Pesticides and nitrates in groundwater from oriziculture areas of the ‘Baixo Sado’ region (Portugal)

Silva, Emília; Batista, Sofia; Viana, Paula; Antunes, Pedro; Serôdio, Leonor; Cardoso, Ana Teresa; Cerejeira, Maria José

doi:10.1080/03067310600833336

Cited by 48 publications

(25 citation statements)

References 18 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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“…However, increasing interest in this topic in recent years, as well as the improvement in the methods of analysis, has produced more information about the quality of groundwater. In recent years several monitoring programmes have been applied in the USA [2][3][4][5][6][7] and in many European countries [8][9][10][11][12][13][14][15] to determine a large variety of pesticides and some transformation products (TPs) in groundwater. Although some data are available on pesticide residues in Spanish groundwater [16][17][18][19][20], there is a lack of monitoring programmes of sufficient scope to focus on the compounds that are most widely applied and, consequently, with the highest potential to contaminate groundwater.…”

Section: Introductionmentioning

confidence: 99%

Pesticide residues and transformation products in groundwater from a Spanish agricultural region on the Mediterranean Coast

Hernández

Marín

Pozo

et al. 2008

International Journal of Environmental Analytical Chemistry

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An overview is given on the presence and changes over time of pesticide residues in groundwater from the Valencia region, one of the most important citrus cultivation sites of southern Europe. A multiresidue LC-MS/MS method was applied for the screening of around 50 pesticides in 75 water samples collected during 2000. The herbicides simazine, terbuthylazine, bromacil, terbumeton, and diuron were the most frequently detected compounds. On the basis of compounds detected in these samples, another method that focused on 30 herbicides and relevant transformation products (TPs) was developed and applied to around 80 water samples collected during 2003. Simazine was the most frequently found compound followed by several triazine metabolites. Data for this paper show the vulnerability of groundwater in this area to herbicide applications and illustrate the importance of including pesticide TPs in environmental monitoring programmes, as four out of the five compounds most frequently detected were pesticide TPs.

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“…In a recent review about the ecological status of agricultural systems across the European Union, Stoate et al (2009) reported to various studies about the presence of herbicide contamination, some exceeding the 0.1 μg.L -1 EU limit, in both surface waters and groundwaters in areas occupied by intensive agriculture, rice fields included. Silva et al (2006) detected residues of chlorfenvinphos, cycloxydim, 3,4-dichloroaniline, MCPA, molinate, oxidiazon, profoxydim, and propanil in 62% of 171 water samples collected from 22 groundwater wells used for public supply, domestic supply, and irrigation purposes in oriziculture areas of "Baixo Sado" region. In this study, 6% of total samples presented maximum concentration levels of at least one of the compounds above 0.1 μg.L -1 and molinate was the most frequently detected (55%), particularly with maximum concentration levels above the maximum limit.…”

Section: Environmental Exposure and Contaminationmentioning

confidence: 99%

“…In Spain, rice cultivation is scattered in several areas such as the Aragon area, the Guadalquivir valley, the Ebro delta and Valencia Albufera (Ferrero & Tinarelli, 2007). In Portugal, the approximately 25 000 ha of rice cultivation area is concentrated mainly in three regions: the Tagus and Sorraia valleys (10 000 ha), the Mondego (8000 ha), and the Sado and Caia (7000 ha) river valleys (Calha et al, 1999;Silva et al, 2006). In all European countries rice is cultivated in permanent flooded conditions, with short periods during which soil is dried to favour rice rooting (in the early stages) or weed control treatments.…”

Section: Herbicide Effects On Non-target Cyanobacteria: the Case Studmentioning

confidence: 99%

Impact of Herbicides on Non-Target Organisms in Sustainable Irrigated Rice Production Systems: State of Knowledge and Future Prospects

Galhano¹,

Gomes²,

Eduardo³

et al. 2011

Herbicides and Environment

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Pesticides and nitrates in groundwater from oriziculture areas of the ‘Baixo Sado’ region (Portugal)

Cited by 48 publications

References 18 publications

Constructed wetlands with light expanded clay aggregates for agricultural wastewater treatment

Constructed wetlands with light expanded clay aggregates for agricultural wastewater treatment

Pesticide residues and transformation products in groundwater from a Spanish agricultural region on the Mediterranean Coast

Impact of Herbicides on Non-Target Organisms in Sustainable Irrigated Rice Production Systems: State of Knowledge and Future Prospects

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