Study of the spatial variation of the biodegradation rate of the herbicide bentazone with soil depth using contrasting incubation methods

Rodríguez‐Cruz, M. Sonia; Jones, John D. S.; Bending, Gary D.

doi:10.1016/j.chemosphere.2008.07.044

Cited by 21 publications

(15 citation statements)

References 31 publications

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“…2, Table 2), which corroborates the findings of other authors (Blume et al, 2004;Rodríguez-Cruz et al, 2008;Shapir and Mandelbaum, 1997;Yen et al, 1994). The activity of soildwelling microorganisms and their ability to degrade pesticides are positively correlated with organic matter content (Ghafoor et al, 2011b;Kah et al, 2007), which decreases with soil depth.…”

Section: Resultssupporting

confidence: 82%

“…This model assumes that the number of pesticide molecules is small relative to the number of degrading microorganisms and their enzymes, and, consequently, that the degradation rate at any time is directly proportional to the actual concentration remaining in the system (FOCUS, 2006). The first-order kinetic model is generally regarded as indicative of cometabolic degradation, where the process does not result in the proliferation of degrading organisms (Rodríguez-Cruz et al, 2008;Schmidt et al, 1985). In some circumstances, such kinetics could reflect the behaviour of the compound as a primary substrate without inducing major changes in the size of microbial populations (Rodríguez-Cruz et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

“…The first-order kinetic model is generally regarded as indicative of cometabolic degradation, where the process does not result in the proliferation of degrading organisms (Rodríguez-Cruz et al, 2008;Schmidt et al, 1985). In some circumstances, such kinetics could reflect the behaviour of the compound as a primary substrate without inducing major changes in the size of microbial populations (Rodríguez-Cruz et al, 2008). First-order kinetics has been observed previously for alachlor (Rodríguez-Cruz and Lacorte, 2005), bentazone (Ghafoor, 2011a;Li et al, 2008) and atrazine (Fang et al, 2015;Jenks et al, 1998;Li et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

“…However, this correlation is much weaker in subsoils. The degradation rate in soil horizons with a depth of around 1 m is often lower than that estimated based on biomass content and other indicators of microbial activity, including organic matter content (Paszko, 2009;Rodríguez-Cruz et al, 2008). Therefore, the best method so far is the direct determination of degradation rates in individual soil horizons.…”

Section: Introductionmentioning

confidence: 99%

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Degradation rates of alachlor, atrazine and bentazone in the profiles of Polish Luvisols

Paszko¹,

Muszyński²

2017

International Agrophysics

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A b s t r a c t. The degradation rates of three herbicides (alachlor, atrazine, and bentazone) were examined according to OECD Guideline 307 in three profiles of grey-brown podzolic soil (Luvisol) in a laboratory experiment. The aim of the experiment was to determine herbicide degradation parameters and their relationships with soil properties. Degradation processes were effectively described by a first-order model. However, in some cases, the best results were produced by bi-phasic kinetics (hockey-stick and bi-exponential model). The degradation rates of the tested herbicides at 25°C and 40% maximum water holding capacity, established based on half-life values in the Ap horizon, increased in the following order: atrazine (32.6-42.8 days)

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Section: Resultssupporting

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Degradation rates of alachlor, atrazine and bentazone in the profiles of Polish Luvisols

Paszko¹,

Muszyński²

2017

International Agrophysics

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“…For instance, bentazone is biodegradable in topsoils under aerobic conditions (Huber and Otto, 1994;Leistra et al, 2001;Li et al, 2008;Rodriguez-Cruz et al, 2008;Larsbo et al, 2009), but it appears to be recalcitrant in aquifers under aerobic conditions (Tuxen et al, 2000;Broholm et al, 2001). In contrast, the degradation of mecoprop and dichlorprop has been observed both in topsoil (Smith, 1989) and in aquifers under aerobic conditions (see the reviews of Buss et al, 2006;Reitzel et al, 2004;Janniche et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Stimulation of aerobic degradation of bentazone, mecoprop and dichlorprop by oxygen addition to aquifer sediment

Levi

Hybel

Bjerg

et al. 2014

Science of The Total Environment

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Different Effects of a By‐product From Olive Oil Extraction on S‐Metolachlor and Bentazone Soil Fate

Cañero

Cox

Cabrera

et al. 2014

CLEAN Soil Air Water

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Bentazone and S‐metolachlor are herbicides widely used for the control of broad leaf weeds in crops such as corn and soybean. The effect of the addition to soils with different texture and organic matter content of an organic waste (OW) from oil olive production (alperujo) on different processes affecting behaviour of both herbicides was evaluated. Sorption of S‐metolachlor increased upon amendment. A six‐fold increase could be observed for Kd values on the sandy soil amended at 10% rate and a five‐fold increase on the soil with higher content on clay (48%) and same rate of OW (10%). The results revealed that although an increase in soil total pore volume was found upon amendment (from 210 to 266 mm3 g−1 in sandy (S) soil, from 215 to 251 in clayey (19% silt) (T) soil, and from 240 to 289 in clayey (50% silt) (E) soil), leaching of the herbicide S‐metolachlor was greatly reduced (from 61 to 3.5% in the S‐soil and from 37 to <1% in the clayey T‐soil) since its behaviour in soils is strongly affected by sorption processes. Bentazone leaching was only slightly delayed upon amendment. Half‐life of both herbicides also increased upon amendment. The greatest increase was observed with the higher rate of OW (10%) in the soils with higher content of clay (48% in T‐soil and 31% in E‐soil). A 17‐fold increase was observed for S‐metolachlor half‐life in T‐soil and a four‐fold increase for bentazone in E‐soil. Thus, the use of the by‐product from olive oil extraction can be a good strategy to reduce the off‐site movement of S‐metolachlor by increasing its soil sorption, and therefore the risk of water pollution can be diminished. However, the higher persistence of both herbicides in organic amended soils should be taken into account.

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Study of the spatial variation of the biodegradation rate of the herbicide bentazone with soil depth using contrasting incubation methods

Cited by 21 publications

References 31 publications

Degradation rates of alachlor, atrazine and bentazone in the profiles of Polish Luvisols

Degradation rates of alachlor, atrazine and bentazone in the profiles of Polish Luvisols

Stimulation of aerobic degradation of bentazone, mecoprop and dichlorprop by oxygen addition to aquifer sediment

Different Effects of a By‐product From Olive Oil Extraction on S‐Metolachlor and Bentazone Soil Fate

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