Pesticides in Portuguese surface and ground waters

Cerejeira, Maria José; Viana, Paula; Batista, Sofia; Pereira, Teresa; Silva, Emanuella Soares da; Valerio, Marina; Silva, A; Ferreira, Maria Teresa; Silva‐Fernandes, A.

doi:10.1016/s0043-1354(01)00462-6

Cited by 389 publications

(178 citation statements)

References 6 publications

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“…MCPA, a systemic herbicide used for the post-emergence control of broad-leaf weeds (Tomlin, 1994), is such an example of an agricultural pesticide that is commonly found in waters and soil (Silva et al, 2006;Köck et al, 2010;Botta et al, 2012;Matamoros et al, 2012a). The risks of leaching from soil into ground and surface water are significant, due to the relatively high water solubility (825 mg L −1 ) and mobility, and a persistence in the environment of several weeks (Laganá et al, 2002;Cerejeira et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Constructed wetlands with light expanded clay aggregates for agricultural wastewater treatment

Dordio

Carvalho

2013

Science of The Total Environment

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. H I G H L I G H T S• CW with LECA substrate and Phragmites plants tested with agricultural wastewaters.• High removals of TSS, COD, NH 4 -N, polyphenols, a pharmaceutical and a pesticide.• Contact time of wastewaters with beds ranged from 3 to 9days in batch conditions.• Promising results suggest more studies in full-scale and more realistic conditions. Constructed wetlands (CWs) are receiving a renewed attention as a viable phytotechnology for treating agricultural wastewaters and for the removal of more specific pollutants, in particular recalcitrant ones. In this work, the performance of CW mesocosms using light expanded clay aggregates (LECA) as the bed's substrate and planted with Phragmites australis was investigated for treatment of olive mill wastewater (OMW), swine wastewater (SW) contaminated with oxytetracycline and water contaminated with herbicide MCPA (2-methyl-4-chlorophenoxyacetic acid). Both wastewaters (OMW and SW) initially presented high organic matter content and total suspended solids which were removed by the system with efficiencies higher than 80%. Removal of polyphenols in OMW and nitrogen compounds in SW also showed similar or higher efficiencies in comparison with other treatment systems reported in the literature. The antibiotic oxytetracycline was completely removed from SW within the assay period in unplanted LECA beds, but planted beds allowed a significantly faster removal. In regard to water contaminated with MCPA, the results showed that LECA has a large sorption capacity for this herbicide (removal efficiencies of 56-97%). In general, considerably higher pollutant removal efficiencies were obtained when plants were used (up to 28% higher). The results obtained are indicative that CWs with LECA as substrate may be an adequate option for agricultural wastewater treatment. a b s t r a c t a r t i c l e i n f o

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Section: Introductionmentioning

confidence: 99%

Constructed wetlands with light expanded clay aggregates for agricultural wastewater treatment

Dordio

Carvalho

2013

Science of The Total Environment

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“…Although extensive studies to evaluate the potential carcinogenicity of bentazone indicated the absence of significant tumor increase when chronic and high doses were administered to rats and mice, the concern for human health is still very high. Its low adsorption and high water solubility make bentazone one of the most commonly detected pollutants in the surface waters and groundwaters of Portugal and other European countries [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Determination of the Herbicide Bentazone Using a Carbon Nanotube β‐Cyclodextrin Modified Electrode

et al. 2013

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An electrochemical sensor has been developed for the determination of the herbicide bentazone, based on a GC electrode modified by a combination of multiwalled carbon nanotubes (MWCNT) with b-cyclodextrin (b-CD) incorporated in a polyaniline film. The results indicate that the b-CD/MWCNT modified GC electrode exhibits efficient electrocatalytic oxidation of bentazone with high sensitivity and stability. A cyclic voltammetric method to determine bentazone in phosphate buffer solution at pH 6.0, was developed, without any previous extraction, clean-up, or derivatization steps, in the range of 10-80 mmol L À1 , with a detection limit of 1.6 mmol L À1 in water. The results were compared with those obtained by an established HPLC technique. No statistically significant differences being found between both methods.

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“…2002;GIBSON & KOIFMAN, 2008). Nos Estados Unidos e na Europa, a ATZ tem sido encontrada em mananciais em concentrações variando de 2,9 a 89,0 μg.L -1 (CEREJEIRA et al, 2003;BAKER;SPETH, 1989 …”

Section: Introductionunclassified

Emprego do carvão ativado para remoção de atrazina em água de abastecimento público

Coelho¹,

Vazzoler

Leal

2012

Eng. Sanit. Ambient.

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ResumoA atrazina é um dos herbicidas mais utilizados no mundo, sendo encontrada em águas superficiais e subterrâneas. Pertence à classe das s-triazinas, possui potencial carcinogênico e apresenta toxicidade como disruptor endócrino. A reconhecida limitação dos processos de tratamento de água, os quais empregam a coagulação química na remoção da atrazina e os efeitos na saúde, motivou este trabalho, considerando a adsorção em carvão ativado como tecnologia alternativa. O estudo experimental consistiu na caracterização física do carvão ativado e nos ensaios de adsorção em águas de diferentes conteúdos orgânicos. Foi possível verificar a capacidade do carvão ativado em remover atrazina, e o mecanismo de adsorção foi influenciado pela variação da qualidade das matrizes de água gerando isotermas com características distintas.Palavras-chave: atrazina; carvão ativado; isotermas de adsorção; matéria orgânica natural. AbstractAtrazine is one of the most widely herbicides used in the world, being found in surface water and groundwater. It belongs to the s-triazines class classified as possible carcinogenic potential and toxicity presents as an endocrine disruptor. The acknowledged limitation of the water treatment processes, which employ chemical coagulation in atrazine removal and the risks to health, has motivated this work taking into regards the adsorption of activated carbon as an alternative technology. The experimental study consisted of physical characterization of activated carbon and of adsorption tests in waters of different organic content.It was possible to verify the capacity of activated carbon to remove atrazine, and the adsorption mechanism was influenced by the quality variation of water matrices generating isotherms with different characteristics.Keywords: atrazine; activated carbon; adsorption isotherms; natural organic matter.Endereço para correspondência: Edumar Ramos Cabral Coelho -Rua Alvim Borges da Silva, 168 -Jardim Camburí -29090-300 -E-mail: edumar@ct.ufes.br Recebido: 09/09/11 -Aceito: 28/01/13 -Reg. ABES: 39 IntroduçãoA aplicação de agrotóxicos na agricultura tem gerado grandes complicações ambientais como, por exemplo, a contaminação de mananciais destinados ao abastecimento público. Quando acumulados no corpo humano, mesmo em doses relativamente pequenas, os agrotóxicos podem produzir sérios efeitos sobre a saúde. Sendo assim, a produção de água potável requer o uso de tecnologias que proporcionem diminuição de matéria orgâ-nica e microcontaminantes para enquadramento ao padrão de potabilidade.A atrazina (ATZ) é um dos herbicidas mais utilizados no mundo e é caracterizada por sua abrangente aplicação, alta persistência em diferentes ambientes aquáticos, capacidade de produzir efeitos nos sistemas neuroendócrino e reprodutivo, além de ser classificada como de potencial carcinogênico (FRIEDMANN,

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Pesticides in Portuguese surface and ground waters

Cited by 389 publications

References 6 publications

Constructed wetlands with light expanded clay aggregates for agricultural wastewater treatment

Constructed wetlands with light expanded clay aggregates for agricultural wastewater treatment

Electrochemical Determination of the Herbicide Bentazone Using a Carbon Nanotube β‐Cyclodextrin Modified Electrode

Emprego do carvão ativado para remoção de atrazina em água de abastecimento público

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