Degradation of [carboxyl-14C] 2,4-D and [ring-U-14C] 2,4-D in 114 agricultural soils as affected by soil organic carbon content

Gaultier, Jeanette; Farenhorst, Annemieke; Cathcart, Jason; Goddard, Tom

doi:10.1016/j.soilbio.2007.08.003

Cited by 47 publications

(21 citation statements)

References 52 publications

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“…2,4-D was an anionic ionizable herbicides which was widely used on crops to control broad-leaf weeds. Despite its relatively short half life in soils [25], it is frequently detected in waters and posed a threat on surface and ground water contamination in the region of intensive agriculture due to its weak adsorption by soils [26]. 4-NP as an intermediate in anaerobic degradation of nonylphenol ethoxylates, occurs widespread in the environment, and is recognized as an environmental endocrine disrupting chemical [27].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of ionizable organic contaminants on multi-walled carbon nanotubes with different oxygen contents

Zhao

Quan

et al. 2011

Journal of Hazardous Materials

145

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Section: Introductionmentioning

confidence: 99%

Adsorption of ionizable organic contaminants on multi-walled carbon nanotubes with different oxygen contents

Zhao

Quan

et al. 2011

Journal of Hazardous Materials

145

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“…Degradation is a fundamental attenuation process for herbicides in soil . Degradation process may follow complex pathways and it is affected by many factors related to microbial, soil physical and chemical conditions (Gaultier et al 2008). Sorption and desorption of weak acid herbicides in soil are similarly key in controlling their transport, transformation and bioaccumulation processes (Socías-Viciana et al 1999;Gaultier et al 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Degradation process may follow complex pathways and it is affected by many factors related to microbial, soil physical and chemical conditions (Gaultier et al 2008). Sorption and desorption of weak acid herbicides in soil are similarly key in controlling their transport, transformation and bioaccumulation processes (Socías-Viciana et al 1999;Gaultier et al 2008). The sorption and desorption of weak acid herbicides in soil are dependent on the soil properties, such as soil organic carbon content, soil pH and the properties of the herbicide (Bekbölet et al 1999;Haberhauer et al 2000;Hiller et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Environmental Fate of the Herbicide MCPA in Two Soils as Affected by the Presence of Wheat Ash

Hiller

Bartaľ

Milicka

et al. 2008

Water Air Soil Pollut

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This study was conducted to evaluate the environmental fate processes of the herbicide (4-chloro-2-methylphenoxy)acetic acid (MCPA) in agricultural soils in the presence and absence of ash originating from the burning of wheat residue. The ash-amended soils (1% ash by weight) were approximately 8-16 times more effective than the ash-free soils in sorbing MCPA. The desorption results showed that 40-78% of initially sorbed MCPA were desorbed in both soils, depending on the initial MCPA concentration in solution. Addition of ash to soils decreased the desorption of MCPA by approximately 20%. Degradation of MCPA was substantially reduced in the presence of the ash. A 6-week incubation resulted in 50-85% of MCPA microbially degraded in ash-amended soils, as compared to >85-100% in ashfree soils under the same conditions.

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“…Modeling and normalizing by EBCT. First-order relationships for trace organic removals have been shown by others in fixed-bed filters (Zearley & Summers 2012, DiGiano et al 2001, batch reactors (Schmidt et al 1985), and soils (Gaultier et al 2008). Using a pseudo-first-order rate model as shown in Eq 1, a first-order rate constant, k, was calculated using the EBCT and effluent, C eff , and influent, C inf , concentrations (Zearley & Summers 2012).…”

Section: Methodsmentioning

confidence: 99%

MIB and 2,4‐D Removal by Biofilters During Episodic Loading

Zearley

Summers

2015

Journal AWWA

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Episodic occurrences of trace organic contaminants may affect their removal by biofilters. Removal of the naturally occurring algal metabolite 2‐methylisoborneol (MIB) and the herbicide 2,4‐dichlorphenoxyacetic acid (2,4‐D) by seven biofilters with an average empty bed contact time (EBCT) of 8.7 min is presented under a range of intermittent exposure conditions with continuous presence of dissolved organic matter. An average 70% removal of both MIB and 2,4‐D was found under constant exposure conditions over seven months. With the use of a pseudo‐first‐order model, much of the variability in removal during this time could be explained by EBCT changes. Microorganisms in the biofilters retained the capacity to biodegrade MIB and 2,4‐D after non‐exposure periods of up to five months. However, after nine months of non‐exposure, the MIB and 2,4‐D removals were lower than with the control biofilter, although the biofilter began to quickly reacclimate to these contaminants.

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Degradation of [carboxyl-14C] 2,4-D and [ring-U-14C] 2,4-D in 114 agricultural soils as affected by soil organic carbon content

Cited by 47 publications

References 52 publications

Adsorption of ionizable organic contaminants on multi-walled carbon nanotubes with different oxygen contents

Adsorption of ionizable organic contaminants on multi-walled carbon nanotubes with different oxygen contents

Environmental Fate of the Herbicide MCPA in Two Soils as Affected by the Presence of Wheat Ash

MIB and 2,4‐D Removal by Biofilters During Episodic Loading

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