Removal of Cd(II), Co(II), Cr(III), Ni(II), Pb(II) and Zn(II) ions from wastewater using polyethyleneimine (PEI) cryogels

Bağdat, Sema; Tokay, Feyzullah; Demirci, Şahin; Şahiner, Mehtap

doi:10.1016/j.jenvman.2022.117002

Cited by 16 publications

(9 citation statements)

References 50 publications

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“…compares the adsorption ability of the system studied in the present work for Cr(III) with others already reported in the literature. The values found in the present study was quite similar to other employing biochar(Chen et al, 2015), kaolinite(Petrović et al 2023), diatomite(Gürü et al 2008) and polyethyleneimine cryogel(Bagdat et al 2023). Thus, by using Pal, a low cost and available clay mineral, functionalized with aminosilane as adsorbent, it was possible to obtain high levels of removal of Cr(III)…”

supporting

confidence: 91%

Amino-Silane - Functionalized Palygorskite with as a Promising Adsorbent for Cr(III): Evaluation of the process variables

Anjos,

Santos,

Bertolino

et al. 2023

Preprint

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Chromium represents a serious threat to living organisms and ecological system. Thus, this removal from wastewater is an urgent concern. The present study evaluates the ability of the functionalized clay mineral palygorskite (PalSIL) to remove the Cr(III) ion under different experimental conditions as a function of process variables: contact time, adsorbate concentration, amount of adsorbent and pH. Palygorskite (Pal) from Guadalupe (Piauí/Brazil) was treated with 3-aminopropyl-trimethoxy silane and characterized by. Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis, surface charge measurements (zeta potential) and textured properties (BET). The incorporation of amino-silane functional groups on the Pal surface resulted in maximum adsorption capacity of 21 mg g− 1 and the maximum removal percentage of 99%. Data on removal percentages were analyzed using statistical analysis to predict the most significant factors and interactions in this process. The results indicated that the adsorbate concentration, the amount of adsorbent and the pH significantly influenced the removal of Cr(III) ions. It is believed that the adsorption process occurred by the complexation of Cr(III) ions with the organo-functional amino group present at the surface of PalSIL. The kinetic parameters indicated that the fast mechanism of the adsorptive process is a phenomenon of chemical nature. The reaction equilibrium was quickly reached, demonstrating a readily available surface for adsorption. Thus, the present results indicate that PalSIL has the potential to remove Cr(III) ions and probably other potentially toxic elements from wastewater.

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supporting

confidence: 91%

Amino-Silane - Functionalized Palygorskite with as a Promising Adsorbent for Cr(III): Evaluation of the process variables

Anjos,

Santos,

Bertolino

et al. 2023

Preprint

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“…The prepared PC-L-PEI H was physically crosslinked with NH … N hydrogen bonding, as reported in the literature [ 29 ]. On the other hand, the chemically crosslinked CC-L-PEI H and CC-L-PEI C structures were crosslinked with GDE via ring-opening reactions, as reported in the literature [ 8 ]. The amine groups of L-PEI chains reacted with the epoxy groups of GDE, and CC-L-PEI H and CC-L-PEI C structures were prepared at room temperature and −20 °C, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…There was also an NH stretching vibration peak at 3271 cm− 1 that was clearly seen in CC-L-PEI H and CC-L-PEI C structures. There were also two new peaks observed at 1155 and 1060 cm −1 which are assigned to C−O stretch and −OH bending vibration as a result of crosslinking with GDE [ 8 ].…”

Section: Resultsmentioning

confidence: 99%

“…For the preparation of PC-L-PEI/TA H , intramolecular hydrogen bonds between NH … O or N … HO play an active role. On the other hand, the chemically crosslinked CC-L-PEI/TA H and CC-L-PEI/TA C structures were crosslinked with GDE, due to the reaction of the epoxy ring with both -OH and -NH [ 8 , 32 ]. The prepared CC-L-PEI/TA hydrogels and cryogels can also be presumed to be copolymeric networks due to the crosslinking of L-PEI and TA molecules with each other [ 39 , 40 ].…”

Section: Resultsmentioning

confidence: 99%

“…Polyethyleneimine (PEI), one of the most attractive polycations, is well-recognized for its versatility and highly positively charged nature in a variety of formulations. Previous research has demonstrated that PEI is capable of interacting with metal ions and negative ions through complexing or neutralization [ 8 ]. Furthermore, PEI is compatible with a variety of substrates and may be applied as functional coatings [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

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Physically and Chemically Crosslinked, Tannic Acid Embedded Linear PEI-Based Hydrogels and Cryogels with Natural Antibacterial and Antioxidant Properties

2023

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Linear polyethyleneimine (L-PEI) was obtained from the acidic hydrolysis of poly(2-ethyl-2-oxazoline) and employed in the synthesis of physically crosslinked L-PEI hydrogel, PC-L-PEIH, chemically crosslinked L-PEI hydrogel, CC-L-PEIH, and cryogels, CC-L-PEIC. The preparation of L-PEI-based hydrogel networks was carried out in two ways: 1) by cooling the L-PEI solution from 90 °C to room temperature, and 2) by crosslinking L-PEI chains with a crosslinker, glycerol diglycidyl ether = 20 °C for CC-L-PEIC. Furthermore, a polyphenolic compound, tannic acid (TA), with superior antibacterial, antioxidant, and anti-inflammatory properties as an active biomedical functional agent, was encapsulated during the synthesis process within L-PEI-based hydrogels and cryogels, at 10% and 25% (w/w) based on the L-PEI amount. A linear and higher TA release was observed from physically crosslinked PEI-based hydrogels containing 10% and 25% TA-containing PC-L-PEI/TAH within 6 h, with 9.5 ± 05 mg/g and 60.2 ± 3.8 mg/g cumulative released amounts, respectively. A higher antioxidant activity was observed for 25% TA containing PC-L-PEI/TAH with 53.6 ± 5.3 µg/mL total phenol content and 0.48 ± 0.01 µmole Trolox equivalent/g. The minimum bactericidal concentration (MBC) of PC-L-PEIH and CC-L-PEIC networks against both E. coli (ATCC 8739) and Gram-positive B. subtilis (ATCC 6633) bacteria was determined at 5 mg/mL, whereas the MBC value of 10 mg/mL for CC-L-PEIH networks against the same bacteria was achieved.

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Facile Synthesis of MgO/CuO and MgO/Cu3MgO4 Binary Nanocomposites as Promising Adsorbents for the Disposal of Zn(II) Ions

Abdelrahman,

Khalil,

Algethami

et al. 2023

J Inorg Organomet Polym

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Removal of Cd(II), Co(II), Cr(III), Ni(II), Pb(II) and Zn(II) ions from wastewater using polyethyleneimine (PEI) cryogels

Cited by 16 publications

References 50 publications

Amino-Silane - Functionalized Palygorskite with as a Promising Adsorbent for Cr(III): Evaluation of the process variables

Amino-Silane - Functionalized Palygorskite with as a Promising Adsorbent for Cr(III): Evaluation of the process variables

Physically and Chemically Crosslinked, Tannic Acid Embedded Linear PEI-Based Hydrogels and Cryogels with Natural Antibacterial and Antioxidant Properties

Facile Synthesis of MgO/CuO and MgO/Cu3MgO4 Binary Nanocomposites as Promising Adsorbents for the Disposal of Zn(II) Ions

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