Migration of Pesticide Residues from Agricultural Soil to Groundwater

Guzzella, Licia; Paolis, Adolfo De; Bartone, C.; Pozzoni, F.; Giuliano, G.

doi:10.1080/03067319608045560

Cited by 27 publications

(9 citation statements)

References 6 publications

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“…For the pesticide determination, the soil sample was defrosted and dehydrated under air conditions and ambient temperature (20–22°C) for 96 h. The water content of the air‐dried soil sample was determined by drying 10 g of soil in a stove at 105°C for 24 h. The dry sample was sieved with a 2‐mm sieve. The extraction procedure was performed according to the method developed by Guzzella et al (1996), briefly described here: 10 to 50 g of air‐dried sifted soil sample was extracted with pesticide free–grade methanol in a Soxhlet extraction apparatus for 8 h, and the extract was cleaned by passing it through a diatom power‐filled column.…”

Section: Methodsmentioning

confidence: 99%

“…Terbuthylazine and desethylterbuthylazine determination was performed on a HRGC 5160 Mega Series (Carlo Erba) with an NPD 80‐FL phosphorus–nitrogen detector, TS‐2 ionic source, and Sil13‐Chrompack capillary column (50‐m length × 0.25‐mm i.d., 0.2‐ to 0.25‐μm film thickness; Varian, Palo Alto, CA) (Guzzella et al, 1996). Quantification employed an external standard method.…”

Section: Methodsmentioning

confidence: 99%

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Studies on Mobility and Degradation Pathways of Terbuthylazine Using Lysimeters on a Field Scale

et al. 2003

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Terbuthylazine [N2-tert-butyl-6-chloro-N4-ethyl-1,3,5-triazine-2,4-diamine] degradation pathways in agricultural soils were evaluated by following the appearance and mobility of its main transformation products: dealkylated and hydroxylated derivatives. Three experimental degradation studies in open field were performed in different hydraulic conditions: constant hydraulic head on topsoil, achieved to simulate the highest-risk situation for the aquifer, intermittent artificial precipitation to simulate a medium-risk situation; and natural precipitation to reproduce the lowest-risk condition. Concentrations of terbuthylazine transformation products derived from dealkylation and hydroxylation reactions were measured in leachates and soil samples collected during the three experiments. Desethylterbuthylazine (DET) and deethylterbuthylazine-2-hydroxide [DETH; 4-amino-6-terbutylamino-(1,3,5)-triazine-2-OH] were found to be the highest-leaching compounds and therefore can be considered as potential pollutants for aquifer contamination.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Studies on Mobility and Degradation Pathways of Terbuthylazine Using Lysimeters on a Field Scale

et al. 2003

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“…Pesticides are used in agriculture to enhance the production and quality of food crops. Problems related to this practice are the difficulties in applying specifically to only one target and in limiting pesticide distribution in the environment 1, 2. The use of fungicides has been shown to result in the pollution of water bodies through processes such as leaching and runoff 3…”

Section: Introductionmentioning

confidence: 99%

Organic amendments affecting sorption, leaching and dissipation of fungicides in soils

Fernandes

Cox

Hermosı́n

et al. 2006

Pest Management Science

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Metalaxyl and tricyclazole are two fungicides widely used in Spain in vineyard and rice crops respectively. In this study an investigation has been made of the effect of three organic amendments [two commercial amendments, solid fertiormont (SF) and liquid fertiormont (LF), and a residue from the olive oil production industry, alperujo (OW)] on fungicide fate in soils. Changes in soil porosity on amendment were studied by mercury intrusion porosimetry, sorption-desorption studies were performed by the batch equilibration method, dissipation of metalaxyl and tricyclazole in the soil was studied at - 33 kPa moisture content and 20 degrees C and leaching was studied in hand-packed soil columns. Amendments with SF and LF reduced soil porosity, while OW increased porosity through an increase in pore volume in the highest range studied. Tricyclazole sorbed to soils to a much higher extent than metalaxyl. With some exceptions, sorption of both fungicides increased on amendment, especially in the case of SF-amended soils, which rendered the highest K(oc) values. In soils amended with the liquid amendment LF, sorption either remained unaffected or decreased, and this decrease was much higher in the case of metalaxyl and a soil with 70% clay. In this clay soil, amendment with OW, of very high soluble organic matter content, also decreased metalaxyl sorption. Tricyclazole is more persistent in soil than metalaxyl, and both fungicides were found to be more persistent in amended soils than in unamended soils. Leaching of metalaxyl and tricyclazole in soil columns was inversely related to sorption capacity. The low recoveries of tricyclazole in leachates and in soil columns when compared with metalaxyl, a less persistent fungicide, were attributed to diffusion into micropores and to increase in sorption with residence time in the soil, both processes favoured by the low mobility of tricyclazole.

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“…[14] Numerous applications based on gas chromatography coupled with mass spectrometry (GC-MS) have been reported for the determination of pesticides in water samples. [15,16] Recognizing the negative effects of water contamination by pesticides [17,18,19,20] and the lack of effective analytical projects in Lebanon, this work reports for the first time, the detection and quantification of pesticides in surface water and groundwater (GW) samples collected from South Litani region in particular during the four seasons of year 2012. An optimized and validated SPE followed by GC-MS [21] was applied for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Occurrence and levels of pesticides in South Lebanon water

Youssef

Younes

Kouzayha

et al. 2015

Chemical Speciation & Bioavailability

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This study reviews the detection of pesticides in different surface and groundwater samples collected from South Litani region in South Lebanon during 2012. These have been analyzed using an optimized and validated solid phase extraction method followed by gas chromatography coupled with mass spectrometry. Organochlorine and organophosphate pesticides were mostly noted at levels below the recommended value for individual pesticide in water except pirimiphosmethyl that was recorded at 300.87 ng L −1 in groundwater sample, designated for drinking water and collected in February. DDE concentration exceeded 100 ng L −1 in both surface and groundwater in October. The reported results represent the first Lebanese statistical data illustrating the quantification of pesticides in water over a period of time. More importantly, it draws attention to the need of pesticides' monitoring programs in the Lebanese water resources.

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Migration of Pesticide Residues from Agricultural Soil to Groundwater

Cited by 27 publications

References 6 publications

Studies on Mobility and Degradation Pathways of Terbuthylazine Using Lysimeters on a Field Scale

Studies on Mobility and Degradation Pathways of Terbuthylazine Using Lysimeters on a Field Scale

Organic amendments affecting sorption, leaching and dissipation of fungicides in soils

Occurrence and levels of pesticides in South Lebanon water

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