What question did this study set out to answer?

To evaluate the biodegradation kinetics, metabolic intermediate products, and microbial toxicity of N-nitrosodimethylamine across aqueous and soil environments.

October 1, 1985Applied and Environmental MicrobiologyOpen Access

Biodegradation of N -Nitrosodimethylamine in Aqueous and Soil Systems

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To evaluate the biodegradation kinetics, metabolic intermediate products, and microbial toxicity of N-nitrosodimethylamine across aqueous and soil environments.
Measured initial mineralization rates across initial N-nitrosodimethylamine (NDMA) concentrations from picograms per milliliter to micrograms per milliliter using linear and nonlinear least-squares models.
Evaluated the impact of supplemental carbon and soil organic matter, tested continuous degradation in a laboratory-scale charcoal trickling filter, and identified degradation intermediates using high-pressure liquid chromatography with radioactivity detection.
Mineralization followed first-order reaction kinetics without reaching saturation, as log-log linear fit slopes were not significantly different from 1.0 (P < 0.05).
Rate constants and total percent mineralized increased with lower initial concentrations of NDMA; supplemental carbon slowed mineralization in aqueous environments but had minimal impact in soil systems.
Microorganisms tolerated NDMA up to 10 mg/ml without toxicity, achieved continuous degradation at 50 to 100 μg/ml in charcoal filters, and generated formaldehyde and methylamine as metabolic intermediates.

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Implication

Laboratory investigation reveals first-order biodegradation kinetics of N-nitrosodimethylamine in soil and water systems, indicating microbially mediated removal of environmental toxins.

Cite This Study

Kaplan et al. (1985) studied this question.

synapsesocial.com/papers/6a8289e5a7c6f3cae68ad5ea https://doi.org/10.1128/aem.50.4.1077-1086.1985

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Implication

Laboratory investigation reveals first-order biodegradation kinetics of N-nitrosodimethylamine in soil and water systems, indicating microbially mediated removal of environmental toxins.

Biodegradation of N -Nitrosodimethylamine in Aqueous and Soil Systems

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Discussion

Implication

Cite This Study

Biodegradation of N -Nitrosodimethylamine in Aqueous and Soil Systems

Key Points

Discussion

Implication

Cite This Study

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