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Novel and Effective Zn-Al-GA LDH Anchored on Nanofibers for High-Performance Heavy Metal Removal and Organic Decontamination: Bioremediation Approach

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Abstract

Heavy metals and dye contaminations pose the most critical environmental problems facing the world today . These may lead to bad effects on human, animal’s health, and aquatic ecosystems. Herein, we report a facile and effective approach to fabricate controllable design of tunable Zn/Al/gallate layered double hydroxide/polystyrene nanofibers (Zn/Al/GA LDH/PSNFs).The prepared materials before and after adsorption process were characterized by BET surface area, X-ray diffraction, FT-IR analysis FESEM and HRTEM. In the current work, the removal of copper metal ions and malachite green dye (MG) by Zn/Al/GA LDH/PSNFs were investigated. Studying the influence of different factors on the performance of pollutant adsorption was estimated. Adsorption kinetics and isotherms of Cu2+ metal ions and MG dye  were investigated under various conditions including (pH 5, dose 0.05 g/L and 2 h) and (pH 8, dose 0.05 g/L and 3 h), respectively, at 25 °C. The fabricated Zn/Al/GA LDH/PSNFs material achieved excellent adsorption performance with maximum adsorption capacity 190 mg/g and 60.7 mg/g for Cu2+ metal ions and MG, respectively. The reusability of the prepared adsorbent achieved very good cycling stability. Furthermore, the Zn/Al/GA LDH/PSNFs showed good antibacterial activity against both Gram-positive and Gram-negative bacteria strains.

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Abbreviations

GA:

Gallic acid

PSNFs:

polystyrene nanofibers

LDH:

layered double hydroxide

XRD:

X-ray diffraction

FTIR:

Fourier transform infrared spectroscopy

HRTEM:

high-resolution transmission electron microscopy

FESEM:

field emission scanning electron microscopy

EDAX:

energy-dispersive X-ray spectroscopy

MG :

malachite green

MBC:

minimum bactericidal concentration

MIC:

the lowest concentration of Zn/Al-GA LDH

q e :

Amount of adsorbate in the adsorbent at equilibrium (mg/g)

C e :

Equilibrium concentration (mg/L)

q max :

Maximum adsorption capacity (mg/g)

K L :

Langmuir adsorption constant (L/mg)

K f :

Second-order rate constant (g mg−1 min−1)

q t :

Amount of Cu2+ metal ions or MG dye adsorbed at time t

k 1 :

First-order rate constant (min−1)

k 2 :

.

f 2 :

The mixed 1,2 order coefficient (dimensionless)

q e,calc :

Calculated adsoprption capacity

qe, Exp :

Adsorption capacity at equilibrium (mg/g), experimental

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt

    Rehab K. Mahmoud & Amna A. Kotp

  2. Renewable Energy Science and Engineering Department, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University, Beni-Suef, Egypt

    Ahmed G. El-Deen

  3. Materials Science and Nanotechnology Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, Egypt

    Ahmed A. Farghali

  4. Department of Pharmacology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, Egypt

    Fatma I. Abo El-Ela

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  1. Rehab K. Mahmoud
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Mahmoud, R.K., Kotp, A.A., El-Deen, A.G. et al. Novel and Effective Zn-Al-GA LDH Anchored on Nanofibers for High-Performance Heavy Metal Removal and Organic Decontamination: Bioremediation Approach. Water Air Soil Pollut 231, 363 (2020). https://doi.org/10.1007/s11270-020-04629-4

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