Physicochemical interactions between atrazine and clay minerals

Herwig, Ulrich; Klumpp, Erwin; Narres, Hans‐Dieter; Schwuger, M. J.

doi:10.1016/s0169-1317(01)00024-2

Cited by 77 publications

(53 citation statements)

References 31 publications

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“…The distribution of (Table 2) as binding agents it could be assumed that atrazine residues are directly associated with clay minerals or indirectly via C-, Al-, Fe-and Si-binding mechanisms on clay particles (33 ). As sorption of aged atrazine residues is very likely due to C-binding mechanisms, Al-and Fe-oxides may play a relatively minor role, according to Clausen et al (34 ) and Kovaios et al (35 ) in model studies; whereas, Si-binding using silica gel is reversible (35 ).…”

Section: Analysis and Metabolite Detection Of The Dom-fraction And Dementioning

confidence: 99%

Bioaccessibility of Environmentally Aged ¹⁴C-Atrazine Residues in an Agriculturally Used Soil and Its Particle-Size Aggregates

Jablonowski

Modler

Schäffer

et al. 2008

Environ. Sci. Technol.

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After 22 years of aging under natural conditions in an outdoor lysimeter the bioaccessibility of 14 C-labeled atrazine soil residues to bacteria was tested. Entire soil samples as well as sand-sized, silt-sized and clay-sized aggregates (>20, 20-2, and <2 µm aggregate size, respectively) were investigated under slurried conditions. The mineralization of residual radioactivity in the outdoor lysimeter soil reached up to 4.5 % of the total 14 C-activity after 16 days, inoculated with Pseudomonas sp. strain ADP.The control samples without inoculated bacteria showed a mineralization maximum of only about 1 % after 44 days of incubation. Mineralization increased in the clay-sized aggregates up to 6.2 % of the total residual 14 C-activity within 23 days. With decreasing soil aggregate sizes, residual 1 14 C-activity increased per unit of weight, but only minor differences of the mineralization in the soil and soil size aggregates using mineral-media for incubation was observed. Using additional Na-citrate in the incubation, the extent of mineralization increased to 6.7 % in soil after 23 days following incubation with Pseudomonas sp. strain ADP. These results show that long-term aged 14 C-atrazine residues are still partly accessible to the atrazine degrading microorganism Pseudomonas sp. strain ADP.

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Section: Analysis and Metabolite Detection Of The Dom-fraction And Dementioning

confidence: 99%

Bioaccessibility of Environmentally Aged ¹⁴C-Atrazine Residues in an Agriculturally Used Soil and Its Particle-Size Aggregates

Jablonowski

Modler

Schäffer

et al. 2008

Environ. Sci. Technol.

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“…O processo de sorção de herbicidas no solo influencia sua absorção pelas raízes das plantas e também os processos de dissipação, como degradação biológica, volatilização, lixiviação e transporte por erosão hídrica (Herwig et al, 2001).…”

Section: Introductionunclassified

Sorção e dessorção do diuron em quatro latossolos brasileiros

Rocha¹,

Faria²,

Borges³

et al. 2013

Planta daninha

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231Sorção e dessorção do diuron em quatro latossolos brasileiros 1 Recebido para publicação em 2.5.2012 e aprovado em 25.10.2012. Palavras-chave: herbicidas não iônicos, isotermas de Freundlich, pH do solo.ABSTRACT -The knowledge of herbicide sorption in soils is one of the conditions needed to make reliable recommendations of these compounds, based on their technical and environmental aspects. Thus, the aim of this work was to evaluate sorption and desorption of diuron in Red-Yellow Latosol (RYL), Humic Red-Yellow Latosol (HRYL), Red Latosol (RL), and Yellow Latosol (YL), with different pH values. The Batch Equilibrium method was used to evaluate sorption and desorption. It consisted of the use of 10.0 mL of solution at concentrations of 0.5, 1, 2, 4, 8, and 15 mg L -1 of diuron, prepared in CaCl 2 0.01 mol L -1 . These solutions were added in 2.00 g of soil sample, remaining under agitation for 12 h. After centrifugation and filtration, the diuron concentration in the supernatant was determined by high performance liquid chromatography. Desorption was evaluated using samples kept in tubes after the sorption tests, at an initial concentration of 8 mg L -1 of the herbicide. The Freundlich isotherm was adjusted appropriately to describe the sorption of diuron for all soils. The sorption of diuron was directly related to organic matter content, whereas soils with higher organic matter content, RYL and HRYL showed higher sorption coefficients. The pH increase in soil increases diuron sorption. This was more evident in RL, which has the lowest organic matter content. The desorption process was the inverse of the diuron sorption process, since soils with lower sorption had the highest percentages of desorption.

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“…Nesse Cada herbicida possui um conjunto de propriedades que interferem no destino que essas moléculas terão no ambiente (McDonald et al, 1999), e a intensidade da sua sorção em solos determinará a disponibilidade das moléculas às plantas e microrganismos, controlará sua movimentação para as camadas mais profundas do solo e também para as águas subterrâ-neas (Herwig et al, 2001). Como consequên-cia, a eficácia de controle das plantas daninhas e o risco de contaminação ambiental por esses compostos também são afetados (Ferri et al, 2005).…”

Section: Introductionunclassified

Sorção e dessorção do ametryn em Latossolos brasileiros

Silva¹,

Silva²,

D'Antonino³

et al. 2012

Planta daninha

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RESUMO -O conhecimento dos processos de retenção de herbicidas em solo é fundamental para se prever o potencial de lixiviação e degradação e a eficiência no controle das plantas daninhas. Objetivou-se com este trabalho avaliar os processos de sorção e dessorção do ametryn em quatro solos brasileiros: Latossolo Vermelho-Amarelo (LVA), Latossolo VermelhoAmarelo húmico (LVAh), Latossolo Vermelho (LV) e Latossolo Amarelo (LA), com diferentes valores de pH. Para isso, utilizou-se o método Batch Equilibrium em condições controladas de laboratório e análise por cromatografia líquida de alta eficiência, com detector UV-Vis a 245 nm. Considerando os valores da constante de Freundlich modificada (K' f ), verificou-se, entre os solos estudados, a ordem crescente de sorção do ametryn: LV pH 6,06 < LV pH 5,00 < LA pH 6,30 < LVA pH 6,11 < LVA pH 5,40 < LVAh pH 6,24 < LVAh pH 4,8. Conclui-se que as características teor de matéria orgânica e pH dos solos estudados afetaram a sorção e a dessorção do ametryn. Verificou-se também que solos com maiores teores de matéria orgânica foram os que apresentaram as maiores taxas de sorção, além das menores porcentagens de dessorção, indicando a ocorrência de histerese.Palavras-chave: herbicida, solo, batch equilibrium, cromatografia líquida, isotermas de Freundlich.ABSTRACT -Knowledge of herbicide retention processes in soil is fundamental to predict leaching potential, degradation, and weed control efficiency. The objective of this study was to evaluate the processes of sorption and desorption of ametryn in four Brazilian soils: Red-Yellow Latosol (LVA), Red-Yellow humic Latosol (LVAh), Red Latosol (LV), and Yellow Latosol (LA), with different pH values. Thus, the method "Batch Equilibrium" was applied under controlled laboratory conditions, and analysis by high performance liquid chromatography using UV-Vis detector at 245 nm. Considering the values of the modified Freundlich constant (K'f), the following increasing sorption order of ametryn was verified: LV pH 6.06 <5.00 LV pH <6.30 LA pH <6.11 pH LVA

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Physicochemical interactions between atrazine and clay minerals

Cited by 77 publications

References 31 publications

Bioaccessibility of Environmentally Aged ¹⁴C-Atrazine Residues in an Agriculturally Used Soil and Its Particle-Size Aggregates

Bioaccessibility of Environmentally Aged ¹⁴C-Atrazine Residues in an Agriculturally Used Soil and Its Particle-Size Aggregates

Sorção e dessorção do diuron em quatro latossolos brasileiros

Sorção e dessorção do ametryn em Latossolos brasileiros

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Physicochemical interactions between atrazine and clay minerals

Cited by 77 publications

References 31 publications

Bioaccessibility of Environmentally Aged 14C-Atrazine Residues in an Agriculturally Used Soil and Its Particle-Size Aggregates

Bioaccessibility of Environmentally Aged 14C-Atrazine Residues in an Agriculturally Used Soil and Its Particle-Size Aggregates

Sorção e dessorção do diuron em quatro latossolos brasileiros

Sorção e dessorção do ametryn em Latossolos brasileiros

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Product

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Bioaccessibility of Environmentally Aged ¹⁴C-Atrazine Residues in an Agriculturally Used Soil and Its Particle-Size Aggregates

Bioaccessibility of Environmentally Aged ¹⁴C-Atrazine Residues in an Agriculturally Used Soil and Its Particle-Size Aggregates