Zero Valent Iron Nanoparticle-Loaded Nanobentonite Intercalated Carboxymethyl Chitosan for Efficient Removal of Both Anionic and Cationic Dyes | Zendy

Abdelazeem S. Eltaweil | Zendy; Ashraf M. El-Tawil | Zendy; Eman M. Abd El-Monaem | Zendy; Gehan M. ElSubruiti | Zendy

Open Access

Zero Valent Iron Nanoparticle-Loaded Nanobentonite Intercalated Carboxymethyl Chitosan for Efficient Removal of Both Anionic and Cationic Dyes

Author(s) -

Abdelazeem S. Eltaweil,

Ashraf M. El-Tawil,

Eman M. Abd El-Monaem,

Gehan M. ElSubruiti

Publication year - 2021

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.0c06251

Subject(s) - zerovalent iron , cationic polymerization , langmuir adsorption model , adsorption , endothermic process , zeta potential , composite number , crystal violet , materials science , nuclear chemistry , congo red , chemical engineering , carboxymethyl cellulose , chemistry , nanoparticle , polymer chemistry , nanotechnology , composite material , organic chemistry , metallurgy , sodium , engineering , medicine , pathology

A zero valent iron-loaded nano-bentonite intercalated carboxymethyl chitosan (nZVI@nBent-CMC) composite was fabricated and characterized by FT-IR, TEM, TEM-EDX, XRD, BET surface area, and zeta potential measurements. The as-fabricated nZVI@nBent-CMC composite exhibited excellent removal efficiency for both anionic Congo red (CR) dye and cationic crystal violet (CV) dye. The maximum uptake capacities of CR and CV onto the nZVI@nBent-CMC composite were found to be 884.95 and 505.05 mg/g, respectively. The adsorption process of both dyes well fitted with the Langmuir isotherm model and pseudo-second order kinetic model. Thermodynamic data clarified that the adsorptions of both CR and CV onto the nZVI@nBent-CMC composite are spontaneous processes. Moreover, the adsorption of CR onto the nZVI@nBent-CMC composite was found to be an exothermic process while that of CV is an endothermic process. The nZVI@nBent-CMC composite also exhibited excellent reusability for both studied dyes without noticeable loss in the removal efficiency, suggesting its validity to remove both anionic and cationic dyes from wastewater.

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