Sorption of 2,4-D and other phenoxy herbicides to soil, organic matter, and minerals

Werner, David; Garratt, James; Pigott, Geoffrey

doi:10.1007/s11368-012-0589-7

Cited by 54 publications

(42 citation statements)

References 57 publications

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“…The operating conditions were; λ D 01.5406 A , V D 25 KV, I D 20 mA. Boivin et al [11] ; b Werner et al [7] 2,4-D and soil components under oxic and anoxic conditions 493 Samples were equilibrated for 24 h by shaking in an endover-end shaker (70 rpm) in the dark at 25 § 1 C at an initial pH of 7.0 § 0.2 for all experiments (adjusted with 0.05 M HCl and 0.05 M NaOH). After equilibration, suspensions were centrifuged at 5000 g for 20 min.…”

Section: Soil Characterizationmentioning

confidence: 99%

“…[5] Some authors argue that inter-associative processes between soil components may block sorption functional groups; others report that such associations may complement one another, thereby enhancing sorption on the resultant aggregates. [6,7] A careful review of the literature indicates that 2,4-D can partition into soil organic matter (SOM) in both its anionic and nonionic forms. [7,8] Moreover, adsorption to mineral surfaces have been demonstrated only when the phenoxy herbicides occur in anionic form.…”

Section: Introductionmentioning

confidence: 99%

“…[6,7] A careful review of the literature indicates that 2,4-D can partition into soil organic matter (SOM) in both its anionic and nonionic forms. [7,8] Moreover, adsorption to mineral surfaces have been demonstrated only when the phenoxy herbicides occur in anionic form. [9,10] However, some studies observed no influence of OC contents and attributed the difference in sorption of acid herbicides to different interactions of SOM (especially polarity) and pH.…”

Section: Introductionmentioning

confidence: 99%

“…[9,10] However, some studies observed no influence of OC contents and attributed the difference in sorption of acid herbicides to different interactions of SOM (especially polarity) and pH. [2,7,11] In all cases, the linear adsorption coefficient, K d , remains a vital tool in expressing the distribution of pesticides between soil and aqueous phases.…”

Section: Introductionmentioning

confidence: 99%

“…[7] To appropriately evaluate the distribution pattern of 2,4-D in the environment, its interaction with soil components may be necessary because the herbicide can bind to soil via several mechanisms. Therefore, the purpose of the current investigation was to quantify sorption parameters for 2,4-D on soil components under both oxic and anoxic conditions.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Kinetics and isotherm analysis of 2,4-dichlorophenoxyl acetic acid adsorption onto soil components under oxic and anoxic conditions

Ololade

Alomaja

Oladoja

et al. 2015

Journal of Environmental Science and Health, Part B

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2,4-dichlorophenoxyl acetic acid (2,4-D, pKa = 2.8) is used extensively as a herbicide in agricultural practices. Its sorption behavior on both untreated and soils treated to significantly remove specific components (organic and iron and manganese [Fe-Mn] oxides and hydroxides phases) was investigated under oxic and anoxic conditions. The chemical and structural heterogeneity of the soil components were characterized by elemental analysis and X-ray diffraction (XRD). The coexistence of the various components seems to either mask sorption sites on the untreated soil surfaces or inhibit interlayer diffusion of 2,4-D. All sorption data conform to the Freundlich description and a pseudo-second-order kinetic model. There was a strong positive correlation between sorption capacity K(d), and surface area (r(2) ≤ 0.704), but a negative correlation was uncovered with both pH and organic carbon (r(2) ≤ -0.860). The results indicate that 2,4-D is preferably sorbed under oxic rather than anoxic conditions and it is greater on soils containing a high Fe content. There was incomplete 2,4-D sorption reversibility, with desorption occurring more rapidly under anoxic conditions. The study suggests that stimulation of Fe III reduction could be used for the bioremediation of a 2,4-D-contaminated site.

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Section: Soil Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Kinetics and isotherm analysis of 2,4-dichlorophenoxyl acetic acid adsorption onto soil components under oxic and anoxic conditions

Ololade

Alomaja

Oladoja

et al. 2015

Journal of Environmental Science and Health, Part B

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Organic and Contaminant Geochemistry

Tunega

Gerzabek

Haberhauer

et al. 2016

Molecular Modeling of Geochemical Reactions

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Adsorption and degradation of phenoxyalkanoic acid herbicides in soils: A review

Paszko

Muszyński

Materska

et al. 2016

Enviro Toxic and Chemistry

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The primary aim of the present review on phenoxyalkanoic acid herbicides-2-(2,4-dichlorophenoxy) acetic acid (2,4-D), 2-(4-chloro-2-methylphenoxy) acetic acid (MCPA), (2R)-2-(2,4-dichlorophenoxy) propanoic acid (dichlorprop-P), (2R)-2-(4-chloro-2-methylphenoxy) propanoic acid (mecoprop-P), 4-(2,4-dichlorophenoxy) butanoic acid (2,4-DB), and 4-(4-chloro-2-methylphenoxy) butanoic acid (MCPB)-was to compare the extent of their adsorption in soils and degradation rates to assess their potential for groundwater contamination. The authors found that adsorption decreased in the sequence of 2,4-DB > 2,4-D > MCPA > dichlorprop-P > mecoprop-P. Herbicides are predominantly adsorbed as anions-on organic matter and through a water-bridging mechanism with adsorbed Fe cations-and their neutral forms are adsorbed mainly on organic matter. Adsorption of anions of 2,4-D, MCPA, dichlorprop-P, and mecoprop-P is inversely correlated with their lipophilicity values, and modeling of adsorption of the compounds based on this relationship is possible. The predominant dissipation mechanism of herbicides in soils is bacterial degradation. The contribution of other mechanisms, such as degradation by fungi, photodegradation, or volatilization from soils, is much smaller. The rate of bacterial degradation decreased in the following order: 2,4-D > MCPA > mecoprop-P > dichlorprop-P. It was found that 2,4-D and MCPA have the lowest potential for leaching into groundwater and that mecoprop-P and dichlorprop-P have slightly higher potential. Because of limited data on adsorption and degradation of 2,4-DB and MCPB, estimation of their leaching potential was not possible. Environ Toxicol Chem 2016;35:271-286. # 2015 SETAC

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Sorption of 2,4-D and other phenoxy herbicides to soil, organic matter, and minerals

Cited by 54 publications

References 57 publications

Kinetics and isotherm analysis of 2,4-dichlorophenoxyl acetic acid adsorption onto soil components under oxic and anoxic conditions

Kinetics and isotherm analysis of 2,4-dichlorophenoxyl acetic acid adsorption onto soil components under oxic and anoxic conditions

Organic and Contaminant Geochemistry

Adsorption and degradation of phenoxyalkanoic acid herbicides in soils: A review

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