Biodegradation of the herbicide diuron in soil by indigenous actinomycetes

Espósito, Elisa; Paulillo, Sara M.; Manfio, Gilson Paulo

doi:10.1016/s0045-6535(98)00069-1

Cited by 68 publications

(27 citation statements)

References 11 publications

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“…The immobilization of the pesticides on silica gel surface is an important feature to be explored due to the fact that pesticides have become an integral component of modern agricultural systems (28). Among these pesticides, diuron is a phenylurea compound, generally used for weed control on noncrop areas and in selected crops such as citrus, cotton, and pineapple and mainly in sugar cane plantations.…”

Section: Introductionmentioning

confidence: 99%

The Pesticide 3-(3,4-Dichlorophenyl)-1,1-dimethylurea (Diuron) Immobilized on Silica Gel Surface

Prado

Airoldi

2001

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

The Pesticide 3-(3,4-Dichlorophenyl)-1,1-dimethylurea (Diuron) Immobilized on Silica Gel Surface

Prado

Airoldi

2001

Journal of Colloid and Interface Science

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“…Por muito tempo os compostos organoclorados têm sido considerados como grandes responsáveis pelos problemas de contaminação ambiental, principalmente porque estes compostos são, em geral, altamente tóxicos, de difícil degradação natural e tendem a se bioacumular no meio ambiente [6][7][8][9][10] . Dioxinas e furanos clorados, por exemplo, podem ser liberados no meio ambiente em processos de combustão incompleta.…”

Section: Aspectos Ambientais Dos Compostos Organocloradosunclassified

Novas tendências para o tratamento de resíduos industriais contendo espécies organocloradas

Freire¹,

Pelegrini²,

Kubota³

et al. 2000

Quím. Nova

146

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, and mainly the low efficiency of the current remediation processes, are important aspects that have been promoted to study new degrading technologies. Among the great number of new physical and chemical alternatives, the photochemical and electrochemical processes have been played an important role, mainly due to their high degradation capacity through relatively low-cost procedures. In these contexts biological processes, the use of white-rot fungi, or even ligninolytic enzymes produced from them, are also very promising alternatives. However, the necessity of long reaction time and the high cost of the enzyme production process are some of the drawbacks that difficult the definitive consolidation of these processes.Keywords: organochloride compounds; industrial effluents; degradation processes. REVISÃO INTRODUÇÃOCom a evolução dos processos industriais e o conseqüente surgimento de inúmeros produtos que rapidamente tornaram-se de primeira necessidade, a atividade industrial adquiriu um caráter essencial na sociedade contemporânea. Embora a sua importância seja indiscutível, a atividade industrial costuma ser responsabilizada, e muitas vezes com justa razão, pelo fenô-meno de contaminação ambiental, principalmente graças a dois fatores de extrema importância: a) o acúmulo de matérias primas e insumos, que envolve sérios riscos de contaminação por transporte e disposição inadequada; e b) ineficiência dos processos de conversão, o que necessariamente implica a geração de resíduos.Embora exista uma preocupação universal em se evitar episódios de contaminação ambiental, estes eventos prejudiciais continuam acontecendo, principalmente porque, em função dos fatores acima comentados, grande parte dos processos produtivos são intrinsecamente poluentes. Ao longo das décadas, a atividade industrial tem produzido rejeitos gasosos, líquidos e sólidos nocivos ao meio ambiente. Substâncias químicas presentes na atmosfera, principalmente compostos organoclorados voláteis produzidos pelo homem, tem colocado em risco a vida na terra através da destruição da camada de ozônio. Da mesma forma, processos industriais que utilizam grandes volumes de água contribuem significativamente com a contaminação dos corpos d'água, principalmente pela ausência de sistemas de tratamento para os grandes volumes de efluentes líquidos produzidos. Dentro deste contexto, uma importante parcela do processo de contaminação pode ser atribuída às atividades das refinarias de petróleo, indústrias químicas, têxteis e papeleiras. No entanto, não menos importante é a contribuição da atividade agrícola, dos esgotos sanitários e dos resíduos domésticos.Em função deste panorama, muitos estudos têm sido realizados buscando desenvolver tecnologias capazes de minimizar o volume e a toxicidade dos efluentes industriais [1][2][3][4][5] . Infelizmente, a aplicabilidade destes tipos de sistemas está subordinada ao desenvolvimento de processos modificados e ao estabelecimento de sistemas de reciclagem de efluentes, atividades que implicam em tecnologias evolutivas e ...

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“…Shelton et al (1996) studied the ability of Streptomyces (PS1/5) to metabolize a variety of structurally different herbicides, including diuron, which was degraded by 19% after 7 days. Esposito et al (1998) found one unique strain with a good potential for diuron degradation. More recently, other authors described Arthrobacter strains which have been able to degrade diuron (Tixier et al, 2001Widehem et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…In a number of these studies, soil fungi have shown a high degradative activity against phenylureas, with occa-sional ability to degrade diuron (Weinberger and Bollag, 1972;Tillmanns et al, 1978;Vroumusia et al, 1996;Tixier et al, 2000), but only a few studies have found degradative activity in bacteria (Shelton et al, 1996;Esposito et al, 1998;Cullington and Walker, 1999;Tixier et al, 2001Tixier et al, , 2002Widehem et al, 2002). The main degradation products and pathways of diuron degradation are reviewed by Giacomazzi and Cochet (2004).…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of the herbicide diuron by streptomycetes isolated from soil

Castillo

Felis

Aragón

et al. 2006

International Biodeterioration & Biodegradation

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The diuron degrading activity of 17 streptomycete strains, obtained from agricultural and non-agricultural soils, was determined in the laboratory. All strains were identified as Streptomyces sp. by phenotypic characteristics and PCR-based assays. The strains were cultivated in liquid medium with diuron (4 mg L -1 ) at 25 1C for 15 days. Biodegradation activity was determined by high-performance liquid chromatography. The results indicated that all strains were able to degrade diuron, but to different amounts. Twelve strains degraded the herbicide by up to 50% and four of them by up to 70%. Strain A7-9, belonging to S. albidofl cluster, was the most efficient organism in the degradation of diuron, achieving 95% degradation after five days of incubation and no herbicide remained after 10 days. Overall, the strains isolated from agricultural soils exhibited higher degradation percentages and rates than those isolated from non-agricultural soils. Given the high degradation activity observed here, the streptomycete strains show a good potential for bioremediation of soils contaminated with diuron.

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Biodegradation of the herbicide diuron in soil by indigenous actinomycetes

Cited by 68 publications

References 11 publications

The Pesticide 3-(3,4-Dichlorophenyl)-1,1-dimethylurea (Diuron) Immobilized on Silica Gel Surface

The Pesticide 3-(3,4-Dichlorophenyl)-1,1-dimethylurea (Diuron) Immobilized on Silica Gel Surface

Novas tendências para o tratamento de resíduos industriais contendo espécies organocloradas

Biodegradation of the herbicide diuron by streptomycetes isolated from soil

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