Behavior and Fate of Imidacloprid in Croatian Olive Orchard Soils Under Laboratory Conditions

Broznić, Dalibor; Marinić, Jelena; Mili, Cedomila

doi:10.5772/16752

Cited by 2 publications

(3 citation statements)

References 45 publications

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“…From each location, soil samples (in five subsamples) were collected from 0-to 30-cm depth of the soil profile, following the standard procedure [44]. The soil samples were airdried, sieved using a 2 mm mesh diameter sieve, quartered, and mixed in order to obtain one representative soil sample for each location.…”

Section: Geographical Locations and Soil Samplesmentioning

confidence: 99%

“…Transport of IMI and DIM in the glass columns (column length L = 8.0 cm; internal diameter of 10 mm) filled with air-dry soil was analysed according to the OECD procedure [50], as follows: all columns with soil were initially saturated with a background leaching solution (0.01 M calcium chloride, pH = 5.5) at a flow rate of 0.39 mL min −1 regulated by a peristaltic pump (Reglo DIG, Ismatec, Switzerland) from the column bottom, in From each location, soil samples (in five subsamples) were collected from 0-to 30-cm depth of the soil profile, following the standard procedure [44]. The soil samples were air-dried, sieved using a 2 mm mesh diameter sieve, quartered, and mixed in order to obtain one representative soil sample for each location.…”

Section: Pesticide Transport Experimentsmentioning

confidence: 99%

“…Along with several other EU countries, in 2020 Croatia granted emergency authorization for outdoor use of IMI, due to its effectiveness in the protection of sugar beet [42]. It is also very effective against olive fruit fly (Bactrocera oleae), the most noxious pest in olive tree plantations [43][44][45][46]. In our previous publication, we analysed the sorption of dimethoate (DIM) and established that the leaching potential was the highest in the soil taken from the olive tree plantation located in the coastal (Mediterranean) part of Croatia [47].…”

Section: Introductionmentioning

confidence: 99%

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Emerging Contaminant Imidacloprid in Mediterranean Soils: The Risk of Accumulation Is Greater than the Risk of Leaching

Didović

Kowalkowski

Broznić

2022

Toxics

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Imidacloprid (IMI) is an extensively used neonicotinoid insecticide whose occurrence in the environment is a worldwide problem. Its sorption/transport properties are recognized as one of the key knowledge gaps hindering policymaking regarding its international routine monitoring in soils. Therefore, we studied IMI transport behaviour in Croatian Mediterranean soils using column experiments. Breakthrough curves were analysed using the two-site adsorption model and compared against dimethoate (DIM). Transport parameters were correlated to soil physicochemical properties. The results indicate that IMI shows a high degree of preference for soil organic matter over any other soil constituent. For IMI, the clay did not exhibit any sorption activity, while hematite did act as an active sorbent. Contrarily, hematite increased the leachability of DIM by blocking the active sorption sites on clay platelets. Both hematite and clay sorption acted as type-2 (i.e., rate-limiting) sites. In all soils, IMI exhibited lower short-term leachability than DIM. Combined with a body of data concerning other aspects of IMI environmental behaviour, the results indicate that the risk of accumulation of IMI in the soil is greater than the risk of contamination by leaching. Thus, continuous monitoring of IMI in soils should be incorporated into future soil health protection programs.

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Section: Geographical Locations and Soil Samplesmentioning

confidence: 99%

Section: Pesticide Transport Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Emerging Contaminant Imidacloprid in Mediterranean Soils: The Risk of Accumulation Is Greater than the Risk of Leaching

Didović

Kowalkowski

Broznić

2022

Toxics

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Sorption–desorption of imidacloprid onto a lacustrine Egyptian soil and its clay and humic acid fractions

Kandil

El-Aswad

Koskinen

2015

Journal of Environmental Science and Health, Part B

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Sorption-desorption of the insecticide imidacloprid 1-[(6-chloro-3-pyridinyl)-methyl]-N-nitro-2-imidazolidinimine onto a lacustrine sandy clay loam Egyptian soil and its clay and humic acid (HA) fractions was investigated in 24-h batch equilibrium experiments. Imidacloprid (IMDA) sorption-desorption isotherms onto the three sorbents were found to belong to a non-linear L-type and were best described by the Freundlich model. The value of the IMDA adsorption distribution coefficient, Kd(ads), varied according to its initial concentration and was ranged 40-84 for HA, 14-58 for clay and 1.85-4.15 for bulk soil. Freundlich sorption coefficient, Kf(ads), values were 63.0, 39.7 and 4.0 for HA, clay and bulk soil, respectively. The normalized soil Koc value for imidacloprid sorption was ∼800 indicating its slight mobility in soils. Nonlinear sorption isotherms were indicated by 1/n(ads) values <1 for all sorbents. Values of the hysteresis index (H) were <1, indicating the irreversibility of imidacloprid sorption process with all tested sorbents. Gibbs free energy (ΔG) values indicated a spontaneous and physicosorption process for IMDA and a more favorable sorption to HA than clay and soil. In conclusion, although the humic acid fraction showed the highest capacity and affinity for imidacloprid sorption, the clay fraction contributed to approximately 95% of soil-sorbed insecticide. Clay and humic acid fractions were found to be the major two factors controlling IMDA sorption in soils. The slight mobility of IMDA in soils and the hysteresis phenomenon associated with the irreversibility of its sorption onto, mainly, clay and organic matter of soils make its leachability unlikely to occur.

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Behavior and Fate of Imidacloprid in Croatian Olive Orchard Soils Under Laboratory Conditions

Cited by 2 publications

References 45 publications

Emerging Contaminant Imidacloprid in Mediterranean Soils: The Risk of Accumulation Is Greater than the Risk of Leaching

Emerging Contaminant Imidacloprid in Mediterranean Soils: The Risk of Accumulation Is Greater than the Risk of Leaching

Sorption–desorption of imidacloprid onto a lacustrine Egyptian soil and its clay and humic acid fractions

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