Biomineralization of atrazine ozonation products. Application to the development of a pesticide waste disposal system

Leeson, Andrea; Hapeman, Cathleen J.; Shelton, Daniel R.

doi:10.1021/jf00030a030

Cited by 23 publications

(27 citation statements)

References 10 publications

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“…Thus, the mineralization of CAAT requires microorganisms that can effectively utilize CAAT as a nitrogen source even in the presence of inorganic nitrogen sources, such as ammonium nitrate (a typical fertilizer found in pesticide waste). Such an organism was isolated from sewage sludge and identified as a bacterium (K. terragena, strain DRS-I) (Leeson et al, 1993).…”

Section: Resultsmentioning

confidence: 99%

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Total mineralization of aqueous atrazine in the presence of ammonium nitrate using ozone and Klebsiella terragena (strain drs-i): mechanistic considerations for pilot scale disposal

Hapeman¹,

Karns²,

Shelton³

1995

J. Agric. Food Chem.

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s-Triazines have been found to be somewhat recalcitrant to enhanced biomineralization (preoxidation prior to microbial degradation). Atrazine ozonation studies provided evidence for a hydroxy radical process in which kinetics are sterically rather than electronically controlled. These results enabled the optimization of the ozonation procedures and the isolation of an organism better adapted for pesticide waste streams. Klebsiella terragena (strain DRS-I) was shown to effectively utilize chlorodiamino-s-triazine (CAAT), the final oxidation product of atrazine, as a nitrogen source in the presence of NH4N03, a fertilizer often found in pesticide waste. Evidence for the metabolic pathway is provided, which was shown to proceed via aminochlorohydroxy-s-triazine (COAT) followed by dechlorination and total mineralization. Formulated atrazine was successfully mineralized in a pilot scale system (ca. 200 L) with and without NH4N03 present. Ozonation efficiencies were nearly identical in both cases; degradation of CAAT and COAT was readily achieved after ca. 1 day of incubation.

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Section: Resultsmentioning

confidence: 99%

“…High ammonia concentrations (ca. 1%) were found a priori to be responsible for the inhibition of microbial degradation (Leeson et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

Total mineralization of aqueous atrazine in the presence of ammonium nitrate using ozone and Klebsiella terragena (strain drs-i): mechanistic considerations for pilot scale disposal

Hapeman¹,

Karns²,

Shelton³

1995

J. Agric. Food Chem.

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“…3a). Leeson et al (1993) reported enhanced microbial degradation of various pesticides following chemical pretreatment. They observed complete degradation of atrazine after applying corn syrup to pretreated soil containing a high nitrogen concentration.…”

Section: Secondary Treatment Of Windrowed Soilmentioning

confidence: 99%

“…Degradation can be maximized by combining chemical treatment (e.g., Fe 0 ) with biological degradation. Enhanced microbial degradation of pesticides (Leeson et al 1993), polyaromatic hydrocarbons (PAHs; Nam et al 2001), and explosives (Adam et al 2005) has been reported following chemical pretreatment of soil and water.…”

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Sequencing Zerovalent Iron Treatment with Carbon Amendments to Remediate Agrichemical-Contaminated Soil

Boparai

Shea

Comfort

et al. 2008

Water Air Soil Pollut

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Agrichemical spills and discharges to soil can cause point-source contamination of surface and ground waters. When high contaminant concentrations inhibit natural attenuation in soils, chemical treatments can be used to promote degradation and allow application of treated soils to agricultural lands. This approach was used to remediate soil containing >650 mg atrazine, >170 mg metolachlor and >18,000 mg nitrate kg −1 . Results indicated a decrease in metolachlor concentration to <1 mg kg −1 within 95 days of chemical treatment with zerovalent iron (Fe 0 , 5% w/w) and aluminum sulfate (Al 2 (SO 4 ) 3 , 2% w/w) but after one year >150 mg atrazine and >7000 mg nitrate kg −1 remained. Laboratory experiments confirmed that subsequent additions of sucrose (table sugar) to the chemically pretreated soil promoted further reductions in atrazine and nitrate concentrations. Field-scale results showed that adding 5% (w/w) sucrose to windrowed and pretreated soil significantly reduced atrazine (<38 mg kg −1 ) and nitrate (<2,100 mg kg −1 ) concentrations and allowed for land application of the treated soil. These results provide evidence that zerovalent iron in combination with Al 2 (SO 4 ) 3 and sucrose can be used for on-site, field-scale treatment of pesticide-and nitrate-contaminated soil.

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Integrating chemical and biological remediation of atrazine and S‐triazine‐containing pesticide wastes

Arnold

Hickey

Harris

et al. 1996

Enviro Toxic and Chemistry

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Fenton's reagent (FR) and the catabolic activity of Rhodococcus corallinus and Pseudomonas sp. strain D were combined to detoxify s‐triazines in pure solutions and mixed wastes. In solutions containing only atrazine, complete atrazine decomposition was accomplished with 2.69 mM FR. But FR treatment was not complete in a remediation context because stable, potentially carcinogenic chlorinated products accumulated as end products. Rhodococcus corallinus degraded these products in ≤10 min and produced 47% 14CO2 from [2,4,6‐14C]atrazine in 7 d. Combining R. corallinus with Pseudomonas sp. strain D increased 14CO2 production to 73%. When applied to a pesticide rinse water containing atrazine, cyanazine, alachlor, metolachlor, and EPTC, ≥99% of the pesticides were degraded with 12.2 mM FR. Subsequent treatment with R. corallinus and Pseudomonas sp. strain D degraded all chlorinated s‐triazine intermediates and released 70% 14CO2 from a [2,4,6‐14C]atrazine tracer in 10 d. Use of R. corallinus obviated the need for additional chemical pretreatment, e.g., acidification or base hydrolysis, used in previous studies prior to microbial incubations. Thus, this method has potential as an on‐site treatment for pesticide rinse water.

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Biomineralization of atrazine ozonation products. Application to the development of a pesticide waste disposal system

Cited by 23 publications

References 10 publications

Total mineralization of aqueous atrazine in the presence of ammonium nitrate using ozone and Klebsiella terragena (strain drs-i): mechanistic considerations for pilot scale disposal

Total mineralization of aqueous atrazine in the presence of ammonium nitrate using ozone and Klebsiella terragena (strain drs-i): mechanistic considerations for pilot scale disposal

Sequencing Zerovalent Iron Treatment with Carbon Amendments to Remediate Agrichemical-Contaminated Soil

Integrating chemical and biological remediation of atrazine and S‐triazine‐containing pesticide wastes

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