Modeling of breakthrough curves in removal of Cr(VI) and methylene blue using immobilized activated carbon from natural rubber waste

Mahapatra, Uttara; Manna, Ajay Kumar; Chatterjee, Abhijit

doi:10.1016/j.biteb.2023.101600

Cited by 4 publications

(1 citation statement)

References 51 publications

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“…These demerits can be avoided by incorporating nZVI particles onto a spongy media to improve its removal efficiency. Several sorbents impregnated by nZVI particles were utilized for capturing Cr 6+ and have been testified as activated carbon (AC) 26 , chitosans 27 , biochar 28 , bentonite 29 , carbon nanotubes 30 , humus 31 , and silica 32 . Some of them exhibit low removal efficiencies and costly and tedious synthesis procedures.…”

Section: Introductionmentioning

confidence: 99%

Hexavalent chromium ion removal from wastewater using novel nanocomposite based on the impregnation of zero-valent iron nanoparticles into polyurethane foam

Saad,

Abd-Elhafiz,

Ahmed

et al. 2024

Sci Rep

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In this study, we developed a novel nanocomposite, polyurethane foam impregnated with zero-valent iron nanoparticles (PU@nZVI), for the effective removal of chromium(VI) from various water sources. The characterization of nanocomposite (PU@nZVI) was performed by XRD, SEM–EDS, TEM and FT-IR techniques. Using the response surface methodology, we optimized the removal conditions, achieving an optimal pH of 2 and a dose of 0.5 g/L. The PU@nZVI demonstrated an excellent maximum adsorption capacity of 600.0 mg/g for Cr6+. The adsorption kinetics and isotherms were best described by the pseudo-second-order model and the Freundlich isotherm, respectively. Significantly, the nanocomposite removed 99.98% of Cr6+ from tap water, 96.81% from industrial effluent, and 94.57% from treated sewage wastewater. Furthermore, the PU@nZVI maintained its efficiency over five adsorption–desorption cycles, highlighting its reusability. These results suggest that the PU@nZVI nanocomposite is a highly efficient and sustainable option for chromium(VI) removal in water treatment applications.

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