Adsorptive removal of p-nitroaniline from aqueous solution by bamboo charcoal: kinetics, isotherms, thermodynamics, and mechanisms

Guang-qian, WU; Wu, Guannan; Zhang, Qisheng

doi:10.1080/19443994.2016.1164084

Cited by 6 publications

(3 citation statements)

References 31 publications

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“…The combination of H 2 TPP or ZnTPP with PES electrospun mats resulted in the effective removal of p-NA from water. Both adopted fabrication approaches confirmed the role of porphyrins in p-NA immobilization on PES surfaces with respect to bare PES mats, but further investigations are required to improve the adsorption capacity in order to have a reliable comparison with other adsorbents [4,5,6,7,8,9,54]. XPS analysis confirmed the presence of p-NA on the fiber surfaces: due to the sampling depth of this technique (limited to a few nanometers), no significant differences between the surface compositions of H 2 TPP/PES and ZnTPP/PES mats were detected.…”

Section: Discussionmentioning

confidence: 87%

“…p-NA is resistant to chemical and biological oxidation degradation due to the presence of a nitro group linked to the aromatic ring. Therefore, the development of cost-effective membranes able to adsorb p-NA from aqueous solutions represents an alternative strategy to other treatments for wastewater purification (e.g., advanced oxidation processes, extraction, or biodegradation), and from this perspective, different types of adsorbents have been investigated and utilized to remove p-NA [4,5,6,7,8,9]. Recently, electrospun fibrous mats composed of a wide variety of polymers have been successfully applied in various fields, such as nanocatalysis [10,11,12], filtration [13,14,15,16], healthcare [17,18,19], biotechnology [20,21,22], security, and environmental control [23,24,25,26].…”

Section: Introductionmentioning

confidence: 99%

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Polyethersulfone Mats Functionalized with Porphyrin for Removal of Para-nitroaniline from Aqueous Solution

et al. 2019

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The dispersion of para-nitroaniline (p-NA) in water poses a threat to the environment and human health. Therefore, the development of functional adsorbents to remove this harmful compound is crucial to the implementation of wastewater purification strategies, and electrospun mats represent a versatile and cost-effective class of materials that are useful for this application. In the present study, we tested the ability of some polyethersulfone (PES) nanofibers containing adsorbed porphyrin molecules to remove p-NA from water. The functional mats in this study were obtained by two different approaches based on fiber impregnation or doping. In particular, meso-tetraphenyl porphyrin (H2TPP) or zinc(II) meso-tetraphenyl porphyrin (ZnTPP) were immobilized on the surface of PES fiber mats by dip-coating or added to the PES electrospun solution to obtain porphyrin-doped PES mats. The presence of porphyrins on the fiber surfaces was confirmed by UV–Vis spectroscopy, fluorescence measurements, and XPS analysis. p-NA removal from water solutions was spectrophotometrically detected and evaluated.

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Section: Discussionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Polyethersulfone Mats Functionalized with Porphyrin for Removal of Para-nitroaniline from Aqueous Solution

et al. 2019

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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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Introduction

Huang¹

2019

Application of Bamboo in Building Envelope

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Adsorptive removal of p-nitroaniline from aqueous solution by bamboo charcoal: kinetics, isotherms, thermodynamics, and mechanisms

Cited by 6 publications

References 31 publications

Polyethersulfone Mats Functionalized with Porphyrin for Removal of Para-nitroaniline from Aqueous Solution

Polyethersulfone Mats Functionalized with Porphyrin for Removal of Para-nitroaniline from Aqueous Solution

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

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