Carbon Bead‐Supported Ethylene Diamine‐Functionalized Carbon Nanofibers: An Efficient Adsorbent for Salicylic Acid

Abstract

The present study describes the removal of salicylic acid (SA) from water by adsorption using ethylene diamine (EDA)-functionalized carbon nanofibers (CNFs)-containing porous carbon beads ($0.5 mm). Briefly, the phenolic beads, separately synthesized using suspension polymerization, were carbonized and activated. The CNFs were grown on the carbon beads, using chemical vapor deposition, and the prepared fibrous beads functionalized with EDA were used as an adsorbent for SA. The prepared materials were characterized by their physico-chemical properties, including specific surface area, surface morphology, and surface functional groups. The adsorption tests performed over the initial SA concentration range of 100-1500 mg/L revealed the adsorption capacity of the materials to be $682 mg/g, which was considerably larger than that of the adsorbents discussed in the literature for SA. The zeta-potential analysis attributed enhanced adsorption to the electrostatic interaction and hydrogen bonding between the solute molecules and the EDA-functionalized surface of the CNFs. The material and method developed in this study for the remediation of the SA-laden wastewater may be extended to other acidic pollutants present in pharmaceutical effluents.

Nanoconfined Liquid Phase Nanoextraction Based on Carbon Nanofibers

“…Furthermore, their values are statistically not different (α = 0.05) until 1800 s (30 min), while after this time, % desorbed underwent a sudden decrease. This behavior is due to the occurrence of a competing process that can be tentatively explained considering the possibility that the analyte is slowly and strongly adsorbed on the CNF surface, inhibiting the successive release into the desorption solvent. Similar behaviors have been noticed with other analytes with different recoveries and time dependencies.…”

Polymeric Nanocomposite-Based Agriculture Delivery System: Emerging Technology for Agriculture

“…Carbon-based nanomaterials exhibited various end applications such as environmental remediation, sensors, drug delivery, antibacterial agents, crop protection, and growth regulator of the plants due to unique characteristics, mainly optical, electrical, mechanical, and thermal properties. The significant development has been done in the synthesis of carbon-based nanomaterials such as activated carbon, activated carbon fibers, CNTs, CNFs, graphene, and fullerenes, which have great interest in agriculture due to their possibility as a growth stimulant and protection of crops [66][67][68][69][70][71][72][73][74][75][76][77][78][79]. Moreover, these carbon-based nanomaterials, mainly CNTs, and CNFs, have the potential ability to penetrate seed coat as well as translocation ability within the plants from root to shoot to leaves.…”

Strategic Doping Approach of the Fe–BiOI Microstructure: An Improved Photodegradation Efficiency of Tetracycline

“…The supply of nonpolluted water globally is one of the great challenges with the escalating demand as a mounting population. Usually, water crisis is mainly due to the various contaminants such as heavy metal ions, pharmaceuticals, polyphenols, and dyes, and so forth. − The contamination of pharmaceutical antibiotic compounds such as ampicillin, ciprofloxacin, tetracycline (TC), oxytetracycline, salicylic acid, and so forth is of major concern due to their extensive use in medical treatment. TC is the second largest produced antibiotic, which has been extensively used in human and animal treatments against bacterial infection.…”

“…However, due to the poor metabolization rate and incomplete utilization in the human body, it can enter the ecosystem in its active form, thereby easily developing antibiotic resistance. Also, antibiotic residues in the environment result in chronic and acute toxicity in humans and animals. − Therefore, it is necessary to remove the residual of TC antibiotics from the ecological system. To treat water crisis-related issues, advancement in available technologies for the complete degradation of contaminants from the aqueous environment is needed to fulfill the future requirement.…”