Fabrication and Characterization of Highly Porous Fe(OH)₃@Cellulose Hybrid Fibers for Effective Removal of Congo Red from Contaminated Water

Abstract

Research on water purification has recently revolved around nanomaterials because of their large specific surface area. However, there are still some problems associated with the preparation, application, and recovery of nanomaterials. Herein, we report for the first time a novel approach for one-step synthesis of porous hybrid fibers (PHFs), which can be used as an effective adsorbent for dye removal from polluted water. A lowcost biopolymer cellulose was chosen as the matrix of the fibers, whereas a NaOH solution was applied as the coagulation bath for the cellulose spinning dope that contained a certain amount of FeCl 3 . The obtained Fe(OH) 3 @Cellulose PHFs exhibited a multiscaled pore structure, with the in situ generated Fe(OH) 3 nanoparticles uniformly distributed on the regenerated cellulose nanofibrous network of the fibers. These structural attributes are quite advantageous for an efficient adsorbent. The maximum Congo red removal capacity of the Fe(OH) 3 @Cellulose PHFs reached 689.65 mg/g, which was much higher than many early reported values. Importantly, the Fe(OH) 3 @Cellulose PHFs could favorably remove the dye at natural pH through filtration adsorption with excellent reusability. This approach, with the desired characteristics of simplicity, high efficiency, low cost, and being environmentally friendly, demonstrated a great potential for industrial applications.

Synthesis of a Novel Composite Sorbent Coated with Siderite Nanoparticles and its Application for Remediation of Water Contaminated with Congo Red Dye

“…The most important character of the prepared composite sorbent was its high maximum sorption capacity which was 9416 mg/g as illustrated in Table 3. This value was greater than the findings of the previous studies (Yang et al 2015;Zheng et al 2017Zheng et al , 2019Zhao et al 2017;Bao et al 2019) as shown in the Table 4 and, accordingly, the present composite sorbent coated with siderite nanoparticles manufactured from byproduct wastes can be used as substitute option for many industrial sorbents. In addition, the nonlinear fits for the kinetics results using kinetic models proved that the Pseudo second order model exhibits higher R 2 and lower value of sum of squared errors (SSE) in comparison with the Pseudo first order model ( Fig.…”

Superb adsorption capacity of biochar derived from leather shavings for Congo red

“…4e). 13 Furthermore, we found that the adsorption capacity of LSB for Methyl orange (MO, Scheme 2 and Fig. S4 †), which also has -N]N-and -SO 3 À groups, is lower than that for CR.…”

“…51,52 The peak of biochar-CR was broadened, which indicated that hydrogen bonds form between the O-H groups of biochar and the -NH 2 groups of CR. 13 In other words, CR adsorption on LSB occurs via chemical adsorption. XPS measurements were also performed on biochar-CR ( Fig.…”

Mesoporous Fe–Al-doped cellulose for the efficient removal of reactive dyes

“…The XRD pattern of FADC (Fig. 3b) shows additional peaks at 2θ = 36.99⁰ and 44.62⁰ corresponding to interaction between (110) planes of Fe 2 O 3 and Al 2 O 3 respectively 33 .…”