Effect of dairy manure and sewage sludge on 14C-pesticide degradation in soil

Doyle, Richard C.; Kaufman, Donald D.; Burt, G. W.

doi:10.1021/jf60218a008

Cited by 65 publications

(29 citation statements)

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“…Such effects are attributed to the increased C and energy supply as rhizodeposition by plants to soil microflora responsible for the degradative process in soil. Similar effects have also been reported for other pesticides (Doyle and Kaufman, 1978;DuahYentumi and Kuwatsuka, 1980;Gerstl and Helling, 1985). Soil treatments like disturbance, freezing and thawing, wetting and drying, grinding and fumigation may also affect degradation of pesticides, as has been observed for other organic substances (Bottner, 1985;Jackobson et al, 1980;Jenkinson, 1966;Soulas et al, 1984).…”

Section: Introductionsupporting

confidence: 66%

Fate of [carbonyl-14C]methabenzthiazuron in an arid region soil — effect of organic amendment, soil disturbance and fumigation

1988

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Abstract[Carbonyl-~4C] methabenzthiazuron (MBT) was applied to an arid region soil at a rate of 5 mg kg-~ soil to give a ~4C content of 2400 KB kg-~ soil. After 15 weeks of incubation at 22~ and 50% of the maximum water holding capacity of the soil, 7.2% of the applied ~4C was mineralized to ~4CO 2. Where the soil was amended with wheat straw, total mineralization increased to 17.3%. Soil disturbance caused a significant increase while chloroform fumigation caused a significant decrease in the rate of ~4CO2 production, both from amended and unamended soils. These results suggest that MBT is degraded mainly through microbial co-metabolism.Wheat straw amendment resulted in increased transformation of MBT into soil humus. In unamended soil, a major portion of ~4C was recovered in fulvic acid and in fractions extracted with organic solvents. Recovery of ~4C in non-extractable bound residues (humins) increased as incubation progressed and seemed to be derived from the fulvic acid fraction, which showed a concomitant decrease.More than 99% of the ~sidual ~4C in unamended soil consisted of unaltered MBT; the remainder occurred as 1-methyl-1 (benzthiazolyl) urea. In amended soil, a relatively higher percentage of the extractable ~4C was found in the metabolite. Small amounts of three unidentified ~4C-labelled compounds were also observed.In amended soil, disturbance caused a decrease in extractable-~4C whereas fumigation caused a significant increase, as compared to the untreated control. The effects were more pronounced when the soils were treated at an early stage of incubation. In general, soil disturbance increased the availability of MBT for further transformations while chloroform fumigation decreased the process.

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Section: Introductionsupporting

confidence: 66%

Fate of [carbonyl-14C]methabenzthiazuron in an arid region soil — effect of organic amendment, soil disturbance and fumigation

1988

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“…Contrary to all the success stories, literature mentions the possible inhibitory effects of organic amendments and nutrient addition on herbicide mineralization in soil. The reduction in microbial degradation of herbicides is often explained by the decrease of pesticide availability after increase in their sorption [80]. Herbicide degradation in soils amended with organic materials can be modified, depending on the organic amendment and the herbicide properties.…”

Section: Biostimulation: Cynical Aftermathsmentioning

confidence: 99%

Biostimulation for the Enhanced Degradation of Herbicides in Soil

Kanissery

Sims

2011

Applied and Environmental Soil Science

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Cleanup of herbicide-contaminated soils has been a dire environmental concern since the advent of industrial era. Although microorganisms are excellent degraders of herbicide compounds in the soil, some reparation may need to be brought about, in order to stimulate them to degrade the herbicide at a faster rate in a confined time frame. "Biostimulation" through the appropriate utilization of organic amendments and nutrients can accelerate the degradation of herbicides in the soil. However, effective use of biostimulants requires thorough comprehension of the global redox cycle during the microbial degradation of the herbicide molecules in the soil. In this paper, we present the prospects of using biostimulation as a powerful remediation strategy for the rapid cleanup of herbicide-polluted soils.

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“…The possibility that these organisms were growing on impurities in the culture medium and simply precipitating dinoseb must be considered. Doyle et al, however, reported ~4CO2 evolution from ~4C-dinoseb added to soil [4], indicating that dinoseb mineralization is possible. Another group [21] concluded that dinoseb was not biodegradable in an activated sludge reactor; however, they allowed only 18 days for acclimation, which was probably insufficient for successful microbial selection.…”

Section: Introductionmentioning

confidence: 97%

Selection and isolation of bacteria capable of degrading dinoseb (2-sec-buty-4,6-dinitrophenol)

Stevens

Crawford

1991

Biodegradation

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Dinoseb (2-sec-butyl-4,6-dinitrophenol) has been a widely used herbicide that persists in some contaminated soils, and has been found in groundwaters, causing health and environmental hazards. Persistence in some soils may stem from a lack of dinoseb-degrading organisms. We established a chemostat environment that was strongly selective for aerobic (liquid phase) and anaerobic (sediment phase) bacteria able to degrade dinoseb. The chemostat yielded five taxonomically diverse aerobic isolates that could transform dinoseb to reduced products under microaerophilic or denitrifying conditions, but these organisms were unable to degrade the entire dinoseb molecule, and the transformed products formed multimeric material. The chemostat also yielded an anaerobic consortium of bacteria that could completely degrade dinoseb to acetate and CO2 when the Eh of the medium was less than -200 mV. The consortium contained at least three morphologically different bacterial species. HPLC analysis indicated that dinoseb was degraded sequentially via several as yet unidentified products. Degradation of these intermediates was inhibited by addition of bromoethane sulfonic acid. GC-MS analysis of metabolites in culture medium suggested that regiospecific attacks occurred non-sequentially on both the nitro groups and the side-chains of dinoseb. The consortium was also able to degrade 4,6-dinitro-o-cresol, 3,5-dinitrobenzoic acid, 2,4-dinitrotoluene, and 2,6-dinitrotoluene via a similar series of intermediate products. The consortium was not able to degrade 2,4-dinitrophenol. To our knowledge, this is the first report of strictly anaerobic biodegradation of an aromatic compound containing a multicarbon, saturated hydrocarbon side chain.

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Effect of dairy manure and sewage sludge on 14C-pesticide degradation in soil

Cited by 65 publications

References 0 publications

Fate of [carbonyl-14C]methabenzthiazuron in an arid region soil — effect of organic amendment, soil disturbance and fumigation

Fate of [carbonyl-14C]methabenzthiazuron in an arid region soil — effect of organic amendment, soil disturbance and fumigation

Biostimulation for the Enhanced Degradation of Herbicides in Soil

Selection and isolation of bacteria capable of degrading dinoseb (2-sec-buty-4,6-dinitrophenol)

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