Herbicide contamination of Mediterranean estuarine waters: Results from a MED POL pilot survey

Readman, JW; Albanis, T. A.; Barceló, Damià; Galassi, S.; Tronczyński, Jacek; Gabrielides, G.P.

doi:10.1016/0025-326x(93)90500-j

Cited by 144 publications

(45 citation statements)

References 14 publications

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“…1,2 Their massive use has noxious consequence on environment: due to the combination of chemical stability and resistance to biodegradation, together with sufficient water solubility, they can be carried by rivers, from soil to surface water, and they are capable of penetrating deep into the soil and reaching groundwater. [3][4][5][6] They are often found in drinking water too. 7,8 The triazines (atrazine, prometryn, metribuzine) are applied by spraying, so polluted waters, resulting from the rinsing of spray containers, contain significant levels of these pesticides, at concentration in the range 10-100 ppm.…”

Section: Introductionmentioning

confidence: 99%

Atrazine Toxicity Reduction Following H₂O₂/TiO₂‐Photocatalyzed Reaction and Comparison with H₂O₂‐Photolytic Reaction

Campanella

Vitaliano

2006

Annali di Chimica

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Summary -An atrazine photodegradation study carried out by a Q-Panel suntest apparatus is reported in this work. H 2 O 2 /TiO 2 photocatalyzed reaction yield and parameters (time, irradiance, temperature, H 2 O 2 (40%) volume, TiO 2 amount) were exactly determined relating to the used atrazine concentration. An experimental kinetic study was performed to establish the reaction order in fixed conditions. Using a biosensor method, 10 -4 M Atrazine solution toxicity and final photocatalytic reaction solution toxicity were quantitatively determined. A consistent toxicity decrease was observed on passing from the analyte to the products of the photocatalytic reaction. An analogous photolytic reaction carried out in absence of TiO 2 , but in the same experimental conditions of time, irradiance, temperature and H 2 O 2 volume, brings to a toxicity increase.

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Section: Introductionmentioning

confidence: 99%

Atrazine Toxicity Reduction Following H₂O₂/TiO₂‐Photocatalyzed Reaction and Comparison with H₂O₂‐Photolytic Reaction

Campanella

Vitaliano

2006

Annali di Chimica

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“…clay minerals and organic matter, and will therefore be deposited along with the adsorbed chemicals in sediment (Jones et al, 1982;Readman et al, 1993). Groundwater streams below poorly adsorptive soils which received atrazine treatment in the past need to be monitored for metabolite presence and the degradation products should be removed.…”

Section: Discussionmentioning

confidence: 99%

Soil adsorption behaviour and photomineralization by photocatalytic membranes immobilizing titanium dioxide of atrazine and intermediates

2013

Global NEST Journal

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The soil adsorption behaviour of atrazine and its photodegradation intermediate 4,6-diamino-2-chloro-1,3,5-s-triazine (I), was evaluated by measuring partition coefficients on five representative European topsoils using classical batch experiments. From this study, (I) appears to be less immobilised than atrazine itself, especially for typical agricultural soils. Consequently, (I) has a higher tendency to reach the saturated zones, and hence, the groundwater. In order to remove atrazine and its degradation products from groundwater prior to making it drinkable, photocatalytic degradation onto membranes immobilizing 30±3 wt.% TiO 2 has been investigated as a possible technology to mineralize these waters satisfactorily. For this purpose, experiments have been carried out using a pilot-plant facility, with 0.02 -0.10 mmol L -1 solutions of atrazine, as well as of compound (I) and of 2,4,6-trihydroxy-1,3,5-s-triazine (II). When employing an excess of hydrogen peroxide as the oxidizing agent, the monitoring of chemical oxygen demand (COD), as well as control by HPLC, showed that (II) was a photostable degradation product, owing to its resistance to attack by hydroxyl radicals. On the other hand, when kinetic runs were carried out onto membranes in the presence of dissolved oxygen only or of sub-stoichiometric quantities of H 2 O 2 , (II) could be quantitatively mineralized. A mechanism has been proposed, based on the possible direct involvement of holes in the irradiated semiconductor surface, together with superoxide anions, these latter being produced by the reaction of conduction band electrons with dissolved oxygen. This mechanism, which is inhibited by an excess of hydrogen peroxide, owing to its reaction yielding hydroxyl radicals by any route, is also substantiated by previous experiments, carried out in the presence of ozone, with and without photocatalytic promoters.

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“…Herbicides are potent contaminants of ground and surface water as they are transported far away from the point of application via runoff and, as a result, contaminate otherwise pristine habitats, even in remote areas where they are not used (Readman et al, 1993;Relyea 2005;Haynes et al, 2000). In addition to their persistence, mobility, and widespread contamination of water, some herbicides brought about considerable ecological damage such as the disruption of predator-prey relationships, posing a threat to the survival of major ecosystems and a loss of biodiversity (Schneider 2009).…”

Section: Relevance Of Herbicide Detection For Environmental and Healtmentioning

confidence: 99%

Computational Biology, Protein Engineering, and Biosensor Technology: a Close Cooperation for Herbicides Monitoring

Rea¹,

Polticelli²,

Antonacci³

et al. 2011

Herbicides, Theory and Applications

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Herbicide contamination of Mediterranean estuarine waters: Results from a MED POL pilot survey

Cited by 144 publications

References 14 publications

Atrazine Toxicity Reduction Following H₂O₂/TiO₂‐Photocatalyzed Reaction and Comparison with H₂O₂‐Photolytic Reaction

Atrazine Toxicity Reduction Following H₂O₂/TiO₂‐Photocatalyzed Reaction and Comparison with H₂O₂‐Photolytic Reaction

Soil adsorption behaviour and photomineralization by photocatalytic membranes immobilizing titanium dioxide of atrazine and intermediates

Computational Biology, Protein Engineering, and Biosensor Technology: a Close Cooperation for Herbicides Monitoring

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Herbicide contamination of Mediterranean estuarine waters: Results from a MED POL pilot survey

Cited by 144 publications

References 14 publications

Atrazine Toxicity Reduction Following H2O2/TiO2‐Photocatalyzed Reaction and Comparison with H2O2‐Photolytic Reaction

Atrazine Toxicity Reduction Following H2O2/TiO2‐Photocatalyzed Reaction and Comparison with H2O2‐Photolytic Reaction

Soil adsorption behaviour and photomineralization by photocatalytic membranes immobilizing titanium dioxide of atrazine and intermediates

Computational Biology, Protein Engineering, and Biosensor Technology: a Close Cooperation for Herbicides Monitoring

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Atrazine Toxicity Reduction Following H₂O₂/TiO₂‐Photocatalyzed Reaction and Comparison with H₂O₂‐Photolytic Reaction

Atrazine Toxicity Reduction Following H₂O₂/TiO₂‐Photocatalyzed Reaction and Comparison with H₂O₂‐Photolytic Reaction