Upgrading sodium montmorillonite into a reactive internal curing agent for sustainable cement composites through non-ionic functionalization

Luo, Dayou; Wei, Jianqiang

doi:10.1016/j.compositesb.2022.110076

Cited by 8 publications

(1 citation statement)

References 52 publications

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“…Tis replacement occurs following the removal of the metal cation-hydration outer sphere. Moreover, the fndings of several studies in the literature corroborate the reported association between metal ions' adsorption and a more comprehensive pH range [56]. Te adsorption kinetics quantifes the rate of solute adsorption at the solid-liquid interface and provides critical information on the equilibrium time, which is necessary for the design and operation of an adsorption process [57].…”

Section: Infuence Of Ph On Co (Ii) Removal By the Nanosorbentsupporting

confidence: 64%

Green Synthesis Ca-MgO Nanosorbent for the Uptake of Cobalt Ions from Aqueous Media

Al-Awaji

Boukriba

Idriss

et al. 2022

Advances in Materials Science and Engineering

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Ca-doped magnesium oxide nanosorbent has been prepared by sol-gel in the presence of gum arabic extract and assessed for the removal of cobalt ions (Co (II)) from aqueous media. X-ray diffraction analysis indicates the formation of MgO and CaO composites with a mean crystallite size of 6 nm having a large surface area of 50 m2/g. Scanning and transmission electron microscopy observations reveal spherical-shaped particles at the nanoscale around 20 nm. Besides, X-ray photoelectron spectroscopy and Fourier transform infrared analyses manifest the existence of functional groups, which will facilitate the adsorption of metal ions. The adsorption capability of the CaO-MgO nanosorbent achieved 469.5 mg/g for Co (II) ions under optimum operating conditions. Furthermore, the experimental data elucidate that the adsorption process is primarily diffusion-based and that both intraparticle and boundary layer diffusion appear to play a key role in the rate-controlling step. The findings of this study highlight the remediation of contaminated water by cobalt ions by CaO-MgO nanostructure and can be extended to other metal ions and organic pollutants.

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Section: Infuence Of Ph On Co (Ii) Removal By the Nanosorbentsupporting

confidence: 64%