/agrovoc/c_2223; Http://aims.fao.org/aos/agrovoc/c_15903.
Ano: 2007 URL: http://hdl.handle.net/1834/1898
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Assessment of Trace Element Contents in Soils and Water from Cerrado Wetlands, Triângulo Mineiro Region Rev. Bras. Ciênc. Solo
Ribeiro,Bruno Teixeira; Nascimento,Diogo Costa; Curi,Nilton; Guilherme,Luiz Roberto Guimarães; Costa,Enio Tarso de Souza; Lopes,Guilherme; Carneiro,João Paulo.
ABSTRACT In the Brazilian Cerrado biome, there are wetlands locally known as “Veredas”, which are swampy plains between hills and rivers. Since the 1970’s, the Cerrado biome has been gradually converted to livestock, crop, or forestry production. Until now, very few studies were conducted to evaluate the baseline contents of trace elements in Cerrado wetland soils. Due to their position in the landscape (bottom lands), the wetlands are potentially susceptible to contamination by runoff and/or leaching from surrounding areas at higher altitudes. This work evaluated the As, Cd, Pb, Ni, Zn, Cu, Mn, and Fe contents in soils from six wetlands (undisturbed and disturbed) in the Minas Gerais Triangle region, Brazil. In each wetland, we collected topsoil samples...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Waterlogged soils; Soil contamination; Tropical soils; Heavy metals.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100515
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Avaliação da presença de metais pesados em nove méis produzidos e comercializados no Distrito Federal. Repositório Alice
ROSA-CAMPOS, A. A.; ROCHA, J. E. da S.; BORGO, L. A.; SILVA, M. S. da..
Resumo: O mel brasileiro é produzido principalmente por abelhas africanizadas a partir do néctar ou da secreção das plantas e, devido às suas características genéticas dessas espécies de abelhas, dispensa o uso de antibióticos e pesticidas, como acaricidas e fungicidas. A composição das amostras de méis está intimamente relacionada com o tipo de florada utilizada por estas abelhas para a elaboração do produto final. Um dos componentes de grande importância são os minerais presentes no mel que representam de 0,02% a 1%. Dentre estes minerais observamos os chamados metais pesados, que podem indicar tanto a origem geográfica do mel quanto o nível de poluição ambiental por estes metais. Logo, faz-se necessário a pesquisa da presença ou não de metais pesados...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Abelha; Mel; Metal pesado; Chumbo; Cobre; Cromo; Níquel; Zinco; Honey bees; Honey; Heavy metals; Lead; Copper; Chromium; Nickel; Zinc.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/handle/doc/977384
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Avaliação de biossólido de águas servidas domiciliares como adubo em couve. Repositório Alice
ROCHA, R.E.M. da; PIMENTEL, M.S.; ZAGO, V.C.P.; RUMJANEK, N.G.; DE-POLLI, H..
O objetivo deste trabalho foi avaliar o biossólido e proveniente da estação de tratamento de águas servidas domiciliares, como adubo no cultivo da couve (Brassica oleraceae var. acephala, grupo Georgia). O trabalho foi em delineamento de blocos ao acaso, com três tratamentos de adubação, esterco bovino, biossólido e uréia, com quatro repetições. Amostras de solo de cada tratamento foram analisadas quanto a parâmetros químicos, microbiológicos e parasitológicos. Os níveis de metais pesados encontravam-se abaixo dos permitidos pela legislação internacional. Após 54 dias da incorporação do biossólido ao solo, os coliformes fecais eram praticamente nulos e, a partir dos 60 dias, não foram mais encontradas amostras positivas com ovos de helmintos, apesar do...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Lodo de esgoto; Metal pesado; Patógeno; Helminto; Coliforme fecal; Sewage sludge; Heavy metals; Pathogens; Helminths; Faecal coliforms.
Ano: 2003 URL: http://www.alice.cnptia.embrapa.br/handle/doc/109693
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Background levels of some trace elements in weathered soils from the Brazilian Northern region Scientia Agricola
Fadigas,Francisco Souza; Amaral Sobrinho,Nelson Moura Brasil do; Anjos,Lucia Helena Cunha dos; Mazur,Nelson.
Soils formed from the Barreiras Group sediments, located mainly along the coast of Brazil Northern and Northeastern regions, generally present low concentrations of iron oxides and total organic carbon, high quantities of quartz in the sand fraction, and kaolinitic clay mineralogy. The objective of the present study was to quantify the pseudo total concentrations of Cd, Co, Cu, Cr, Mn, Ni, Zn and Fe in Xhantic Udox and Xhantic Udult soils derived from these sediments. The reference sites were covered by native vegetation and located in the States of Pará and Amapá, Brazil. Multiple linear regression analysis was applied to determine correlations between soil parameters and the levels of these metals. The best correlation was obtained between Fe, Mn, clay,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Udox; Udult; Heavy metals; Metal soil estimation; Multiple linear regression.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000100008
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Barium and sodium in sunflower plants cultivated in soil treated with wastes of drilling of oil well AGRIAMBI
Sampaio Junior,Jésus; Amaral,Nelson M. B. do; Zonta,Everaldo; Magalhães,Marcio O. L..
ABSTRACTThis study aimed to evaluate the effects of the application of two types of oil drilling wastes on the development and absorption of barium (Ba) and sodium (Na) by sunflower plants. The waste materials were generated during the drilling of the 7-MGP-98D-BA oil well, located in the state of Bahia, Brazil. The treatments consisted of: Control – without Ba application, comprising only its natural levels in the soil; Corrected control – with fertilization and without wastes; and the Ba doses of 300, 3000 and 6000 mg kg-1, which were equivalent to the applications of 16.6, 165.9 and 331.8 Mg ha-1 of waste from the dryer, and 2.6, 25.7 and 51.3 Mg ha-1 of waste from the centrifugal. Plants cultivated using the first dose of dryer waste and the second...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metals; Helliantus annus; Salinization.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001101100
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Bioaccumulation and chemical forms of cadmium, copper and lead in aquatic plants BABT
Hu,JinZhao; Zheng,AiZhen; Pei,DongLi; Shi,GuoXin.
The cadmium(Cd), copper(Cu) and lead(Pb) accumulation, as well as their relative content of different chemical forms in Sagittaria sagittifolia L. and Potamogeton crispus L. were determined. The results showed that both the plants had the ability to accumulate large amounts of Cd, Cu and Pb, and they absorbed metals in dose-dependent manners. The roots of S. sagittifolia appeared more sensitive to Cd and Pb than the leaves of P. crispus. The potential of Cu uptake by these two plant tissues was similar. Under the same concentration, the uptake of Cu for both the plants was higher than Pb and Cd, while that of Pb was lowest. The Cd, Cu and Pb existed with various forms in the plants. Cd and Pb were mainly in the NaCl extractable form in S. sagittifolia and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metals; Phytoextraction; Macrophytes; Sagittaria sagittifolia L.; Potamogeton crispus L..
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100029
Registros recuperados: 251
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