Perdas de nutrientes via subsuperfície em colunas de solo sob fertilização mineral e orgânica

Piovesan, Ricardo Prado; Favaretto, Nerilde; Pauletti, Volnei; Motta, Antônio Carlos Vargas; Reissmann, Carlos Bruno

doi:10.1590/s0100-06832009000400002

Cited by 22 publications

(26 citation statements)

References 19 publications

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“…According to MUCHOVEJ & RECHCIGL (1994), coarse-textured soil and low content of organic matter tend to allow great amount of nitrate loss by leaching. However, nitrate losses are related to negative charges repelling them out of soil colloids (PIOVESAN et al 2009); thus, as presented in Table 1, S2 has 2.03% more clay than S1, what result in less NO 3 -adsorption to S2. Nitrate transport parametric data for calcium nitrate can be observed in Table 4, and P and R parameters are within 95% confidence interval.…”

Section: Resultsmentioning

confidence: 99%

Effect of companion ion on nitrate displacement through transport parameters analysis

et al. 2015

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ABSTRACT:Nitrate is the main form of nitrogen associated with water contamination; the high mobility of this species in soil justifies the concern regarding nitrogen management in agricultural soils. Therefore, the objective of this research was to assess the effect of companion cation on nitrate displacement, by analyzing nitrate transport parameters through Breakthrough Curves (BTCs) and their settings made by numerical model (STANMOD). The experiment was carried out in the Soil and Water Quality Laboratory of the Department of Biosystems Engineering, "Luiz de Queiroz" College of Agriculture in Piracicaba (SP), Brazil. It was performed using saturated soil columns in steady-state flow condition, in which two different sources of inorganic nitrate Ca(NO 3 ) 2 and NH 4 NO 3 were applied at a concentration of 50 mg L -1 NO 3 -. Each column was filled with either a Red-Yellow Oxisol (S1) or an Alfisol (S2). Results are indicative that the companion ion had no effect on nitrate displacement. However, nitrate transport was influenced by soil texture, particle aggregation, solution speed in soil and organic matter presence. Nitrate mobility was higher in the Alfisol (S2). KEYWORDS: breakthrough curves, solute dynamics, leaching EFEITO DO ÍON ACOMPANHANTE NO DESLOCAMENTO DO ÍON NITRATO MEDIANTE ANÁLISE DOS PARÂMETROS DE TRANSPORTE1 RESUMO: O nitrato é a principal forma de nitrogênio associada à contaminação ambiental, e sua elevada mobilidade no solo justifica a preocupação em relação ao manejo da adubação nitrogenada em solos agrícolas tropicais. Portanto, objetivou-se com este trabalho verificar o efeito do íon acompanhante no deslocamento do íon nitrato, mediante a análise dos parâmetros de transporte do nitrato, por meio da elaboração de Breakthrough Curves (BTC) e seus respectivos ajustes pelo modelo de ajuste numérico STANMOD. O experimento foi conduzido no

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Section: Resultsmentioning

confidence: 99%

Effect of companion ion on nitrate displacement through transport parameters analysis

et al. 2015

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“…Além disto, pode-se avaliar a distribuição espacial de fontes de poluição difusa (Libos et al, 2003), os impactos dos diferentes usos do solo (Caovilla et al, 2005;Pinheiro et al, 2009) ou, ainda, estimar o aporte de nutrientes (Bertol et al, 2005;Diel et al, 2007;Piovesan et al, 2009).…”

Section: Introductionunclassified

Concentrações e cargas de nitrato e fosfato na Bacia do Ribeirão Concórdia, Lontras, SC

Pinheiro

Kaufmann

Schneiders

et al. 2013

Rev. bras. eng. agríc. ambient.

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RESUMONeste trabalho foram determinadas as concentrações e as cargas de nitrato e de fosfato inorgânico total, na água de escoamento superficial, de drenagem e subterrânea, na bacia do Ribeirão Concórdia, Lontras, SC. Foram coletadas 102 amostras durante 109 dias, em três seções fluviométricas, três lisímetros e três poços piezométricos, distribuídos no interior da bacia. Concentrations and loads of nitrate and phosphate in the Ribeirão Concórdia river basin, Lontras, SC ABSTRACT This study presents concentrations and loads of nitrate and total inorganic phosphate in surface runoff infiltrating water and subsurface flow in the basin of Ribeirao Concordia, Lontras, SC -Brazil . Over a 109-day period, 102 samples were collected from three river sections, three lysimeters and three piezometric wells in the interior of the basin. Concentrations were compared with the standards given in the CONAMA Resolutions 357/2005 and 420/2009. Concentrations of nitrate and phosphate in lysimeter drainage water and flows were greater than those in river sections and piezometric wells. In the river sections and in surface flow from the lysimeter under pasture, nitrate concentrations were lower than the benchmarks set for such waters. Phosphate concentrations in the river sections and in both lysimeter surface runoff and in drainage water, and in the piezometers, all exceeded the standards defined in CONAMA Resolutions 357/2005 and 420/2009. Drainage waters in the lysimeters transported nitrate and phosphate loads greater than those in surface runoff, which in turn transported loads of the same order of magnitude as in river flow.

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“…Entretanto, as características físicas, químicas e bioló-gicas desse material representam preocupações para seu manejo adequado (O'kelly, 2008). Os benefícios obtidos com o uso do lodo devem ser confrontados com os perigos e os possíveis riscos inerentes à sua utilização (Pengcheng et al, 2008), tais como lixiviação excessiva de nitrato, contaminação de solos, culturas e animais por patógenos e metais, entre outros (Oliveira et al, 2001;Piovesan et al, 2009).…”

Section: Introductionunclassified

“…A mineralização de materiais orgânicos em solos é o principal processo que influencia o suprimento de N para as plantas e também para a lixiviação (O'dowd et al, 1999;Piovesan et al, 2009).…”

Section: Introductionunclassified

Lixiviação de nitrato de um substrato minerado tratado com lodo de esgoto doméstico

2011

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ResumoLodos de esgoto são fontes significativas de N, P, matéria orgânica e outros elementos necessários à nutrição de plantas. A aplicação desses resíduos em solos e substratos é um das mais eficientes maneiras de recuperação de nutrientes. Todavia, os benefícios obtidos com o uso de lodo de esgoto devem ser confrontados com riscos inerentes à sua utilização, tais como a lixiviação excessiva de nitrato, que pode contaminar aquíferos. Normas sanitárias e ambientais impedem o consumo humano de águas com concentrações de nitrato ≥ 10 mg L -1. Dessa forma, este trabalho objetivou mensurar o risco de contaminação de águas subterrâneas por nitrato produzido em substrato exposto pela mineração, que foi tratado com a dose equivalente a 120 t ha -1 de lodo de esgoto, base úmida. O substrato liberou lixiviados com concentrações de até 78 mg L -1 de nitrato, que representam risco de contaminação de águas subterrâneas. Sob as condições testadas neste trabalho, o aquífero subterrâneo deve situar-se a pelo menos 4,5 m de profundidade, para que o lixiviado liberado da camada tratada com lodo de esgoto seja diluído ao longo do perfil de solo a concentrações ≤ 10 mg L -1 , caso a área permaneça sem cobertura vegetal. O estabelecimento de uma cobertura herbácea sobre o substrato reduziu em 40% a quantidade de nitrato liberada no lixiviado, permitindo que o aquífero esteja a 2,7 m de profundidade sem que haja aporte excessivo de nitrato proveniente da camada superficial tratada.Palavras-chave: biossólido, nitrato, mineralização, nitrificação, aquífero.Nitrate leaching from a mined spoil treated with domestic sewage sludge Abstract Sewage sludges are significant sources of N, P, organic matter, and other elements for plant nutrition. Soil and spoil application of such residues is one of the most efficient ways of nutrient recovery. However, the benefits from sewage sludge soil application have to be weighed against sanitary and environmental risks such as excessive nitrate leaching, which may contaminate water. Sanitary and environmental regulations have banned human consumption of waters with nitrate concentrations ≥ 10 mg L -1 . Therefore, this work aimed to measure the risk of groundwater contamination by nitrate produced in a mined spoil treated with 120 t ha -1 of domestic sewage sludge on wet basis. The amended spoil leached solutions with concentrations up to 78 mg L -1 of nitrate, which poses risks to underground water. Under the experimental conditions set in this work, the groundwater table has to rest at 4.5 m depth or deeper to allow the leachate diluting through the soil profile to concentrations ≤ 10 mg L -1 , if the soil remains bare. A grass cover on the amended spoil decreased by 40% the amount of nitrate in the leachate and it would allow a groundwater table at 2.5 m depth without an excessive nitrate input from the top sewage sludge amended layer.

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Perdas de nutrientes via subsuperfície em colunas de solo sob fertilização mineral e orgânica

Cited by 22 publications

References 19 publications

Effect of companion ion on nitrate displacement through transport parameters analysis

Effect of companion ion on nitrate displacement through transport parameters analysis

Concentrações e cargas de nitrato e fosfato na Bacia do Ribeirão Concórdia, Lontras, SC

Lixiviação de nitrato de um substrato minerado tratado com lodo de esgoto doméstico

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