Biodegradation Kinetics for Pesticide Exposure Assessment

Wolt, Jeffrey D.; Nelson, Henry P.; Cleveland, Cheryl B.; Wesenbeeck, I. J. van

doi:10.1007/978-1-4613-0107-3_2

Cited by 19 publications

(26 citation statements)

References 38 publications

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“…1, is the biexponential equation (Wolt et al 2000). This pseudomechanistic model assumes that the decaying material partitions into two compartments within the soil (such as sorbed and solution), and that the rate of decay in each compartment differs.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the nonlinear routines for these models did not always converge on one of the three parameters (Table 3). In Wolt et al 2000. remaining ϭ (concentration in compartment 1) (e Ϫk 1 * time ) ϩ (100 Ϫ concentration in compartment 1) (e Ϫk 2 * time ).…”

Section: Resultsmentioning

confidence: 99%

“…A stan- dard biphasic (biexponential) model (Wolt et al 2000) was also Þt to the data for comparative purposes. The biexponential equation was solved using nonlinear regression (PROC NLIN, SAS Institute 1990).…”

Section: Methodsmentioning

confidence: 99%

“…The percent remaining protein, and the sum of the incubation time and the constant, are both transformed using a logarithmic function. This model is also applied to degradation data for other proteins and synthetic organic molecules, and comparisons are made to a standard biphasic (biexponential) model (Wolt et al 2000).…”

mentioning

confidence: 99%

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Rapid Degradation of a Binary, Ps149B1, &dgr;-Endotoxin ofBacillus thuringiensisin Soil, and a Novel Mathematical Model for Fitting Curve-Linear Decay

Herman¹,

Scherer²,

Wolt³

2002

Environ Entomol

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Rapid Degradation of a Binary, Ps149B1, &dgr;-Endotoxin ofBacillus thuringiensisin Soil, and a Novel Mathematical Model for Fitting Curve-Linear Decay

Herman¹,

Scherer²,

Wolt³

2002

Environ Entomol

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“…Aside from fate-monitoring activities under laboratory and field conditions, there are further numerous approaches for the assessment of the long-term behavior of pesticides in soils by means of kinetic models. Wolt et al [5] presented an overview of the biodegradation kinetics for pesticides. These are mostly linear, distinguishing labile and recalcitrant fractions and concentrations in solute and sorbed phases.…”

Section: Introductionmentioning

confidence: 99%

Metabolic Fate Modeling of Selected Human Pharmaceuticals in Soils

Richter

Kullmer

Kreuzig

2007

CLEAN Soil Air Water

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Dedicated to Prof. Dr. mult. Dr. h. c. Müfit Bahadir on the occasion of his 60 th birthdayAs a consequence of human pharmaceuticals being found in surface, ground and drinking water, there is growing interest in their fate and behavior in soil environments. Therefore, laboratory tests on the degradation of the 14 C-labeled model substances ibuprofen and diazepam were performed in two different soils. Based on the results of the laboratory-batch experiments, metabolic fate models have been devised using model discriminating techniques based on likelihood tests for nested models. Although, the data for ibuprofen fit well into the frame of linear compartment theory, the diazepam data show pronounced nonlinearities. The kinetic behavior of both pharmaceuticals in soil is characterized by the participation of microbial processes in the formation of non-extractable residues and by low degradation rates out of the non-extractable fractions. An accumulation of those non-extractable residues may occur in soils under simulated multiple contaminations.

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Activity and ecological implications of maize‐expressed transgenic endo‐1,4‐β‐D‐glucanase in agricultural soils

Kenny

Wolt

2014

Enviro Toxic and Chemistry

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Plant expression of thermostable endoglucanase (E1) has been proposed for improved conversion of lignocellulose to ethanol for fuel production. Residues of E1-expressing maize may affect ecological services (e.g., C mineralization and biogeochemical cycling) on soils where they occur. Therefore, the activity of residual E1 was investigated using soils amended with bacterial and plant-solubilized E1 compared with soil endogenous activity and residual activity from a mesostable cellulase (Aspergillus and Trichoderma spp.). An optimized analytical method involving a carboxymethyl cellulose substrate and dinitrosalicylic acid detection effectively assayed endoglucanase activity in amended and unamended soils and was used for determining E1 activity in 3 representative soils. The effect of E1 on soil carbon mineralization was determined by comparing CO(2) evolution from soils amended with transgenic E1-expressing and wild-type maize tissue. Extraction and recovery of the mesostable comparator, bacterial E1, and plant-soluble E1 showed nearly complete loss of exogenous endoglucanase activity within a 24-h period. Carbon mineralization indicated no significant difference between soils amended with either the transgenic E1 or wild-type maize tissue. These results indicate that maize residues expressing up to 30 µg E1/g tissue negligibly affect soil endoglucanase activity and CO(2) respiration for representative soils where transgenic E1 maize may be grown.

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Biodegradation Kinetics for Pesticide Exposure Assessment

Cited by 19 publications

References 38 publications

Rapid Degradation of a Binary, Ps149B1, &dgr;-Endotoxin ofBacillus thuringiensisin Soil, and a Novel Mathematical Model for Fitting Curve-Linear Decay

Rapid Degradation of a Binary, Ps149B1, &dgr;-Endotoxin ofBacillus thuringiensisin Soil, and a Novel Mathematical Model for Fitting Curve-Linear Decay

Metabolic Fate Modeling of Selected Human Pharmaceuticals in Soils

Activity and ecological implications of maize‐expressed transgenic endo‐1,4‐β‐D‐glucanase in agricultural soils

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