Removal of Chromium(VI) from Aqueous Solution Using a Novel Green Magnetic Nanoparticle – Chitosan Adsorbent

Matei, Ecaterina; Predescu, Andra Mihaela; Râpă, Maria; Tarcea, Claudia; Pantilimon, Cristian; Favier, Lidia; Berbecaru, Andrei; Sohaciu, Mirela; Predescu, Cristian

doi:10.1080/00032719.2019.1601734

Cited by 15 publications

(17 citation statements)

References 42 publications

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“…Modified chitosan was studied by Zhao et al for the removal of Cd(II) and Pb (II) ions [ 35 ]. In a study by Matei et al [ 36 ], magnetite nanoparticles were incorporated in a chitosan matrix and tested for the removal of Cr 6+ ions from aqueous solutions. The biocompatible composite proved to be suitable for monolayer adsorption of Cr 6+ ions on the porous surface of the material and presented a removal efficiency of 91% for a concentration of 0.5 mg/L Cr 6+ ions.…”

Section: Resultsmentioning

confidence: 99%

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Novel Adsorbent Based on Banana Peel Waste for Removal of Heavy Metal Ions from Synthetic Solutions

et al. 2021

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Due to its valuable compounds, food waste has been gaining attention in different applications, such as life quality and environment. Combined with circular economy requirements, a valorization method for waste, especially banana waste, was to convert them into adsorbents with advanced properties. The banana waste, after thermal treatment, was used with high removal performances (100%) for the removal of heavy metals, such as Cr, Cu, Pb, and Zn, but their small particle size makes them very hard to recover and reuse. For this reason, a biopolymeric matrix was used to incorporate the banana waste. The matrix was chosen for its remarkable properties, such as low cost, biodegradability, low carbon footprint, and reduced environmental impact. In this research, different types of materials (simple banana peel ash BPA and combined with biopolymeric matrix, ALG–BPA, CS–BPA) were prepared, characterized, and tested. The materials were characterized by means of attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), optical microscopy (OM), scanning electron microscopy (SEM), and tested for the removal of metal ions from synthetic solutions using atomic absorption spectroscopy (AAS). The ALG–BPA material proved to be the most efficient in the removal of heavy metal ions from synthetic solution, reaching even 100% metal removal for Cr, Fe, Pb, and Zn, while the CS-based materials were the least efficient, presenting the best values for Cr and Fe ions with a removal efficiency of 34.14% and 28.38%, respectively. By adding BPA to CS, the adsorption properties of the material were slightly improved, but also only for Cr and Fe ions, to 37.09% and 57.78%.

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Section: Resultsmentioning

confidence: 99%

“…In the adsorption process, the metal ions bind to the amino groups and hydroxyl groups [ 21 ]. These kinds of materials have been tested for the removal of metal ions such as Cu(II) [ 33 , 34 ], Cd(II), Pb (II) [ 35 ], and Cr (VI) [ 36 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Adsorbent Based on Banana Peel Waste for Removal of Heavy Metal Ions from Synthetic Solutions

et al. 2021

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“…The Langmuir equation describes heavy metal behavior at a constant temperature (25 °C) on the adsorption capacity, based on Equation (3) [ 44 ]:

where C e is the equilibrium concentration of the adsorbate (mg/L); q e is the adsorbed metal amount (mg/g), Q max is the maximum adsorption capacity (mg/g), and b is the Langmuir constant, L/mg.…”

Section: Methodsmentioning

confidence: 99%

“…The Langmuir equation describes heavy metal behavior at a constant temperature (25 • C) on the adsorption capacity, based on Equation (3) [44]:…”

Section: Adsorption Testsmentioning

confidence: 99%

An Innovative Method of Converting Ferrous Mill Scale Wastes into Superparamagnetic Nanoadsorbents for Water Decontamination

et al. 2021

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The need to recycle and develop nanomaterials from waste, and use them in environmental applications has become increasingly imperative in recent decades. A new method to convert the mill scale, a waste of the steel industry that contains large quantity of iron and low impurities into a nanoadsorbent that has the necessary properties to be used for water purification is presented. The mill scale waste was used as raw material for iron oxide nanopowder. A thorough characterization was performed in each stage of the conversion process from the mill scale powder to magnetic nanopowder including XRD (X-ray diffraction), SEM (scanning electron microscopy), TEM (transmission electron microscopy), BET (Brunauer, Emmett and Teller) and magnetization properties. Iron oxide nanoparticles were approximately 5–6 nm with high specific surface area and good magnetic properties. These are the necessary properties that a magnetic nanopowder must have in order to be used as nanoadsorbents in the heavy metal removal from waters. The iron oxide nanoparticles were evaluated as adsorbents for the removal of Cu, Cd and Ni ions.

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“…Its chemical stability should be improved by the use of crosslinking agents, such as: glutaraldehyde, glycolic ether diglycidyl ethylene and epichlorohydrin [30]. The adsorption properties of chitosan were proved by our team for removal of Cr (VI) [31] and Pb (II) [32].…”

Section: Introductionmentioning

confidence: 99%

Nonwoven Bio-Based Membranes for Removal of Micropollutants from Aqueous Water

Matei¹,

Covaliu²,

Coman³

et al. 2021

Mater. Plast.

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The aim of this paper is to obtain two types of bio-based membranes by electrospinning process: one based on polylactic acid (PLA), and PLA/polyhydroxybutyrate (PHB), and the second by coating the PLA/PHB membrane with chitosan (CS) and CS/activated coal (AC), respectively for removal of micropollutants from aqueous water. The designed bio-based electrospun membranes were analyzed through scanning electron microscopy (SEM), attenuated total reflectance (ATR) - Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), the removal of solid suspension and Pb (II) from aqueous water. The quality of filtrates was evaluated by physical-chemical methods, while the retaining of Pb (II) from wastewaters was reported.

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Removal of Chromium(VI) from Aqueous Solution Using a Novel Green Magnetic Nanoparticle – Chitosan Adsorbent

Cited by 15 publications

References 42 publications

Novel Adsorbent Based on Banana Peel Waste for Removal of Heavy Metal Ions from Synthetic Solutions

Novel Adsorbent Based on Banana Peel Waste for Removal of Heavy Metal Ions from Synthetic Solutions

An Innovative Method of Converting Ferrous Mill Scale Wastes into Superparamagnetic Nanoadsorbents for Water Decontamination

Nonwoven Bio-Based Membranes for Removal of Micropollutants from Aqueous Water

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