Colloidal stability and correlated migration of illite in the aquatic environment: The roles of pH, temperature, multiple cations and humic acid

Wei, Xiaoyan; Pan, Duoqiang; Xu, Zhaoyi; Xian, Dongfan; Li, Xiaolong; Tan, Zhijian; Liu, Chunli; Wu, Wangsuo

doi:10.1016/j.scitotenv.2020.144174

Cited by 30 publications

(8 citation statements)

References 57 publications

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“…Comparing the charge density and CCIS values in the presence of KCl and CaCl 2 , the higher affinity of the Ca 2+ to the negatively charged particle is clearly visible since these parameters decreased significantly as the counterion’s valence was increased. This finding can be explained by the fact that divalent cations are more effective in charge screening than monovalent ones, as reported earlier in other particle–electrolyte systems. ,,− …”

Section: Resultssupporting

confidence: 69%

“…The applicability of particle dispersions in the presence of surfactants is strongly influenced by factors such as ionic strength and background electrolyte composition. 53 Thus, the colloidal stability of the SL-12-4-12 system was explored in wide concentration ranges of various inorganic salts. In this way, the basic colloidal properties of the bare SL particles in terms of the influence of salt composition and valence of the counter and coions were assessed first.…”

Section: Resultsmentioning

confidence: 99%

“…This finding can be explained by the fact that divalent cations are more effective in charge screening than monovalent ones, as reported earlier in other particle–electrolyte systems. 11 , 18 , 53 − 56 …”

Section: Resultsmentioning

confidence: 99%

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Structure–Stability Relationship in Aqueous Colloids of Latex Particles and Gemini Surfactants

et al. 2022

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The influence of gemini surfactants (GSs) on the charging and aggregation features of anionic sulfate modified latex (SL) particles was investigated by light scattering techniques in aqueous dispersions. The GSs of short alkyl chains (2-4-2 and 4-4-4) resembled simple inert salts and aggregated the particles by charge screening. The adsorption of GSs of longer alkyl chains (8-4-8, 12-4-12, and 12-6-12) on SL led to charge neutralization and overcharging of the particles, giving rise to destabilization and restabilization of the dispersions, respectively. The comparison of the interfacial behavior of dimeric and the corresponding monomeric surfactants revealed that the former shows a more profound influence on the colloidal stability due to the presence of double positively charged head groups and hydrophobic tails, which is favorable to enhancing both electrostatic and hydrophobic particle–GS and GS–GS interactions at the interface. The different extent of the particle–GS interactions was responsible for the variation of the GS destabilization power, following the 2-4-2 < 4-4-4 < 8-4-8 < 12-4-12 order, while the length of the GS spacer did not affect the adsorption and aggregation processes. The valence of the background salts strongly influenced the stability of the SL-GS dispersions through altering the electrostatic interactions, which was more pronounced for multivalent counterions. These findings indicate that both electrostatic and hydrophobic effects play crucial roles in the adsorption of GSs on oppositely charged particles and in the corresponding aggregation mechanism. The major interparticle forces can be adjusted by changing the structure and concentration of the GSs and inorganic electrolytes present in the systems.

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Section: Resultssupporting

confidence: 69%

Section: Resultsmentioning

confidence: 99%

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Structure–Stability Relationship in Aqueous Colloids of Latex Particles and Gemini Surfactants

et al. 2022

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“…Under natural conditions, colloids can be released from the soil solid matrix and interact with the surrounding environments 6 . Colloidal particles in aquatic environment are the carriers of heavy metal ions and nutrient elements, leading to colloid-driven transportation when the colloids are stable 2 , 4 , 7 . Depending on the stability of soil aggregates, the dispersion and mobilization of soil colloids are also related to soil erosion 8 – 11 .…”

Section: Introductionmentioning

confidence: 99%

Quantitative characterization of non-DLVO factors in the aggregation of black soil colloids

Gao

Kou

Ren

et al. 2022

Sci Rep

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The variable role and fate of soil colloids under different environmental conditions are derived from their dispersion and aggregation properties. In this work, dynamic and static light scattering were used to characterize the original size, aggregation kinetics of natural black soil colloids (BSCs) and structural features of aggregates in electrolytes with different cations (K+, Mg2+, Ca2+), respectively. For these three cations, the aggregation kinetics followed the trend of Ca2+ > Mg2+ > K+ and the critical coagulation concentration (CCC) followed the sequence: K+ (134.30 mmol L−1) > Mg2+ (13.27 mmol L−1) > Ca2+ (4.19 mmol L−1). The results indicated that the aggregation behavior in different valence cation systems followed the classical Derjaguin-Landau-Verwey-Overbeek (DLVO) model qualitatively. However, the quantitative differences of CCC suggest the existence of ion-specific effects. The effective ionic charge coefficient 1.31, 2.20, and 2.78 of K+, Mg2+ and Ca2+ were proposed to consider of all the non-DLVO factors, which were obtained by forming a relationship based on mathematic between the electrostatic repulsion and the van der Waals attractive interaction at the CCC. The non-classical polarization of cations in a strong soil electric field is a primary mechanism of cation effects on soil colloid interactions, causing the difference in colloid interaction energy and further affecting soil colloid aggregation. This result is crucial for enriching the theory of charged colloidal interactions.

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“…García‐García et al (2009) investigated the aggregation kinetics of colloidal montmorillonite particles at different pH values and found that the aggregation rate constant increased with decreasing pH when comparing the rate constants in the alkaline and acidic pH regions. Wei et al (2021) reported that acidity showed a significant influence on the stability of illite colloids, and the mean hydrodynamic size of illite colloids increased as the pH decreased. The aggregation of colloid mixtures showed a similar dependence on pH.…”

Section: Introductionmentioning

confidence: 99%

Polarisation‐induced covalent interactions between H⁺ and surface O atoms promote clay aggregation

Liu

Tian

Feng

et al. 2022

European J Soil Science

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Accumulation of H + can cause soil acidification, affect soil particle interactions, and alter soil processes. In this study, aggregation kinetics of montmorillonite colloids induced by monovalent ions of Li + and H + were determined by dynamic light scattering. The experimental results indicated that the critical coagulation concentration (CCC) value of Li + was 4.5 times that of H + , indicating that H + can strongly promote montmorillonite colloids aggregation. Joint analysis of the adsorption force type and energy of Li + and H + as well as the infrared spectroscopy of Li + and H + montmorillonite indicated that there was only electrostatic adsorption for Li + , while there was not only electrostatic adsorption but also a new type of covalent adsorption for H + : polarisation-induced covalent adsorption.

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Colloidal stability and correlated migration of illite in the aquatic environment: The roles of pH, temperature, multiple cations and humic acid

Cited by 30 publications

References 57 publications

Structure–Stability Relationship in Aqueous Colloids of Latex Particles and Gemini Surfactants

Structure–Stability Relationship in Aqueous Colloids of Latex Particles and Gemini Surfactants

Quantitative characterization of non-DLVO factors in the aggregation of black soil colloids

Polarisation‐induced covalent interactions between H⁺ and surface O atoms promote clay aggregation

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Colloidal stability and correlated migration of illite in the aquatic environment: The roles of pH, temperature, multiple cations and humic acid

Cited by 30 publications

References 57 publications

Structure–Stability Relationship in Aqueous Colloids of Latex Particles and Gemini Surfactants

Structure–Stability Relationship in Aqueous Colloids of Latex Particles and Gemini Surfactants

Quantitative characterization of non-DLVO factors in the aggregation of black soil colloids

Polarisation‐induced covalent interactions between H+ and surface O atoms promote clay aggregation

Contact Info

Product

Resources

About

Polarisation‐induced covalent interactions between H⁺ and surface O atoms promote clay aggregation