Structure–toxicity relationship of chloroacetanilide herbicides: Relative impact on soil microorganisms

Saha, Supradip; Dutta, D. J.; Karmakar, Rajib; Ray, Deb Prasad

doi:10.1016/j.etap.2012.04.014

Cited by 50 publications

(38 citation statements)

References 36 publications

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“…Due to their extensive usage and to their solubility in water they have been frequently detected in soil and surface and ground waters . This is particularly worrying since chloroacetanilides toxicity has already been reported as well as their probable carcinogenicity…”

Section: Introductionmentioning

confidence: 99%

“…Due to their extensive usage and to their solubility in water they have been frequently detected in soil and surface and ground waters. [1][2][3][4][5][6] This is particularly worrying since chloroacetanilides toxicity has already been reported 7,8 as well as their probable carcinogenicity. 9,10 Since chloroacetanilide herbicides are persistent and not readily biodegradable, their degradation by physico-chemical processes has been widely investigated.…”

Section: Introductionmentioning

confidence: 99%

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Reductive dehalogenation of a chloroacetanilide herbicide in a flow electrochemical cell fitted with Ag‐modified Ni foams

Lou

Verlato

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND The aim of this work is to adapt the electrochemical reduction of Alachlor™, using Ag‐modified Ni foam electrodes to environmental applications. In this context, preparative electrolyses of Alachlor™ were performed in a flow electrochemical cell in different electrolytic media. RESULTS The highest catalytic activity for the reduction of Alachlor™ was obtained in 0.05 mol L‐1 NaOH, with a conversion yield of 93%. The dechlorination yield of Alachlor™ estimated from the Cl‐ concentration was 77%, significantly lower than its conversion yield, but higher than the yield of deschloroalachlor (69%), the main dehalogenated by‐product, indicating the presence of other by‐products. CONCLUSIONS Total reduction of Alachlor™ was achieved in conditions adapted to environmental applications, showing that this process can be used for dechlorination treatment of Alachlor™ in aqueous media. Although a high dechlorination yield was obtained, biodegradability estimated from BOD5 measurements remained low, showing that the C–Cl bond is not the only functional group that is responsible for the biorecalcitrance of Alachlor™. © 2017 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reductive dehalogenation of a chloroacetanilide herbicide in a flow electrochemical cell fitted with Ag‐modified Ni foams

Lou

Verlato

et al. 2018

J of Chemical Tech & Biotech

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“…On day 30, the activity levels of β-glucosidase were fairly similar across the analyzed treatments, but on day 60, they decreased by 13.8 % in treatments exposed to herbicide doses of 1.140 and 2.280 mg kg −1 . Saha et al ( 2012 ) observed higher levels of β-glucosidase activity in soil samples treated with alachlor, butachlor, and pretilachlor. Walia et al ( 2014 ) studied the effect of mancozeb (0-2000 ppm) on soil enzymes, viz., amylase, invertase, and phosphatase that showed adverse and disruptive effect when mancozeb used was above 10 ppm in unamended soil.…”

Section: Soil Enzymesmentioning

confidence: 80%

Interaction Between Pesticide and Soil Microorganisms and Their Degradation: A Molecular Approach

Parween

Bhandari

Jan

et al. 2016

Plant, Soil and Microbes

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“…Baćmaga et al (2014a) demonstrated a negative effect of metazachlor on the activities of dehydrogenases, catalase, urease, acid and alkaline phosphatase, arylsulphatse and b-glucosidase, and Muñoz- Leoz et al (2012) found a negative effect of tebuconazole on the b-glucosidase activity. In contrast, Saha et al (2012), testing chloroacetanilide herbicides (alachlor, butachlor and pretilachlor), observed a stimulating effect of the preparations on the bglucosidase activity. In our own studies, the b-glucosidase activity was not disturbed before a dose of P?T higher than 0.73 mg kg -1 of soil was used.…”

Section: The Activities Of Soil Enzymesmentioning

confidence: 90%

Response of microorganisms and enzymes to soil contamination with a mixture of pethoxamid terbuthylazine

et al. 2016

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This study analysed the effect of a mixture of pethoxamid (P) and terbuthylazine (T) contained in the herbicide Successor T 550 SE on organotrophic bacteria, total oligotrophic bacteria, Azotobacter and actinomycetes, oligotrophic sporulating bacteria, fungi and on the activities of dehydrogenases, catalase, urease, alkaline phosphatase, acid phosphatase, arylsulphatase and bglucosidase. The phytotoxic effect of this pesticide on maize was also determined. The study was undertaken because of a lack of data concerning the effect of a P?T mixture on soil metabolism. The previously undertaken studies concerned only the separate effect of each of these substances. The P?T mixture disturbed soil homeostasis and altered soil stability, resulting in a succession of K-strategy organotrophic bacteria. It had a negative effect on bacteria of the genus Azotobacter, oligotrophic sporulating bacteria, actinomycetes and fungi, and a positive effect on oligotrophic bacteria. P?T in doses greater than 0.73 mg kg -1 of soil resulted in a strong inhibition of dehydrogenases, catalase, urease, acid phosphatase, alkaline phosphatase, arylsulphatase and b-glucosidase, and significantly inhibited the growth and development of maize.

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Structure–toxicity relationship of chloroacetanilide herbicides: Relative impact on soil microorganisms

Cited by 50 publications

References 36 publications

Reductive dehalogenation of a chloroacetanilide herbicide in a flow electrochemical cell fitted with Ag‐modified Ni foams

Reductive dehalogenation of a chloroacetanilide herbicide in a flow electrochemical cell fitted with Ag‐modified Ni foams

Interaction Between Pesticide and Soil Microorganisms and Their Degradation: A Molecular Approach

Response of microorganisms and enzymes to soil contamination with a mixture of pethoxamid terbuthylazine

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