Novel composite sorbents based on carbon fibers decorated with ferric hydroxides—Arsenic removal

Abstract

Carbon fibers (CF) were prepared by carbonization of cellulose and further deposited with ferric hydroxide (CF–Fe). The synthesized CF and CF–Fe composites were employed to remove arsenate from aqueous solution. CF–Fe samples with different amount of Fe (3, 7, 11, and 20 wt.%) were characterized using SEM‐EDX, XPS, FTIR, BET, pH titration, and zeta potential measurements. Batch isotherm studies were performed to determine the As (V) adsorption performance of both raw CF and CF–Fe. CF–Fe composites exhibited significantly higher As (V) adsorption capacity compared with raw CF, namely, 167.95 versus 412.8 μg/g and for raw CF and CF–Fe (3%), respectively. The presence of Cl− and SO42− only slightly affected the As (V) adsorption, whereas competitive adsorption displayed the highest influence of PO43−, followed by F− and CO32−. The results revealed that both coulombic interactions and surface complexation reactions play important role in the As (V) adsorption process.

Simultaneous degradation of glucocorticoids and sterilization using bubbling corona discharge plasma based systems: A promising terminal water treatment facility for hospital wastewater

“…During sole ACF treatment, the adsorption process of HC and BT to ACFs fitted into the Langmuir model (Text S4) with R 2 values above 0.92 ( Fig. S6 a and b), indicating that the adsorption of GCs occurred at specific homogeneous positions on the surface of ACF [52] . In addition, the pseudo-second-order model was more consistent with the adsorption kinetics of GC on ACF ( Fig.…”

“…ROS play an important role in the process of bacterial inactivation [25] . After modification by iron, newly formed Fe-O (530 cm −1 ) tensile vibration (attributed to the bending of the FeO(OH) groups [52] ) was observed in the FTIR spectra of the ACF surface ( Fig. 7 b), proving that iron was successfully loaded on the ACF surface.…”

Treatment of As(III)-Laden Contaminated Water Using Iron-Coated Carbon Fiber

“…As a green approach to water technology is the need of the hour, the use of functional materials for the removal of aquatic pollutants has intensified recently. Since the world's economy gradually shifts toward a CE [16], there is increasing pressure to substitute conventional materials with sustainable and renewable materials such as composites from unused resources, which often end up in landfill for disposal [17].…”