Co-metabolic degradation of bensulfuron-methyl in laboratory conditions

Wei, Luo; Zhao, Yong; Ding, Haitao; Lin, Xiaoyan; Zheng, Huabao

doi:10.1016/j.jhazmat.2008.02.115

Cited by 88 publications

(20 citation statements)

References 26 publications

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“…Luo et al (2008) founded that the degradation of 100 mg·L −1 bensulphuron-methyl in the presence of 1000 mg·L −1 ammonium chloride was greater than in the sample without it. Moreover [37], Qiao and Wang (2010), demonstrated the opposite effect, who found that 100 mg·L −1 ammonium chloride mildly inhibits the biodegradation of 900 mg·L −1 pyridine [46]; Cai et al (2013) illustrated that the addition of ammonium did not have an evident growth-promoting effect while slightly inhibiting the degradation of piperazine [43]. Based on these studies, appropriate amounts of an extra nitrogen source may inhibited the biodegradation of toxic compounds.…”

Section: Resultsmentioning

confidence: 99%

Microbial Degradation of Acetamiprid by Ochrobactrum sp. D-12 Isolated from Contaminated Soil

et al. 2013

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Neonicotinoid insecticides are one of the most important commercial insecticides used worldwide. The potential toxicity of the residues present in environment to humans has received considerable attention. In this study, a novel Ochrobactrum sp. strain D-12 capable of using acetamiprid as the sole carbon source as well as energy, nitrogen source for growth was isolated and identified from polluted agricultural soil. Strain D-12 was able to completely degrade acetamiprid with initial concentrations of 0–3000 mg·L−1 within 48 h. Haldane inhibition model was used to fit the special degradation rate at different initial concentrations, and the parameters q max, K s and K i were determined to be 0.6394 (6 h)−1, 50.96 mg·L−1 and 1879 mg·L−1, respectively. The strain was found highly effective in degrading acetamiprid over a wide range of temperatures (25–35°C) and pH (6–8). The effects of co-substrates on the degradation efficiency of acetamiprid were investigated. The results indicated that exogenously supplied glucose and ammonium chloride could slightly enhance the biodegradation efficiency, but even more addition of glucose or ammonium chloride delayed the biodegradation. In addition, one metabolic intermediate identified as N-methyl-(6-chloro-3-pyridyl)methylamine formed during the degradation of acetamiprid mediated by strain D-12 was captured by LC-MS, allowing a degradation pathway for acetamiprid to be proposed. This study suggests the bacterium could be a promising candidate for remediation of environments affected by acetamiprid.

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Section: Resultsmentioning

confidence: 99%

Microbial Degradation of Acetamiprid by Ochrobactrum sp. D-12 Isolated from Contaminated Soil

et al. 2013

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“…Cells were adjusted to OD600nm = 1.00 prior to being added to 50 mL MM-PT (1%, v/v) in a 250 mL flask [37]. Four series experiments were designed based on results from preliminary experiments.…”

Section: Tetracycline Biotransformationmentioning

confidence: 99%

Biotransformation of tetracycline by a novel bacterial strain Stenotrophomonas maltophilia DT1

Leng

Bao

Gao-feng

et al. 2016

Journal of Hazardous Materials

178

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Although several abiotic processes have been reported that can transform antibiotics, little is known about whether and how microbiological processes may degrade antibiotics in the environment. This work isolated one tetracycline degrading bacterial strain, Stenotrophomonas maltophilia strain DT1, and characterized the biotransformation of tetracycline by DT1 under various environmental conditions. The biotransformation rate was the highest when the initial pH was 9 and the reaction temperature was at 30°C, and can be described using the Michaelis-Menten model under different initial tetracycline concentrations. When additional substrate was present, the substrate that caused increased biomass resulted in a decreased biotransformation rate of tetracycline. According to disk diffusion tests, the biotransformation products of tetracycline had lower antibiotic potency than the parent compound. Six possible biotransformation products were identified, and a potential biotransformation pathway was proposed that included sequential removal of N-methyl, carbonyl, and amine function groups. Results from this study can lead to better estimation of the fate and transport of antibiotics in the environment and has the potential to be utilized in designing engineering processes to remove tetracycline from water and soil.

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“…These differences in the substrate ranges might imply that the relevant degradative pathways (or at least the initial reactions) are different in strains LW3 and the isolate S113. Luo et al (2008) isolated Brevibacterium sp. strain capable of cometabolically degrading c. 79.5% of the initially added 100 mg L À1 bensulfuron-methyl within 30 days.…”

Section: Degradation Of Chlorimuron-ethyl and Other Sulfonylureas By mentioning

confidence: 99%

Biodegradation of the sulfonylurea herbicide chlorimuron-ethyl by the strainPseudomonassp. LW3

Wang

et al. 2009

FEMS Microbiology Letters

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The chlorimuron-ethyl-degrading bacterium LW3 was isolated from contaminated soil and identified by 16S rRNA gene sequencing as Pseudomonas sp. When chlorimuron-ethyl was provided as the sole nitrogen source, the degradation efficiency in liquid medium was about 81.0% after 7 days of inoculation with strain LW3. The effects of chlorimuron-ethyl concentration and temperature on biodegradation were examined. Two metabolites of degradation were analyzed by LC/MS. Based on the identified products, strain LW3 seemed to be able to degrade chlorimuron-ethyl by cleavage of the sulfonylurea bridge. The inoculation of strain LW3 to chlorimuron-ethyl-treated soil resulted in a higher degradation rate than in uninoculated soil, regardless of the soil being sterilized or nonsterilized. This microbial culture has great potential for the bioremediation of soil contaminated with chlorimuron-ethyl.

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Co-metabolic degradation of bensulfuron-methyl in laboratory conditions

Cited by 88 publications

References 26 publications

Microbial Degradation of Acetamiprid by Ochrobactrum sp. D-12 Isolated from Contaminated Soil

Microbial Degradation of Acetamiprid by Ochrobactrum sp. D-12 Isolated from Contaminated Soil

Biotransformation of tetracycline by a novel bacterial strain Stenotrophomonas maltophilia DT1

Biodegradation of the sulfonylurea herbicide chlorimuron-ethyl by the strainPseudomonassp. LW3

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