A ‘three in one’ complexing agent enables copper desorption from polluted soil, its removal from groundwater and its detection

Pensini, Erica; Laredo, Thamara; Earnden, Laura; Marangoni, Alejandro G.; Ghazani, Saeed M.

doi:10.1016/j.colsurfa.2021.126840

Cited by 12 publications

(4 citation statements)

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“…Importantly, the hydrophilic head also plays a key role in surfactant binding to metal surfaces. Our recently published studies showed that SLL could bind copper or iron ions to create hydrophobic oil‐soluble complexes, dissimilar to SDS or SCG (Earnden et al, 2021; Pensini et al, 2021). These results suggest that SLL could bind iron at the carbon steel surfaces and hydrophobize them more effectively than either SDS or SCG, as hypothesized above.…”

Section: Resultsmentioning

confidence: 99%

“…As highlighted above, SLL and SCG are environmentally benign and commercially available surfactants. SLL was selected because our previously published study showed that it could bind Cu 2+ ions, suggesting that it had the potential to bind to metal surfaces (Pensini et al, 2021). While our study shows that SLL can bind metal ions, it was not previously used to inhibit the corrosion of metal surfaces (e.g., carbon steel).…”

Section: Introductionmentioning

confidence: 99%

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Comparative study of corrosion inhibition by three anionic surfactants in an acidic environment

Earnden

Zalm

Chen

et al. 2021

J Surfact & Detergents

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Corrosion in carbon steel units of chemical, petrochemical and oil and gas plants poses safety and economic concerns. The goal of our study is to investigate the corrosion inhibition effectiveness of an environmentally benign surfactant, namely sodium lauroyl lactylate (SLL), in comparison to sodium cocoyl glutamate (SCG) and sodium dodecyl sulfate (SDS). The corrosion of carbon steel in 1 M HCl was markedly inhibited by 0.05 and 0.1 M of the anionic surfactant SLL, as determined from weight loss over 96 h, at ambient conditions. X-ray photoelectron spectroscopy (XPS) showed that SLL adsorbed at the carbon steel surface, forming a protective film that decreased corrosion. Scanning electron microscopy (SEM) showed that carbon steel surfaces immersed in 1 M HCl for 96 h had an etched appearance without SLL, whereas they retained their smoothness with 0.1 M SLL. Electrochemical impedance spectroscopy (EIS) measurements confirmed that SLL passivated carbon steel surfaces, markedly increasing the polarization resistance R p from ≈95 to ≈20,694 Ω cm 2 over a 12 h period. In contrast, without SLL, R p decreased from ≈92 to ≈12 Ω cm 2 . These results demonstrate for the first time that the environmentally friendly surfactant SLL is an efficient corrosion inhibitor in extreme environments such as 1 M HCl solutions. Dissimilar to SLL, SCG and SDS were not effective in inhibiting corrosion.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative study of corrosion inhibition by three anionic surfactants in an acidic environment

Earnden

Zalm

Chen

et al. 2021

J Surfact & Detergents

Self Cite

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“…Therefore, the continued use of these kinds of products in viticulture has triggered the accumulation of this metal in several vineyard area soils around Europe and worldwide (Ballabio et al, 2018;MacKie et al, 2012;Rusjan et al, 2007) which may even affect the productivity of food crops (Adrees et al, 2015). Although Cu is fixed by organic and clayey matter content in the soil, Sonoda et al(2019) observed copper mobility due to organic matter degradation (Pensini et al, 2021), suggesting possible groundwater contamination. The high potential ecotoxicity of copper in freshwater (Peña et al, 2018) and its accumulation in European soils have raised concerns in the European Union, leading to a tightening of the legislation on the use of copper-based products, limiting the use to 28 kg/ha of copper for seven years (Commission Implementing Regulation EU 2018/1981).…”

Section: Introductionmentioning

confidence: 97%

“…However, even each its extended use, copper has a major disadvantage: as it is a metal, it does not degrade. This means that copper accumulates in the soil (Fan et al, 2011;Wightwick et al, 2008) and can potentially contaminate surface and groundwater, and of course affect to living organisms that inhabit them (Malhotra et al, 2020;Peña et al, 2018;Pensini et al, 2021). Although it is also a micronutrient that can be taken up by the plants (V. , the amount needed is extremely reduced compared to that used for crop protection purposes.…”

Section: Introductionmentioning

confidence: 99%

Assessment of different strategies to reduce environmental fungicide contamination in vineyards

Ortega Rioja

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(English) The use of plant protection products (PPP) has become an essential tool in agriculture to achieve the minimum requirements of quality and quantity of food demanded by consumers. Moreover, due to its repeated use throughout the campaign, it is one of the most complex strategies in agriculture, due to the concern for achieving products free of pests and diseases, free of residues, and avoiding environmental risks. The recently published Farm to Fork Strategy aims at the difficult task of reducing the amount of hazardous pesticides used by 50 % by 2030. From the moment this strategy was published, it gained importance the implementation of improvements in application techniques to increase the effectiveness and efficiency of treatments. This is especially relevant in specialty crops such as orchards or vineyards, where the use of PPP is very high, compared with the case of field crops. In addition, this type of crops is characterised by a high degree of spatial variability in terms of the canopy structural characteristics, which makes it difficult to achieve a safe and effective application of pesticides. In this sense, variable rate application technology can reduce the effect of intra-plot variability, adjusting the volume rate to the canopy characteristics at each point, achieving a much more rational distribution of the plant protection product and more adjusted to the canopy than those carried out homogeneously. Currently, three types of variable rate application technology are known: 1) based on real-time sensors, 2) based on prescription maps, and 3) a combination of the two previous ones. Although variable rate application systems based on real-time sensors eliminate the need for prior knowledge of the crop, this technology has not been practically implemented in the viticulture sector. This contrasts with the adoption of vegetation maps acquired using remote sensing, which has been in commercial use for vineyard management for more than ten years. Among the management operations in which vegetation maps can have a greater impact is that of plant protection application, which is currently at an incipient level of implementation. For this reason, the main objective of this doctoral thesis, structured in three research publications, is to adapt and incorporate variable application technologies based on prescription maps to improve the efficacy and efficiency of treatments in the vineyard. The first research publication of the thesis was focused on the design, fine-tuning and field validation of a prototype of variable rate application based on prescription maps for vineyards. The article includes the whole process of variable map-based spraying, from the creation of the prescription map to obtaining the actual application map. The obtained results showed the possibility of saving up to 47.3 % of the amount of PPP concerning conventional treatment, demonstrating that it is possible to adapt, with the corresponding changes and adjustments, the available technology to the specific case of the vineyard. The main objective of the second research publication was the evaluation of the quality of the distribution of PPP on the vines and the evaluation of the biological efficacy of the applications during a complete campaign of treatments. During the research, the degree of adoption of the variable rate application system on a commercial farm and the possibility of implementing the technology in its annual treatment program were evaluated. A total of 28 treatments were carried out using the map based variable rate technology, obtaining in all treatments and vigour zones a coverage between 20 and 40 %, considered adequate values to guarantee pest/disease control in any spraying process. In terms of biological efficacy, the same levels of control were maintained as in the conventional treatments, and no significant differences were found between them. Although it was demonstrated that the variable rate application system allowed. (Español) El cultivo de la vid tiene una rica historia en la región europea. Para garantizar su producción, se ha confiado tradicionalmente en el uso de productos fitosanitarios (PPP) para el control de plagas y enfermedades. Uno de los mayores retos a los que se enfrenta el viñedo es Plasmopara viticola, comúnmente conocido como mildiu. Tradicionalmente, para combatir esta enfermedad se han utilizado fungicidas a base de cobre. Aunque hoy en día también existen productos de síntesis química y de origen biológico, el cobre sigue siendo la opción más utilizada. Sin embargo, se ha observado que su uso prolongado puede causar contaminación ambiental, especialmente en el suelo y las aguas. Por ello, el uso de productos fitosanitarios en la agricultura es actualmente motivo de gran preocupación debido a los riesgos que plantean tanto para el medio ambiente como para la salud humana. Su uso prolongado y, en ocasiones, abusivo o descuidado, ha hecho saltar las alarmas en la Unión Europea. Este proyecto de investigación doctoral se ha centrado en la búsqueda de soluciones alternativas para reducir la contaminación causada por fungicidas en la vid desde diferentes ángulos, desde la mitigación hasta la prevención. En primer lugar, la tesis doctoral explora el impacto de los cultivos de cobertura en la reducción de la lixiviación de plaguicidas a las aguas subterráneas y el papel de las franjas de protección vegetadas en la reducción de la escorrentía a los cursos de agua superficiales. En segundo lugar, evalúa el potencial de la vegetación para degradar estos productos en distintos medios edáficos, incluidos sus productos de transformación. En tercer lugar, este trabajo implica el desarrollo y la evaluación de un producto microencapsulado de cobre que mejora la deposición y, por tanto, reduce la cantidad de cobre necesaria en los tratamientos fitosanitarios. Por último, en la cuarta fase, se evalúan los factores que influyen en la adopción por parte de los agricultores de los biopesticidas como producto alternativo a los fungicidas de cobre. Este trabajo demuestra que las tres alternativas propuestas se han mostrado como estrategias potenciales para reducir la contaminación. Los hallazgos presentados en esta tesis demuestran resultados prometedores. Los cultivos de cobertura y las bandas de vegetación son estrategias eficaces para reducir la contaminación de las aguas subterráneas y del suelo resultante de la aplicación de fungicidas, debido a su capacidad para degradar los compuestos contaminantes. La vegetación acelera la cinética de degradación de los fungicidas en el suelo y de sus productos de transformación. El producto microencapsulado evaluado, permite aumentar la eficacia durante la aplicación en pulverización, generando una reducción potencial de cobre. Asimismo, se ha detectado que el conocimiento de la legislación del cobre es crucial para la introducción de productos fitosanitarios biológicos como alternativa a los fungicidas químicos o de cobre. Todas estas estrategias pueden combinarse para lograr un impacto aún mayor en diferentes niveles de actividades de aplicación de pulverización. Es necesario seguir investigando para lograr el menor impacto ambiental y producir alimentos más seguros de forma más sostenible.

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Alginate-Bentonite Clay Composite Porous Sorbents for Cu(II) and Zn(II) Removal from Water

Hood

Pensini

2022

Water Air Soil Pollut

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A ‘three in one’ complexing agent enables copper desorption from polluted soil, its removal from groundwater and its detection

Cited by 12 publications

References 44 publications

Comparative study of corrosion inhibition by three anionic surfactants in an acidic environment

Comparative study of corrosion inhibition by three anionic surfactants in an acidic environment

Assessment of different strategies to reduce environmental fungicide contamination in vineyards

Alginate-Bentonite Clay Composite Porous Sorbents for Cu(II) and Zn(II) Removal from Water

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