Relação da velocidade de escoamento da solução e do comprimento da coluna de solo com os parâmetros de transporte de potássio em um latossolo e um neossolo

Ribeiro, Danilo Pereira; Martinez, Mauro Aparecido; Matos, Antônio Teixeira de; Ruíz, Hugo Alberto; Parreiras, Marina Souza Nicácio; Cecon, Paulo Roberto

doi:10.1590/s0100-06832011000600007

Cited by 7 publications

(3 citation statements)

References 38 publications

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“…It appears that the measured data differed little from the simulated data, in which both the Vogeler et al (1996) adapted to the linear type CEw-Ci relationship and Hydrus-2D showed positive correlation (r +) with the measured data, which demonstrates the adequacy of these models for modeling the levels of nitrate and potassium in the soil solution. These results are in agreement with those obtained by Oliveira et al (2010), Ribeiro et al (2011) and Pinho and Miranda (2014) who stated that the Hydrus model was efficient in simulating the displacement of potassium and water.…”

Section: Resultssupporting

confidence: 92%

Simulation of nitrate and potassium concentrations in soil solution using parametric models and Hydrus-2D

Conceição¹,

Coelho²,

Silva³

et al. 2021

Rev. ambiente água

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This study estimated the nitrate and potassium concentration in the soil solution of drainage lysimeter using the mathematical models developed by Vogeler et al. (1996) and Muñoz-Carpena et al. (2005) and the computational model Hydrus-2D, while comparing the simulated and observed data using statistical parameters. The cultivar used for the study was ‘Prata Gorutuba’. The experimental plots were six lysimeters of drainage. Fertigation was performed weekly. The mathematical models developed by Vogeler et al. (1996) and Muñoz-Carpena et al. (2005) were used to determine the specific concentration of a given ion (Ci). The Hydrus software was used to simulate the dynamics of nutrients. The concentrations of nitrate and potassium in the soil solution were estimated by the model of Vogeler et al. (1996), adapted to the linear type CEw-Ci ratio and simulated by the Hydrus model, resulting in an acceptable characterization of the distribution of these nutrients.

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Section: Resultssupporting

confidence: 92%

Simulation of nitrate and potassium concentrations in soil solution using parametric models and Hydrus-2D

Conceição¹,

Coelho²,

Silva³

et al. 2021

Rev. ambiente água

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“…A concentration of 266.56 mg L -1 was observed to the depth of 0.56 m (eighth ring) in S1 column, while for S2, at a depth of 0.28 m (fourth ring), a concentration of 99.15 mg L -1 was observed (Figures 3 and 4). Similar results in which the soil textural class influenced the ions displacement were observed by Oliveira et al (2010), Ribeiro et al (2011) and Pinho & Miranda (2014).…”

Section: Resultssupporting

confidence: 88%

Sensitivity Analysis of the Hydrus-1d Model in the Simulation of Potassium Transport in Two Brazilian Soils

Sobenko¹,

Figueira²,

Miranda³

et al. 2017

Anais Do IV Inovagri International Meeting - 2017

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ABSTRACT:In this work we verified the performance of HYDRUS-1D model in the simulation of potassium displacement in segmented columns filled with Haplustox (S1) and Hapludox (S2) soils under unsaturated conditions. For this, the ion transport parameters were obtained by Breakthrough Curves (BTC) applying 1800 mg L -1 potassium solution in segmented columns for posterior simulation concentration profile by the model. The sensitivity analysis of the model was done using the Nash-Sutcliffe Efficiency Index (NSI) by doing positive and negative variations of the model input transport parameters. At the end, by the result of the BTC's, was observed that the soil S2 presented greater interaction with the potassium ion. The sensitivity analysis showed that the parameters saturated hydraulic conductivity, saturated water content and retardation factor presented the farthest NSI values from the unit, that is, they promote greater variations for the two studied soils, especially for S2. KEYWORDS

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“…Increasing numbers of different types of organic micropollutants have been identified and investigated in aqueous environments over recent decades, for example, pharmaceutical compounds (Kümmerer, 2009;Li, 2014;Richardson and Bowron, 1985), pesticides (Ritter, 1990;Song et al, 2010;Yadav et al, 2015), and hormones (Kolpin et al, 2002;Silva et al, 2012;Young and Borch, 2012). A group of organic micropollutants that have recently come into focus comprises the perfluoroalkyl and polyfluoroalkyl substances (PFASs), which seem to be developing into a problem contaminant around the world (Kotthoff et al, 2015;Simon, 2014).…”

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confidence: 99%

Use of column experiments to investigate the fate of organic micropollutants – a review

Banzhaf

Hebig

2016

Hydrol. Earth Syst. Sci.

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Abstract. Although column experiments are frequently used to investigate the transport of organic micropollutants, little guidance is available on what they can be used for, how they should be set up, and how the experiments should be carried out. This review covers the use of column experiments to investigate the fate of organic micropollutants. Alternative setups are discussed together with their respective advantages and limitations. An overview is presented of published column experiments investigating the transport of organic micropollutants, and suggestions are offered on how to improve the comparability of future results from different experiments. The main purpose of column experiments is to investigate the transport and attenuation of a specific compound within a specific sediment or substrate. The transport of (organic) solutes in groundwater is influenced by the chemical and physical properties of the compounds, the solvent (i.e., the groundwater, including all solutes), and the substrate (the aquifer material). By adjusting these boundary conditions a multitude of different processes and related research questions can be investigated using a variety of experimental setups. Apart from the ability to effectively control the individual boundary conditions, the main advantage of column experiments compared to other experimental setups (such as those used in field experiments, or in batch microcosm experiments) is that conservative and reactive solute breakthrough curves can be derived, which represent the sum of the transport processes. There are well-established methods for analyzing these curves. The effects observed in column studies are often a result of dynamic, non-equilibrium processes. Time (or flow velocity) is an important factor, in contrast to batch experiments where all processes are observed until equilibrium is reached in the substrate-solution system. Slight variations in the boundary conditions of different experiments can have a marked influence on the transport and degradation of organic micropollutants. This is of critical importance when comparing general results from different column experiments investigating the transport behavior of a specific organic compound. Such variations unfortunately mean that the results from most column experiments are not transferable to other hydrogeochemical environments but are only valid for the specific experimental setup used. Column experiments are fast, flexible, and easy to manage; their boundary conditions can be controlled and they are cheap compared to extensive field experiments. They can provide good estimates of all relevant transport parameters. However, the obtained results will almost always be limited to the scale of the experiment and are not directly transferrable to field scales as too many parameters are exclusive to the column setup. The challenge for the future is to develop standardized column experiments on organic micropollutants in order to overcome these issues.

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Relação da velocidade de escoamento da solução e do comprimento da coluna de solo com os parâmetros de transporte de potássio em um latossolo e um neossolo

Abstract: (0.10, 0.20, 0.30, 0.40, and 0.50 m) and four pore-water velocities (0.62, 0.69, 0.75, and 0.81 m h -1 for the Oxisol and 0.37, 0.40, 0.44, and 0.48

Cited by 7 publications

References 38 publications

Simulation of nitrate and potassium concentrations in soil solution using parametric models and Hydrus-2D

Simulation of nitrate and potassium concentrations in soil solution using parametric models and Hydrus-2D

Sensitivity Analysis of the Hydrus-1d Model in the Simulation of Potassium Transport in Two Brazilian Soils

Use of column experiments to investigate the fate of organic micropollutants – a review

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