An exploration of the relationship between adsorption and bioavailability of pesticides in soil to earthworm

Yu, Yun Long; Wu, Xiaomao; Li, Shao Nan; Fang, Hua; Zhan, Hai Yan; Yu, Jing

doi:10.1016/j.envpol.2005.08.058

Cited by 80 publications

(48 citation statements)

References 22 publications

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“…These results showed that sorption-desorption isotherms for acetochlor were hysteretic and indicative of a positive hysteresis with HI < 1.0. This is consistent with other reports describing desorption hysteresis of acetochlor (Taylor et al 2004) and the related chloroacetanilide herbicides like butachlor (Yu et al 2006) and metolachlor (Zheng & Cooper 1996). The percentages of acetochlor desorbed from soils after four successive desorption cycles ranged from 7.80 to 54.5% (Table 2) and were correlated positively with TOC (Table 3).…”

Section: Resultssupporting

confidence: 80%

Retention characteristics of acetochlor in soils collected from different depths in relation to soil properties (Žitný ostrov area, SW Slovakia)

Tatarková¹,

Hiller²,

Halko³

2014

Soil & Water Res.

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Tatarková V., Hiller E., Halko R. (2014): Retention characteristics of acetochlor in soils collected from different depths in relation to soil properties (Žitný ostrov area, SW Slovakia). Soil & Water Res., 9: 58-65.Determination of the sorption-desorption of herbicides within soil profile is one of the first steps in predicting their leaching potential. Batch experiments were performed to evaluate the influence of soil properties on acetochlor retention. Soil samples were taken from horizons A, B, and C of three soil types representative of the Žitný ostrov area. The sorption and desorption isotherms were fitted to the Freundlich equation. The Freundlich sorption coefficient (K fs ) values ranged from 0.71 to 6.58 mg(1-1/n) .l (1/n) /kg and were correlated positively with soil organic carbon, humic and fulvic acid carbons, amorphous aluminum oxides, and negatively with soil pH. The Freundlich desorption coefficient (K fd ) values were greater than those for sorption, showing that not all acetochlor sorbed was desorbed after four washing steps. The percentage of acetochlor desorbed ranged from 7.80 to 54.5% with decreased desorption from soil horizons B and C. The higher sorption capacity of surficial soil horizons in the three soils may be a limiting factor for penetration of acetochlor through soil profiles into groundwater.

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Section: Resultssupporting

confidence: 80%

Retention characteristics of acetochlor in soils collected from different depths in relation to soil properties (Žitný ostrov area, SW Slovakia)

Tatarková¹,

Hiller²,

Halko³

2014

Soil & Water Res.

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“…In addition Chiang et al [17] achieved findings in agreement with previous results by nine Taiwan soils at the range of 11.14 -33.62. Likewise, Yu et al [7] got similar results (range 6.78 -17.36) on butachlor adsorption by five china soils.…”

Section: Adsorption Equilibrium Studysupporting

confidence: 67%

“…Up to now, many studies on the sorption of butachlor by soil revealed that only soil organic matter was closely related to sorption capability [6] [7], and little evidence indicated whether other soil characteristics such as inorganic components and CEC would influence the adsorption of butachlor by soil [8]. As adsorption of butachlor has not been studied on Iranian soils, its knowledge is necessary for predicting mobility of butachlor in soil environments.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Herbicide Butachlor in Cultivated Soils of Golestan Province, Iran

Armanpour¹,

Bing²

2015

GEP

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Butachlor is a non-ionic herbicide that has been applied widely for agriculture, especially in paddy fields. Through batch equilibration experiments, the adsorption characteristics of butachlor were investigated in eight cultivated soil samples collected from Golestan Province, Iran. The data obtained from adsorption equilibrium experiments fitted the linear equation very well. Results showed that butachlor had weak to moderate adsorption capability in different soils. Trend of butachlor adsorption was similar to the order of abundance of organic carbon in the soils. The Gibbs free energy values were found negative and adsorption was spontaneous and exothermic in nature. Statistical analysis showed that organic carbon, CEC (cation exchange capacity), and the Rt ratio (ratio of TNV to organic matter content) were the more effective parameters governing butachlor retention and mobility in soils.

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“…Most of the bioaccumulation reported for the earthworm is expressed as BAF in the soil exposure, and about half of these BAFs were less than unity (Table 3). Since the uptake amount of a pesticide correlates with its hydrophobicity (log K ow ), 81) these low values partly originate from the metabolism of the earthworm. Among the pesticides with BAF>1, the total radioactive residues of C e and C s without consideration of metabolism accounted for the apparently high BAF values of cypermethrin, pentachlorophenol and the triazines.…”

Section: Bioconcentration and Bioaccumulationmentioning

confidence: 99%

Toxicity, bioaccumulation and metabolism of pesticides in the earthworm

Katagi

Ose

2015

Journal of Pesticide Science

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The toxic effects of pesticides on earthworms, one of the most important bioindicators in the terrestrial environment, are closely related to their body burden determined by uptake, metabolism and excretion processes. Not only the passive diffusion via the outer skin from a dissolved fraction of pesticide but also the ingestion of contaminated soil and food governs the uptake process, with each contribution controlled by either the hydrophobicity of the pesticide or the soil organic matter. Although the available information is limited, earthworms are likely to metabolize pesticides via hydrolysis and oxidation (Phase I) followed by conjugation (Phase II), and low bioaccumulation is observed as a result for most pesticides. The acute toxicity in the soil exposure can be partly explained by the dissolved fraction of pesticide in pore water, but the contribution of dietary uptake and metabolism should be further studied to correctly evaluate pesticide toxicity.

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An exploration of the relationship between adsorption and bioavailability of pesticides in soil to earthworm

Cited by 80 publications

References 22 publications

Retention characteristics of acetochlor in soils collected from different depths in relation to soil properties (Žitný ostrov area, SW Slovakia)

Retention characteristics of acetochlor in soils collected from different depths in relation to soil properties (Žitný ostrov area, SW Slovakia)

Adsorption of Herbicide Butachlor in Cultivated Soils of Golestan Province, Iran

Toxicity, bioaccumulation and metabolism of pesticides in the earthworm

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