Behavior of γ-Al2O3-bonded-3-chloropropyltrimethoxysilane nanosorbent toward potential binding and removal of 4-nitroaniline and 2-amino-3-nitro-pyridine from water

Mahmoud, Mohamed E.; Abdou, Azza E.H.; Shehata, Aziza K.; Header, Heba M.; Hamed, Ezzat A.

doi:10.1016/j.molliq.2016.10.130

Cited by 12 publications

(4 citation statements)

References 37 publications

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“… No. Adsorbents Adsorption capacity Q max (mg g −1 ) References 1 Modified γ-Aluminum oxide (γ-Al 2 O 3 -Silane-Cl) 97.97 59 2 Polymeric adsorbent HJ-02 90.25 60 3 Magnetic biochar (MDFBC) 114 61 4 Spartina alterniflora activated carbon (SAAC) 719 62 5 Multiple functional nanocomposite (GQDs@Gem@FA-DLH) 65.6 63 6 Mesoporous materials MCM-48 90 This study …”

Section: Resultsmentioning

confidence: 99%

Applying MCM-48 mesoporous material, equilibrium, isotherm, and mechanism for the effective adsorption of 4-nitroaniline from wastewater

Ali

Harharah

Salih³

et al. 2023

Sci Rep

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In this work, the MCM-48 mesoporous material was prepared and characterized to apply it as an active adsorbent for the adsorption of 4-nitroaniline (4-Nitrobenzenamine) from wastewater. The MCM-48 characterizations were specified by implementing various techniques such as; scanning electron microscopy (SEM), Energy dispersive X-ray analysis (EDAX), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) surface area, pore size distribution (PSD), and Fourier transform infrared (FTIR). The batch adsorption results showed that the MCM-48 was very active for the 4-nitroaniline adsorption from wastewater. The adsorption equilibrium results were analyzed by applying isotherms like Langmuir, Freundlich, and Temkin. The maximum experimental uptake according to type I Langmuir adsorption was found to be 90 mg g−1 approximately. The Langmuir model with determination coefficient R2 = 0.9965 is superior than the Freundlich model R2 = 0.99628 and Temkin model R2 = 0.9834. The kinetic adsorption was investigated according to pseudo 1st order, pseudo 2nd order, and Intraparticle diffusion model. The kinetic results demonstrated that the regression coefficients are so high R2 = 0.9949, that mean the pseudo 2nd order hypothesis for the adsorption mechanism process appears to be well-supported. The findings of adsorption isotherms and kinetics studies indicate the adsorption mechanism is a chemisorption and physical adsorption process.

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Section: Resultsmentioning

confidence: 99%

Applying MCM-48 mesoporous material, equilibrium, isotherm, and mechanism for the effective adsorption of 4-nitroaniline from wastewater

Ali

Harharah

Salih³

et al. 2023

Sci Rep

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“…The PNA adsorption performance of the activated nanotubes was compared with that of other materials ( Table 5 ) [ 1 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 ]. Different adsorbents have distinct functional groups.…”

Section: Resultsmentioning

confidence: 99%

Efficient Removal of Hazardous P-Nitroaniline from Wastewater by Using Surface-Activated and Modified Multiwalled Carbon Nanotubes with Mesostructure

Liou,

Huang

2024

Toxics

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P-nitroaniline (PNA) is an aniline compound with high toxicity and can cause serious harm to aquatic animals and plants. Multiwalled carbon nanotubes (MWCNTs) are a multifunctional carbon-based material that can be applied in energy storage and biochemistry applications and semiconductors as well as for various environmental purposes. In the present study, MWCNTs (CO2–MWCNTs and KOH–MWCNTs) were obtained through CO2 and KOH activation. ACID–MWCNTs were obtained through surface treatment with an H2SO4–HNO3 mixture. Herein, we report, for the first time, the various MWCNTs that were employed as nanoadsorbents to remove PNA from aqueous solution. The MWCNTs had nanowire-like features and different tube lengths. The nanotubular structures were not destroyed after being activated. The KOH–MWCNTs, CO2–MWCNTs, and ACID–MWCNTs had surface areas of 487, 484, and 80 m2/g, respectively, and pore volumes of 1.432, 1.321, and 0.871 cm3/g, respectively. The activated MWCNTs contained C–O functional groups, which facilitate PNA adsorption. To determine the maximum adsorption capacity of the MWCNTs, the influences of several adsorption factors—contact time, solution pH, stirring speed, and amount of adsorbent—on PNA adsorption were investigated. The KOH–MWCNTs had the highest adsorption capacity, followed by the CO2–MWCNTs, pristine MWCNTs, and ACID–MWCNTs. The KOH–MWCNTs exhibited rapid PNA adsorption (>85% within the first 5 min) and high adsorption capacity (171.3 mg/g). Adsorption isotherms and kinetics models were employed to investigate the adsorption mechanism. The results of reutilization experiments revealed that the MWCNTs retained high adsorption capacity after five cycles. The surface-activated and modified MWCNTs synthesized in this study can effectively remove hazardous pollutants from wastewater and may have additional uses.

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“…For ANF, the peak at 3326 cm −1 represented the N–H bond, and the peak at 3294 cm −1 was assigned to the C–H elongation vibration of alkyne. The characteristic peaks of N–H and C–H in ANF‐PC are shifted compared to those in ANF due to the attraction of intramolecular hydrogen bonds or water molecules 31 . For ANF‐PC, a new characteristic peak appeared at 2121 cm −1 due to the C≡C bond, and the peak at 1487 cm −1 was attributed to the alkyl C–H bending vibration, the peak at 1614 cm −1 was caused by the stretching vibration of the C=C bond in the benzene ring.…”

Section: Resultsmentioning

confidence: 99%

“…The characteristic peaks of N-H and C-H in ANF-PC are shifted compared to those in ANF due to the attraction of intramolecular hydrogen bonds or water molecules. 31 For ANF-PC, a new characteristic peak appeared at 2121 cm À1 due to the C≡C bond, and the peak at 1487 cm À1 was attributed to the alkyl C-H bending vibration, the peak at 1614 cm À1 was caused by the stretching vibration of the C=C bond in the benzene ring. This indicated that ANF was successfully modified by 3-chloropropyne through covalent bonding interaction.…”

Section: Characterization Of Anf and Anf-pcmentioning

confidence: 99%

Grafting alkynyl groups on the surface of nano‐aramid fibers towards flame retardant thermoplastic polyurethane

Liu

Dong

Chen

et al. 2022

Polymers for Advanced Techs

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In this work, para‐aramid fibers were dispersed into para‐aramid nanofibers (ANF) by deprotonation process, and then modified by 3‐chloropropyne (PC) via covalent bonding interaction. The resultant nanofiber (ANF‐PC) as a flame retardant was blended with thermoplastic polyurethane (TPU) to obtain fire‐retardant TPU nanocomposites. The addition of 0.250 wt% ANF‐PC reduced the peak heat release rate, total heat release, total smoke release, and peak CO release rate of TPU by 47.7%, 31.5%, 16.4%, and 45.1%, respectively. The char yield of TPU/ANF‐PC0.250 was increased from 7.7% (TPU/ANF0.250) to 13.7%. The flame‐retardant effect of ANF‐PC in TPU composites can be attributed to its carbonization effect in the condensed phase, which increased the char yields and graphitization degree of char residue. In addition, the presence of ANF‐PC increased the tensile strength and breaking strain of TPU by 645% and 578% compared to untreated ANF, due to the improved dispersion state of ANF‐PC.

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Behavior of γ-Al2O3-bonded-3-chloropropyltrimethoxysilane nanosorbent toward potential binding and removal of 4-nitroaniline and 2-amino-3-nitro-pyridine from water

Cited by 12 publications

References 37 publications

Applying MCM-48 mesoporous material, equilibrium, isotherm, and mechanism for the effective adsorption of 4-nitroaniline from wastewater

Applying MCM-48 mesoporous material, equilibrium, isotherm, and mechanism for the effective adsorption of 4-nitroaniline from wastewater

Efficient Removal of Hazardous P-Nitroaniline from Wastewater by Using Surface-Activated and Modified Multiwalled Carbon Nanotubes with Mesostructure

Grafting alkynyl groups on the surface of nano‐aramid fibers towards flame retardant thermoplastic polyurethane

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