Avaliação da fitodisponibilidade de cádmio, chumbo e crômio, em soja cultivada em latossolo vermelho escuro tratado com fertilizantes comerciais

Gonçalves, Affonso Celso; Luchese, Eduardo Bernardi; Lenzi, Ervim

doi:10.1590/s0100-40422000000200006

Cited by 23 publications

(6 citation statements)

References 6 publications

(2 reference statements)

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“…This indicates that the Cd chemical form in this fertilizer was propably decisive in determining the Cd solubility and plant uptake. Other authors also found increases in Cd uptake by plants as a consequence of phosphate fertilizer applications (Mulla et al, 1980;Mortvedt, 1987;Silva, 1994;Gonçalves Jr. et al, 2000;Prochnow et al, 2001). Therefore, these results indicate that phosphate fertilizers can be an important via for Cd entry in the food chain.…”

Section: Resultsmentioning

confidence: 66%

Bioavailability of cadmium and lead in a soil amended with phosphorus fertilizers

Mendes

Duda

Nascimento

et al. 2006

Sci. agric. (Piracicaba, Braz.)

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Phosphorus fertilizers are essential to obtain high productivity, however, they contain heavy metals that can contaminate the soil and threat the health of animals and humans. The present study focused the determination of Cd and Pb concentrations in different phosphorus fertilizers as well as the absorption of these heavy metals by velvet green bean grown on soil amended with such fertilizers. The experiment was set up as a completely randomized design in a factorial scheme. The factors were four phosphorus sources (triple superphosphate-TS, Yorin thermophosphate-YT, Araxa rock phosphate-AP, and Gafsa rock phosphate-GP) applied at five rates (0, 92, 183, 275, and 366 kg ha -1 of P 2 O 5 ). The data obtained were submitted to variance and regression analysis. Lead availability to velvet bean was not altered as a result of fertilizer application. On the other hand, Cd uptake was significantly increased with addition of the tested fertilizers. Such an increase was a function of the rate. The highest Cd contents in shoots was reached by YT and TS applications, whereas the lowest one resulted from rock phosphate treatments. All the phosphorus sources tested increased Cd uptake in the first harvest. For the second harvest, Cd content in the shoot was detected only in plants grown on TS and GP amended soils. Key words: heavy metals, phytoextraction BIODISPONIBILIDADE DE CÁDMIO E CHUMBO EM UM SOLO ADUBADO COM DIFERENTES FONTES DE FÓSFORORESUMO: Fertilizantes fosfatados são essenciais para obtenção de altas produtividades, entretanto, eles podem conter metais pesados que podem contaminar o solo e ameaçar a saúde humana e animal. Este trabalho objetivou a determinação da concentração de Cd e Pb em diferentes fertilizantes fosfatados, bem como a absorção desses metais por plantas de mucuna preta cultivadas em casa-de-vegetação em solo submetido a diferentes doses desses fertilizantes. Os tratamentos foram arranjados em esquema fatorial 4 × 5, dispostos em delineamento experimental inteiramente casualizado, com três repetições, sendo os fatores quatro fontes de P (superfosfato triplo-ST, termofosfato de Yorin-TY, fosfato de Araxá-FA e fosfato de Gafsa-FG) e cinco doses de P 2 O 5 (0, 92, 183, 275 e 366 kg ha -1 ). Os dados foram submetidos à análise de variância e equações de regressão foram ajustadas. A disponibilidade de Pb para mucuna preta nos solos não foi alterada pela aplicação de nenhum dos fertilizantes testados. No entanto, a absorção de Cd pelas plantas foi significativamente aumentada pela aplicação de qualquer um dos fertilizantes, sendo esta absorção proporcional às doses aplicadas. O TY e o ST foram responsáveis pelas maiores concentrações de Cd na parte aérea das plantas, enquanto as menores foram observadas com a aplicação dos fosfatos naturais. Todas as fontes de fósforo disponibilizaram Cd para as plantas no primeiro cultivo. Entretanto, a absorção de Cd só foi detectada no segundo cultivo para os fertilizantes ST e FG. Palavras-chave: metais pesados, fitoextração

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Section: Resultsmentioning

confidence: 66%

Bioavailability of cadmium and lead in a soil amended with phosphorus fertilizers

Mendes

Duda

Nascimento

et al. 2006

Sci. agric. (Piracicaba, Braz.)

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“…The plants absorb directly the toxic metals from the soil or via application of pesticides and fertilizers, which have in their composition, beyond desirable elements, also metals such as Cd, Pb and Cr (Gonçalves Jr. & Pessoa, 2002). These elements may come from indiscriminate disposal of industrial waste as fertilizers containing micronutrients, which are a great concern, since these elements persist in the soil, becoming a source of (1) (2) (3) (4) metal contamination to the environment (Gonçalves Jr. et al, 2000;.…”

Section: Resultsmentioning

confidence: 99%

The use of Crambe abyssinica seeds as adsorbent in the removal of metals from waters

Gonçalves

Rúbio

Meneghel

et al. 2013

Rev. bras. eng. agríc. ambient.

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RESUMOThis study aimed to evaluate the efficacy of crambe seeds (Crambe abyssinica Hochst) as adsorbent material in the removal of the toxic metals cadmium, lead and chromium from contaminated solutions. The byproduct was obtained from oil extraction of crambe seeds in a Soxhlet system. In kinetic tests, the adsorbent masses had varied in solutions containing the metals under pH 5.0 and 7.0. Metal concentrations were determined by flame atomic absorption spectrometry (FAAS). According to optimal conditions found, the adsorption assays were performed for obtaining the isotherms of each metal, which were linearized in agreement with the mathematical models of Langmuir and Freundlich. According to the obtained results, the adsorbent was effective in removing the assessed metals in aqueous solutions, being feasible its employment as an alternative material for the adsorption of metals, besides being a byproduct, which has undergone no prior treatment.Palavras-chave: biosorption, remediation of waters, sustainability Uso de sementes de Crambe abyssinica como adsorvente na remoção de metais de águas ABSTRACT Objetivou-se, neste trabalho, avaliar a eficácia do uso das sementes de crambe (Crambe abyssinica Hochst) como material adsorvente na remoção dos metais pesados tóxicos cádmio, chumbo e cromo de soluções contaminadas. Obteve-se a torta a partir da extração do óleo das sementes de crambe em sistema tipo Soxhlet. Nos testes cinéticos as massas do adsorvente variaram em soluções contendo os metais em condições de pH 5.0 e 7.0. As concentrações dos metais foram determinadas por espectrometria de absorção atômica modalidade chama (EAA/chama). De acordo com as condições ótimas encontradas ensaios de adsorção foram realizados para a construção das isotermas de cada metal as quais, por sua vez, foram linearizadas conforme os modelos matemáticos de Langmuir e Freundlich. Com base nos resultados obtidos concluiuse que o adsorvente foi eficaz na remoção dos metais estudados em soluções aquosas, sendo viável sua utilização como material alternativo para adsorção dos metais pesados, além de se tratar de um coproduto que não sofreu tratamento prévio algum.

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“…The soil itself, with no addition of agrochemicals, is an essential and natural source of nutrients for plants and other living organisms, consequently, trace amounts of metal ions occur naturally in the soil's composition, functioning as important micronutrients. These metal ions are mainly classified into essential micronutrients (Fe, Zn, Mn, Ca, Na, K, Cu, and Mo), beneficial micronutrients (Co, Ni, and V), and non-essential micronutrients (Cd, Cr, Hg, and Pb) [75,76] . However, the enforcement of intensive agriculture has resulted in abusive techniques that are combined with the massive use of agrochemicals solely to increase profit and productivity.…”

Section: Metal Ions Removal From Water and Soilsmentioning

confidence: 99%

Polymers and its applications in agriculture

et al. 2017

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Graphical Abstract RbstractPolymers are a class of soft materials with numerous and versatile mechanical and chemical properties that can be tuned specific to their application. Agriculture is an expanding area due to the requirement for indispensable food to meet the demands of a growing global population. Consequently, development of technology to improve the quality of the soil and agriculture manages is still under development. Intelligent agricultural supplies (controlled or slow release agrochemicals and superabsorbents) and biosorbents contribute to an expanding niche using technology from polymers. This review elucidates the state-of-the-art and will discuss some important aspects of using polymers in intelligent fertilizers, as well as superabsorbent, biosorbent and biodegradation processes in agriculture that are environmentally, technically, socially, and economically sustainable.

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Avaliação da fitodisponibilidade de cádmio, chumbo e crômio, em soja cultivada em latossolo vermelho escuro tratado com fertilizantes comerciais

Cited by 23 publications

References 6 publications

Bioavailability of cadmium and lead in a soil amended with phosphorus fertilizers

Bioavailability of cadmium and lead in a soil amended with phosphorus fertilizers

The use of Crambe abyssinica seeds as adsorbent in the removal of metals from waters

Polymers and its applications in agriculture

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