Pairing micropollutants and clay-composite sorbents for efficient water treatment: Filtration and modeling at a pilot scale

Lelario, Filomena; Gardi, Ido; Mishael, Yael G.; Dolev, Noam; Undabeytia, Tomás; Nir, Shlomo; Scrano, Laura; Bufo, Sabino Aurelio

doi:10.1016/j.clay.2016.12.029

Cited by 19 publications

(8 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We suggest that the mentioned effect might be due to the activity of free cations which are released from the complex according to a mode of dynamic adsorption, which includes events of adsorption and desorption. We note that removal of perchlorate [71] and sulfentrazone [78] from water was much more efficient by the use of a complex based on ODTMA, rather than by a complex based on BDMHDA. In the case of BDMHDA the released cations could form dimers or oligomers with the pollutant molecules, which were not retained in the filter.…”

Section: (C) Role Of Released Cations During Filtrationmentioning

confidence: 89%

“…Lelario et al [78] studied removal of sulfentrazone using micelle-clay granulated composites. One of the aims of this study was to compare the efficiency of removal of this anionic herbicide by BDMHDA-, or ODTMA-clay.…”

Section: Removal Of Pollutants From Water 331 Removal Of Herbicidementioning

confidence: 99%

“…For an initial solution including 10 µg L −1 which has to be purified to 0.1 µg L −1 the estimates are 18 to 30 m 3 kg −1 . For the criterion in [78] the capacity to purify a solution of 1 µg L −1 to 0.5 µg L −1 yielded for the liposome-clay based on DDAB a capacity of 39 m 3 kg −1 . For purification of a solution of diclofenac 1 µg L −1 to 0.5 µg L −1 a recent calculation based on the granulated ODTMA-clay yielded a value of 38 m 3 kg −1 ODTMA-clay, whereas a reduction of diclofenac concentration from 10 µg L −1 to 0.5 µg L −1 yielded for ODTMA-clay a capacity of 32 m 3 kg −1 .…”

Section: Removal Of Several Non-steroidal Anti-inflammatory (Nsaid) Dmentioning

confidence: 99%

See 2 more Smart Citations

Applications of Chemically Modified Clay Minerals and Clays to Water Purification and Slow Release Formulations of Herbicides

et al. 2020

Self Cite

View full text Add to dashboard Cite

This review deals with modification of montmorillonite and other clay-minerals and clays by interacting them with organic cations, for producing slow release formulations of herbicides, and efficient removal of pollutants from water by filtration. Elaboration is on incorporating initially the organic cations in micelles and liposomes, then producing complexes denoted micelle- or liposome-clay nano-particles. The material characteristics (XRD, Freeze-fracture electron microscopy, adsorption) of the micelle– or liposome–clay complexes are different from those of a complex of the same composition (organo-clay), which is formed by interaction of monomers of the surfactant with the clay-mineral, or clay. The resulting complexes have a large surface area per weight; they include large hydrophobic parts and (in many cases) have excess of a positive charge. The organo-clays formed by preadsorbing organic cations with long alkyl chains were also addressed for adsorption and slow release of herbicides. Another examined approach includes “adsorptive” clays modified by small quaternary cations, in which the adsorbed organic cation may open the clay layers, and consequently yield a high exposure of the siloxane surface for adsorption of organic compounds. Small scale and field experiments demonstrated that slow release formulations of herbicides prepared by the new complexes enabled reduced contamination of ground water due to leaching, and exhibited enhanced herbicidal activity. Pollutants removed efficiently from water by the new complexes include (i) hydrophobic and anionic organic molecules, such as herbicides, dissolved organic matter; pharmaceuticals, such as antibiotics and non-steroidal drugs; (ii) inorganic anions, e.g., perchlorate and (iii) microorganisms, such as bacteria, including cyanobacteria (and their toxins). Model calculations of adsorption and kinetics of filtration, and estimation of capacities accompany the survey of results and their discussion.

show abstract

Section: (C) Role Of Released Cations During Filtrationmentioning

confidence: 89%

Section: Removal Of Pollutants From Water 331 Removal Of Herbicidementioning

confidence: 99%

Section: Removal Of Several Non-steroidal Anti-inflammatory (Nsaid) Dmentioning

confidence: 99%

See 1 more Smart Citation

Applications of Chemically Modified Clay Minerals and Clays to Water Purification and Slow Release Formulations of Herbicides

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Adsorption is among the most efficient technologies to prevent or remediate pollution from pesticides because it relies on low-cost materials such as biomaterials, aluminum, and iron oxides, or oxyhydroxides, zeolites, and clay minerals. Clay minerals exhibit properties such as high superficial area, high adsorption capacity, low cost, and ready availability that are valuable to the development of herbicide formulations with controlled releasing of active components [7,8], cleanup of contaminated soils, groundwater protection [9], and water treatment [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Guidelines to Study the Adsorption of Pesticides onto Clay Minerals Aiming at a Straightforward Evaluation of Their Removal Performance

Masini

Abate

2021

Minerals

View full text Add to dashboard Cite

Natural and modified clay minerals have been extensively used for the adsorption/desorption of organic substances, especially pesticides, from waters and wastewater, aiming at pollution control and more efficient use of the herbicides through controlled release. While natural clay minerals efficiently remove organic cations such as paraquat and diquat, the adsorption of anionic or neutral species demands surface chemical modification with, for instance, quaternary ammonium salts containing long alkyl chains. Basic pesticides, on the other hand, are better absorbed in clay minerals modified with polycations. Kinetic studies and adsorption/desorption isotherms provide the parameters needed to evaluate the clay mineral’s adsorptive performance towards the pollutant target. However, the direct comparison of these parameters is complicated because the experimental conditions, the analytical techniques, the kinetic and isotherm models, and the numerical fitting method differ among the various studies. The free-energy-related Langmuir constant depends on the degree of site occupation; that is, it depends on the concentration window used to construct the adsorption isotherm and, consequently, on the analytical technique used to quantify the free concentrations. This paper reviews pesticides’ adsorption on natural and modified clay minerals and proposes guidelines for designing batch adsorption/desorption studies to obtain easily comparable and meaningful adsorption parameters. Articles should clearly describe the experimental conditions such as temperature, contact time, total concentration window, the solution to adsorbent ratio, the analytical technique, and its detection and quantification limits, besides the fitting models. Research should also evaluate the competitive effects of humic substances, colloidal inorganic particles, and ionic strength to emulate real-world adsorption experiments.

show abstract

“…El TBZ, por el contrario es un ligando bidentado [Grevy et al, 2002], con lo cual el Cu 2+ podría aceptar sólo tres moléculas. Otra posible explicación podría ser que, además de la coordinación entre el átomo de nitrógeno del imidazol y el metal, se establezcan interacciones hidrofóbicas o  entre los anillos [Lelario et al, 2016].…”

Section: Adsorbato Tbz Imzunclassified

Montmorillonitas modificadas para la retención de pesticidas poscosecha (imazalil y tiabendazol)

Gamba¹

View full text Add to dashboard Cite

Las arcillas son materiales que por su versatilidad y abundancia fueron milenariamente utilizados en diversas aplicaciones. Con el desarrollo del conocimiento científico, se pudo asignar a ciertas características físico-químicas sus propiedades específicas y además introducir modificaciones en su estructura con el objetivo de optimizar su aplicabilidad. Las principales características de las montmorillonitas son su gran superficie específica y capacidad de intercambio catiónico que las convierte en excelentes adsorbentes de especies catiónicas. Para mejorar su capacidad de adsorción de especies orgánicas (neutras o aniónicas), se postula someterlas a procesos de intercambio catiónico con aminas alquílicas o metales de transición para generar nuevos sitios activos. En Argentina, la gran actividad agrícola y, en particular, la frutícola, genera grandes volúmenes de efluentes conteniendo distintas moléculas orgánicas que en general son mezclas de fungicidas y detergentes. Antes de su disposición por vertido en aguas naturales, es recomendable tratar estos efluentes para remover posibles contaminantes. En ese sentido, la adsorción es una vía sencilla y económica y el uso de montmorillonitas naturales y modificadas una posibilidad con gran potencialidad. El objetivo de esta tesis es aportar conocimiento acerca de los diversos mecanismos físico-químicos por los cuales dos fungicidas utilizados ampliamente en la industria frutícola en nuestro país y en el mundo (tiabendazol e imazalil), interactúan con montmorillonita (arcilla abundante en el norte de la Patagonia) y con productos de su modificación química. En una primera etapa se compararán las capacidades de adsorción de los fungicidas por parte de la montmorillonita natural y de organo-montmorillonitas (Capítulos 3 y 4). Luego, en una segunda etapa, se evaluará como adsorbente de estos fungicidas -tanto individuales como combinados- una montmorillonita intercambiada con cobre, un metal que también es tóxico a ciertos niveles de concentración y por lo tanto requiere ser removido de efluentes industriales y mineros (Capítulo 5). Se profundizará el estudio sobre el efecto que tiene la presencia del metal en los adsorbentes en la remoción del tiabendazol y se realizará un ensayo preliminar empleando un efluente real de plantas de empaque de frutas de pepita de la provincia de Río Negro (Capítulo 6). Para comprender los procesos se estudiarán variables como el tiempo, pH, la concentración y se caracterizarán los materiales antes y después de los ensayos de adsorción. De esta manera se buscará identificar los sitios activos y el mecanismo involucrado.

show abstract

Pairing micropollutants and clay-composite sorbents for efficient water treatment: Filtration and modeling at a pilot scale

Cited by 19 publications

References 53 publications

Applications of Chemically Modified Clay Minerals and Clays to Water Purification and Slow Release Formulations of Herbicides

Applications of Chemically Modified Clay Minerals and Clays to Water Purification and Slow Release Formulations of Herbicides

Guidelines to Study the Adsorption of Pesticides onto Clay Minerals Aiming at a Straightforward Evaluation of Their Removal Performance

Montmorillonitas modificadas para la retención de pesticidas poscosecha (imazalil y tiabendazol)

Contact Info

Product

Resources

About