Mesoporous nanomaterials based on manganese with different interlayer alkali cations: An efficient approach for the removal of Pb(II) and Cd(II) from aqueous medium

Amarray, Amina; Ghachtouli, Sanae El; Leroy, Jacques; Bonnaillie, Patrick; Khaless, Khaoula; Dahbi, Mouad; Azzi, M.

doi:10.1016/j.jwpe.2021.101944

Cited by 7 publications

(5 citation statements)

References 93 publications

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“…The O 1s peak shifted to a higher binding energy after adsorption. This shift in binding energy position may be due to electron transfer between the heavy metal ions (M 2+ ) and the Mn 3 O 4 –AL, indicating the formation of –Mn–O–M 2+ , –Si–O–M 2+ and –COO–M 2+ compounds [ 21 , 74 , 75 ]. Furthermore, detailed spectra of the peaks of Pb, Cu, and Ni are shown in Figure 7 .…”

Section: Resultsmentioning

confidence: 99%

Resourcization of Argillaceous Limestone with Mn3O4 Modification for Efficient Adsorption of Lead, Copper, and Nickel

Li,

et al. 2024

Toxics

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Argillaceous limestone (AL) is comprised of carbonate minerals and clay minerals and is widely distributed throughout the Earth’s crust. However, owing to its low surface area and poorly active sites, AL has been largely neglected. Herein, manganic manganous oxide (Mn3O4) was used to modify AL by an in-situ deposition strategy through manganese chloride and alkali stepwise treatment to improve the surface area of AL and enable its utilization as an efficient adsorbent for heavy metals removal. The surface area and cation exchange capacity (CEC) were enhanced from 3.49 to 24.5 m2/g and 5.87 to 31.5 cmoL(+)/kg with modification, respectively. The maximum adsorption capacities of lead (Pb2+), copper (Cu2+), and nickel (Ni2+) ions on Mn3O4-modified argillaceous limestone (Mn3O4–AL) in mono-metal systems were 148.73, 41.30, and 60.87 mg/g, respectively. In addition, the adsorption selectivity in multi-metal systems was Pb2+ > Cu2+ > Ni2+ in order. The adsorption process conforms to the pseudo-second-order model. In the multi-metal system, the adsorption reaches equilibrium at about 360 min. The adsorption mechanisms may involve ion exchange, precipitation, electrostatic interaction, and complexation by hydroxyl groups. These results demonstrate that Mn3O4 modification realized argillaceous limestone resourcization as an ideal adsorbent. Mn3O4-modified argillaceous limestone was promising for heavy metal-polluted water and soil treatment.

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Section: Resultsmentioning

confidence: 99%

Resourcization of Argillaceous Limestone with Mn3O4 Modification for Efficient Adsorption of Lead, Copper, and Nickel

Li,

et al. 2024

Toxics

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“…Initially, 1 g of potassium permanganate (KMnO4) was dissolved in 250 mL of deionized water and heated at 80 °C for 30 minutes with constant stirring. Subsequently, 50 mL of hydrochloric acid (HCl, 4 mol/L) was added dropwise (Amarray et al 2021) (Yang et al 2018). The reaction mixture was continuously stirred at 50 °C for 18 hours.…”

Section: Synthesis Of K-mno2mentioning

confidence: 99%

“…Manganese oxide K-MnO2 was synthesized through a chemical reaction involving potassium permanganate and hydrochloric, as demonstrated in the following equation (Amarray et al 2021):…”

Section: Synthesismentioning

confidence: 99%

“…These diffraction peaks are characteristic of birnessite-type manganese oxide intercalated with potassium ions (K-MnO2) (JCPDS no. card 52-0556) (Amarray et al 2021). The synthesized manganese oxide belongs to the family of pure two-dimensional birnessite, composed of alternate stacks of potassium cations and octahedral [MnO6] layers, separated by interlayer distances of approximately 7.2 Å for K-MnO2 (Jakubek et al 2020).…”

Section: Spectroscopic Characterizationmentioning

confidence: 99%

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Enhancing hexavalent chromium removal using amino-functionalized manganese oxide (birnessite) for improved adsorption efficiency

Slek,

Amarray,

Salmi

et al. 2024

Preprint

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This study investigates the use of functionalized manganese oxide (K-MnO2-NH2) for removing Cr(VI) ions, a notably hazardous heavy metal contaminant,, from wastewater. The synthesis of K-MnO2-NH2 occurred in two steps followed by comprehensive characterization using various techniques, confirming its formation as pure-phase. The material demonstrated a high chromium removal efficiency (up to 90% at pH 2) attributed primarily to the introduction of amine groups through functionalization with 3-aminopropyltriethoxysilane (APTES). These amine groups create active sites displaying a strong affinity towards Cr(VI) ions. Kinetic studies suggest a chemical reaction governs the adsorption process, while thermodynamic data indicate it to be exothermic. Freundlich isotherm best describes the adsorption behaviour compared to Langmuir and Temkin models. K-MnO2-NH2 effectively removed Cr(VI) from real wastewater, achieving a removal efficiency of around 41% and causing a visible discoloration. Remarkably, the material exhibits excellent reusability, maintaining over 80% removal efficiency after five cycles without any regeneration procedures. This innovative approach provides a sustainable and efficient method for removing Cr(VI) from wastewater, showcasing the considerable potential of K-MnO2-NH2 in environmental remediation and water purification efforts.

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“…On the other hand, all these industrial activities have led to the exhaustion of metal land mineral resources. The wastewaters produced from these industrial activities represents serious environmental problems and a threat for human health and the natural ecosystems [ 1 , 2 , 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

New Approaches for Pb(II) Removal from Aqueous Media Using Nanopowder Sodium Titanosilicate: Kinetics Study and Thermodynamic Behavior

Popovici,

Dobrinaș,

Soceanu

et al. 2023

IJMS

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Microporous sodium titanosilicate, Na2TiSiO5, has been successfully prepared using the sol–gel method. The structural and morphological characterization of synthesized product has been made via thermal analyses (TG-DTG), X-ray diffraction (XRD), and electron microscopy (SEM and TEM). Adsorption properties of the synthesized Na2TiSiO5 nanopowder for Pb(II) removal of aqueous media was investigated in different experimental conditions such as the contact time, the initial metal concentration, the pH, and the temperature. The Pb(II) adsorption on Na2TiSiO5 was discussed according to the kinetics and thermodynamics models. The adsorption kinetics of Pb(II) have been better described by the PS-order kinetic model which has the highest fitting correlation coefficients (R2: 0.996–0.999) out of all the other models. The adsorption results have been successfully fitted with the Langmuir and Redlich–Paterson models (R2: 0.9936–0.9996). The calculated thermodynamic parameters indicate that the Pb(II) adsorption is an endothermic process, with increased entropy, having a spontaneous reaction. The results have revealed a maximum adsorption capacity of 155.71 mg/g at 298 K and a very high adsorption rate at the beginning, more than 85% of the total amount of Pb(II) being removed within the first 120 min, depending on the initial concentration.

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Mesoporous nanomaterials based on manganese with different interlayer alkali cations: An efficient approach for the removal of Pb(II) and Cd(II) from aqueous medium

Cited by 7 publications

References 93 publications

Resourcization of Argillaceous Limestone with Mn3O4 Modification for Efficient Adsorption of Lead, Copper, and Nickel

Resourcization of Argillaceous Limestone with Mn3O4 Modification for Efficient Adsorption of Lead, Copper, and Nickel

Enhancing hexavalent chromium removal using amino-functionalized manganese oxide (birnessite) for improved adsorption efficiency

New Approaches for Pb(II) Removal from Aqueous Media Using Nanopowder Sodium Titanosilicate: Kinetics Study and Thermodynamic Behavior

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