Enhanced adsorption properties of zirconium modified chitosan-zeolite nanocomposites for vanadium ion removal

Salehi, Samira; Alijani, Somayeh; Anbia, Mansoor

doi:10.1016/j.ijbiomac.2020.07.055

Cited by 49 publications

(17 citation statements)

References 64 publications

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“…On top of that, the range of the initial heavy metals will influence the fitting degree of the adsorption isotherm models. In a few adsorption studies, increasing the initial concentration of metal ions will change the adsorption behavior from monolayer to multilayer adsorption, which will change the well‐fitted adsorption models 4,61,124 …”

Section: Adsorption Parameters and Mechanisms Of Metal Ions Onto Bioc...mentioning

confidence: 99%

“…The investigation of kinetic models is important in defining the reaction pathway, mechanism of the whole reaction process, deciding the types of physicochemical interaction, mass transport and rate‐determining steps in the process. In most adsorption studies, the two most common models used are pseudo‐first order and pseudo‐second order 33,61,87 . Pseudo‐first order indicates that the adsorption occurs via physisorption in which there is weak force (van der Waals) present between the metal ions and the active functional group at the surface of the adsorbent.…”

Section: Adsorption Parameters and Mechanisms Of Metal Ions Onto Bioc...mentioning

confidence: 99%

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A review on preparation, surface enhancement and adsorption mechanism of biochar‐supported nano zero‐valent iron adsorbent for hazardous heavy metals

Awang

Salleh

Aziz

et al. 2022

J of Chemical Tech & Biotech

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Heavy metal pollution of water is a global concern, which adversely affects human health because of its resistance to biodegradation and thus its transmission in the food chain via bioaccumulation. Nano zerovalent iron (nZVI) is very effective for the removal of heavy metals and is cost effective in terms of production. However, the main problems of nZVI are agglomeration and ease of oxidation. Several stabilization materials have been implemented to limit the aggregation of nZVI, such as silica, activated carbon and biochar. In comparison, as a support material, biochar possesses a large surface area, high stability and strong adsorption capacity, as well as being obtainable from various types of materials. Thus, this work aims to establish the opportunities available on the use of biochar-supported nZVI in utilizing its ability to stabilize and immobilize the nZVI. This review also reports the preparation, modification and surface enhancement of biochar, nZVI and biochar-nZVI for practical use as adsorbents. This review shows that modifications of the nZVI surface can help in their stabilization and reduction of aggregation. Additionally, this review is able to increase one's understanding of heavy metal sorption behavior by biochar-supported nZVI as it is the important as heavy metal sorption is driven based on biochar-nZVI type and heavy metal species which involve numerous mechanisms, including physical binding, complexation, ion exchange, surface precipitation and electrostatic interactions. Furthermore, this research reviews the adsorption parameters, including the crucial adsorption mechanism of heavy metals onto biochar-nZVI; the reusability of the biochar-nZVI is also discussed in this work.

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Section: Adsorption Parameters and Mechanisms Of Metal Ions Onto Bioc...mentioning

confidence: 99%

Section: Adsorption Parameters and Mechanisms Of Metal Ions Onto Bioc...mentioning

confidence: 99%

A review on preparation, surface enhancement and adsorption mechanism of biochar‐supported nano zero‐valent iron adsorbent for hazardous heavy metals

Awang

Salleh

Aziz

et al. 2022

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…(2) Adsorption isotherm fitting: Langmuir and Freundlich models were used to fit the adsorption process of Cu 2+ . The isotherm model equations [24] are shown in Equations ( 5) and (6), respectively:…”

Section: The Data Analysismentioning

confidence: 99%

“…It is simple in operation, low in application cost and good in treatment effect, so it is widely used to remove heavy metal pollution in water. The core of adsorption method lies in the selection of adsorbent, and high-quality adsorbent can reduce the initial investment and operating cost of the treatment process and improve the treatment effect [6].…”

Section: Introductionmentioning

confidence: 99%

Study on the Performance of Composite Adsorption of Cu2+ by Chitosan/β-Cyclodextrin Cross-Linked Zeolite

Xiong

Zhang

2022

Sustainability

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In order to remove Cu2+ from wastewater, a kind of microsphere adsorbent (SCDO) with high efficiency for Cu2+ adsorption was prepared by the microdrop condensation method, where chitosan (CTS) and sodium alginate (SA) were used as the matrix to crosslink β-cyclodextrin (β-CD) and zeolite (Zeo). The structure and properties of SCDO were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Upon that, the adsorption performance of SCDO for Cu2+ was studied, in which the effects of pH, initial concentration, dosage, adsorption time and temperature were investigated. The results showed that the removal rate of Cu2+ reached 97.08%, and the maximum adsorption capacity was 24.32 mg/g with the temperature at 30 °C, the dosage of SCDO at 12 g/L, the initial concentration of Cu2+ at 100 mg/L, the pH of the solution at 6.0 and the adsorption time at 120 min, respectively. The adsorption process of Cu2+ by SCDO occurred in accordance with quasi-second-order kinetics model and Langmuir adsorption isotherm. After four repeats of continuous adsorption and desorption, the regenerative removal rate of Cu2+ could still reach 84.28%, which indicated that SCDO had outstanding reusability.

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“…The principal bonds in the IR spectra of chitosan (Fig. 1 (b)) can be seen as follows [44]: a broad and strong overlapped band at around 3446cm -1 (O-H and N-H stretch); a weak band at 2873 cm -1 (C-H stretch), 1645cm -1 (N-H bending vibration), 1386cm -1 (-C-O stretching of the primary alcoholic group), 1083 cm -1 (C-O stretching vibrations) [45,46,36,47]. According to Liang's studies [48], the adsorption of chitosan molecules on the surfaces of iron nanoparticles causes considerable changes in the tensile frequency of the chitosan functional groups.…”

Section: Physicochemical Characterization Of Adsorbentsmentioning

confidence: 99%

Fabrication of Nano Zero valent Iron/Biopolymer Composite with Antibacterial Properties for Simultaneous Removal of Nitrate and Humic Acid: Kinetics and Isotherm Studies

2021

Self Cite

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This investigation compared the adsorption behavior of humic acid (HA) on cellulose, chitosan and nano zerovalent iron/chitosan (nZVI/chitosan). Results show that nZVI/chitosan is very effective in the adsorption of HA from aqueous media. The feasibility of using nZVI/chitosan as an adsorbent for the simultaneous removal of nitrate and HA from aqueous media was also studied.Structural analyses of the samples were identified by TEM, FT-IR, EDX, XRD and N2 isotherms.The effects of pH, amount of composite, nitrate concentration, HA concentration and contact time and their interactions on responses were explored by central composite design (CCD) and response surface methodology (RSM). The optimal conditions of pH (5.5), adsorbent amount (0.098 g), reaction time (27 min) and initial concentrations (110 mg/L for nitrate and 30 mg/L for HA) were obtained from desirability function. The adsorption properties of the resulting nanocomposite toward nitrate and HA were investigated through kinetic and isotherm adsorption studies. The adsorption kinetics was found to fit the pseudo-second order model. The results obtained indicate that nitrate uptake fitted well with the Langmuir model while the Freundlich isotherm was the best model for describing the multilayer uptake of HA from aqueous solutions. Moreover, nZVI/chitosan nanocomposite illustrates a very high antibacterial activity against pathogen bacteria strains such as Staphylococcus aureus ATCC 25935, ATCC 25923, and Pseudomonas aeruginosa ATCC 27853. The findings reported in this investigation highlight the potential of using nZVI/chitosan as a promising adsorbent for the simultaneous removal of nitrate and HA from aqueous solutions.

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Enhanced adsorption properties of zirconium modified chitosan-zeolite nanocomposites for vanadium ion removal

Cited by 49 publications

References 64 publications

A review on preparation, surface enhancement and adsorption mechanism of biochar‐supported nano zero‐valent iron adsorbent for hazardous heavy metals

A review on preparation, surface enhancement and adsorption mechanism of biochar‐supported nano zero‐valent iron adsorbent for hazardous heavy metals

Study on the Performance of Composite Adsorption of Cu2+ by Chitosan/β-Cyclodextrin Cross-Linked Zeolite

Fabrication of Nano Zero valent Iron/Biopolymer Composite with Antibacterial Properties for Simultaneous Removal of Nitrate and Humic Acid: Kinetics and Isotherm Studies

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