Chemical deposition of iron nanoparticles (Fe0) on titanium nanowires for efficient adsorption of ciprofloxacin from water

Abstract

The development of antimicrobial resistance genes (AMRs) in water was globally accelerated due to the occurrence of ciprofloxacin (CIP) in water. This study aims to precipitate iron nanoparticles (Fe0) on the surface of titanium nanowires (TNWs) through a chemical process to overcome the limitations of Fe0 and efficiently remove CIP from water. TEM and XRD results confirmed the successful synthesis of Fe0 and TNWs. They also proved the successful deposition and dispersion of Fe0 on TNWs. Several (Fe0/TNW) nanocomposites were synthesised with different percentages of TNWs (5, 10, 20, 30, and 50%) to define the best TNWs ratio that will decrease the aggregation of Fe0 nanoparticles and achieve an outstanding removal efficiency of CIP. (Fe0/TNW) nanocomposite with 20% of TNW was nominated as the best nanocomposite because it demonstrated a promising performance, compared with other nanocomposites, by removing more than 67% of CIP with insignificant desorption behaviour during the treatment period (120 min). Dosage of (20%-Fe0/TNW), initial pH of CIP solution and reaction temperature were optimized through a group of batch experiments to efficiently remove CIP from water. The optimum removal of CIP was obtained by 1 g L−1 of (20%-Fe0/TNW) nanocomposite at initial pH of 7 under 35 °C.

Enhanced Arsenic Removal from Aqueous Solutions Via Magnesium Hydroxide Coated Iron Nanoparticles

“…Moreover, the magnitude of enthalpy change (ΔH = 145.69 kJ/mol) suggested that the removal mechanism also involves a chemisorption process, which can be attributed to As(V) reduction to As(III) and the possible co-precipitation of As(III) with the released Fe 2+ . The initial concentration effect on As(V) removal by nFe 0 @Mg(OH)2 was studied considering different values (5,10,20, and 40 mg/L). The results clearly indicated the potential of nFe 0 @Mg(OH)2 to satisfactorily remove As(V), even at extreme As(V) concentrations, where it exhibited final removal efficiency of around 88% of 40 mg/L initial As(V) concentration (Fig.…”

“…nFe 0 was prepared via the chemical reduction of FeCl3 precursor by NaBH4 reductant, following the exact synthesis conditions reported in our previous work [19][20][21]. nFe 0 @Mg(OH)2 was synthesized by the thermal deposition of Mg 2+ precursor on nFe 0 surface via OHlinking within ethanol medium at 50 ± 1.0 °C [16,22].…”

Ciprofloxacin Removal from Aqueous Media Using Floating Treatment Wetlands Supported by Immobilized Bacteria

“…With the rapid increase in the human population and farm animals, use of antibiotics has increased all over the world. This results in a significant increase in antibiotic load in surface waters [14,15]. CIP has been found in drink-ing water (0.032 µg L −1 ), lake water (6.5 mg L −1 ) [16], sewage (11-99 µg L −1 ) [17], hospital wastewater (150 µg L −1 ) [18], and pharmaceutical industry effluent (31-50 mg L −1 ) [19,20].…”

Effect of water matrix on ligand-assisted adsorption of ciprofloxacin from aqueous solutions by zerovalent iron nanoparticles

“…Residues of antibiotics are released to the environment through the effluents of domestic, industrial, and hospital wastewater treatment plants, landfill sites, various veterinary applications (e.g., aquaculture, poultry and livestock farms, etc. ), and so forth [6,7]. Despite the great benefits in the human and veterinary medicine, the persisting and bioaccumulation of antibiotics in the environment especially the limited water resources are suspected of causing serious health and ecological issues.…”

“…), emulsification, oxidant addition (i.e., hydrogen peroxide), and organic ligands addition (e.g., oxalate, etc.) [7,20,21]. Our previous article demonstrated that the adding 0.3 mM of the organic ligan oxalate to 0.3 g L -1 of Fe 0 nanoparticles enhanced the adsorption of CIP from 45.04% (Fe 0 ) to 95.74% (Fe 0 /oxalate) [4].…”