Isolation of naproxen from wastewater using carbon-based magnetic adsorbents

Abstract

Naproxen is one of the mostly used drugs worldwide and is most abundant in wastewater. This study aims to adsorb naproxen from wastewater using magnetically modified carbon-based adsorbents. These adsorbents have very large specific area for naproxen adsorption, and magnetite modification provides easy separation and regeneration. The co-precipitation method was used for magnetic modification. Adsorption process was carried out in batches. The effect of adsorption variables was investigated. Langmuir, Freundlich, and Dubinin-Radushkevich isotherms were applied to the equilibrium data. The maximum adsorption capacities of adsorbents from Langmuir isotherm were found as 20.75 mg/g for magnetic multiwall carbon nanotubes and 87.79 mg/g for magnetic activated carbon. Pseudo-first-order kinetic model, pseudosecond-order kinetic model, intra-particle diffusion model, and Bangham model were used for determination of adsorption mechanisms. The rate-limiting step is electron exchange between the adsorbent and adsorbate. Both film diffusion and intra-particle diffusion occur while the adsorption process. DG°, DS°, and DH°were calculated for the process.

Adsorptive Removal of Pharmaceuticals and Personal Care Products from Water with Functionalized Metal-organic Frameworks: Remarkable Adsorbents with Hydrogen-bonding Abilities

“…Table 2 compares the maximum adsorption capacities ( Q 0 ) and amounts adsorbed at equilibrium ( q 24 h , after 24 h) of studied adsorbents. Table 2 shows that the MIL-101-OH was very competitive when compared to studied adsorbents such as activated carbon 11 56 57 58 , bone char 15 , and mesoporous materials with and without modifications (SBA-15 11 and MCM-41 12 ), showing the potential applications of MIL-101-OH for adsorptive removal of naproxen from water.…”

Adsorption of diclofenac on activated carbon and its hypochlorination in the presence of dissolved organic matter

“…This experimental condition was principally selected to demonstrate the effect of humic substances on the adsorption of DCF. There are, however, literature indications (Saleh and Gupta, 2014;İlbay et. al., 2015) that lower pH favors the adsorption of anionic pollutants on certain carbonaceous surfaces.…”

Synthesis and Characterization of Chitosan/Agar/SiO2 Nano Hydrogels For Removal of Amoxicillin and of Naproxen From Pharmaceutical Contaminants

“…So far, various methods have been used to remove pharmaceutical contaminants from wastewater, including membrane processes, chemical oxidation, ionic and biological treatment, photofenton decomposition and adsorption, as well as adsorbents such as activated carbon, ash and zeolite [6,32,33]. Therefore, the synthesis of adsorbents based on nanoparticles with high surface area, high porosity and adsorption capacity, as well as the ability to separate quickly and easily is essential.…”

“…Also, according to the reports of the US Food and Pharmaceutical Administration (FDA), the concentration of ingredients in pharmaceutical released into the environment is about 0.1 µg/l [4]. Naproxen is a non-steroidal antiin ammatory pharmaceutical that does not contain corticosteroids, which block the production of prostaglandins, which are responsible for causing pain and in ammation in the affected area [5,6]. Amoxicillin, a component of the antibiotic β-lactam, binds to the penicillin-binding protein (PBP) to inhibit trans peptidases and inhibit the production of bacterial cell wall peptidoglycans, thereby destroying the bacterial cell wall.…”