Fate of Fenthion in Salt-Marsh Environments: I. Factors Affecting Biotic and Abiotic Degradation Rates in Water and Sediment

Cripe, C. R.; O'Neill, Ellen J.; Woods, Michael; Gilliam, Wallace T.; Pritchard, P. H.

doi:10.1897/1552-8618(1989)9[747:fofise]2.0.co;2

Cited by 6 publications

(8 citation statements)

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“…It must be pointed out that the water types differ also in their chemical composition [e.g., influence of the ionic strength (5), fulvic and humic acids (20), and microbial activity (3)]. No comparison between sterile and nonsterile water was performed in this study as many studies have already dealt with this phenomenom (7,21,22): they have shown that biodegradation increases the total rate of degradation. For parathion, biodegradation is predominant over chemical degradation, whereas the contrary is true for chlorpyrifos (21).…”

Section: Resultsmentioning

confidence: 99%

“…Most of the time, tm were in the same order in SW and FRW: for instance, at T = 22 °C, ty2 = 21/23 day for bromophos and tm = 29/36 day for dimethoate in FRW and SW, respectively. Sometimes, longer half-lives were observed in SW with respect to FRW: for coumaphos at T = 22 °C, tn2= 70 day in SW and t\¡2 = 29 day in FRW. The half-lifetimes are even similar for azinphos-ethyl in SW (r1/2 = 58 day) and in RW {tm = 65 day).…”

Section: Influence Of Environmentalmentioning

confidence: 99%

See 1 more Smart Citation

Degradation Kinetics of Organophosphorus and Organonitrogen Pesticides in Different Waters under Various Environmental Conditions

Lartiges¹,

Garrigues²

1995

Environ. Sci. Technol.

192

116

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Section: Resultsmentioning

confidence: 99%

Section: Influence Of Environmentalmentioning

confidence: 99%

Degradation Kinetics of Organophosphorus and Organonitrogen Pesticides in Different Waters under Various Environmental Conditions

Lartiges¹,

Garrigues²

1995

Environ. Sci. Technol.

192

116

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“…157) The participation of benthic microbes was supported by approximately 5-fold acceleration in the biodegradation of fenthion (43) and p-chlorophenol with a 10-fold increase of a sediment content in estuarine waters. 47,158) In the sedimentenhanced biodegradation of parathion-methyl (41), there was no correlation between the degradation rate and c.f.u. in water.…”

Section: Sedimentmentioning

confidence: 99%

“…25) The presence of the whole plant or roots of Spartina alterniflora resulted in the 100-fold accelerated degradation of fenthion (43), with the enhancement stepwise decreasing by one order of magnitude when the outside and inside portions of its leaves were used, indicating the high activity of epiphytic bacteria. 47) Many epiphytic bacteria isolated from the surface of common reeds were found to efficiently degrade deltamethrin (38). 132) Furthermore, pesticide adsorption and uptake by phototrophic macrophytes and algae are known to be important for pesticide dissipation.…”

Section: Macrophytes and Biofilmmentioning

confidence: 99%

Aerobic microbial transformation of pesticides in surface water

Katagi

2013

J. Pestic. Sci.

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Aerobic transformation by microbial organisms is a dissipation process of pesticides in surface water, but the corresponding information is much less available as compared with their microbial degradation in soil. Bacteria freely floating in water or associated with suspended particles are the key microorganisms degrading pesticides; their species and populations, however, depend on sites and seasons. The various factors related to pesticide properties, experimental conditions and characteristics of surface water are involved in the complex control of microbial processes. Bottom sediment and macrophytes with associated biofilms not only act as sink for pesticides but also provide the habitat for both bacteria and fungi that degrade pesticides. More understanding of each factor is necessary to utilize laboratory biodegradation data for the refined assessment of pesticide behavior in surface water.

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“…Fenthion is easily degraded to fenthion-sulfoxide in soil under aerobic conditions, 37) and the DT 50 of fenthion is 1.5 days in a water-sediment system. 40,41) The half life of fenthion-sulfoxide in water and soil under aerobic conditions (DT 50 ϭ 12.7-16.0 days) 42) is longer than that of the parent compound. For this reason, fenthion-sulfoxide was rapidly formed in paddy fields and was the main compound detected in river water.…”

Section: Insecticide Metabolitesmentioning

confidence: 99%

Behavior of paddy pesticides and major metabolites in the Sakura River, Ibaraki, Japan

et al. 2010

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Thirty-nine paddy pesticides and 11 of their metabolites were monitored in the Sakura River during the rice cultivation season in 2007 and 2008. Pesticide concentrations in the river water depended on the timing of pesticide application. Herbicides that were shipped to Ibaraki Prefecture in large amounts or had high water solubility, a low soil adsorption constant value, or large usage rates were detected at high peak concentrations. The concentrations of nursery-box-applied fungicides and insecticides peaked immediately after transplanting. The concentrations of pesticide metabolites, such as bromobutide-desbromo, cafenstrol-descarbamoyl, clomeprop-propionic acid, carbofuran, and fenthion-sulfoxide depended on the degradation rates and metabolic pathways of the parent compounds and on the stability of the metabolites in water and soil. Clomeprop-propionic acid, carbofuran, and fenthion-sulfoxide, which were formed from rapidly degradable pesticides, were detected at much higher peak concentrations than the parent compounds. © Pesticide Science Society of Japan Keywords: paddy pesticide, application timing, river water, physicochemical property, metabolic pathway, environmental fate. Original Articlefield area is under rice cultivation. After soil puddling and land leveling in late April, rice seedlings are transplanted in early May. Intermittent irrigation starts in mid-June and continues throughout the growing period, except during the midsummer drainage period from late June to mid-July. Generally, heading occurs from late July to early August, and harvest starts in early September, after drainage of the paddy water in late August. 15)Early-mid-season herbicides are applied within 2 weeks after transplanting (early to mid-May), and mid-season herbicides are applied 2-3 weeks after transplanting (late May to early June). Depending on the emergence of weeds, a lateseason herbicide might be used in June.16) Fungicides and insecticides are used on rice seedlings in nursery boxes before transplanting and for direct application to paddy fields before heading or harvest. Recently, nursery-box application has become increasing popular in the Sakura River basin. Aerial spraying of paddy pesticides was not conducted in the basin in 2007 and 2008 (Japan Agricultural Aviation Association: private communication; unpublished data). Analyzed compoundsTwenty-nine herbicides, 2 fungicides, and 8 insecticides were selected for analysis (Table 1), in consideration of the amounts of paddy pesticides shipped to Ibaraki Prefecture recently. We selected 11 metabolites of the herbicides and insecticides in accord with previous studies 11,14,17,18) as a reference. All analytical standards were purchased from Wako Pure Chemicals Industries (Japan), Hayashi Pure Chemicals Industries (Japan), or Kanto Chemicals (Japan). Sample collection and analysisThe sampling site (Kimijima Bridge) is located midway along the course of the Sakura River (Fig. 1). Water samples (approximately 3000 ml per sample) were collected once a week on Monday fr...

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Fate of Fenthion in Salt-Marsh Environments: I. Factors Affecting Biotic and Abiotic Degradation Rates in Water and Sediment

Cited by 6 publications

References 0 publications

Degradation Kinetics of Organophosphorus and Organonitrogen Pesticides in Different Waters under Various Environmental Conditions

Degradation Kinetics of Organophosphorus and Organonitrogen Pesticides in Different Waters under Various Environmental Conditions

Aerobic microbial transformation of pesticides in surface water

Behavior of paddy pesticides and major metabolites in the Sakura River, Ibaraki, Japan

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