Soil Organic Matter as a Factor Influencing the Fate of Organic Chemicals in the Soil Environment

Kozák, Josef

doi:10.1016/b978-044481516-3/50017-7

Cited by 12 publications

(8 citation statements)

References 73 publications

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“…This effect will occur when both fungicides and wastes are applied to soils subjected simultaneously to vine cultivation and to the green filter depuration system. The main processes governing the behavior of nonionic pesticides in soils, such as adsorption and mobility, essentially depend on the soil OM content ( , ). A correlation between adsorption and soil OM contents has been found for different pesticides ( − ).…”

Section: Introductionmentioning

confidence: 99%

Effect of the Addition of Wine Distillery Wastes To Vineyard Soils on the Adsorption and Mobility of Fungicides

Andrades

Rodríguez‐Cruz

Sánchez‐Martín

et al. 2004

J. Agric. Food Chem.

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In the present work, a study was made of the effect of the addition of liquid and solid wine distillery wastes (WLW and WSW) to vineyard soils on the adsorption and leaching of penconazole and metalaxyl, two fungicides of different hydrophobic character that are widely used in vine cultivation. The study of these processes is of great interest, since currently the green filter system is implemented simultaneously in vine cultivation and as an alternative to classic purification methods of such organic wastes. Three vineyard soils selected from the La Rioja region (NW Spain) were used. Adsorption isotherms of the 14C-labeled fungicides by the soils in aqueous medium and in WLW medium were obtained, together with the percolation curves of the fungicides in packed soil columns under saturated flow conditions. The adsorption and leaching of metalaxyl in a soil amended with WSW were also studied. The Freundlich Kf constants indicated an increase in the adsorption of both fungicides by the soils in WLW medium as compared to aqueous medium. The amounts of penconazole leached in the three soils when they were washed with water and WLW ranged between 3.18 and 39.3% and between 2.00 and 10.4%, respectively, of the total fungicide added to the columns. In the case of metalaxyl, these amounts represented 69.1-100 and 91.6-117%. Variations were also observed in the shape and parameters of the breakthrough curves obtained in both systems and in the presence of WSW. The soluble organic compounds of WLW must be retained by the soil components, creating new adsorbent hydrophobic surfaces, which increase the retention in the soil of the highly hydrophobic compound penconazole. In the case of metalaxyl, which is very water soluble, the soluble organic compounds of WLW seem to contribute to the increase in its leaching, whereas the WSW favors the opposite effect. The results obtained, indicating modifications in the adsorption and leaching of penconazole and metalaxyl in the presence of WLW and WSW, show that further studies should be carried out on the adsorption and mobility of the fungicides in soils from the vineyard zone, which in turn are used as a green filter purification system of wine wastes.

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Section: Introductionmentioning

confidence: 99%

Effect of the Addition of Wine Distillery Wastes To Vineyard Soils on the Adsorption and Mobility of Fungicides

Andrades

Rodríguez‐Cruz

Sánchez‐Martín

et al. 2004

J. Agric. Food Chem.

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“…The other 7 soils were natural soils with a higher OM content (3.30-8.24%). The latter soils were included in the study in view of the importance of this parameter (OM) in the adsorption and mobility of pesticides (16). We also studied the adsorption of the fungicide by modeling individual components of the soil, clay minerals, and humic acid because of the importance of the nature of the soil colloidal fractions in these processes (17,18).…”

Section: Introductionmentioning

confidence: 99%

Significance of Soil Properties in the Adsorption and Mobility of the Fungicide Metalaxyl in Vineyard Soils

Andrades

Sánchez‐Martín

Sánchez‐Camazano

2001

J. Agric. Food Chem.

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Adsorption and mobility of the fungicide metalaxyl were studied in 16 vineyard soils from the La Rioja region (Spain), with organic matter (OM) contents in the 0.31--1.37% range, and in 7 natural soils with OM contents in the 3.30--8.24% range. Adsorption isotherms were obtained using the batch equilibrium technique, and mobility was studied by soil thin-layer chromatography (soil-TLC). In all cases, the adsorption isotherms fit the Freundlich equation. The values of the K(f) constants were low in the vineyard soils (0.01--0.64) and increased in the natural soils (1.05--2.83). The n(f) values were in general lower than unity. K(f) constants were significantly correlated (p < 0.001) with the OM content when all of the soils were considered. According to the determination coefficient, r(2), OM would account for 88% of the variance in adsorption. When the vineyard soils alone were considered, a significant correlation was seen between K(f) and the OM and clay contents; both parameters, varying simultaneously, explain 80% of the variance in adsorption. Study of the mobility of metalaxyl with soil-TLC indicated that in vineyard soils the fungicide has the potential for being highly mobile in 19% of the soils and mobile in 81% of them. In natural soils, the fungicide has the potential for being moderately mobile or mobile in 86 and 14% of the soils, respectively. This type of behavior of metalaxyl indicates that in vineyards soils of the La Rioja region (Spain) with low OM contents, where application of the compound is continuous, a leaching of the fungicide from the soil to groundwaters could potentially occur. These results should be borne in mind when metalaxyl is to be used in the soils of this region.

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“…Esto ha puesto de manifiesto que las enmiendas pueden modificar de un modo significativo este comportamiento (Dolaptsoglou y col., 2007;Majumdar y Singh, 2007; Rodríguez-Cruz y col., 2011b) ya que, como es sabido, los procesos de adsorción, movilidad y degradación de los pesticidas en el suelo dependen en gran medida del contenido de materia orgánica del suelo, especialmente cuando los pesticidas agrícolas utilizados son compuestos orgánicos no-iónicos, hidrofóbicos, con solubilidad baja o muy baja en agua (Cheng, 1990;Huang y col., 1995). La adsorción de estos compuestos está relacionada con el contenido en materia orgánica sólida del suelo, mientras que la movilidad de estos compuestos está relacionada con el contenido en materia orgánica disuelta (Kozak, 1996).…”

Section: Influencia De Los Residuos Orgánicos Aplicados Al Suelo En Eunclassified

Dinámica de fungicidas en suelos de viñedo enmendados con sustratos postcultivo de hongos

Benito¹,

María²

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Soil Organic Matter as a Factor Influencing the Fate of Organic Chemicals in the Soil Environment

Cited by 12 publications

References 73 publications

Effect of the Addition of Wine Distillery Wastes To Vineyard Soils on the Adsorption and Mobility of Fungicides

Effect of the Addition of Wine Distillery Wastes To Vineyard Soils on the Adsorption and Mobility of Fungicides

Significance of Soil Properties in the Adsorption and Mobility of the Fungicide Metalaxyl in Vineyard Soils

Dinámica de fungicidas en suelos de viñedo enmendados con sustratos postcultivo de hongos

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