A novel chitosan–vanadium-titanium-magnetite composite as a superior adsorbent for organic dyes in wastewater

Zhang, Wei; Lan, Yingying; Ma, Mengting; Chai, Senyou; Zuo, Qiting; Kim, Ki‐Hyun; Y, Gao

doi:10.1016/j.envint.2020.105798

Cited by 68 publications

(24 citation statements)

References 53 publications

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“…The comparison for removal of Cr(VI) by different materials from an aqueous solution is shown in Table 4. Compared with the prepared Chitosan-FeO nanoparticles, nZVI-multiwalled carbon nanotube, ZVMg, and modified brown algae, Sargassum bevanom, the removal performance of Cr(VI) by the Mxene-CS in this study is partly restricted, probably attributed to the relatively weak combination between the Mxene and CS at the certain molar ratio [24]. To expand its practical application in the actual wastewater, varying molar ratios of Mxene to CS on synthesizing of the novel composite are recommendable.…”

Section: Effect Of Phmentioning

confidence: 70%

“…What is more, the hydroxyl group or amino group in the CS molecular would be beneficial to remove other pollutants for it can form into a hydrogen bond with a dye molecule (containing a -N=N-structure) or combine with the heavy metal ions under certain conditions [23]. However, the CS is not structurally stable under the acidic pH condition for it would degrade slowly in the acid solution, resulting in a decrease in the viscosity and molecular weight of the CS [24]. Therefore, the application of CS in the wastewater is obviously restricted for its unstable structure, while we should pay more attention to improve the stability of the CS and correspondingly increase its removal performance of pollutants from wastewater [25].…”

Section: Introductionmentioning

confidence: 99%

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Green Synthesis of A Novel MXene–CS Composite Applied in Treatment of Cr(VI) Contaminated Aqueous Solution

Wan

Geng

et al. 2021

Processes

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The considerable amount of Cr(VI) pollutants in the aqueous environment is a significant environmental concern that cannot be ignored. A series of novel Mxene–CS inorganic–organic composite nanomaterials synthesized by using the solution reaction method was applied to treat the Cr(VI) contaminated water. The Mxene–CS composites were characterized through SEM (scanning electron microscope), XRD (X–ray diffraction), XPS (X–ray photoelectron spectroscopy), and FTIR (Fourier transform infrared). The XRD patterns (observed at 2θ of 18.1°, 35.8°, 41.5°, and 60.1°) and the FT–IR spectra (-NH2 group for 1635 and 1517 cm−1, and -OH group for 3482 cm−1) illustrated that CS was successfully loaded on the Mxene. The effects of solution pH, the dosage of Mxene–CS, and duration time on the adsorption of Cr(VI) by synthesized Mxene–CS were investigated. The removal efficiency of Cr(VI) was increased from 12.9% to 40.5% with Mxene–CS dosage ranging from 0.02 to 0.12 g/L. The adsorption process could be well fitted by the pseudo–second–order kinetics model, indicating chemisorption occurred. The Langmuir isotherm model could be better to describe the process with a maximum adsorption capacity of 43.1 mg/g. The prepared novel Mxene–CS composite was considered as an alternative for adsorption of heavy metals from wastewater.

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Section: Effect Of Phmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Green Synthesis of A Novel MXene–CS Composite Applied in Treatment of Cr(VI) Contaminated Aqueous Solution

Wan

Geng

et al. 2021

Processes

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“…To further explore the adsorption mechanism of CBZ by the MCNTs, the adsorption isotherm study results for the CBZ adsorption process were shown in Figure 1 with the model fitting parameters summarized in the Supplementary Materials, Table S2. The adsorption isotherms were studied by the Langmuir and Freundlich models [33], which can be described by Equations (8) and (9), respectively.…”

Section: Adsorption Model Investigationmentioning

confidence: 99%

The Potential for PE Microplastics to Affect the Removal of Carbamazepine Medical Pollutants from Aqueous Environments by Multiwalled Carbon Nanotubes

Sheng

Wang

Zhang

et al. 2021

Toxics

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Microplastics are ubiquitous in aquatic environments and interact with other kinds of pollutants, which affects the migration, transformation, and fate of those other pollutants. In this study, we employ carbamazepine (CBZ) as the contaminant to study the influence of polyethylene (PE) microplastics on the adsorption of CBZ pollutants by multiwalled carbon nanotubes (MCNTs) in aqueous solution. The adsorption capacity of CBZ by MCNTs in the presence of PE microplastics was obviously lower than that by MCNTs alone. The influencing factors, including the dose of microplastics, pH, and CBZ solution concentration, on the adsorption of CBZ by MCNTs and MCNTs−PE were thoroughly investigated. The adsorption rate of CBZ by MCNTs decreased from 97.4% to 90.6% as the PE microplastics dose increased from 2 g/L to 20 g/L. This decrease occurred because the MCNTs were coated on the surface of the PE microplastics, which further decreased the effective adsorption area of the MCNTs. This research provides a framework for revealing the effect of microplastics on the adsorption of pollutants by carbon materials in aqueous environments.

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“…Vanadium and vanadium compounds are commonly used in industry as a drying agent in paints, as a photographic developer, and is also used in black dyes, inks, or pigments for textiles, ceramics, and printing [ 34 , 35 , 36 ]. Due to its electron reduction potential, it is also used in vanadium redox flow batteries in electrochemical storage systems [ 37 ].…”

Section: Introductionmentioning

confidence: 99%

A Study of Vanadate Group Substitution into Nanosized Hydroxyapatite Doped with Eu3+ Ions as a Potential Tissue Replacement Material

Nowak

Wiglusz

2021

Nanomaterials

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In this study, nanosized vanadate-substituted hydroxyapatites doped with 1 mol% and 2 mol% Eu3+ ions were obtained via the precipitation method. To evaluate the structure and morphology of the obtained compounds, the XRPD (X-ray powder diffraction) technique, Rietveld refinement, SEM-EDS (scanning electron microscopy-energy-dispersive spectrometry) and TEM (transmission electron microscopy) techniques as well as FTIR (Fourier transform infrared) spectroscopy were performed. Moreover, the chemical formula was confirmed using the ICP-OES (Inductively coupled plasma optical emission spectroscopy spectroscopy). The calculated average grain size for powders was in the range of 25 to 90 nm. The luminescence properties of vanadium-substituted hydroxyapatite were evaluated by recording emission spectra and excitation spectra as well as luminescence kinetics. The crucial step of this research was the evaluation of the biocompatibility of the synthesized nanomaterials. Therefore, the obtained compounds were tested toward sheep red blood cells and normal human dermal fibroblast to confirm the nontoxicity and biocompatibility of new nanosized Eu3+ ion-doped vanadate-hydroxyapatite. Moreover, the final step of the research allowed us to determine the time dependent ion release to the simulated body fluid environment. The study confirmed cytocompatibility of vanadium hydroxyapatite doped with Eu3+ ions.

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A novel chitosan–vanadium-titanium-magnetite composite as a superior adsorbent for organic dyes in wastewater

Cited by 68 publications

References 53 publications

Green Synthesis of A Novel MXene–CS Composite Applied in Treatment of Cr(VI) Contaminated Aqueous Solution

Green Synthesis of A Novel MXene–CS Composite Applied in Treatment of Cr(VI) Contaminated Aqueous Solution

The Potential for PE Microplastics to Affect the Removal of Carbamazepine Medical Pollutants from Aqueous Environments by Multiwalled Carbon Nanotubes

A Study of Vanadate Group Substitution into Nanosized Hydroxyapatite Doped with Eu3+ Ions as a Potential Tissue Replacement Material

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