Adsorption properties and mechanism of montmorillonite modified by two Gemini surfactants with different chain lengths for three benzotriazole emerging contaminants: Experimental and theoretical study

Zhang, Hongling; Xia, Mingzhu; Wang, Tianyi; Li, Pingping; Shi, Mingxing

doi:10.1016/j.clay.2021.106086

Cited by 24 publications

(9 citation statements)

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“…Díez-Pascual et al [77] study the influence of surfactants with different chain lengths on the morphology of graphene and find that the thickness of the graphite flakes increases with the increase of the surfactant chain length, and the longer the molecular chain, the higher the surface coverage. Zhang et al [78] use two Gemini surfactants (only the length of the hydrophobic tail is different) to study the adsorption of emerging pollutants after modified montmorillonite and find that an increase in the alkyl chain lengths can increase the mobility of molecules. Badache et al [79] study the effects of different hydrophobic tail chain lengths on the interfacial properties of cationic surfactants and find that the surfactant with the longest chain has the lowest critical micelle concentration.…”

Section: Introductionmentioning

confidence: 99%

Computational Study on the Microscopic Adsorption Characteristics of Linear Alkylbenzene Sulfonates with Different Chain Lengths on Anthracite Surface

Chen

Yan

et al. 2022

Journal of Chemistry

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In order to explore the influence of different lengths of hydrophobic carbon chains on the diffusion characteristics of surfactants on the surface of anthracite, six linear alkyl benzene sulfonates with different hydrophobic carbon chain lengths were selected (mC, m = 8, 10, 12, 14, 16, 18; m represents the numbers of carbon atoms in the hydrophobic carbon chain), and molecular dynamics (MD) simulations were adopted. Models of surfactant-anthracite, surfactant-graphite layer, and water-surfactant-anthracite were constructed. After analyzing a series of properties such as adsorption energy, diffusion coefficient, radial distribution function (RDF), and hydrophobic tail order parameters, it was found that 12C had the highest adsorption strength on the surface of anthracite; the reason was that 12C had the highest degree of aggregation near the oxygen-containing functional groups on the surface of anthracite. Further studies had found that the hydrophobic tail chain of 12C had the strongest isotropy. The study fills the gap in the systematic study of the diffusion characteristics of linear alkylbenzene sulfonates (LAS) with different chain lengths on the surface of anthracite, enriches and develops the basic theory of coal wettability, and also provides technical ideas for the design of new surfactants and new dust suppression agents.

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Section: Introductionmentioning

confidence: 99%

Computational Study on the Microscopic Adsorption Characteristics of Linear Alkylbenzene Sulfonates with Different Chain Lengths on Anthracite Surface

Chen

Yan

et al. 2022

Journal of Chemistry

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“…They are mostly organic and highly polar contaminants, such as drugs, hormones, herbicides, pesticides, dyes, and toxic metals, among other compounds 2 . Due to the low biodegradability of these contaminants, they are not entirely removed in waste water treatment plants 2–7 and are often found in surface water, groundwater, and even drinking water at concentrations of nanograms to micrograms per liter 8 . Therefore, it is necessary to study and improve the techniques to remove those contaminants.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is necessary to study and improve the techniques to remove those contaminants. Among the techniques developed are advanced oxidative processes, 5 membrane separation, 6 ion exchange, 7 adsorption, 4 and the combination of one or more techniques 9–11 . Among the techniques mentioned, the adsorption process stands out for its low cost, easy operation and implementation, and wide application 10 …”

Section: Introductionmentioning

confidence: 99%

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The ‘chimie douce’ process towards the modification of natural zeolites for removing drugs and pesticides from water

Viotti

Moreira

Straioto

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND Drugs and pesticides are emerging contaminants, and their presence in surface and groundwater have been increasing. Therefore, this work aims to study the modification of natural zeolite to remove these contaminants from water. RESULTS Among the modifications carried out, hydrothermal treatment in the presence of surfactant (CTAB) was highlighted. The hydrothermal treatment with surfactant provided a structural rearrangement. As a result, the zeolite became more hydrophobic, with a smaller specific area and a more significant amount of mesopores and macropores. Changes in textural and chemical characteristics resulted in a significant increase in the removal of the evaluated pesticides and drugs. In order to evaluate the potential of zeolites to remove emerging contaminants under conditions closer to reality, the modified samples were evaluated in the adsorption process of simulated contaminated water. The maximum adsorption capacities obtained were 28.24, 3.07, and 20.06 mg g−1 for 2,4‐D, diuron, and diclofenac, respectively, using HT‐H2O_CTAB under conditions closer to real water treatment (30 °C and natural pH of the solution). CONCLUSION The results demonstrate that hydrothermal modification with CTAB is a promising ‘chimie douce’ technique to use natural zeolites to remove emerging contaminants. © 2022 Society of Chemical Industry (SCI).

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“…Such modification, known as organophilization, favors the creation of intercalated or exfoliated composites. The susceptibility of ammonium salts containing alkyl chains to thermal decomposition leading to the elimination of olefins is considered to be the main disadvantage of their use as Mt modifiers [ 11 , 12 ]. To improve the stability of organophilic montmorillonites, other types of organic cations have been used, e.g., phosphonium, imidazolium, or aryl ammonium [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

New Organophilic Montmorillonites with Lactic Acid Oligomers and Other Environmentally Friendly Compounds and Their Effect on Mechanical Properties of Polylactide (PLA)

et al. 2021

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New organophilic montmorillonites with oligomers of lactic acid and other compounds such as citric acid, stearic acid, maleic anhydride, pentaerythritol and ε-caprolactone were synthesized. They were characterized by Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), Thermogravimetric Analysis (TGA), Scanning Electron Microscopy (SEM), elemental analysis and swelling capacity in water. In all tested composites, an increase in the montmorillonite interlayer distance resulting from intercalation of the modifying substance in the montmorillonite was found by means of XRD. Elemental analysis and FTIR showed that all of the tested samples contained an organic segment in the montmorillonite structure. TGA studies revealed that composites modified with lactic acid oligomers, stearic acid or ε-caprolactone had the highest thermal stability. They also exhibited the lowest swelling capacity which was 2–3 times lower than that for unmodified sodium montmorillonite. Some preliminary studies on the mechanical properties of PLA/modified montmorillonite are also presented and discussed.

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Adsorption properties and mechanism of montmorillonite modified by two Gemini surfactants with different chain lengths for three benzotriazole emerging contaminants: Experimental and theoretical study

Cited by 24 publications

References 50 publications

Computational Study on the Microscopic Adsorption Characteristics of Linear Alkylbenzene Sulfonates with Different Chain Lengths on Anthracite Surface

Computational Study on the Microscopic Adsorption Characteristics of Linear Alkylbenzene Sulfonates with Different Chain Lengths on Anthracite Surface

The ‘chimie douce’ process towards the modification of natural zeolites for removing drugs and pesticides from water

New Organophilic Montmorillonites with Lactic Acid Oligomers and Other Environmentally Friendly Compounds and Their Effect on Mechanical Properties of Polylactide (PLA)

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