Study on Cost-Efficient Carbon Aerogel to Remove Antibiotics from Water Resources

Abstract

Because of pharmaceutical-emerging contaminants in water resources, there has been a significant increase in the antibiotic resistance in bacteria. Therefore, the removal of antibiotics from water resources is essential. Various antibiotics have been greatly studied using many different carbon-based materials including graphene-based hydrogels and aerogels. In this study, carbon aerogels (CAs) were synthesized from waste paper sources and their adsorption behaviors toward three antibiotics (hygromycin B, gentamicin, and vancomycin) were investigated, for which there exist a limited number of reports in the literature. The prepared CAs were characterized with scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and micro-computerized tomography (μ-CT). According to the μ-CT results, total porosity and open porosity were calculated as 90.80 and 90.76%, respectively. The surface area and surface-to-volume ratio were found as 795.15 mm 2 and 16.79 mm –1 , respectively. The specific surface area of the CAs was found as 104.2 m 2 /g. A detailed adsorption study was carried out based on different pH values, times, and analyte concentrations. The adsorption capacities were found as 104.16, 81.30, and 107.52 mg/g for Hyg B, Gen, and Van, respectively. For all three antibiotics, the adsorption behavior fits the Langmuir model. The kinetic studies showed that the system fits the pseudo-second-order kinetic model. The production of CAs, within the scope of this study, is safe, facile, and cost-efficient, which makes these green adsorbents a good candidate for the removal of antibiotics from water resources. This study represents the first antibiotic adsorption study based on CAs obtained from waste paper.

Optimization of the removal of the antibiotic ciprofloxacin by composite aerogels based on PVA/agar/maltodextrin

“…A study by Meltem Okan and colleagues on the antibiotic adsorption capacity of carbon aerogel materials showed that as the concentration of the substance increases, the adsorption capacity increases steadily, then reaches a maximum value, and then decreases to equilibrium. 29…”

“…A study by Meltem Okan and colleagues on the antibiotic adsorption capacity of carbon aerogel materials showed that as the concentration of the substance increases, the adsorption capacity increases steadily, then reaches a maximum value, and then decreases to equilibrium. 29 Research on adsorption isotherm models. The CFX adsorption isotherm models on experimental data of AE materials are converted into various forms based on the adsorption isotherm models: Langmuir, Freundlich, Temkin, and D-R.…”

Carbon based materials: a review of adsorbents for inorganic and organic compounds

“…2.6.2 Application. The ability to prepare CAs emerges from their unique properties for the adsorptive removal of various organic and inorganic substances, including metals, 311,312 dyes, 313,314 antibiotics, 315,316 volatile organic compounds, 317 organic solvents, 318 oils, 285,319 CO 2 , 320 and H 2 S. One of the highly discussed applications of CA in chemistry is its potential applicability in the adsorption of organic compounds, especially common hazardous materials. Generally, the presence of oxygen, nitrogen, and sulfur groups on the surface of the CBMs, especially CAs, can increase the porosity, hydrophilicity and selectivity of the adsorbents.…”

Implementation of an Aerogel in Civil Engineering - A Review

“…Here, the high surface area of aerogel offers it high adsorption capacity; hence they are also applicable in the treatment of wastewater. Carbon aerogel is a good adsorbent for the removal of antibiotics from water resources [35] and CA electrodes are suitable for chromium removal (depending on pH) [34] .…”

“…Recent studies show economically affordable aerogel-based materials and construction works assisted with them [35], [40],…”