Preparation of polydopamine-coated graphene oxide/Fe3O4 imprinted nanoparticles for selective removal of fluoroquinolone antibiotics in water

Abstract

Antibiotics in water have recently caused increasing concerns for public health and ecological environments. In this work, we demonstrated polydopamine-coated graphene oxide/Fe3O4 (PDA@GO/Fe3O4) imprinted nanoparticles coupled with magnetic separation for fast and selective removal of fluoroquinolone antibiotics in water. The nanoparticles were prepared by the self-polymerization of dopamine using sarafloxacin as a template. The imprinted PDA film of 10~20 nm uniformly covered the surface of GO/Fe3O4 providing selective binding sites. The nanoparticles showed rapid binding and a large capacity (70.9 mg/g). The adsorption data fitted well the Langmuir and pseudo-second order kinetic equations. The nanoparticles could be easily separated by a magnet following the adsorption and then regenerated by simple washing for repetitive adsorptions. The nanoparticles were successfully used for the removal of fluoroquinolone antibiotics in seawater, with removal efficiencies of more than 95%. The proposed strategy has potentials for efficient removal of antibiotics in environmental water.

Devising and Exploiting Functionalities of Nanocomposites for Removal of Organic Pollutants and for Disinfection

“…A large number of nanomaterials have been reported for the removal of API pollutants that include graphene-based nanomaterials, iron-and titatium-based nanoparticles, metal organic frameworks, and polymer-based nanomaterials [17,21,69,70]. Agarwal et al [71] synthesized Fe-doped SnO 2 /Co 3 O 4 nanocomposites under UV light for photocatalytic degradation of metronidazole antibiotic.…”

A Comparison between Different Agro-wastes and Carbon Nanotubes for Removal of Sarafloxacin from Wastewater: Kinetics and Equilibrium Studies

“…Therefore, finding a suitable approach for removal of SARA is crucial. Many investigations for removal of SARA from contaminated samples were reported using different approaches including mainly photocatalytic degradation, photolysis, adsorption and combinations of these approaches [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. Being simple and easy to manipulate with the opportunity of being performed utilizing available materials with no production of toxic byproducts, adsorption is usually seen as one of the most promising approaches for wastewater treatment.…”

“…Being simple and easy to manipulate with the opportunity of being performed utilizing available materials with no production of toxic byproducts, adsorption is usually seen as one of the most promising approaches for wastewater treatment. Common adsorbents include conventional materials (e.g., commercially available activated carbons and alumina), natural materials (e.g., clay and sand), agro-wastes (AWs) both in their raw format and as activated carbons (ACs) following thermal treatment, hybrid materials, industrial waste products, graphene, carbon xerogels, and carbon nanotubes (CNTs) [ 2 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ].…”

Synthesis and characterisation of a selective adsorbent based on the molecularly imprinted polymer for the removal of cloxacillin antibiotic residue from milk

“…Such absorbents are supposed to be stable enough in basic and acidic environments. Nowadays, a new generation of polymeric adsorbents with unique properties is used by researchers to reduce compounds in aqueous media (Tan et al, ). These novel adsorbents possess certain characteristics including selective adsorption, high adsorption capacity, large specific surface, chemical, thermal and mechanical stability, re‐usability, and applicability in aqueous and petroleum media.…”