Mineralization of the herbicide atrazine as a carbon source by a Pseudomonas strain.
C Yanze-Kontchou,N Gschwind +1 more
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Evidence is obtained showing that strain YAYA6 has specific uptake mechanisms for atrazine but less specific degradation mechanisms for s-triazines, as shown in strain DMS 93-99.Abstract:
Strain YAYA6 was isolated from a mixed microbial community that was growing on atrazine as a sole carbon source and formed quantitative amounts of chloride and nitrate. This strain was identified as a member of the true pseudomonad group (RNA group I) and was given the designation DMS 93-99. The growth yield when atrazine was the sole carbon and nitrogen source was 80 g (dry weight) of cells per mol of atrazine, and the cell doubling time was around 11 h. Approximately 20% of [U-ring 14C]atrazine was mineralized during primary degradation of atrazine. After atrazine disappeared from the culture supernatant, mineralization continued until the level of mineralization was more than 50%. Under different experimental conditions 10% of the atrazine supplied initially was converted to cyanuric acid and < 1% was converted to other s-triazines after prolonged incubation. Degradation proceeded via dechlorination and N-dealkylation. Atrazine was degraded until the concentration was circa 0.1 milligrams/liter. We obtained evidence showing that strain YAYA6 has specific uptake mechanisms for atrazine but less specific degradation mechanisms for s-triazines.read more
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From the conventional biological wastewater treatment to hybrid processes, the evaluation of organic micropollutant removal: A review.
Camille Grandclement,Isabelle Seyssiecq,Anne Piram,Pascal Wong-Wah-Chung,Guillaume Vanot,Nicolas Tiliacos,Nicolas Roche,Pierre Doumenq +7 more
TL;DR: Even though some hybrid processes show promising micropollutant removals, further studies are needed to optimize these water treatment processes, in particular in terms of technical and economical competitiveness.
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Isolation and Characterization of a Pseudomonas sp. That Mineralizes the s-Triazine Herbicide Atrazine
TL;DR: The isolation and characterization of Pseudomonas sp.
Journal ArticleDOI
Biodegradation of atrazine by Agrobacterium radiobacter J14a and use of this strain in bioremediation of contaminated soil
TL;DR: This bacterium was used to increase the biodegradation of atrazine in soils from agricultural chemical distribution sites and it was found that the addition of 105 J14a cells g−1 into soil with a low indigenous population of atazine degraders resulted in two to five times higher mineralization than in the noninoculated soil.
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Toxicity, degradation and analysis of the herbicide atrazine
Simranjeet Singh,Vijay Kumar,Arun Chauhan,Shivika Datta,Abdul Basit Wani,Nasib Singh,Joginder Singh +6 more
TL;DR: In this paper, the toxicity, analytical techniques, abiotic degradation and microbial metabolism of atrazine are presented, as well as an eco-friendly, economically feasible and sustainable bioremediation strategy.
References
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Mineralization of the s-triazine ring of atrazine by stable bacterial mixed cultures.
TL;DR: The rate of atrazine degradation, even at the elevated concentrations used, far exceeded the rates previously reported in soils, waters, and mixed and pure cultures of bacteria.
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Biodegration of s-triazine xenobiotics
TL;DR: In this paper, the authors examined the potential for biodegradation of s-triazines as an example and with biological treatment of wastewater containing s-Triazines as the aim, but the system was not practicable because the specific enzymes were too low, because of inhibition by salt in the wastewater and because expensive carbon sources were necessary.
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Degradation of atrazine and related s‐triazines
TL;DR: The literature related to degradation of atrazine and related s‐triazines is reviewed, with particular emphasis on those substances formed along the degradative pathways and to the biodegradation aspects of mineralization.
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Degradation of atrazine by Pseudomonas: N-dealkylation and dehalogenation of atrazine and its metabolites
Ram M. Behki,Shahamat U. Khan +1 more
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Atrazine and other s-triazine herbicides in lakes and in rain in Switzerland
TL;DR: In this paper, les results of cette etude montrent que la totalite des 18 lacs suisses controles contiennent des quantites detectables de certains herbicides derives de la s-triazine.