Preparation of magnetic nanoparticles functionalized with poly (styrene‐2‐acrylamido‐2‐methyl propanesulfonic acid) as novel adsorbents for removal of pharmaceuticals from aqueous solutions

Abstract

This work describes the removal of three pharmaceuticals, namely ceftriaxone sodium (CFX), diclofenac sodium (DCF) and atenolol (ATN) from water using magnetic poly (styrene-2-acrylamido-2-methyl propanesulfonic acid) (St-AMPS) adsorbent. This adsorbent was characterized by several techniques such as FTIR, TEM, TGA, VSM and DLS. Three kinetic models, pseudo-first-order, pseudo-secondorder and intra-particle diffusion models were used to study the adsorption kinetics.The results showed that the adsorption kinetics of pharmaceuticals onto magnetic poly (St-AMPS) adsorbent followed the pseudo-second-order model and were relatively rapid. In addition, it was found that the intra-particle diffusion was not the sole rate-controlling step and the adsorption of pharmaceuticals onto adsorbent occurred via two steps adsorption process. The experimental data were fitted with three isotherm models including Freundlich, Langmuir and Dubinin-Radushkevich (D-R). It was found that the adsorption of pharmaceuticals onto magnetic poly (St-AMPS) nanoparticles was the best described by the Langmuir model. Maximum adsorption capacities of 150.602, 47.824 and 119.904 mg/g were obtained for DCF, ATN and CFX, respectively. Also the obtained free energy from D-R isotherm (6.19, 4.93 and 6.45 kJ/mol for DCF, ATN and CFX respectively) indicated that the adsorption process was a physiosorption. Magnetic poly (St-AMPS) adsorbent could be recycled for removal of CFX, DCF and ATN by alkaline aqueous solution (pH 8). Therefore, this adsorbent can act as a promising adsorbent for water treatment processes. K E Y W O R D Sadsorption, magnetic separation, pharmaceutical, poly (styrene-2-acrylamido-2-methyl propanesulfonic acid), regeneration

Smart Adsorbents for Aquatic Environmental Remediation

“…[191] Diclofenac (DCF), atenolol (ATN) and ceftriaxone (CFX) were efficiently adsorbed from water by St-AMPS, a magnetic poly (styrene-2-acrylamido-2-methyl propanesulfonic acid) that was synthesized by mini-emulsion polymerization, using hydrophobic magnetite NPs coated with oleic acid. [192] St-AMPS (M S : 48 emu g −1 ) displayed adsorption capacities of 151, 48, and 120 mg g −1 for DCF, ATN, and CFX, respectively, with good alkaline (pH: 8) regeneration potential and reusability during four cycles. [192] Magnetic molecularly imprinted polymers (MIPs), which are highly selective for organics thanks to their tailor-made binding sites, have become a research hotspot for pharmaceuticals removal.…”

Study on Magnetic Materials for Removal of Water Pollutants

“…Recently, M. Hayasi and his coworker described the use of magnetic poly (styrene-2-acrylamido-2-methyl propanesulfonic acid) (St-AMPS) as adsorbent for removal of the pharmaceuticals viz. ceftriaxone sodium, diclofenac sodium, and atenolol from water [69].…”

Bioconjugate synthesis, phytochemical analysis, and optical activity of NiFe2O4 nanoparticles for the removal of ciprofloxacin and Congo red from water

“…Recently magnetic poly (styrene-2-acrylamido-2-methyl propanesulfonic acid) and magnetic (1,2,4,5-benzenetetracarboxylic acid) nanomaterials have been proved very effective for the removal of pharmaceuticals viz. atenolol, diclofenac sodium and ceftriaxone sodium and Congo red dye from water respectively 22 , 23 .…”