Co-metabolic degradation of dimethoate by Raoultella sp. X1

Liang, Yili; Fu-hua, Zeng; Qiu, Guanzhou; Lu, Xiangyang; Liu, Xueduan; Gao, Haichun

doi:10.1007/s10532-008-9227-x

Cited by 19 publications

(6 citation statements)

References 40 publications

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“…In their proper pH ranges, the removal efficiencies of DMA, TMA, DMFA and DMAB were 82–86% in 12 h, 74–81% in 16 h, 42–56% in 24 h and 40–45% in 24 h, respectively. Our results were consistent with the research of Liang et al , but were different from the research of Ji et al Liang et al reported that the optimal pH was 6–8 for the strain Raoultella sp. X1 to degrade dimethoate.…”

Section: Resultssupporting

confidence: 77%

“…TJ_DMAB were assigned the numbers JF701184, JF701185, JF701186 and JF701187, respectively, in GenBank. Figure 6 shows the effect of initial pH on the biodegradation of DMA 36 but were different from the research of Ji et al 37 Liang et al 36 reported that the optimal pH was 6-8 for the strain Raoultella sp. X1 to degrade dimethoate.…”

Section: Effect Of Srtmentioning

confidence: 70%

“…The highest removal efficiency and fastest degradation rate of DMA, TMA, DMFA and DMAB were achieved at 30, 30, 35 and 35°C, respectively. Liang et al reported that the optimal temperature for the strain Raoultella sp. X1 degrading dimethoate was 30°C.…”

Section: Resultsmentioning

confidence: 99%

“…TJ_DMAB, respectively, under aerobic conditions. The data were regressed using a zero-order reaction model and the wileyonlinelibrary.com/jctb 36 reported that the optimal temperature for the strain Raoultella sp. X1 degrading dimethoate was 30 ∘ C. Chen et al 38 reported that the strain Klebsiella oxytoca could tolerate a wide range of temperature, and propionitrile could be removed at temperatures of 20-40 ∘ C, while the best removal efficiency was achieved at 30 ∘ C. The results indicated that strains belonging to genus Raoultella and Klebsiella were mesophilic bacteria, which had an advantage in degrading NDMA precursors.…”

Section: Effect Of Srtmentioning

confidence: 99%

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Degradation of dimethylamine and three tertiary amines by activated sludge and isolated strains

Wang

2014

J of Chemical Tech & Biotech

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BACKGROUND N‐nitrosodimethylamine (NDMA) is an emerging disinfection byproduct. The effective and economical method to control NDMA is to remove its potential NDMA precursors. In this study, experiments were conducted to investigate the removals of four typical NDMA precursors (dimethylamine (DMA), trimethylamine (TMA), dimethylformamide (DMFA) and dimethylaminobenzene (DMAB)) by activated sludge and isolated strains. RESULTS Batch experiments indicated that the specific degradation rates of the four NDMA precursors follow the order DMA > TMA > DMFA > DMAB; and under different redox conditions, follow the order aerobic > anoxic > anaerobic. In an anaerobic–anoxic–aerobic activated sludge system, the optimal hydraulic retention time (HRT) and sludge retention time (SRT) were 10 h and 20 days, respectively, for the removals of both NDMA precursors and nutrients. Bacterial strains were isolated from aerobic activated sludge and identified based on 16S rDNA sequence analysis. A pH of 8–9 and temperature of 30–35°C were optimal for the removal of the four NDMA precursors by the isolated strains. Degradation of the four NDMA precursors by the isolated strains were fitted well by the Haldane model. CONCLUSION These results are helpful for knowledge of the removals of NDMA precursors during activated sludge treatment processes. © 2014 Society of Chemical Industry

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Section: Resultssupporting

confidence: 77%

Section: Effect Of Srtmentioning

confidence: 70%

Section: Resultsmentioning

confidence: 99%

Section: Effect Of Srtmentioning

confidence: 99%

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Degradation of dimethylamine and three tertiary amines by activated sludge and isolated strains

Wang

2014

J of Chemical Tech & Biotech

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“…This contrasting result suggested that strain ZP3 degraded fenpropathrin co-metabolically, which required an extra carbon source (glucose) (Liang et al 2009;Zhang et al 2009). …”

Section: Bacterial Growth and Degradation Abilitymentioning

confidence: 98%

Cometabolic biotransformation of fenpropathrin by Clostridium species strain ZP3

et al. 2010

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A novel bacterial strain capable of degrading the pyrethroid pesticide fenpropathrin was isolated from mixed wastewater and sludge samples. Phylogenetic analysis of the 16S rDNA sequence revealed that the organism belongs to the genus Clostridium. The organism can co-metabolically transform fenpropathrin at 100 mg l(-1) at 35°C and pH 7.5 in 12 days. Metabolic products of fenpropathrin from strain ZP3 were examined by gas chromatography/mass spectrometry, and the results showed that the organism degraded fenpropathrin with an oxidization process to yield benzyl alcohol, benzenemethanol, 3,5-dimethylamphetamine. Analyses of cell-free extracts from this strain showed that the optimal degrading conditions for degrading fenpropathrin were 35°C and pH 7.5, and degradation efficiency was 20.0 mg l(-1) day(-1), and it might be potential using for rapid treating fenpropathrin, for example, on the surface of fruits and vegetables.

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Environmental Fate and Toxicology of Dimethoate

Scoy

Pennell

Zhang

2016

Reviews of Environmental Contamination and Toxicology

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The insecticide dimethoate, an organophosphate, was first introduced in 1962 for broad spectrum control of a wide range of insects including mites, flies, aphids, and plant hoppers. It inhibits AChE activity, resulting in nerve damage, which may lead to death. It is considered highly toxic to insects although dimethoate resistance has been observed. Dimethoate has both a low vapor pressure (0.247 mPa) and Henry's law constant (l.42x10(-6) Pa m3/mol), thus volatilization is not a major route of dissipation from either water or moist soils. Photolysis is considered a minor dissipation pathway. However, studies have shown that in the presence of a catalyst, the rate of photolysis does increase. The insecticide has high water solubility (39,800 mg/L) and under alkaline conditions, hydrolysis predominates representing a major degradation pathway. It has a low soil sorption capacity (Koc=20) which varies by soil type and organic matter content. Dimethoate is degraded by microbes under anaerobic conditions and bacterial species have been identified that are capable of using dimethoate as a carbon source. Although many intermediate by-products have been identified by abiotic and biotic processes, the major degradation product is omethoate. Dimethoate has been found to adversely impact many organisms. In plants, photosynthesis and growth are highly impacted, whereas birds exhibit inhibition in brain enzyme activity, thus sublethal effects are apparent. Furthermore, aquatic organisms are expected to be highly impacted via direct exposure, often displaying changes in swimming behavior. Toxicity results include inhibition in growth and more importantly, inhibition of acetylcholinesterase activity.

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Co-metabolic degradation of dimethoate by Raoultella sp. X1

Cited by 19 publications

References 40 publications

Degradation of dimethylamine and three tertiary amines by activated sludge and isolated strains

Degradation of dimethylamine and three tertiary amines by activated sludge and isolated strains

Cometabolic biotransformation of fenpropathrin by Clostridium species strain ZP3

Environmental Fate and Toxicology of Dimethoate

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