Nanodiamond-filled chitosan as an efficient adsorbent for anionic dye removal from aqueous solutions

Raeiszadeh, Milad; Hakimian, Alireza; Shojaei, Akbar; Molavi, Hossein

doi:10.1016/j.jece.2018.05.005

Cited by 76 publications

(17 citation statements)

References 60 publications

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“…The UND and OND were fully characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy, and zeta potential analyses, the results of which are shown in Figures S1–S5, and more details are described elsewhere. , Briefly, the results obtained from FTIR spectroscopy (Figure S1), zeta potential (Figure S5a), and Boehm titration (Figure S5b) indicated that the amount of carboxylic acid functional groups on the surface of the thermally OND increases with increasing the thermal oxidation duration. This contributes to the improvement of the adsorption capacity of MB and adsorption selectivity over MO which is due to increment of the interaction via cationic MB dye and adsorbents with negative charges …”

Section: Resultsmentioning

confidence: 99%

“…To determine the favorability of the adsorption process, the equilibrium parameter ( R L ) is calculated using the following equation where K L (L/mg) is the Langmuir constant and C 0 (mg/L) is the initial concentration of dyes. , The calculated R L value indicates whether the adsorption systems show linear adsorption ( R L = 1), irreversible adsorption ( R L = 0), favorable adsorption (0 < R L < 1), or unfavorable adsorption ( R L > 1). All the calculated values of R L were found to be in the range of 0–1, which indicates the favorable adsorption of MO onto the UND and MB onto the OND, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Adsorption separation is worth noticing as an attractive technique for removal of organic dyes from wastewater because of its many advantages such as low cost, simplicity of design, simple operation, operation at ambient temperature and pressure, insensitivity to toxic pollutants, and environment-friendly nature. − Recently, many kinds of solid adsorbent such as graphene, graphene oxide, zeolite, metal–organic frameworks, carbon nanotube, layered double hydroxides, and mesoporous materials have been reported in the field of dye-selective adsorption. ,− …”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on the Influence of Initial pH, Ionic Strength, and Temperature on the Selective Adsorption of Dyes onto Nanodiamonds

2019

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In the current work, the performance of untreated nanodiamonds (UNDs) and thermally oxidized nanodiamonds (ONDs), as adsorbents for selective adsorption of methylene blue (MB) and methyl orange (MO) from aqueous media, was examined. The adsorption isotherm, initial pH, ionic strength, and thermodynamic study were investigated in batch experiments. The equilibrium adsorption data were analyzed by Langmuir and Freundlich isotherm models, which indicated that the isotherms were well fitted with the Langmuir model for both dyes. Thermodynamic parameters indicated that the adsorption operation was a feasible, spontaneous, and physisorption process in experimental conditions. Meanwhile, the adsorption of MO onto the UND was exothermic and determined by enthalpy change, while the adsorption of MB onto the OND was endothermic and an entropy-controlling process. The adsorption selectivity study exhibited that OND can rapidly and selectively separate cationic MB dye from the MO and MB mixture. On the basis of the negatively charged surface of the OND with highly negative zeta potential, the fact that the OND opted to adsorb MB over MO was firmly dependent on the initial pH value and ionic strength, which suggested that the possible mechanism of adsorption such as electrostatic interaction, hydrogen bonding, and π−π stacking might be important. Finally, based on the mentioned considerations, thermally OND was an attractive candidate for rapid adsorption and separation of cationic dyes from aqueous solution.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental Study on the Influence of Initial pH, Ionic Strength, and Temperature on the Selective Adsorption of Dyes onto Nanodiamonds

2019

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“…The linear fitting results are depicted in Figure , and the relevant parameters (K 1 , K 2 , K id , and the correlation coefficient R 2 ) were listed in Table . According to the Figure , and the correlation coefficients (R 2 ) given in Table , it is obvious that the pseudo‐second‐order kinetic model is very appropriate to predict the adsorption behavior of the synthesized MOFs for adsorption of MTX and CUR drugs, and indicate that the present adsorption process is nearly chemisorption …”

Section: Resultsmentioning

confidence: 94%

“…According to the Figure 2, and the correlation coefficients (R 2 ) given in Table 1, it is obvious that the pseudo-second-order kinetic model is very appropriate to predict the adsorption behavior of the synthesized MOFs for adsorption of MTX and CUR drugs, and indicate that the present adsorption process is nearly chemisorption. [29][30][31][32]…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Zr‐Based MOFs with High Drug Loading for Adsorption Removal of Anti‐Cancer Drugs: A Potential Drug Storage

Molavi

Moghimi

Taheri

2020

Applied Organom Chemis

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A robust and highly water stable series of UiO‐66‐drived MOFs including UiO‐66‐NH2, glycidyl methacrylate functionalized UiO‐66‐NH2 (UiO‐66‐GMA) and ethylenediamine functionalized UiO‐66‐NH2 (UiO‐66‐EDA) were synthesized solvothermally and studied their adsorption performances toward two anti‐cancer drugs, methotrexate (MTX) and curcumin (CUR) in the case of overdose. It was found that functionalizing the surface of UiO‐66‐NH2 nanoparticles with different functional groups remarkably changes the adsorption capacity and the ideal adsorption selectivity of MTX over CUR. Particularly, the UiO‐66‐EDA exhibited the highest adsorption capacities for both drugs, 540.78 and 423.85 mg/g for MTX and CUR, respectively, because of the strong interaction between drug molecules and adsorbent via hydrogen bonding due to the existence of different polar functional groups. The kinetics of drugs adsorption was investigated by three well‐known kinetic models, which the output indicates that the adsorption of both drugs onto the synthesized MOFs follow the pseudo‐second‐order model. Moreover, it was found that the equilibrium adsorption results were well fitted with the Langmuir isotherm models, revealing that the adsorption of both drugs onto the synthesized MOFs is a monolayer adsorption process. Further investigation illustrated that the synthesized MOFs could be easily activated and reused after four successive adsorption–desorption cycles. The output of the present work is of main important for biomedical and environmental applications of MOFs as an outstanding adsorbent for adsorption removal of hazardous drugs from contaminated aqueous solutions.

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Metal‐Organic Frameworks and Electrospinning: A Happy Marriage for Wastewater Treatment

Ahmadijokani

Molavi

Bahi

et al. 2022

Adv Funct Materials

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118

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Metal-organic frameworks (MOFs), an emerging class of porous organic-inorganic hybrid materials, have shown great potential for water and wastewater treatment applications. However, pure MOF powders have limited practical applications in water treatment due to their insolubility, poor processability, brittleness, safety hazard from dust formation, and difficult separation from aqueous solutions. Thus, exploring potential MOFs composites with improved separation performance is of great importance. The marriage of MOFs with electrospun nanofiber with forethought into the final product's morphology, structure, and chemistry has opened up new opportunities for efficient wastewater treatment. The present review exhaustively summarizes the strategies to integrate MOFs into nanofibers via electrospinning to remove various pollutants (i.e., organic dyes, heavy metal ions, pharmaceuticals, personal care products, oily compounds, organic solvents, etc.) via adsorption, photodegradation, and membrane filtration. Besides, the most recent advances of electrospun MOF nanofibers for wastewater treatment and their current challenges and future outlook are delineated.

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Nanodiamond-filled chitosan as an efficient adsorbent for anionic dye removal from aqueous solutions

Cited by 76 publications

References 60 publications

Experimental Study on the Influence of Initial pH, Ionic Strength, and Temperature on the Selective Adsorption of Dyes onto Nanodiamonds

Experimental Study on the Influence of Initial pH, Ionic Strength, and Temperature on the Selective Adsorption of Dyes onto Nanodiamonds

Zr‐Based MOFs with High Drug Loading for Adsorption Removal of Anti‐Cancer Drugs: A Potential Drug Storage

Metal‐Organic Frameworks and Electrospinning: A Happy Marriage for Wastewater Treatment

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