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Registros recuperados: 6
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Differential behavior of the summer cover crops in the absorption and translocation of copper Ciência Rural
Vendruscolo,Diogo; Santana,Natielo Almeida; Souto,Kelen Müller; Ferreira,Paulo Ademar Avelar; Melo,George Wellington Bastos de; Jacques,Rodrigo Josemar Seminoti.
ABSTRACT: Phytoremediation is an alternative technique used to treat copper-contaminated soils. The objective of this research was to explore the behavior of nine summer cover crops regarding the growth, absorption and translocation of copper in soils with contamination levels exceeding the Value of Prevention, with a view to selecting plants for phytoremediation programs. In the experiments the Cambisol was contaminated with copper, added in doses of 0, 100, 200, 400, 500 and 600mg kg-1, in which the following nine plants were cultivated under greenhouse conditions: Canavalia ensiformis, Cajanus cajan, Dolichos lablad, Mucuna cinereum, Mucuna aterrima, Crotalaria juncea, Crotalaria spectabilis, Pennisetum glaucum and Paspalum notatum. At 90 days after...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metal; Soil pollution; Phytoremediation; Phytostabilization; Phytoextraction.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018001200251
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Growth of seedlings of pigeon pea (Cajanus cajan (l.) millsp), wand riverhemp (Sesbania virgata (cav.) pers.), and lead tree (Leucaena leucocephala (lam.) de wit) in an arsenic-contaminated soil Rev. Bras. Ciênc. Solo
Dias,Luiz Eduardo; Melo,Roseli Freire; Mello,Jaime Wilson Vargas de; Oliveira,Juraci Alves; Daniels,Walter Lee.
Phytoremediation strategies utilize plants to decontaminate or immobilize soil pollutants. Among soil pollutants, metalloid As is considered a primary concern as a toxic element to organisms. Arsenic concentrations in the soil result from anthropogenic activities such as: the use of pesticides (herbicides and fungicides); some fertilizers; Au, Pb, Cu and Ni mining; Fe and steel production; coal combustion; and as a bi-product during natural gas extraction. This study evaluated the potential of pigeon pea (Cajanus cajan), wand riverhemp (Sesbania virgata), and lead tree (Leucaena leucocephala) as phytoremediators of soils polluted by As. Soil samples were placed in plastic pots, incubated with different As doses (0; 50; 100 and 200 mg dm-3) and then sown...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Remediation; Decontamination; Phytoremediation; Phytostabilization.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300039
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Growth, tolerance and zinc accumulation in Senna multijuga and Erythrina crista-galli seedlings AGRIAMBI
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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Induced changes in the growth of four plant species due to lead toxicity AGRIAMBI
Batista,Adriana A.; Santos,Jorge A. G.; Bomfim,Marcela R.; Moreira,Flávia M.; Leal,Emylly F.; Conceição,Joseane N. da.
ABSTRACT Lead is a toxic metal that affects plant growth and the ecosystem. This study evaluated the lead (Pb) bioaccumulation potential of vetiver (Vetiveria zizanioides L.), sunflower (Helianthus annuus L.), elephant ear (Alocasia macrorrhiza) and ‘embaúba’ (Cecropia sp.). The plant species were tested in a 50% nutrient solution - Hoagland and Arnon, constantly aerated, containing five Pb concentrations: 0, 50, 100, 200 and 400 mg L-1). The treatments were arranged in a completely randomized design in a 4 x 5 factorial scheme, with four replicates. The Pb contents in the plants increased linearly with the Pb exposure concentration. Vetiver was the species with the highest Pb content in the shoots (260.24 mg kg-1) and sunflower, in the roots (44925.20 mg...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Trace metals; Remediation; Phytostabilization.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500327
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Silicato de cálcio como amenizante da toxidez de metais pesados em mudas de eucalipto. Repositório Alice
ACCIOLY, A.M. de A.; SOARES, C.R.F.S.; SIQUEIRA, J.O..
O objetivo deste trabalho foi avaliar o efeito do silicato de cálcio na redução da toxidez de metais pesados no solo para Eucalyptus camaldulensis. Foram utilizadas cinco doses de silicato de cálcio (0, 1,6, 3,2, 4,8 e 6,4 g kg-1), em solos com diferentes graus de contaminação. O experimento foi conduzido em vasos com 1,5 kg de solo, com uma muda por vaso, em esquema fatorial 4x5 (quatro graus de contaminação x cinco doses de silicato). O silicato de cálcio reduziu a toxidez de metais pesados em E. camaldulensis, retardou o aparecimento dos sintomas de toxidez e diminuiu os teores de zinco e cádmio na parte aérea das plantas. Entretanto, não evitou totalmente a depressão no crescimento, nos solos com contaminação elevada. O efeito amenizante do silicato...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Eucalyptus camaldulensis; Cádmio; Fitoestabilização; Fitotoxidez; Poluição do solo; Zinco; Cadmium; Phytostabilization; Phytotoxicity; Soil pollution; Zinc.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/125759
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Tolerance and prospection of phytoremediator woody species of Cd, Pb, Cu and Cr Braz. J. Plant Physiol.
Almeida,Alex-Alan F. de; Valle,Raúl R.; Mielke,Marcelo S.; Gomes,Fábio P..
High concentrations of Cd, Pb, Cu and Cr can cause harmful effects to the environment. These highly toxic pollutants constitute a risk for aquatic and terrestrial life. They are associated with diverse bioavailable geochemical fractions, like the water-soluble fraction and the exchangeable fraction, and non-available fractions like those associated with the crystalline net of clays and silica minerals. Depending upon their chemical and physical properties we can distinguish different mechanisms of metal toxicity in plants, such as production of reactive oxygen species from auto-oxidation, blocking and/or displacement of essential functional groups or metallic ions of biomolecules, changes in the permeability of cellular membranes, reactions of sulphydryl...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Decontamination; Heavy metals; Hyperaccumulation; Phytodegradation; Phytostabilization; Phytotoxicity.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202007000200001
Registros recuperados: 6
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