Fungal bioconversion of 2,4-dichlorophenoxyacetic acid (2,4-D) and 2,4-dichlorophenol (2,4-DCP)

Vroumsia, Toua; Steiman, R.; Seigle‐Murandi, F.; Benoit‐Guyod, Jean‐Louis

doi:10.1016/j.chemosphere.2004.11.102

Cited by 62 publications

(45 citation statements)

References 36 publications

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“…Once more, the kinetic scheme corresponding to the 24 stages of reaction can be assembled (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18) that describe the decomposition of ozone to include the generation of hydroxyl radicals, and 21-26 corresponding to the interaction of 2,4-D, 2,4-DCP and 2-CHQ with molecular ozone and OH radicals, respectively) and solve the corresponding mass balances for the species involved.…”

Section: Reaction Scheme and Interpretation Of The Resultsmentioning

confidence: 99%

Reaction Kinetic Model for 2,4-Dichlorophenoxyacetic Acid Decomposition in Aqueous Media Including Direct Photolysis, Direct Ozonation, Ultraviolet C, and pH Enhancement

Gilliard

Martín

Cassano

et al. 2013

Ind. Eng. Chem. Res.

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This report presents a comprehensive study of the degradation kinetics of herbicide 2,4-D using ozone with and without intensification with UVC radiation. The by-products cause several seriesparallel reactions that compete with the process of photon absorption when radiation is applied.Five processes were analyzed separately: (i) the direct photolysis of 2,4-D and its main byproducts, (ii) direct ozonation in the absence of hydroxyl radicals using tert-butanol as radical scavenger, (iii) the oxidation when ozone reacts in parallel with hydroxyl radicals, (iv) the reaction enhanced with UVC radiation and (v) the oxidation improved by pH modifications.A kinetic model was developed based on the main reaction by-products. The corresponding parameters of the reacting system were determined (9 of its 29 kinetic constants were previously unknown).Simulation results, including a rigorous description of the reacting system and the radiation field (having dark and illuminated volumes) agree very well with the experimental data.

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Section: Reaction Scheme and Interpretation Of The Resultsmentioning

confidence: 99%

Reaction Kinetic Model for 2,4-Dichlorophenoxyacetic Acid Decomposition in Aqueous Media Including Direct Photolysis, Direct Ozonation, Ultraviolet C, and pH Enhancement

Gilliard

Martín

Cassano

et al. 2013

Ind. Eng. Chem. Res.

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“…have been reported to degrade 2,4-dichlorophenol 10) , 2,4-dichlorophenoxyacetic acid 16) , PCNB 9) and isoproturon.…”

Section: Discussionmentioning

confidence: 99%

A new endosulfan-degrading fungus, Mortierella species, isolated from a soil contaminated with organochlorine pesticides

2010

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Two new aerobic endosulfan-degrading fungal strains, Mortierella sp. strains W8 and Cm1-45, were isolated from soil contaminated with organochlorine pesticides. This is the first report on the biodegradation of endosulfan by Zygomycota. The strains isolated in this work degraded more than 70% and 50% of a and b-endosulfan, respectively, over 28 days at 25°C, whereas 8.2 mM of each a and b-endosulfan was added as the initial concentration in liquid cultures. Only a small amount of endosulfan sulfate, a persistent metabolite, was detected in both cultures, while these strains could not degrade endosulfan sulfate when incubated with endosulfan sulfate as the initial substrate. Both strains generate endosulfan diol as a first step in the degradation of endosulfan and then undergo further conversion to endosulfan lactone. The formation of these intermediates was confirmed by GC-MS. Mortierella spp. might be present as hyphae in contaminated soil because they were isolated using the soil washing method; therefore, these Mortierella spp. strains have potential for the bioremediation of contaminated sites with endosulfan. © Pesticide Science Society of Japan Keywords: bioremediation, endosulfan, endosulfan diol, endosulfan sulfate, Mortierella.* To whom correspondence should be addressed. E-mail: ktakagi@niaes.affrc.go.jp Published online July 15, 2010 © Pesticide Science Society of Japan J. Pestic. Sci., 35(3), 326-332 (2010326-332 ( ) DOI: 10.1584 Original ArticleMaterials and Methods SoilsFour soil samples were used for the isolation of endosulfandegrading fungi. Three soil samples were collected from different agricultural sites (two in Kagoshima prefecture, one in Ehime prefecture) having a history of repeated endosulfan application until 2007 and 1990, respectively. One soil sample was collected from an old factory site (Niigata prefecture) contaminated with persistent organic pollutants (DDTs and HCHs). The basic properties of the four soils were determined and are shown in Table 1. Endosulfan was not detected from all soil samples, but endosulfan sulfate had accumulated in soils A and B at concentrations of 1.0 mg/kg (dry weight) and 0.53 mg/kg (dry weight), respectively. a-endosulfan (6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4,3-benzodioxathiepin 3-oxide) (97% purity), b-endosulfan (6,7,8,9,10,10-hexachloro-1,5,5a,6,9, 9a-hexahydro-6,9-methano-2,4,3-benzodioxathiepin 3-oxide) (97% purity), and endosulfan sulfate (6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4,3-benzodioxathiepin 3,3-dioxide) (98% purity) were purchased from Wako Pure Chemical Industries (Osaka, Japan), and endosulfan diol (1,4,5,6,7,7-hexachlorobicyclo[2.2.1]hept-5-ene-2,3-dimethanol) (98% purity), endosulfan ether (4,5,6,7,8,8-hexachloro-1,3,3a,4,7,7a-hexahydro-4,7-methanoisobenzofuran) (99% purity), and endosulfan lactone (4,5,6,7,8,8-hexachloro-4,7-methano1,3,3a,4,7,7a-hexahydroisobenzofuran-1-one) (98.5% purity) were purchased from Dr. Ehrenstorfer GmbH (Augsburg, Germany). Chemicals Microorgani...

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“…Castillo et al (2001) found similar effects of wheat straw addition on fungal degradation of MCPA, with an increase in two lignin-degrading enzymes (lignin peroxidase and manganese peroxidase/ laccase) coinciding with MCPA removal. Out of 90 fungal strains tested for their ability to degrade 2,4-D, one of the best-performing fungi was Mortierellaceae (Vroumsia et al 2005). This fungal species was also found by Poll et al (2010b) to be the dominant fungus during the initial phase of litter degradation, and it points to the possibility that early fungal litter degraders were also involved in MCPA degradation in our experiment.…”

Section: Mcpa-degrading Communitymentioning

confidence: 87%

“…Unlike bacterial degradation of phenoxy acids, which is well known, the degradation of the herbicide by soil fungi has received less attention. Vroumsia et al (2005) screened 90 fungal species belonging to ten taxonomic groups for their potential to degrade 2,4-D. Two of the species attained a dissipation potential of about 50 % within 5 days.…”

Section: Introductionmentioning

confidence: 99%

Evidence for the importance of litter as a co-substrate for MCPA dissipation in an agricultural soil

Saleh

Pagel

Enowashu

et al. 2015

Environ Sci Pollut Res

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Environmental controls of 2-methyl-4-chlorophenoxyacetic acid (MCPA) degradation are poorly understood. We investigated whether microbial MCPA degraders are stimulated by (maize) litter and whether this process depends on concentrations of MCPA and litter. In a microcosm experiment, different amounts of litter (0, 10 and 20 g kg(-1)) were added to soils exposed to three levels of the herbicide (0, 5 and 30 mg kg(-1)). The treated soils were incubated at 20 °C for 6 weeks, and samples were taken after 1, 3 and 6 weeks of incubation. In soils with 5 mg kg(-1) MCPA, about 50 % of the MCPA was dissipated within 1 week of the incubation. Almost complete dissipation of the herbicide had occurred by the end of the incubation with no differences between the three litter amendments. At the higher concentration (30 mg kg(-1)), MCPA endured longer in the soil, with only 31 % of the initial amount being removed at the end of the experiment in the absence of litter. Litter addition greatly increased the dissipation rate with 70 and 80 % of the herbicide being dissipated in the 10 and 20 g kg(-1) litter treatments, respectively. Signs of toxic effects of MCPA on soil bacteria were observed from related phospholipid fatty acid (PLFA) analyses, while fungi showed higher tolerance to the increased MCPA levels. The abundance of bacterial tfdA genes in soil increased with the co-occurrence of litter and high MCPA concentration, indicating the importance of substrate availability in fostering MCPA-degrading bacteria and thereby improving the potential for removal of MCPA in the environment.

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Fungal bioconversion of 2,4-dichlorophenoxyacetic acid (2,4-D) and 2,4-dichlorophenol (2,4-DCP)

Cited by 62 publications

References 36 publications

Reaction Kinetic Model for 2,4-Dichlorophenoxyacetic Acid Decomposition in Aqueous Media Including Direct Photolysis, Direct Ozonation, Ultraviolet C, and pH Enhancement

Reaction Kinetic Model for 2,4-Dichlorophenoxyacetic Acid Decomposition in Aqueous Media Including Direct Photolysis, Direct Ozonation, Ultraviolet C, and pH Enhancement

A new endosulfan-degrading fungus, Mortierella species, isolated from a soil contaminated with organochlorine pesticides

Evidence for the importance of litter as a co-substrate for MCPA dissipation in an agricultural soil

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