Environmental protection by the adsorptive elimination of acetaminophen from water: A comprehensive review

Igwegbe, Chinenye Adaobi; Aniagor, Chukwunonso O.; Oba, Stephen N.; Yap, Pow‐Seng; Iwuchukwu, Felicitas U.; Liu, Tianqi; Souza, Elias Costa de; Ighalo, Joshua O.

doi:10.1016/j.jiec.2021.08.015

Cited by 56 publications

(19 citation statements)

References 161 publications

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“…One of the most important aspects to consider when evaluating an adsorbent's uptake efficiency is its regeneration. In real‐world applications, how to reuse and recycle spent adsorbents thus maintaining a constant adsorption intensity is critical 140. Methanol, acetone, acetic acid solution etc., were used for the desorption of CBZ (as summarized in Tab.…”

Section: Carbamazepine Desorption and Adsorbent Reusabilitymentioning

confidence: 99%

Recent Advances on the Aqueous Phase Adsorption of Carbamazepine

et al. 2022

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Carbamazepine (CBZ) is a pharmaceutical compound used in medical practice. Due to the ecotoxicological risk of its presence in the aqueous environment, researchers have been investigating its removal by adsorption technique. The aim of this study is to review the works done on the removal of CBZ from water by adsorption. Carbon‐based materials were the best types of adsorbent for CBZ uptake (> 200 mg g−1). Molecularly imprinted polymer (MIP) and carbon nanotubes (CNTs) showed especially good adsorption capacities. The key mechanisms of CBZ adsorption were π‐π interaction, electrostatic interactions, hydrogen‐bonding and hydrophobic interactions. Classical equilibrium isotherm models like Langmuir and Freundlich were always best‐fits and kinetics modelling was best‐fit to the pseudo‐second order model. The thermodynamics modelling of CBZ adsorption showed it was spontaneous and endothermic for most adsorbents. Methanol and acetone were especially effective for the desorption of CBZ from adsorbents and can achieve > 90 % removal even after 4–5 cycles. CBZ competes favorably in adsorption systems with other pharmaceutical species due to the advantages of the hydrophobic effect and molecular size.

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Section: Carbamazepine Desorption and Adsorbent Reusabilitymentioning

confidence: 99%

Recent Advances on the Aqueous Phase Adsorption of Carbamazepine

et al. 2022

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“…The nature of the molecule itself is the most significant factor dictating the mechanism of MO adsorption and thereafter the composition of the adsorbent material. The actual physicochemical mechanisms governing the adsorptive absorption can be better understood by studying the chemical properties of the adsorbent and adsorbate . MO is a polycyclic aromatic molecule, and it can interact with adsorbents that have varying degrees of aromaticity through electron donor–acceptor (EDA) interactions.…”

Section: Resultsmentioning

confidence: 99%

Effective Removal of Carcinogenic Azo Dye from Water Using Zea mays-Derived Mesoporous Activated Carbon

Mohamed,

El-Aassar,

Ibrahim

et al. 2024

ACS Omega

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Addressing industrial wastewater treatment challenges and removing hazardous organic pollutants, such as carcinogenic methyl orange (MO) and azo dyes, is a pressing concern. This study explores the use of the Zea mays envelope, an agricultural waste product, to produce Z. mays activated carbon (ZMAC) through the chemical activation of maize envelopes with phosphoric acid. Various analytical techniques, including FTIR, XRD, TGA, DSC, and SEM, characterize ZMAC. Results show that ZMAC exhibits an impressive monolayer adsorption capacity of 66.2 mg/g for MO. The Langmuir isotherm model fits the experimental data well, indicating monolayer coverage of the MO on the ZMAC surface. The pH-sensitive adsorption process demonstrates an optimal removal efficiency at pH 4. ZMAC follows the pseudo-second-order kinetic model, and diffusion rate constant analysis identifies three consecutive stages in the adsorption process. Moreover, the uptake of MO ions by ZMAC is identified as an exothermic and spontaneous process. Reusability tests demonstrate efficient regeneration of ZMAC up to five times with 1 mL of 2 M HNO 3 in each cycle, without sorbent mass loss. Thermodynamic analysis shows an increase in the uptake capacity from 66.2 to 73.2 mg/g with temperature elevation. This study offers practical solutions for industrial wastewater treatment challenges, providing an environmentally sustainable and effective approach to mitigate the risks associated with hazardous organic pollutants.

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“…However, in the pH range studied during the photocatalytic degradation tests, the acetaminophen molecule was present in the neutral form (ACE 0 ); thus, the influence of electrostatic interaction between the ACE 0 molecule and the surface of the photocatalyst seems to have a low impact on the adsorption step required for approaching the surface where the reactions preferably take place. Other interactions described for ACE with the solid include π-π and hydrogen bonds [ 57 ], which would explain why the optimum results reached pH = 4–5, i.e., around the circumneutral conditions for surface charge (pH pzc ).…”

Section: Resultsmentioning

confidence: 99%

Boosted Activity of g-C3N4/UiO-66-NH2 Heterostructures for the Photocatalytic Degradation of Contaminants in Water

Solís

Quintana

Martín-Lara

et al. 2022

IJMS

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The combination of graphitic carbon nitride and the metal-organic framework UiO-66-NH2 has been developed with the aim to enhance the photocatalytic activity of pure semiconductors. Different proportions of g-C3N4 and UiO-66-NH2 were combined. Complete characterization analysis of the resulting photocatalytic materials was conducted, including N2 adsorption isotherms, XRD, FTIR, STEM-EDX microscopy, DRS-UV-visible, and photoluminescence. The photocatalytic activity was tested in an aqueous solution for the removal of acetaminophen as the target pollutant. From the obtained results, less than 50% of UiO-66-NH2 incorporated in the g-C3N4 structure enhanced the photocatalytic degradation rate of both bare semiconductors. Concretely, 75% of g-C3N4 in the final g-C3N4/UiO-66-NH2 heterostructure led to the best results, i.e., complete acetaminophen elimination initially at 5 mg·L−1 in 2 h with a pseudo-first order rate constant of ca. 2 h−1. The presence of UiO-66-NH2 in the g-C3N4 enhanced the optoelectronic properties, concretely, the separation of the photo-generated charges was improved according to photoluminescence characterization. The better photo-absorption uptake was also confirmed by the determination of the quantum efficiency values of the heterostructure if compared to either pure g-C3N4 or UiO-66-NH2. This photocatalyst with the best activity was further tested at different pH values, with the best degradation rate at a pH close to the pHpzc ~4.15 of the solid. Sequential recycling tests demonstrated that the heterostructure was stable after five cycles of use, i.e., 15 h. A high contribution of photo-generated holes in the process of the degradation of acetaminophen, followed marginally by superoxide radicals, was suggested by scavenger tests.

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Environmental protection by the adsorptive elimination of acetaminophen from water: A comprehensive review

Cited by 56 publications

References 161 publications

Recent Advances on the Aqueous Phase Adsorption of Carbamazepine

Recent Advances on the Aqueous Phase Adsorption of Carbamazepine

Effective Removal of Carcinogenic Azo Dye from Water Using Zea mays-Derived Mesoporous Activated Carbon

Boosted Activity of g-C3N4/UiO-66-NH2 Heterostructures for the Photocatalytic Degradation of Contaminants in Water

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