Determination of solid–liquid partition coefficients (Kd) for the herbicides isoproturon and trifluralin in five UK agricultural soils

Cooke, Cindy M.; Shaw, G.; Collins, Chris

doi:10.1016/j.envpol.2004.04.027

Cited by 50 publications

(23 citation statements)

References 25 publications

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“…The higher the organic matter content, the higher the sorption. Cooke et al (2004) found the partitioning coefficient (K d ) for five soils to be from 106 to 204. For soils with high organic content, sorption was almost irreversible.…”

Section: Resultsmentioning

confidence: 99%

“…At higher dosages, trifluralin also inhibits root development and is often used as a pre-emergence control of many annual grasses and broad leaved weeds in cotton. Trifluralin has a log K ow 4.91 and 4 × 10 −5 mPa (20 • C; Cooke et al 2004). Since Trifluralin is hydrophobic, it is strongly sorbed by soil organic matter (Tiryaki et al 2004;Oldal et al 2006).…”

Section: Introductionmentioning

confidence: 99%

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Persistence and behavior of pesticides in cotton production in Turkish soils

Turgut

Erdoğan

Ateş

et al. 2009

Environ Monit Assess

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Turkey is the sixth largest producer of cotton in the world. Two of the most commonly applied pesticides used in cotton production are trifluralin and endosulfan. Although both are very effective at controlling pests, their persistence in the environment poses risks to human health and the environment. Four loam soils and one silty-loam soil were studied to evaluate the persistence of trifluralin and endosulfan in relation to soil characteristics. Degradation with trifluralin reached as high as 70% of the applied doses. Soils with the highest organic matter content had the lowest degradation rate, indicating a tighter sorption of trifluralin. Endosulfan degradation was a function of soil type and the specific isomer, with beta-endosulfan depicting the highest degradation.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Persistence and behavior of pesticides in cotton production in Turkish soils

Turgut

Erdoğan

Ateş

et al. 2009

Environ Monit Assess

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show abstract

“…Both route and rate of degradation also depend on properties of the chemicals. For ionized molecules, mineralogical composition and soil pH are key parameters, whereas sorption of neutral compounds is mostly governed by the soil organic matter (Cooke et al, 2003). These generally accepted rules have been obtained in studies considering large number of soil types and origins.…”

Section: Pesticides Sorption In Soilsmentioning

confidence: 99%

“…The combination of effects of soil organic matter and of mineral constituents, such as smectite-type clays and amorphous clays-allophanes, usually increases the sorption of neutral molecules. They have a higher cation exchange capacity than other soil colloids, such as clays, and thus play an important role in adsorption reactions and determining fate of pesticides in the environment (Cooke et al, 2003).…”

Section: Pesticides Sorption In Soilsmentioning

confidence: 99%

Pesticides in the Environment: Impacts and its Biodegradation as a Strategy for Residues Treatment

Ortiz-Hernández¹,

Sánchez-Salinas²,

Olvera-Velona³

et al. 2011

Pesticides - Formulations, Effects, Fate

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“…1). Due to their relatively high water solubilities (isoproturon, 55 mg liter Ϫ1 at 22°C; chlorotoluron, 74 mg liter Ϫ1 at 25°C; linuron, 64 mg liter Ϫ1 at 20°C) (1) and low tendencies to sorb to soil (solid-liquid partition coefficients: isoproturon, 1.96; fenuron, 0.76; and monuron, 2.04) (2,3), some phenylurea herbicides and their metabolites have been detected as contaminants of groundwater (4,5), streams (4,6), lakes (7,8), and seawater (9) in different areas worldwide. Ecotoxicological data show that phenylurea herbicides and their main metabolites are environmental hazards and are carcinogenic to animals and humans; thus, the fate of phenylurea herbicides in the environment has received considerable attention (10,11).…”

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confidence: 99%

The Novel BacterialN-Demethylase PdmAB Is Responsible for the Initial Step ofN,N-Dimethyl-Substituted Phenylurea Herbicide Degradation

Zhou

Sørensen

et al. 2013

Appl Environ Microbiol

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The environmental fate of phenylurea herbicides has received considerable attention in recent decades. The microbial metabolism of N,N-dimethyl-substituted phenylurea herbicides can generally be initiated by mono-N-demethylation. In this study, the molecular basis for this process was revealed. The pdmAB genes in Sphingobium sp. strain YBL2 were shown to be responsible for the initial mono-N-demethylation of commonly used N,N-dimethyl-substituted phenylurea herbicides. PdmAB is the oxygenase component of a bacterial Rieske non-heme iron oxygenase (RO) system. The genes pdmAB, encoding the ␣ subunit PdmA and the ␤ subunit PdmB, are organized in a transposable element flanked by two direct repeats of an insertion element resembling ISRh1. Furthermore, this transposable element is highly conserved among phenylurea herbicide-degrading sphingomonads originating from different areas of the world. However, there was no evidence of a gene for an electron carrier (a ferredoxin or a reductase) located in the immediate vicinity of pdmAB. Without its cognate electron transport components, expression of PdmAB in Escherichia coli, Pseudomonas putida, and other sphingomonads resulted in a functional enzyme. Moreover, coexpression of a putative [3Fe-4S]-type ferredoxin from Sphingomonas sp. strain RW1 greatly enhanced the catalytic activity of PdmAB in E. coli. These data suggested that PdmAB has a low specificity for electron transport components and that its optimal ferredoxin may be the [3Fe-4S] type. PdmA exhibited low homology to the ␣ subunits of previously characterized ROs (less than 37% identity) and did not cluster with the RO group involved in O-or N-demethylation reactions, indicating that PdmAB is a distinct bacterial RO N-demethylase.

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Determination of solid–liquid partition coefficients (Kd) for the herbicides isoproturon and trifluralin in five UK agricultural soils

Cited by 50 publications

References 25 publications

Persistence and behavior of pesticides in cotton production in Turkish soils

Persistence and behavior of pesticides in cotton production in Turkish soils

Pesticides in the Environment: Impacts and its Biodegradation as a Strategy for Residues Treatment

The Novel BacterialN-Demethylase PdmAB Is Responsible for the Initial Step ofN,N-Dimethyl-Substituted Phenylurea Herbicide Degradation

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