Fast and environmental-friendly approach towards uniform hydrogel particles with ultrahigh and selective removal of anionic dyes

Liu, Xianda; Zhou, Zhengxiang; Yin, Jiarui; He, Chao; Zhao, Weifeng; Zhao, Changsheng

doi:10.1016/j.jece.2020.104352

Cited by 19 publications

(6 citation statements)

References 73 publications

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“…In order to further investigate the special influence of adsorption process, the batch adsorption experiment was studied and evaluated by the following kinetic model [41]. Lagergren's pseudo-first-order kinetics model presumes that the adsorption process is mainly controlled by physisorption process, while Ho's pseudo-second-order kinetics model describes the adsorption process as occurring through chemisorption [42,43].…”

Section: Adsorption Kinetics Of Cs-de@ca Beadsmentioning

confidence: 99%

Preparation of Chitosan-Diatomite/Calcium Alginate Composite Hydrogel Beads for the Adsorption of Congo Red Dye

Zhao

Shen

2023

Water

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In this paper, novel eco-friendly cross-linked chitosan-diatomite/calcium alginate (CS-DE@CA) composite hydrogel beads were successfully prepared for water purification. The obtained sorbents were characterized and studied by using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA), which confirmed the successful modification and encapsulation of diatomite into hydrogel beads. The adsorption performance of composite beads for Congo red in an aqueous solution was studied by ultraviolet-visible spectrophotometry. In particular, the CS-DE@CA exhibited higher removal efficiencies (~89.9%) than the removal efficiencies (~83.6%) of the DE@CA (in the temperature = 20 °C, 100 mL, 50 mg/L, and pH = 7). It was also found that adsorption capacity of Congo red increased from 23.28 mg/g to 38.84 mg/g when the starting concentration increased from 25 mg/L to 75 mg/L. The adsorption process was dominated by chemisorption, and its maximum adsorption capacity for Congo red was calculated to be 48.42 mg/g by Langmuir model. Additionally, the as-prepared sorbent maintained an exceptional adsorption capacity after four adsorption–desorption cycles. Overall, this study also provides new guidance and avenues for further fabrication and development of eco-friendly purifier for the removal of Congo red in contaminated water.

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Section: Adsorption Kinetics Of Cs-de@ca Beadsmentioning

confidence: 99%

Preparation of Chitosan-Diatomite/Calcium Alginate Composite Hydrogel Beads for the Adsorption of Congo Red Dye

Zhao

Shen

2023

Water

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“…In this study, a simple and convenient method of PDIC is employed for the preparation of microspheres, allowing for the production of a large quantity of microspheres within 3 min. , Rosiglitazone (R), a selective peroxisome proliferator-activated receptor gamma agonist, is chosen as a typical drug to inhibit the inflammatory response in AS. − Acrylic acid (AA) and acrylated chondroitin sodium sulfate (CSA) are used to provide negatively charged sites for LDL adsorption due to their abundant carboxyl and sulfonic acid groups, − and the CSA (structure similar to LDL receptors) has been shown to recognize LDL to some extent. ,, Acrylated beta-cyclodextrin (CD) with a hydrophilic outer cavity and hydrophobic inner cavity is utilized as a weak binding site for R and provides a strong hydrophobic site for LDL after R release. , In brief, monomers are dissolved in deionized water to obtain homogeneous aqueous solution, and then, AA-CSA-CD are prepared through the PDIC in a single droplet. The obtained microspheres are placed in a dimethyl sulfoxide solution of R, and after complete binding of the R, the LDL adsorption microspheres AA-CSA-CD-R are obtained.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simultaneous Rosiglitazone Release and Low-Density Lipoprotein Removal by Chondroitin Sodium Sulfate/Cyclodextrin/Poly(acrylic acid) Composite Adsorbents for Atherosclerosis Therapy

Xiao,

Xu,

Liu

et al. 2024

Biomacromolecules

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Atherosclerosis (AS) is characterized by the accumulation of substantial low-density lipoprotein (LDL) and inflammatory response. Hemoperfusion is commonly employed for the selective removal of LDL from the body. However, conventional hemoperfusion merely focuses on LDL removal and does not address the symptom of plaque associated with AS. Based on the LDL binding properties of acrylated chondroitin sodium sulfate (CSA), acrylated beta-cyclodextrin (CD) and acrylic acid (AA), along with the anti-inflammatory property of rosiglitazone (R), the fabricated AA-CSA-CD-R microspheres could simultaneously release R and facilitate LDL removal for hemoperfusion. The AA and CSA offer electrostatic adsorption sites for LDL, while the CD provides hydrophobic adsorption sites for LDL and weak binding sites for R. According to the Sips model, the maximum static LDL adsorption capacity of AA-CSA-CD-R is determined to be 614.73 mg/g. In dynamic simulated perfusion experiments, AA-CSA-CD-R exhibits an initial cycle LDL adsorption capacity of 150.97 mg/g. The study suggests that the weakened inflammatory response favors plaque stabilization. The anti-inflammatory property of the microspheres is verified through an inflammation model, wherein the microsphere extracts are cocultured with mouse macrophages. Both qualitative analysis of iNOS\TNF-α and quantitative analysis of IL-6\TNF-α collectively demonstrate the remarkable anti-inflammatory effect of the microspheres. Therefore, the current study presents a novel blood purification treatment of eliminating pathogenic factors and introducing therapeutic factors to stabilize AS plaque.

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“…Synthetic textile dyes have a complex aromatic molecular structure that makes them difficult to break down when disposed of in the ecosystem [2], which makes necessary efforts to overcome these harmful effects. Many methods can be used, such as ion exchange [3], biodegradation [4], chemical coagulation [5], catalytic reduction [6], and adsorption [7].…”

Section: ■ Introductionmentioning

confidence: 99%

Comparison of the Adsorption Ability of MgAl-HC, CaAl-HC, and ZaAl-HC Composite Materials Based on Duku Peel Hydrochar in Adsorption of Direct Green Anionic Dyes

Juleanti

Normah²,

Siregar³

et al. 2022

Indones. J. Chem.

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Preparation of composite material from layered double hydroxide (LDH) with hydrochar (HC) from duku peel produces CaAl-HC, MgAl-HC, and ZnAl-HC have shown the success of the preparation process as evidenced by characterizations such as XRD and FT-IR. The XRD characterization data evidenced the typical diffraction of the hydrochar around 2θ = 20° in the composite material. FTIR analysis is a characterization that supports the success of composite materials, which showed the presence of typical vibrations of HC at 3245, 2931, and 1635 cm–1 contained in the composite spectrum. The application of MgAl-HC, CaAl-HC, and ZnAl-HC composites as adsorbents showed Qmax (adsorption ability) values of 94.340 mg/g, 128.205 mg/g, and 89.286 mg/g. Overall the adsorption process is endothermic with a positive enthalpy value, and a negative Gibbs free energy value indicates a spontaneous adsorption process. The isotherm model of MgAl-HC, CaAl-HC, and ZnAl-HC show that the Langmuir isotherm model is more dominant, as indicated by the R2 value closer to 1 which indicates that the adsorption process takes place in a monolayer.

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Fast and environmental-friendly approach towards uniform hydrogel particles with ultrahigh and selective removal of anionic dyes

Cited by 19 publications

References 73 publications

Preparation of Chitosan-Diatomite/Calcium Alginate Composite Hydrogel Beads for the Adsorption of Congo Red Dye

Preparation of Chitosan-Diatomite/Calcium Alginate Composite Hydrogel Beads for the Adsorption of Congo Red Dye

Simultaneous Rosiglitazone Release and Low-Density Lipoprotein Removal by Chondroitin Sodium Sulfate/Cyclodextrin/Poly(acrylic acid) Composite Adsorbents for Atherosclerosis Therapy

Comparison of the Adsorption Ability of MgAl-HC, CaAl-HC, and ZaAl-HC Composite Materials Based on Duku Peel Hydrochar in Adsorption of Direct Green Anionic Dyes

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