The use of aminated cotton fibers as an unconventional sorbent to remove anionic dyes from aqueous solutions

Abstract

This study aimed to investigate the sorption of anionic dyes (Reactive Black 5, Reactive Yellow 84, Acid Red 18, and Acid Yellow 23) by cotton fibers aminated with epichlorohydrin and ammonia water (ACFs) as well by unmodified cotton fibers (CFs). CFs and ACFs were characterized based on FTIR, elemental analysis (C/N content) and pH PZC . The effect of solution pH (pH 2-11) and contact time on the removal of dye was studied as well. The kinetic experimental data were fitted to pseudo-first order, pseudo-second order, and intraparticle diffusion model. Equilibrium isotherms were analyzed based on Langmuir and Freundlich isotherms. The efficiency of dye sorption on CFs was the most effective at pH 2, whereas on ACFs-at pH 3-4. ACFs and CFs changed the pH value of the sorption solution. The system tended to obtain a pH value close to the pH PZC value of the sorbent (pH PZC = 7.85 for CFs/pH PZC = 8.15 for ACFs). ACFs had a shorter dye sorption equilibrium time compared to the CFs. The sorption of dyes on cotton sorbents proceeded in 2 main phases. The best match to the experimental data was shown by the pseudo-secondary model. Having amine functional groups, the ACFs ensured far better sorption of anionic dyes than CFs did. The maximum Reactive Black 5 sorption capacity of ACFs was Q max = 36.77 mg/g, which was 1240% higher than that of CFs (Q max-= 2.74 mg/g).

Novel Cellulose Derivatives Containing Metal (Cu, Fe, Ni) Oxide Nanoparticles as Eco-Friendly Corrosion Inhibitors for C-Steel in Acidic Chloride Solutions

“…With regard to PAC, the results showed that it is similar to unmodified cellulose, as the results showed the presence of the OH stretching with an increase in the bandwidth, which designates the presence of the -N-H. In addition, a weak band was observed with very small intensity at 1301 cm −1 , which designates the occurrence of expansion vibrations of the C-N bond, confirming the presence of an amino substitute in cellulose [50]. Moreover, Figure 1 shows FTIR spectra PAC/MONPs, and the obtained spec-tra revealed that the band that concerned OH converts to low intensity in PAC/NiONPs and disappeared in PAC/CuONPs and PAC/Fe 3 O 4 NPs.…”

“…In addition, a weak band was observed with very small intensity at 1301 cm −1 , which designates the occurrence of expansion vibrations of the C-N bond, confirming the presence of an amino substitute in cellulose. [50]. Moreover, Figure 1 shows FTIR spectra PAC/MONPs, and the obtained spectra revealed that the band that concerned OH converts to low intensity in PAC/NiONPs and disappeared in PAC/CuONPs and PAC/Fe3O4NPs.…”

In-Situ Deposition of Metal Oxides Nanoparticles in Cellulose Derivative and Its Utilization for Wastewater Disinfection

“…Moreover, a weak peak appeared with very low intensity at 1300 and 1630 cm −1 that indicates the stretching vibrations of the C–N bond and N–H bending vibration, respectively. This is evidence for the presence of the amine substituent on cellulose [ 32 ]. After the precipitation of nMO into Acell, there is a difference in the FTIR spectra of the Acell, as shown in Figure 1 C–E.…”

Adsorption of BEZAKTIV BLAU V3-R and BEZAKTIV BLAU S-2R reactive dyes onto rice husk modified by the circular economy concept

“…Several methods for purifying the reactive dyes colored effluent such as oxidation (Balcioglu et al 2001;El-Desoky et al 2010), coagulation (Vilaseca et al 2014), degradation (Yi et al 2020), photocatalysis (Fan et al 2019), ultrafiltration (Alventosa-de Lara 2012; Aouni et al 2012), adsorption (Janaki et al 2013;Jóźwiak et al 2020), electrocoagulation/adsorption (Bellebia et al 2009), photo-electrochemical treatment (Sala et al 2014), and nanofiltration (Sahraei et el. 2018) have been reported.…”