Canarium schweinfurthii stone-derived biochar: A promising adsorbent for crystal violet dye removal

Ani, Marcellinus O.; Menkiti, Matthew C.; Aniagor, Chukwunonso O.; Nworie, Cyril E.; Ochi, Daniel O.

doi:10.1016/j.rsurfi.2023.100144

Cited by 1 publication

(1 citation statement)

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“…For instance, TiO 2 ‐based NMs require artificial UV light for activation, which restricts their applicability to sunlight‐exposed regions. Similarly, graphene quantum dots, [ 23 ] graphene‐oxide‐doped hydrogels, [ 24 ] activated carbon, [ 25,26 ] biochar, [ 3,27–29 ] and metal–organic framework‐based NMs [ 30 ] often face difficulties in achieving efficient powder dispersion because of aggregation tendency and challenging recovery through centrifugation (or filtration), limiting their practical use. Additionally, carbon nanotubes, [ 31 ] despite their excellent adsorption properties, [ 32,33 ] may be expensive and pose potential health risks if released into the environment.…”

Section: Introductionmentioning

confidence: 99%

Waste‐Valorized Nanowebs for Crystal Violet Removal from Water

Maqbool,

Cavallini,

Lasemi

et al. 2024

Small Science

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Lightweight, metal‐free, sustainable, and reusable adsorbent materials are of paramount significance in addressing the challenges of wastewater treatment. Accordingly, semi‐crystalline nanocellulose (NC) is extracted from tissue paper waste and used to modify polyacrylonitrile (PAN) to produce electrospun nanowebs with strand diameters from ≈180–300 nm. The incorporation of NC into PAN is confirmed by infrared and Raman spectroscopy and X‐Ray diffraction. When tested for crystal violet (CV) adsorption, NC‐modified PAN (20% NC@PAN) exhibits the highest CV removal capacity, achieving 91–94% removal over three cycles each, demonstrating exceptional recyclability. In contrast, unmodified PAN significantly decreases in CV adsorption capacity (from 59% to 48% in the third cycle), possibly due to an increased (≈36%) nanofiber diameter. The adsorption kinetics, exhibiting pseudo‐second order, interparticle (in between nanofibers) diffusion, and Elovich kinetic models emphasize the role of multilayer CV adsorption through reversible chemical interactions. Confocal micro‐Raman spectroscopy unveils a multifaceted CV adsorption mechanism, suggesting both surface and multilayer diffusion, with NC‐enhancing interactions. These findings demonstrate the potential of NC‐modified PAN nanowebs as effective and environmentally sustainable adsorbents for removing CV from aqueous solutions, suggesting promising practical applications.

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