Dependence of accelerated degradation of atrazine on soil pH in French and Canadian soils

Houot, Sabine; Topp, Edward; Yassir, Abdellah; Soulas, Guy

doi:10.1016/s0038-0717(99)00188-1

Cited by 158 publications

(174 citation statements)

References 27 publications

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“…The total CO 2 fixed by the NaOH was evaluated by titrating an aliquot (8 ml) with N/5 HCl, in the presence of BaCl 2 20% and thymolphtalein, on days 4,6,8,12,16,20,30,43,50 and 60. On each sampling date, the replacement of the CO 2 -trapping solution by fresh solution allowed air renewal in the jars.…”

Section: Evaluation Of Soil Micro-organism Activitymentioning

confidence: 99%

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Degradation of sulcotrione in a brown soil amended with various organic matters

2004

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-We investigated sulcotrione degradation in a sandy-silty brown soil. The agricultural field was divided into three small plots ten years ago, named plots R for reference, M for manure and CM for compost manure. The degradation experiment was conducted under controlled laboratory conditions using 14 C benzene uniformly ring-labelled sulcotrione. In the first month of the experiment, 80% of the residues was extractable with solvent, 55% of sulcotrione was degraded, including 45% into 2-chloro-4-methylsulfonylbenzoïc acid (CMBA), the most abundant metabolite of sulcotrione. 10% of the residues was mineralised. After two months, 40% of the residues was extractable, including 16% of sulcotrione, 25% was mineralised and 35% formed non-extractable residues. Soil amended with different organic matters favoured transformation of sulcotrione in soil. The fresh manure amendment activated mineralisation of 10%, and the compost manure amendment induced a lower ratio of extractable sulcotrione at a level of 5%.sulcotrione / degradation / persistence / soil / organic amendments / mineralisation Résumé -Dégradation de la sulcotrione dans un sol brun amendé avec différents apports organiques. La dégradation de la sulcotrione dans le sol a été évaluée en conditions de laboratoire à l'aide de la molécule uniformément marquée au 14 C sur le noyau benzénique. Le sol utilisé présente une texture limono-sableuse et est issu d'une parcelle divisée en trois sous parcelles recevant différents apports organiques depuis dix ans. Les terres issues de ces trois sous parcelles sont nommées respectivement terre R (référence), M (fumier) et CM (fumier composté). Lors du premier mois d'expérimentation 80 % des résidus restent extractibles, 55 % de la sulcotrione est dégradée dont 45 % en CMBA (2-chloro-4-methylsulfonylbenzoïc acide) son métabolite majeur. Seul 10 % des résidus sont minéralisés. Au bout de deux mois, 40 % des résidus sont extractibles au solvant dont 16 % de sulcotrione, 25 % sont minéralisés et 35 % forment des résidus non-extractibles. Lors d'amendements organiques, la transformation de la sulcotrione dans le sol est favorisée. L'apport de fumier active de 10 % la minéralisation des résidus et l'apport de fumier composté induit un ratio de sulcotrione extractible faible de l'ordre de 5 %.sulcotrione / dégradation / persistance / sol / amendement organique / minéralisation

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Section: Evaluation Of Soil Micro-organism Activitymentioning

confidence: 99%

“…Secondly, we tried to observe the stabilisation process of sulcotrione in the soil, on the one hand through the examination of the evolution of sulcotrione availability at extraction [11,12], and on the other, with the evaluation of non-extractable sulcotrione residues [6,9,18]. 30 R. Cherrier et al…”

Section: Introductionmentioning

confidence: 99%

Degradation of sulcotrione in a brown soil amended with various organic matters

2004

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“…Modificações nos valores de pH podem tornar a remediação dos herbicidas mais acelerada. No caso do herbicida atrazine, verificou-se que sua miner alização aumen tava rapidamente com o incremento do pH (Houot et al, 2000). Walker et al (1996), estudando a degradação de isoproturon, diuron e metsulfuron-metil na solução do solo e na fração adsorvida em dois tipos de solo, concluíram que a meia-vida desses produtos foi menor em solução do solo onde a ação microbiana e a radicular foram maiores.…”

Section: Introductionunclassified

Fitoestimulação por Stizolobium aterrimum como processo de remediação de solo contaminado com trifloxysulfuron-sodium

Santos

Ferreira

et al. 2007

Planta daninha

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RESUMO -Neste trabalho, objetivou-se avaliar o efeito da microbiota associada à rizosfera de mucuna-preta (Stizolobium aterrimum) na fitorremediação de um solo contaminado pelo herbicida trifloxy sulfu ron-sod ium . Os tra tam entos no esq uema fator ial 2 x 4 foram compostos por amostras de solo rizosférico de S. aterrimum cultivado por 60 dias e solo não-rizosférico ou não cultiva do, todos submetidos a qua tro níveis de con taminação pelo trifloxysulfuron-sodium (0,0, 7,5, 37,5 e 375 g ha -1 ). As amostras foram incubadas por 30 dias em recipientes apropriados para avaliação do desprendimento de dióxido de carbono (CO 2 ) pela respiração microbiana e quantificação de carbono da biomassa. Para comprovação de resultados, realizou-se o plantio de sorgo (Sorghum bicolor) nas amostras dos tratamentos, como planta indicadora da presença de resíduos do herbicida. Observou-se que o solo da rizosfera de S. aterrimum na presença do herbicida trifloxysulfuron-sodium se apresentou com maior atividade biológica, evidenciada pelo maior desprendimento de CO 2. A biomassa microbiana foi maior nas amostras de solo rizosférico, independentemente da presença do herbicida. Comprovou-se a contribuição da microbiota no processo de descontaminação do solo, pelo fato de o crescimento das plantas de sorgo em solo rizosférico ter se apresentado semelhante na ausência ou presença do trifloxysulfuron-sodium, enquanto no solo não-rizosférico o crescimento do sorgo foi inversamente proporcional à dose do herbicida.Palavras-chave: fitorremediação, descontaminação ambiental, leguminosa perene, mucuna-preta.ABSTRACT -This study aimed to evaluate the effect of microbiota associated to Stizolobium aterrimum rhizosphere on remediation of soil contaminated with trifloxysulfuron-sodium. The treatments were arranged in a factorial scheme 2x4 and consisted of samples of Stizolobium aterrimum rhizosphere soils cultivated for 60 days and non-rhizosphere or non-cultivated soil, all submitted to four contamination levels (0.0, 7.5, 37.5 and 375 g ha -1

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“…DEA = desethylatrazine; DIA = deisopropylatrazine and OH-atz = hydroxyatrazine. 298 R. Cherrier et al (1996), Rouchaud et al (1998b) and Cherrier et al (2004) for sulcotrione, and Kaufman et al (1970) and Houot et al (2000) for the atrazine, explained the high contents of both products and their metabolites for 20 days after treatment and the decrease between days 20 and 65 after treatment (Tabs. I, II, Figs.…”

Section: Evolution Of Non-extractable Residues In Soilsmentioning

confidence: 99%

“…Complete and rapid mineralisation of the 14 Clabelled s-triazine ring, both by soil populations and by bacterial isolates, is now commonly observed (Assaf and Turco, 1994;Barriuso and Houot, 1996). Major metabolites under all conditions are desethylatrazine, deisopropylatrazine and hydroxyatrazine (Houot et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Comparison of the leaching behaviour of two maize herbicides: atrazine and sulcotrione

Cherrier

Boivin

Perrin-Ganier

et al. 2005

Agron. Sustain. Dev.

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-In a soil column experiment under outdoor conditions, we monitored the fate of 14 C-ring-labelled sulcotrione and atrazine in water percolates and in the ploughed horizon of a sandy-silty soil. The application rates were 1000 and 450 g·ha -1 , respectively, for atrazine and sulcotrione. Two months after treatment, the cumulative amounts of herbicide residues leached from the soil were 14.5% and 7% of the applied radioactivity for sulcotrione and atrazine, respectively. The maximum percolate concentrations for each herbicide were observed during the first month following application; 120 µg·L -1 and 95 µg·L -1 for sulcotrione and atrazine, respectively. After 2 weeks, 78% of the sulcotrione and atrazine was extractable from the soil, whereas after two months only 10% and 4%, respectively, could be extracted. The maximum sulcotrione and atrazine contents in the first ten centimetres of soil were identical. For both molecules, the content of non-extractable residues was low, being around 15%. The sulcotrione seems to be a more mobile product than the atrazine. Even if much smaller leachate concentrations would be expected to impact groundwater than those found in this study, the classification of the molecules would stay the same. soil columns / pesticide fate / bound residues / soil and water pollution

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Dependence of accelerated degradation of atrazine on soil pH in French and Canadian soils

Cited by 158 publications

References 27 publications

Degradation of sulcotrione in a brown soil amended with various organic matters

Degradation of sulcotrione in a brown soil amended with various organic matters

Fitoestimulação por Stizolobium aterrimum como processo de remediação de solo contaminado com trifloxysulfuron-sodium

Comparison of the leaching behaviour of two maize herbicides: atrazine and sulcotrione

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