Electrokinetic remediation and other physico-chemical remediation techniques for in situ treatment of soil from contaminated nuclear and NORM sites

Cameselle, Claudio

doi:10.1016/b978-1-78242-231-0.00008-9

Cited by 9 publications

(6 citation statements)

References 31 publications

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“…The trapped oil in the soil is removed through a microemulsion system formulated by the surfactant solution and oil and is associated with an ultralow interfacial tension (IFT) value (<0.01 mN m −1 ) (Liu et al, 2019; Rosen et al, 2005). The use of microemulsions is not only simple, but it is also cost‐competitive when the microemulsion formation is optimized (Agarwal and Liu, 2015; Cameselle, 2015; Rodriguez et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Effect of Ethylene Oxide Group in the Anionic–Nonionic Mixed Surfactant System on Microemulsion Phase Behavior

Kittithammavong

Charoensaeng

Khaodhiar

2020

J Surfact & Detergents

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The phase behavior of microemulsions stabilized by a binary anionic-nonionic surfactant mixture of sodium dihexyl sulfosuccinate (SDHS) and C12-14 alcohol ethoxylate (C 12 − 14 E j ) that contains an ethylene oxide (E j ) group number, j, of either 1, 5, or 9 was investigated for oil remediation. The oil-water interfacial tension (IFT) and optimal salinity of the microemulsion systems with different equivalent alkane carbon numbers (EACN) were examined. The anionic-nonionic surfactant ratio was found to play a pivotal role in the phase transition, IFT, and optimal salinity. The minimum IFT of mixed SDHS − C 12 − 14 E j systems were about three times lower than those of neat SDHS systems. A hydrophilic-lipophilic deviation (HLD) empirical model for the mixed anionic-nonionic surfactant system with the characteristic parameter was proposed, as represented in the excess free energy term G EX RT À Á. The results suggested that the mixed system of SDHS − C 12 − 14 E 1 was more lipophilic, while SDHS − C 12 − 14 E 9 was more hydrophilic than the ideal mixture (no excess free energy during the microemulsion formation), and the SDHS − C 12 − 14 E 5 system was close to the ideal mixture. The findings from this work provide an understanding of how to formulate mixed anionic-nonionic microemulsion systems using the HLD model for oils that possess a wide range of EACN.

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Section: Introductionmentioning

confidence: 99%

Effect of Ethylene Oxide Group in the Anionic–Nonionic Mixed Surfactant System on Microemulsion Phase Behavior

Kittithammavong

Charoensaeng

Khaodhiar

2020

J Surfact & Detergents

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“…Condiciones de acidez como las que se generan en la región anódica por la electrólisis del agua, favorecen la movilidad de los metales ya que solubilizan los hidróxidos o sales metálicas y se produce su desadsorción en los sitios de intercambio catiónico. No obstante, el frente básico generado en el cátodo limita el movimiento de los metales al formar precipitados y evitar su reducción o migración hacia el fluido catódico, proceso que puede ser inhibido con la adición controlada de ácidos (Cameselle 2015. En consecuencia, es frecuente potenciar la movilidad de los metales en el suelo con soluciones ácidas, pues los iones H + no sólo inducen la desadsorción y disolución de cationes metálicos (ecuación 1 y ecuación 2 respectivamente), sino que también neutralizan los OHelectrogenerados en el cátodo.…”

Section: Introductionunclassified

Tratamiento electroquímico mejorado para la remoción de metales de suelos contaminados por pasivos ambientales mineros

Torres Zevallos,

Sánchez-Ccoyllo,

Marcelino Tarmeño

2024

Rev. Int. Contam. Ambie.

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Los pasivos ambientales mineros (PAM) son residuos con alta carga de metales que tienen el potencial de contaminar el suelo circundante, afectar negativamente la calidad del agua y aire, degradar los ecosistemas y provocar efectos tóxicos en la salud humana. Este estudio utilizó el tratamiento electroquímico como técnica de remediación para descontaminar un suelo afectado por PAM. A través de un diseño factorial mixto se investigó los efectos de las soluciones de mejora, ácido acético y ácido nítrico, y tres distancias del suelo respecto al ánodo, sobre la concentración residual y distribución espacial unidimensional de Pb, Cd y Zn. Los ensayos se realizaron por triplicado, en celdas de acrílico, durante cinco días, sometidos a 30 V de potencia y con ácido nítrico como fluido catódico. Los resultados demostraron que el ácido nítrico reduce 4.0, 11.5 y 11.3 veces el contenido de Pb, Cd y Zn en comparación con el ácido acético, es decir, que los mayores porcentajes de remoción del Pb, Zn y Cd fueron 40, 34 y 23 % respectivamente, al emplear ácido nítrico. Asimismo, la distribución espacial unidimensional de los metales en el suelo después del tratamiento, no fue un gradiente de concentración creciente desde la región anódica hacia la región catódica, sino una tendencia homogénea. Por tanto, emplear ácido nítrico como fluido de mejora confirmó la viabilidad del tratamiento electroquímico, aunque se debería potenciar en otras condiciones experimentales para alcanzar mayores tasas de remediación.

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“…Phytoremediation being dependent on plant's physiology totally depends upon the strategy and resilience of the plant to thrive in unfavorable conditions therefore alone phytoremediation consumes a long period to fulfill the purpose for which it is planted. To enhance phytoaccumulation efficiency a number of amendments have been introduced out of which electrokinetic remediationhas made significant stride in the recent past (Cameselle et al, (2013) and Cameselle (2015)). Electrokinetic field (EKF) indulgesin the application of direct or alternating current in the spiked soil via electrodes(X Mao (2016); Bi et al (2011Bi et al ( ,2012and Aboughalma et al (2008)) Electrokinetic remediation is a directional environmental technique developed on purpose for the removal of a range of contaminants present in the soil, sludge and sediments, this technique can be applied to any solid porous material or surface (Reddy and Cameselle (2009)), the technique is premised on the exertion of the DC electric current of low intensity to a cavernulous matrix which needs decontamination.…”

Section: Introductionmentioning

confidence: 99%

Electric Current; A Better Alternate Compared to Edta in Rapid Accumulation of Heavy Metal in Tagetes Erecta

Kaur¹,

Singh²,

Srivastava³

2020

PLANT ARCHIVES

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Electrokinetic remediation is an innovative technique to clean spiked soils, in the experiment undertaken effect of current and chemical chelators have been studied and discussed on marigold in potted plants, 15 d(days) old plant were transferred to pots followed up by discrete treatment with 3 milimolar(mM) ethylenediaminetetra acetic acid (EDTA) and electric current. Increasing voltage of DC current (i.e. 1V, 2V, 3V and 4V) was applied for 15 min (minute) for 30 days (d). The findings unveiled that the shoot of physically amended plant was capable of accumulating higher values of metal on 30thd initially, however on 45thd the accumulation was almost same for chemically and physically amended plants. The faster accumulation of heavy metal was aided by the intermediate values of current which helped the plant to withdraw maximum heavy metal on 30th(d) day which proves electrokinetic remediation to be a rapid and better alternative compared to EDTA which shows retarded remediation initially because of damage caused by it to the root hair and has potential threat to contaminate the underground water due to leaching of heavy metals.

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Electrokinetic remediation and other physico-chemical remediation techniques for in situ treatment of soil from contaminated nuclear and NORM sites

Cited by 9 publications

References 31 publications

Effect of Ethylene Oxide Group in the Anionic–Nonionic Mixed Surfactant System on Microemulsion Phase Behavior

Effect of Ethylene Oxide Group in the Anionic–Nonionic Mixed Surfactant System on Microemulsion Phase Behavior

Tratamiento electroquímico mejorado para la remoción de metales de suelos contaminados por pasivos ambientales mineros

Electric Current; A Better Alternate Compared to Edta in Rapid Accumulation of Heavy Metal in Tagetes Erecta

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