Mechanistic insights of hexavalent chromium remediation by halloysite-supported copper nanoclusters

Deb, Amal Kanti; Biswas, Bhabananda; Naidu, Ravi; Rahman, Mohammad Mahmudur

doi:10.1016/j.jhazmat.2021.126812

Cited by 24 publications

(10 citation statements)

References 78 publications

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“…In contrast, the interior layer comprises aluminol (Al–OH) groups exhibiting positive charges . Around 10–15 aluminosilicate layers are trundled through interlayer water molecules to form a multiwalled clay nanotube . The dimensions of HNT vary based on the geological sources and natural deposits, and it is usually 20–3000 nm long with 30–190 nm outer widths and 10–100 nm internal widths .…”

Section: Introductionmentioning

confidence: 99%

“…23 Around 10−15 aluminosilicate layers are trundled through interlayer water molecules to form a multiwalled clay nanotube. 24 The dimensions of HNT vary based on the geological sources and natural deposits, and it is usually 20− 3000 nm long with 30−190 nm outer widths and 10−100 nm internal widths. 25 This unique feature allows this material to accommodate other nanoparticles and chemicals on the exterior surfaces and innermost spaces (i.e., lumen) depending on the charge and size of the guests.…”

Section: Introductionmentioning

confidence: 99%

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Magnetite Nanoparticles Loaded into Halloysite Nanotubes for Arsenic(V) Removal from Water

Deb

Biswas

Rahman

et al. 2022

ACS Appl. Nano Mater.

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Groundwater contaminated by arsenic (As) is a serious concern because it poses a significant threat to millions of people reliant on both drinking and irrigation of farms. Hence, the low-cost and efficient treatment of these waters is of utmost importance. This study presents the ecofriendly synthesis of magnetite nanoparticles (Fe3O4 NPs)-immobilized halloysite nanotube (HNT) composite (Fe3O4@HNT) for remediating arsenate [As(V)] from water. High-resolution transmission electron microscopy confirmed that ultrasmall Fe3O4 NPs (4.52 ± 1.63 nm) were immobilized on the interior surface of HNT. Fe3O4@HNT possesses a larger surface area (82 ± 0.23 m2/g) and a higher thermal stability (7.1% weight loss at 950 °C) than a pristine HNT (47.23 ± 0.14 m2/g and 12.6%, respectively). Adsorption kinetics were best fitted with pseudo-second-order and intraparticle diffusion, while the isotherms results were best supported with the Freundlich model (R 2 = 0.99 in each case). Therefore, it could be surmised that multiphase rate-controlling chemisorption occurred during adsorption. The thermodynamics data revealed the endothermic nature of As(V) adsorption by Fe3O4@HNT. Fourier transform infrared and X-ray photelectron spectroscopy analyses confirmed chemical bonding between As and Fe. In addition, Fe3O4@HNT was easily separable by an external magnet (the saturation magnetization value was 20 emu/g), which is an additional benefit of the material to be used on an industrial scale. The material was also reusable after regeneration for five rounds of consecutive sorption–desorption with excellent efficiency and no substantial loss of structural integrity. Furthermore, Fe3O4@HNT removed more than 99% As(V) from the groundwater, signifying its viability in real-case implementation. Cost-benefit analysis ensured that Fe3O4@HNT was cost-effective, while its biocompatibility test confirmed no detrimental impact on soil bacterial growth once the spent material had been disposed. Consequently, cheap, easily separable, reusable, and biocompatible Fe3O4@HNT may be a prospective composite for the sustainable eradication of As and other metallic toxicants from wastewater.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetite Nanoparticles Loaded into Halloysite Nanotubes for Arsenic(V) Removal from Water

Deb

Biswas

Rahman

et al. 2022

ACS Appl. Nano Mater.

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“…The equilibrium adsorption of the Ti 3 C 2 @Fe 3 O 4 @β-CD was analyzed using Langmuir and Freundlich adsorption isotherms. 35 …”

Section: Resultsmentioning

confidence: 99%

“…The amount of DOX-adsorbed on the Ti 3 C 2 @Fe 3 O 4 @β-CD surface and the amount of DOX remaining in the solution at a fixed temperature and pH at equilibrium can be evaluated by isotherms. The equilibrium adsorption of the Ti 3 C 2 @Fe 3 O 4 @β-CD was analyzed using Langmuir and Freundlich adsorption isotherms …”

Section: Resultsmentioning

confidence: 99%

“…In order to research and construct the adsorption isotherm of DOX onto the Ti 3 C 2 @Fe 3 O 4 @β-CD, a series of concentrations of 2, 4, 6, 8, 10, 20, 30, 50, 80, and 100 μg mL –1 DOX standard solutions (pH 7.0) were prepared and individually mixed with Ti 3 C 2 @Fe 3 O 4 @β-CD (5 mg). The mixture was mechanically shaken for 60 min at 25 °C, and the adsorption capacity ( Q e ) at equilibrium for DOX onto the Ti 3 C 2 @Fe 3 O 4 @β-CD was calculated as eq 2 : 35 where Q e is the adsorption capacity at equilibrium (μg mg –1 ), V is the volume of solution in (mL), and m is the mass of the adsorbent (mg).…”

Section: Methodsmentioning

confidence: 99%

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Magnetic Ti₃C₂ MXene Nanomaterials for Doxorubicin Adsorption from Aqueous Solutions: Kinetic, Isotherms, and Thermodynamic Studies

Liu

Sun

et al. 2022

ACS Omega

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In this work, the magnetic Ti 3 C 2 MXene functionalized with β-cyclodextrin was prepared and characterized using scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectra, X-ray diffraction, X-ray photoelectron spectroscopy, vibrating sample magnetometry, and thermogravimetric analysis. The synthesized nanomaterial was used as an adsorbent to adsorb doxorubicin from aqueous solutions, and the experimental parameters that affected the adsorption efficiency were investigated. In addition, the adsorption characteristics including adsorption kinetics, adsorption isotherm, and thermodynamics were researched comprehensively. The adsorption kinetics of doxorubicin followed a pseudo-second-order kinetic model, which indicated that adsorption was the rate-limiting step, and the maximum adsorption capacity was 7.35 μg mg –1 by shaking for 60 min at pH 7.0. The adsorption isotherm was well described using the Freundlich model, which implied that multilayer adsorption took place over the prepared nanomaterial for doxorubicin adsorption. The negative values of Gibbs free energy change (Δ G 0 < 0) demonstrated that doxorubicin adsorption was a spontaneous process. The positive values of entropy change (Δ S 0 > 0) implied that doxorubicin adsorption was an increasing random process. Enthalpy change values were positive (Δ H 0 > 0) and indicated that the adsorption of doxorubicin was endothermic. The adsorption percentage of doxorubicin remained in the range of 41.05–44.09%, and the relative standard deviation (RSD) based on the adsorption percentage through five replicate adsorption and desorption processes was 2.8%. These results indicated that the magnetic Ti 3 C 2 MXene nanomaterials can be an effective adsorbent to adsorb DOX from aqueous solutions.

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Toxicity of Rhizospheric Chromium Contaminated Soil and Its Phytoremediation

Das,

Das

et al. 2023

Environmental Science and Engineering

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Mechanistic insights of hexavalent chromium remediation by halloysite-supported copper nanoclusters

Cited by 24 publications

References 78 publications

Magnetite Nanoparticles Loaded into Halloysite Nanotubes for Arsenic(V) Removal from Water

Magnetite Nanoparticles Loaded into Halloysite Nanotubes for Arsenic(V) Removal from Water

Magnetic Ti₃C₂ MXene Nanomaterials for Doxorubicin Adsorption from Aqueous Solutions: Kinetic, Isotherms, and Thermodynamic Studies

Toxicity of Rhizospheric Chromium Contaminated Soil and Its Phytoremediation

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Mechanistic insights of hexavalent chromium remediation by halloysite-supported copper nanoclusters

Cited by 24 publications

References 78 publications

Magnetite Nanoparticles Loaded into Halloysite Nanotubes for Arsenic(V) Removal from Water

Magnetite Nanoparticles Loaded into Halloysite Nanotubes for Arsenic(V) Removal from Water

Magnetic Ti3C2 MXene Nanomaterials for Doxorubicin Adsorption from Aqueous Solutions: Kinetic, Isotherms, and Thermodynamic Studies

Toxicity of Rhizospheric Chromium Contaminated Soil and Its Phytoremediation

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Magnetic Ti₃C₂ MXene Nanomaterials for Doxorubicin Adsorption from Aqueous Solutions: Kinetic, Isotherms, and Thermodynamic Studies