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| Registros recuperados: 47 | |
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| Gomes,Silvânia M. de S.; Lima,Vera Lucia A. de; Souza,Adailson P. de; Nascimento,Joab J. V. R. do; Nascimento,Everaldo S. do. |
| Plants respond to environmental adversities, becoming an indicator for assessing the environment quality. In this aspect, chlorophyll contents as well, carotenoids are used as a reliable indicator to associate environmental quality and pollution, mainly regarding the toxicity of heavy metals in higher plants. So, we aimed to evaluate the content of chlorophyll a, b, and total chlorophylls and carotenoids in plants vetiver [Vetiveria zizanioides (L.) Nash], maize (Zea mays L.) cv. AG 1051, sunflower (Helianthus annuus L.) cv. BRS 122/V-2000, and castor beans (Ricinus communis L. ) cv . Northeastern BRS grown in contaminated soil with lead, with and without correction of soil pH, so they were used as indicators of metal stress by the soil. From the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy metal; Pollution; Photosynthesis. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000500007 |
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| Remor,Marcelo B.; Sampaio,Silvio C.; Model,Kathleen J.; Falco,Thais D.; Prudente,Victor H. R.. |
| ABSTRACT Many studies have determined the concentration of trace elements in river sediments in Brazil. Notwithstanding, mercury assessments are scarce, especially because of exclusive extraction techniques and expensive analysis techniques. Still, this element is known for its toxicity, persistence, and bioaccumulation, making its presence in the environment an important factor for biota and human health. For this reason, the objective of this study was to determine the mercury concentration in the sediment of the Pelotas River basin, located on the border of the states of Santa Catarina and Rio Grande do Sul. The sediment was collected at eight locations of the Pelotas basin and, after drying, the mercury was quantified by atomic absorption spectrometry... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy metal; Trace element; Multivariate statistics. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000100117 |
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| Romeo, Michele; Mathieu, A; Gnassia-barelli, M; Romana, Louis-alexandre; Lafaurie, M. |
| Trace metal concentrations (Cd, Cu, Fe, Zn) and total-calcium content were measured in the gills of 2 marine fish (painted comber Serranus cabrilla and striped mullet Mullus barbatus) sampled in different stations in the cove of Cortiou, where the outlet collecting the waste waters of Marseille, France, is situated (NW Mediterranean). In parallel, the activity rates of some phase I enzymes (ethoxyresorufin-0-dealkylase, EROD; pentoxyresorufin-0-dealkylase, PROD) and phase II enzymes (glutathione-S-transferase, GST) were determined in the livers of both species of fish. Cadmium and copper concentrations were highly variable for both species. Two sampling stations situated in the dispersion area of waste waters seemed affected by chemical pollution. At these... |
| Tipo: Text |
Palavras-chave: Heavy metal; Biotransformation enzymes; Fish. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00196/30736/29393.pdf |
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| KHURSHID,S.; SHOAIB,A.; JAVAID,A.; QAISAR,U.. |
| ABSTRACT The present study was conducted to assess antifungal potential of the allelopathic grass Cenchrus pennisetiformis Hochst. & Steud. against the fungal plant pathogen Fusarium oxysporum f. sp. lycopersici (cause of tomato wilt disease) under chromium stress. Laboratory experiments were performed in 10 mL volume glass test tubes each containing 1.0 mL of malt extract broth with seven concentrations (0, 50, 100, 150, 200, 250, 300 and 350 ppm) of each of Cr(III) and Cr(VI), and two concentrations (5% and 6%) of methanolic leaf, stem or root extract of C. pennisetiformis. A metal + weed extract amended medium was inoculated with the pathogen and incubated for 7 days at 25 C. Different concentrations of Cr(III) and Cr(VI) proved equally inhibitory... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Grass; Heavy metal; Poaceae; Wilt pathogen. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300453 |
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| Kray,Claudio Henrique; Tedesco,Marino José; Bissani,Carlos Alberto; Gianello,Clesio; Silva,Kelly Justin da. |
| Tannery residues and coal mine waste are heavily polluting sources in Brazil, mainly in the Southern States of Rio Grande do Sul and Santa Catarina. In order to study the effects of residues of chrome leather tanning (sludge and leather shavings) and coal waste on soybean and maize crops, a field experiment is in progress since 1996, at the Federal University of Rio Grande do Sul Experimental Station, county of Eldorado do Sul, Brazil. The residues were applied twice (growing seasons 1996/97 and 1999/00). The amounts of tannery residues were applied according to their neutralizing value, at rates of up to 86.8 t ha-1, supplying from 671 to 1.342 kg ha-1 Cr(III); coal waste was applied at a total rate of 164 t ha-1. Crop yield and dry matter production were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chromium tannery sludge; Leather shavings; Coal mine; Heavy metal. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832008000700035 |
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| Santos,Joseany Andrade; Nunes,Luís Alfredo Pinheiro Leal; Melo,Wanderley José de; Figueiredo,Marcia Barreto do Vale; Singh,Rajeev Pratap; Bezerra,Antônio Aécio Carvalho; Araújo,Ademir Sérgio Ferreira de. |
| Tannery wastes generation is increasing every year and a suitable method for tannery sludge management is necessary in order to decrease this environmental problem. The composting is recognized as a suitable method for sludge recycling.. The effect of tannery sludge compost (TSC) rates on growth, nodulation and N fixation of cowpea was investigated. Sandy and clayey soils were amended with TSC at rates of 0, 7.5, 15, 30, and 60 t ha-1. The shoot dry weight of cowpea plants 45 days after emergence (DAE) was greater in the TSC-amended than in the unamended soil. In the sandy soil, nodule dry weight increased with TSC application 45 DAE. In the clayey soil, 45 DAE, nodule dry weight decreased with TSC amendment levels greater than 7.5 t ha-1 compared to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Waste; Soil texture; Composting; Heavy metal. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000600003 |
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| Soares,Liliane Catone; Egreja Filho,Fernando Barboza; Windmoller,Cláudia Carvalhinho; Yoshida,Maria Irene. |
| Despite the considerable environmental importance of mercury (Hg), given its high toxicity and ability to contaminate large areas via atmospheric deposition, little is known about its activity in soils, especially tropical soils, in comparison with other heavy metals. This lack of information about Hg arises because analytical methods for determination of Hg are more laborious and expensive compared to methods for other heavy metals. The situation is even more precarious regarding speciation of Hg in soils since sequential extraction methods are also inefficient for this metal. The aim of this paper is to present a technique of thermal desorption associated with atomic absorption spectrometry, TDAAS, as an efficient tool for quantitative determination of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy metal; Analytical method; Weathered soils. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000401100 |
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| Nascimento,Silvânia Maria de Souza Gomes; Souza,Adailson Pereira de; Lima,Vera Lúcia Antunes de; Nascimento,Clístenes Williams Araújo do; Nascimento,Joab Josemar Vitor Ribeiro do. |
| ABSTRACT: High growth rate is one of the criteria used for the selection of species to be used in metal phytoextraction programs. This study was carried out to characterize the growth characteristics of sunflower (Helianthus annuus L.), castor bean (Ricinus communis L.), corn (Zea mays L), and vetiver [Vetiveria zizanioides (L.) Nash] grown on a soil contaminated with lead (Pb), with and without pH correction, to improve agronomic practices regarding phytoremediation programs. The experiment was designed as a randomized block with four replications; treatments were arranged in a split-plot arrangement, with the main plot representing the species (sunflower, castor bean, corn, and vetiver), with or without pH correction and soil fertilization, and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phytoremediation; Soil pollution; Heavy metal; Biological indicator. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100547 |
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| Scheid,Douglas L.; Marco,Rudinei D.; Grolli,André L.; Silva,Rodrigo F. da; Da Ros,Clovis O.; Andreazza,Robson. |
| ABSTRACT Zinc (Zn) is a micronutrient that is reaching toxic levels in the soil, with the intensification of agricultural and industrial activities. The objective of this study was to evaluate the growth, accumulation and tolerance of Erythrina crista-galli and Senna multijuga seedlings in soil with addition of increasing Zn levels. The study was conducted in a greenhouse for 120 days, using a completely randomized design in a 2 x 6 factorial arrangement, corresponding to two tree species (S. multijuga and E. crista-galli) and six doses of zinc in the soil (0, 200, 400, 600, 800 and 1000 mg kg-1) with six replicates. E. crista-galli and S. multijuga seedlings decreased root and shoot dry weight with increasing Zn doses. E. crista-galli and S. multijuga... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Native woody species; Heavy metal; Soil contamination; Phytostabilization. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000700465 |
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| Silva,Rodrigo F. da; Ros,Clovis O. Da; Scheid,Douglas L.; Grolli,André L.; Marco,Rudinei De; Missio,Evandro L.. |
| ABSTRACTHigh concentrations of copper (Cu) may be toxic to plants, yet some species can be tolerant to soils contaminated by this metal. The study aimed to evaluate Cu translocation and tolerance in seedlings of ‘timbaúva’ (Enterolobium contortisiliquum (Vell.) Morong), ‘pata-de-vaca’ (Bauhinia forficata Link) and ‘amendoim-bravo’ (Pterogyne nitensTul) subjected to Cu-contaminated soil. The study was conducted in a greenhouse for 120 days, using as substrate a clayey Oxisol. The experiment was set in a completely randomized design, using a 3 x 6 factorial scheme, corresponding to three forest species (‘timbaúva’, ‘pata-de-vaca’ and ‘amendoim-bravo’) and six Cu doses in the soil (0, 60, 120, 180, 240 and 300 mg kg-1), with six replicates. The following... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy metal; Phytoremediation; Reforestation; Soil cover. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001101093 |
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| Marco,Rudinei De; Silva,Rodrigo F. da; Ros,Clovis O. Da; Vanzam,Mateus; Boeno,Daniel. |
| ABSTRACT Phytoremediation is a technique that uses plants, whether associated or not to ameliorating agents, for phytostabilization of contaminated soil. The aim of this study was to evaluate the use of Senna multijuga associated with peat in the phytostabilization of copper contaminated soil. The experiment was carried out in a greenhouse for 120 days, using an entirely randomized design in a factorial arrangement (2 x 6), with and without peat (200 mL L-1 soil) and six doses of copper (0, 60, 120, 180, 240, 300 mg kg-1), with six repetitions of each treatment. At 120 days after seedling, the plants were evaluated for height, stem diameter, root and aerial dry matter, contents and accumulated amount of copper in the root system and aerial part. Also, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tree species; Heavy metal; Pau-cigarra; Soil decontamination. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000600421 |
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| Tito,Gilvanise A.; Chaves,Lucia H. G.; Guerra,Hugo O. C.; Soares,Frederico A. L.. |
| The objective of this study was to determine the effect of zinc, copper and cadmium on phytomass and grain production and to evaluate indirectly the adsorbent effect of bentonite clay by determining the accumulation of these heavy metals in bean plants. The study consisted of three separate experiments (one for each cation) with the application of three doses of bentonite (0, 30 and 60 t ha-1) in pots containing separately 50 mg of Zn; Cu and Cd kg-1 of soil, with three replicates. Thus, each experiment consisted of 9 experimental units. In each one, a bean plant was cultivated and after 65 days, samples of leaves, stems, roots and grains were collected. Afterwards, the samples were dried, weighed, grinded and the concentrations of Zn, Cu and Cd were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy metal; Clay; Vigna unguiculata L.. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662011000700003 |
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| Alves,Jailson do C.; Souza,Adailson P. de; Pôrto,Mônica L. A.; Fontes,Renildes L. F.; Arruda,Jandeilson; Marques,Luciano F.. |
| ABSTRACT Studies concerning the tolerance, absorption and distribution of heavy metals in plants are essential for the success of phytoremediation programs. The present study was carried out in order to evaluate the potential of the sunflower, castor bean, common buckwheat and vetiver as lead phytoaccumulators. The species were grown in nutrient solution containing increasing doses of Pb (0, 50, 100, 200 and 400 mg L-1) during a 30-day exposure period. A completely randomized split-plot design was used, with a 4 x 5 factorial and three replicates. Significant reductions of dry matter of the root, shoot and whole plant were found in the all species under study as a function of the increased Pb doses. Vetiver showed higher tolerance to Pb contamination;... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pollution; Heavy metal; Phytotoxicity; Tolerance; Phytoremediation. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000300243 |
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| Zalamena,Jovani; Melo,George W.; Santos,Henrique P.; Silva,Leandro S. da; Fialho,Flavio B.; Brunetto,Gustavo. |
| ABSTRACTThis study aimed to evaluate the performance of grapevine rootstocks under increasing levels of Zn in the soil and to identify physiological variables that can be used as indicators of excess of Zn in the soil. The rootstocks SO4, Paulsen1103, IAC572, IAC313 and 420A were grown in pots containing soil, which received Zn doses of 0, 20, 40, 80 or 160 mg kg-1 of soil. Dry matter (DM), Zn content in shoots and roots, chlorophyll index, initial fluorescence (Fo), maximum fluorescence (Fm), maximum quantum yield of photosystem II (Fv/Fm), effective quantum yield of photosystem II (Y-II) and non-photochemical quenching (NPQ) were evaluated. The increase of Zn levels in the soil decreased DM in all rootstocks, and IAC572 was superior to the others. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy metal; Toxicity; Chlorophyll fluorescence; Vitis spp.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001000973 |
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| Registros recuperados: 47 | |
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