Transport of Kaolinite Colloids through Quartz Sand: Influence of Humic Acid, Ca2+, and Trace Metals

Akbour, Rachid Aı̈t; Douch, J.; Hamdani, Mohamed; Schmitz, Philippe

doi:10.1006/jcis.2002.8523

Cited by 69 publications

(40 citation statements)

References 24 publications

(27 reference statements)

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“…In general, the attachment efficiency of the latex colloids in the presence of NOM is lower or equal to that measured in the absence of humics. By and large, this result is in qualitative agreement with other studies investigating the influence of NOM on colloid deposition kinetics [12,14,38,48,49]. Franchi and O'Melia [12] found that SRHA adsorbed on the surface of 98 nm sized sulfate latex colloids reduced the deposition of the particles onto the surface of glass bead collectors and enhanced the reentrainment of deposited particles in the porous media.…”

Section: Effect Of Nomsupporting

confidence: 88%

“…However, in the absence of Ca 2+ , addition of humic acid did not have a comparable effect [50]. In a related study [49], researchers demonstrated that adsorption of humic acid onto the surface of kaolinite colloids caused a decrease in particle deposition rates. The generally observed increase in colloid stability in the presence of humics has traditionally been attributed to the effect of NOM on particle surface potential.…”

Section: Effect Of Nommentioning

confidence: 95%

“…The generally observed increase in colloid stability in the presence of humics has traditionally been attributed to the effect of NOM on particle surface potential. Several researchers have shown that NOM acts to increase the absolute value of colloid zeta potential for negatively charged colloids [12,37,38,49]. The measurements for the two smaller nanoparticles (50 and 110 nm colloids) presented in Fig.…”

Section: Effect Of Nommentioning

confidence: 95%

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Effect of particle size and natural organic matter on the migration of nano- and microscale latex particles in saturated porous media

Pelley

Tufenkji

2008

Journal of Colloid and Interface Science

265

142

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In the interest of fully assessing the potential environmental risks linked to "nanolitter," we need to be able to predict the persistence, toxicity, and mobility of engineered nanomaterials in the natural subsurface environment. To examine the effects of particle size and natural organic matter on nanoparticle mobility, laboratory-scale filtration experiments were performed using different sized model nanomaterials (i.e., latex colloids having diameters of 50, 110, and 1500 nm) in the presence and absence of 5.0 mg/L Suwannee River humic acid (SRHA). At low ionic strengths (1-10 mM KCl), an increase in attachment efficiency (alpha) with increasing particle size was observed. This result contrasts with predictions of particle filtration based on attachment in the primary energy minimum of the particle-grain interaction energy profile evaluated using Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. The presence of SRHA generally resulted in a decrease in alpha over the range of experimental conditions investigated. Results of particle transport experiments combined with particle characterization measurements suggest that the decrease in colloid attachment in the presence of SRHA is related to the combined influence of the mechanisms of charge stabilization and steric stabilization.

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Section: Effect Of Nomsupporting

confidence: 88%

Section: Effect Of Nommentioning

confidence: 95%

Section: Effect Of Nommentioning

confidence: 95%

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Effect of particle size and natural organic matter on the migration of nano- and microscale latex particles in saturated porous media

Pelley

Tufenkji

2008

Journal of Colloid and Interface Science

265

142

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“…This is probably due to a decrease in repulsive forces between the kaolinite colloids and sand resulting from diffused double layer compression by divalent ions (Akbour et al 2002). Similar results were previously reported in the co-transport study of nHAP and Cu 2+ in the saturated sand column , where the amount of nHAP retained in the sand column increased with increasing NaCl concentrations and, especially, CaCl 2 .…”

Section: Ionic Strength (Mm)supporting

confidence: 88%

Kaolinite and Cd2+ Transport and Interaction in Sand Media: Batch and Column Experiments

Wikiniyadhanee¹,

Chotpantarat²,

Ong³

2016

Terr. Atmos. Ocean. Sci.

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Batch sorption and column transport experiments were used to investigate kaolinite colloids and Cd(II) ions (Cd 2+ ) cotransport in water-saturated sand media. Batch sorption was used to evaluate Cd 2+ sorption onto kaolinite clay as a function of the initial Cd 2+ concentrations and solution ionic strengths as well as determining the equilibrium sorption isotherms. For very low ionic strength (~0 mM), the Langmuir isotherm was the more suitable isotherm for the experimental results while at higher ionic strength (> 0.45 mM) the Freundlich isotherm was the more suitable isotherm. The sorption parameters, K F , K L , n, and q m , were found to decrease with increasing ionic strength. For column transport experiments, Cd 2+ -bearing kaolinite colloids were found to be retained more in the column for an increase in the solution ionic strength. For example, the steady state breakthrough rate of Cd 2+ -bearing kaolinite colloids was 0.2 C i /C 0 for an ionic strength of 0.0 mM compared to about 0.05 C i /C 0 for ionic strengths of 0.45 and 0.9 mM. This increased Cd 2+ -bearing kaolinite colloid retention trend with increased solution ionic strength was likely due to the reduced zeta-potential and increased size of the colloid particles at higher ionic strengths. Consequently, the kaolinite-facilitated Cd 2+ concentration decreased with increasing solution ionic strength. In summary, solution ionic strength had a strong effect on the transport behavior of kaolinite-facilitated Cd 2+ and Cd 2+-bearing kaolinite colloids through the sand column.

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“…Contaminants such as Cu ions are typically present in contaminated soil pore water solutions and groundwater environments in their dissolved state. The presence of dissolved Cu 2+ ions in bulk solution can substantially change the electrochemical properties of colloidal particles having a significant influence on particle transport and deposition in porous media [25,26]. A more realistic investigation therefore entails observing the transport behavior of HA-modified nHAP in the presence of dissolved Cu 2+ ions.…”

Section: Introductionmentioning

confidence: 99%

Transport behavior of humic acid-modified nano-hydroxyapatite in saturated packed column: Effects of Cu, ionic strength, and ionic composition

Wang

Chu

Paradelo

et al. 2011

Journal of Colloid and Interface Science

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Transport of Kaolinite Colloids through Quartz Sand: Influence of Humic Acid, Ca2+, and Trace Metals

Cited by 69 publications

References 24 publications

Effect of particle size and natural organic matter on the migration of nano- and microscale latex particles in saturated porous media

Effect of particle size and natural organic matter on the migration of nano- and microscale latex particles in saturated porous media

Kaolinite and Cd2+ Transport and Interaction in Sand Media: Batch and Column Experiments

Transport behavior of humic acid-modified nano-hydroxyapatite in saturated packed column: Effects of Cu, ionic strength, and ionic composition

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