Selective adsorption of gadolinium from real leachate using a natural bentonite clay

Dotto, Guilherme Luiz; Vieillard, Julien; Pinto, Diana; Lütke, Sabrina F.; Silva, Luis; Reis, Glaydson S. dos; Lima, Éder C.; Franco, Dison Stracke Pfingsten

doi:10.1016/j.jece.2023.109748

Cited by 16 publications

(2 citation statements)

References 51 publications

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“…The Freundlich isotherm constant is denoted by k F ((mg/g) (mg/L) −1/n F ) 82 , where n is the dimensionless exponent of the Freundlich. K F and n are the determined values.…”

Section: Resultsmentioning

confidence: 99%

Design of silver-zinc-nickel spinel-ferrite mesoporous silica as a powerful and simply separable adsorbent for some textile dye removal

Okba,

Rabea,

El-Sheikh

et al. 2024

Sci Rep

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Silver-zinc-nickel spinel ferrite was prepared by the co-precipitation procedure with the precise composition Ag0.1Zn0.4Ni0.5Fe2O4 for bolstering pollutant removal effectiveness while upholding magnetic properties and then coated with a mesoporous silica layer. The surface characteristics and composition of Ag0.1Zn0.4Ni0.5Fe2O4@mSiO2 were confirmed using EDX, FT-IR, VSM, XRD, TEM, SEM, and BET methods. The surface modification of Ag-Zn-Ni ferrite with a silica layer improves the texture properties, where the specific surface area and average pore size of the spinel ferrite rose to 180 m2/g and 3.15 nm, respectively. The prepared spinel ferrite@mSiO2 has been utilized as an efficient adsorbent for eliminating methyl green (MG) and indigo carmine (IC) as models of cationic and anionic dyes from wastewater, respectively. Studying pH, Pzc, adsorbent dosage, dye concentration, and temperature showed that efficient removal of MG was carried out in alkaline media (pH = 12), while the acid medium (pH = 2) was effective for IC removal. Langmuir isotherm and pseudo-second-order kinetics were found to be good fits for the adsorption data. Both dyes were adsorbed in a spontaneous, endothermic process. A possible mechanism for dye removal has been proposed. The adsorbent was effectively recovered and reused.

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“…The Freundlich isotherm constant is denoted by k F ((mg/g) (mg/L) −1/n F ) 82 , where n is the dimensionless exponent of the Freundlich. K F and n are the determined values.…”

Section: Resultsmentioning

confidence: 99%

Design of silver-zinc-nickel spinel-ferrite mesoporous silica as a powerful and simply separable adsorbent for some textile dye removal

Okba,

Rabea,

El-Sheikh

et al. 2024

Sci Rep

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show abstract

“…∆G • values between −20 and 0 kJ mol −1 indicate a predominance of the physisorption phenomenon, as observed at the lower temperatures in this study (288-298 K), ranging from −1.51 to −6.26 kJ mol −1 . However, at higher temperatures (308-318 K), the ∆G • values are ≤−20 kJ mol −1 , ranging from −20.44 to −26.99 kJ mol −1 , indicating a shift in the predominant adsorption equilibrium mechanism [97,98]. Additionally, positive ∆S • values for all adsorbates imply some structural adjustments at the interface during the adsorption process.…”

Section: Ac Po4 Thermodynamic Parametersmentioning

confidence: 92%

Single-Step Modification of Brewer’s Spent Grains Using Phosphoric Acid and Application in Cheese Whey Remediation via Liquid-Phase Adsorption

Castro,

Matheus,

Mançano

et al. 2023

Water

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Brewer’s spent grains (BSG) are a significant by-product of beer production, and its improper disposal poses environmental challenges. This study investigated the use of BSG for activated carbon production with phosphoric acid as a chemical activator and its application in cheese whey remediation through liquid-phase adsorption. The adsorbent was thoroughly characterized through using techniques such as FTIR, SEM, N2 isotherms, and surface charge distribution. The adsorbent exhibited substantial pores, a high surface area (605.1 m2 g–1), good porosity, and positive surface charges that facilitated favorable interactions with cheese whey compounds. Equilibrium was achieved in 330 min for lactose, BOD5, and COD. The maximum adsorption capacities were 12.77 g g–1 for lactose, 3940.99 mg O2 g–1 for BOD5, and 12,857.92 mg O2 g−1 for COD at 318 K. Removing these adsorbates from cheese whey effluent reduces its organic load, enabling water reuse in the manufacturing unit, depending on its intended use. The adsorption process was spontaneous and endothermic, with ΔH° ≥ 265.72 kJ mol−1. Additionally, the activated carbon produced demonstrated impressive regeneration capability with sodium hydroxide, maintaining 75% of its adsorption capacity. These results emphasize the potential of activated carbon as an effective adsorbent for cheese whey remediation, providing a sustainable solution for waste management in the dairy industry and water reuse.

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Valorization of winemaking residues as biochar for removing Ni(II) from real industrial painting process effluent in a fixed-bed column

de Lima Carvalho,

dos Santos,

Knani

et al. 2024

Environ Sci Pollut Res

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Selective adsorption of gadolinium from real leachate using a natural bentonite clay

Cited by 16 publications

References 51 publications

Design of silver-zinc-nickel spinel-ferrite mesoporous silica as a powerful and simply separable adsorbent for some textile dye removal

Design of silver-zinc-nickel spinel-ferrite mesoporous silica as a powerful and simply separable adsorbent for some textile dye removal

Single-Step Modification of Brewer’s Spent Grains Using Phosphoric Acid and Application in Cheese Whey Remediation via Liquid-Phase Adsorption

Valorization of winemaking residues as biochar for removing Ni(II) from real industrial painting process effluent in a fixed-bed column

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