Enhanced adsorptive removal of diclofenac sodium from aqueous solution by bentonite-supported nanoscale zero-valent iron

Sulaiman, Saleh; Al-Jabari, Mohammed H.

doi:10.1080/25765299.2021.1878655

Cited by 22 publications

(7 citation statements)

References 53 publications

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“…All in all, the removal of all targeted compounds in our study was maximized at the lower pH value investigated (pH = 3), which may be attributed to adsorption via electrostatic interactions. The reason is that the pKa of all targeted NSAIDs ranges between 4.14 and 4.59; thus, at lower pH values, those compounds that are characterized as weak acids are neutrally charged and, at higher pH values, they exist in the anionic form [82], whereas resin and nZVI has a positive surface charge at pH values < 7 [85,86]. Other mechanisms of adsorption, such as hydrophobic interactions, π-cation interaction, and hydrogen bonding in combination with Fenton reactions in the presence of oxygen and nZVI may be also responsible for the removal rates obtained.…”

Section: Discussionmentioning

confidence: 99%

Assessing the Performance of Environmentally Friendly-Produced Zerovalent Iron Nanoparticles to Remove Pharmaceuticals from Water

et al. 2021

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Nano zerovalent iron (nZVI), produced from green tea extracts, was incorporated in a cation exchange resin (R-nFe) to investigate its performance regarding the removal of four non-steroidal anti-inflammatory drugs (NSAIDs): ibuprofen (IBU), naproxen (NPX), ketoprofen (KTP) and diclofenac (DCF). The effect of contact time, NaCl pretreatment, pH, R-nFe dose, the role of the supporting material, the initial concentration of pollutants, and the combined effect of nZVI with oxidative reagents was assessed through a series of batch experiments. According to the results, the best removal efficiencies obtained for DCF and KTP were 86% and 73%, respectively, at 48 h of contact time with NaCl pretreated R-nFe at a dose of 15 g L−1 and a pH of 4. The maximum removal efficiency for NPX was 90% for a contact time of 60 min with PS 1 mM and a pH of 3, which was quite similar to the experiment with a greater contact time of 48 h without PS addition. The maximum IBU removal was 70%; this was reached at pH 3, with a contact time of 30 min and R-nFe 15 g L−1. To the authors’ best knowledge, this is the first study investigating the utilization of nZVI, produced from leaf extracts and incorporated into a cationic exchange resin, to remove NSAIDs from water.

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Section: Discussionmentioning

confidence: 99%

Assessing the Performance of Environmentally Friendly-Produced Zerovalent Iron Nanoparticles to Remove Pharmaceuticals from Water

et al. 2021

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“…The concentrations of DCF in the feed and permeate were analyzed by UV‐vis spectroscopy at λ = 275 nm. The percentage removal of DCF was determined as follows 34:

true R (%) = \frac{(C_{i} - C_{p})}{C_{normali}} \times 100

…”

Section: Methodsmentioning

confidence: 99%

Separation of Diclofenac Sodium Using Polysulfone Membranes Incorporated with Manganese Nanoparticles

et al. 2023

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Membranes are employed in various applications, including pharmaceutical waste separation, owing to their operability, high removal capacity, and cost‐effectiveness. However, membrane fouling is an influential factor that reduces their efficiency. Since the addition of hydrophilic inorganic components has been shown to reduce membrane fouling, the present work focuses on manganese (MnO2, Mn2O3) nanoparticles (NP) in polysulfone (PSF) casting solutions to prepare mixed‐matrix membranes for separating diclofenac (DCF) sodium from an aqueous solution. The membranes were characterized using microscopic and spectroscopic techniques, thermogravimetric analysis, and by elucidating the internal membrane specific area, contact angle, and mechanical properties. The synthesized NP were characterized by X‐ray diffraction and transmission electron microscopy analysis. The concentrations of DCF sodium measured in the feed and filtrate solutions showed that the PSF/Mn2O3 membrane provided the highest permeate flux with good DCF removal of 98.4 %. Mechanical testing indicated that higher tensile strength was obtained when embedding MnO2 NP in the PSF membrane matrix. Contact angle measurements showed an improvement of the surface hydrophilicity when blending the PSF casting solution with MnO2 NP. The fouling test indicated that the PSF/Mn2O3 membrane provided the best antifouling properties. Thus, NP addition enhanced the porosity, antifouling characteristics, hydrophilicity, and water flux of the fabricated membranes.

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“…As an alternative, the use of Fe 0 or Fe(II) for the removal of these type of contaminants in water was addressed by several authors through the use of nanoscale zerovalent iron (nZVI) particles as reducing agents − or also through the use of engineered iron materials for photoreduction of Cr(VI) to Cr(III). , The advantage of the latter is that the nanocomposites used as photocatalyst materials are very efficient in Cr(VI) removal and they can be recovered from solution by the use of a magnet. , However, the resultant Cr(III) remains in solution, and therefore, it is necessary to apply a second treatment to remove the total Cr. , …”

Section: Introductionmentioning

confidence: 99%

One-Pot Green-Synthesis of Supported Reductive Biogenic Iron-Based Materials for the Removal of Cr(VI)

Paronetto,

Olivelli,

Montes

et al. 2024

Ind. Eng. Chem. Res.

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Development of environmentally friendly materials for efficient pollutant removal is crucial. In this work, a new one-pot green-synthesis of iron-based materials with a reductive/adsorption potential was developed and tested for remediation of Cr(VI) in water. Biogenic iron particles (BioFe) and BioFe supported on raw montmorillonite (BioFe-MMT) were synthesized using a ferric reducing bacteria consortium (FRB), and their structures were extensively characterized by Mössbauer spectroscopy, X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Moreover, the microbial community in the consortium was assessed. Results indicated that BioFe-based materials presented dispersed cubic baricite microparticles containing Fe(II) and Ca2+ in their structure, making them ideal for Cr(VI) remediation. The removal efficiency of Cr(VI) from water by a combination of reduction and adsorption processes using the synthesized materials was evaluated through kinetics experiments. The removal of total chromium was more efficient using supported BioFe than using unsupported BioFe and no dependence with dissolved O2 was detected. The preparation of iron particles with excellent chromium removal performance by a new biobased synthesis could lead to a low-cost and environmentally friendly remediation technology.

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Enhanced adsorptive removal of diclofenac sodium from aqueous solution by bentonite-supported nanoscale zero-valent iron

Cited by 22 publications

References 53 publications

Assessing the Performance of Environmentally Friendly-Produced Zerovalent Iron Nanoparticles to Remove Pharmaceuticals from Water

Assessing the Performance of Environmentally Friendly-Produced Zerovalent Iron Nanoparticles to Remove Pharmaceuticals from Water

Separation of Diclofenac Sodium Using Polysulfone Membranes Incorporated with Manganese Nanoparticles

One-Pot Green-Synthesis of Supported Reductive Biogenic Iron-Based Materials for the Removal of Cr(VI)

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