Composite modification mechanism of cationic modifier to amphoteric modified kaolin and its effects on surface characteristics

Li, W. B.; Liu, Z.; Meng, Zhaofu; Ren, Shan; Xu, Shaoe; Zhang, Yong; Wang, M. Y.

doi:10.1007/s13762-016-1091-3

Cited by 25 publications

(8 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Table 4 , according to the coefficients of determination (R 2 ), all soils were better fitted with the Freundlich model, which assumes that phenanthrene sorption and desorption occurs on a heterogeneous surface with the possibility of sorption being multi-layered 39 . This phenomenon has also been observed in humic acid and nanometer clay mineral 40 . It showed that the soil adsorption of organic matter was not only surface adsorption but also the process of soil organic matter distribution 41 – 43 reached the equilibrium isotherm fitted well with the Freundlich equation when studying the adsorption behavior of aromatic compounds by solids.…”

Section: Resultssupporting

confidence: 61%

Analysis of influencing factors of phenanthrene adsorption by different soils in Guanzhong basin based on response surface method

Tian

Zhang

Xue³

et al. 2022

Sci Rep

View full text Add to dashboard Cite

Adsorption desorption is an important behavior affecting the migration of phenanthrene in soil. In this study, three typical soils of loess, silts and silty sand in Guanzhong Basin, Shaanxi Province, China were used as adsorbents. Batch equilibrium experiments were carried out to study the adsorption desorption kinetics and isotherm of phenanthrene in different soils. Response surface method (RSM) was used to study the effects of temperature, pH, phenanthrene concentration and organic matter content on soil adsorption of phenanthrene. The results showed that after adsorption, the outline of soil particles became more blurred and the degree of cementation increased. The kinetic adsorption of phenanthrene by soil conforms to the quasi second-order kinetic model, and the adsorption desorption isotherm is nonlinear and conforms to the Freundlich model. Due to the difference of soil properties, the adsorption amount of phenanthrene by soil is loess > silty sand > silts. The thermodynamic results show that the adsorption of phenanthrene by soil is spontaneous and endothermic, and the desorption is spontaneous and exothermic. Through RSM, the interaction between phenanthrene concentration and soil organic matter in Loess and silts is significant, and the interaction between temperature and soil organic matter in silty sand is significant. Among the four factors affecting the adsorption rate of loess, silts and silty sand, soil organic matter is the most significant. The theoretical optimum adsorption rates of loess, silts and silty sand are 98.89%, 96.59% and 93.37% respectively.

show abstract

Section: Resultssupporting

confidence: 61%

Analysis of influencing factors of phenanthrene adsorption by different soils in Guanzhong basin based on response surface method

Tian

Zhang

Xue³

et al. 2022

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The infrared spectrum of kaolin contains mainly Al-O and Si-O vibration peaks. 13,14 The -OH and H 2 O vibrations in the interior and surface of kaolin are at 4000-3200 and 1630 cm −1 , while the vibrations of Si-O and Al-O are mainly located at 400-1300 cm −1 . After treatment with citric acid, the bending vibrations of Si-O shifted from 1223 to 1094 cm −1 .…”

Section: Resultsmentioning

confidence: 96%

Citric Acid Modified Kaolin and Its Application in Polyamide Wet Coating

Lei¹,

Wang²,

Ye³

et al. 2019

AATCC Journal of Research

View full text Add to dashboard Cite

The ink absorption of polyamide-coated polyamide textile products containing kaolin is poor. Citric acid was used to modify kaolin, and the adsorptive performance of rhodamine B was studied. The modified kaolin with the best adsorptive ability was selected. The results showed that kaolin modified with a 2.0 M citric acid solution was strongly adsorptive. During the interaction between citric acid and kaolin, H+ acts on the surface and interlayer of kaolin, and on Al3+ and Si4+ in the kaolin. This results in an increase in the specific surface area and a smaller particle size. After using modified kaolin in the polyamide wet coating, the ink-absorption of polyamide-coated polyamide fabrics improved and the resulting pH value met Oeko-Tex Standard 100 requirements for textile use.

show abstract

“…PBT had good adsorption capabilities for both organic contaminants and heavy metal ions, contrasted with quaternary ammonium salt modifications [ 43 ]. This was primarily due to the complex modification of the amphoteric surfactant betaine with SPA, which improved the hydrophilicity and dispersibility of the bentonite while increasing the number of adsorption sites.…”

Section: Resultsmentioning

confidence: 99%

“…Liu [ 41 , 42 ] found that modified bentonite with amphoteric surfactants was effective at adsorbing bisphenol A, Pb 2+ , and Cd 2+ . This was probably due to the carboxyl groups (−COO−) and positively charged groups (−N + ) that were present in the amphoteric surfactants, which make it simpler to adsorb metal ions and organic contaminants [ 43 , 44 , 45 ].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Impermeability of Nanodispersible Modified Bentonite Based on Colloidal Osmotic Pressure Mechanisms and the Adsorption of Harmful Substances

Zhang

Gong

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

With the growing demands of human beings, sanitary landfill, along with the increase in landfill depth and leachate water pressure, has put forward new and higher requirements for the impermeable layer. In particular, it is required to have a certain adsorption capacity of harmful substances from the perspective of environmental protection. Hence, the impermeability of polymer bentonite–sand mixtures (PBTS) at different water pressure and the adsorption properties of polymer bentonite (PBT) on contaminants were investigated through the modification of PBT using betaine compounded with sodium polyacrylate (SPA). It was found that the composite modification of betaine and SPA could reduce the average particle size of PBT dispersed in water (reduced to 106 nm from 201 nm) and enhance the swelling properties. As the content of SPA increased, the hydraulic conductivity of PBTS system decreases and the permeability resistance improves, while the resistance to external water pressure increases. It is proposed a concept of the potential of osmotic pressure in a constrained space to explain the impermeability mechanism of PBTS. The potential of osmotic pressure obtained by linear extrapolation of the trendline of colloidal osmotic pressure versus mass content of PBT could represent the external water pressure that the PBT resist. Additionally, the PBT also has a high adsorption capacity for both organic pollutants and heavy metal ions. The adsorption rate of PBT was up to 99.36% for phenol; up to 99.9% for methylene blue; and 99.89%, 99.9%, and 95.7% for low concentrations of Pb2+, Cd2+, and Hg+, respectively. This work is expected to provide strong technical support for the future development in the field of impermeability and removal of hazardous substances (organic and heavy metals).

show abstract

Composite modification mechanism of cationic modifier to amphoteric modified kaolin and its effects on surface characteristics

Cited by 25 publications

References 22 publications

Analysis of influencing factors of phenanthrene adsorption by different soils in Guanzhong basin based on response surface method

Analysis of influencing factors of phenanthrene adsorption by different soils in Guanzhong basin based on response surface method

Citric Acid Modified Kaolin and Its Application in Polyamide Wet Coating

A Study on the Impermeability of Nanodispersible Modified Bentonite Based on Colloidal Osmotic Pressure Mechanisms and the Adsorption of Harmful Substances

Contact Info

Product

Resources

About