Degradation of sulfamethazine antibiotics in Fenton‐like system using Fe₃O₄ magnetic nanoparticles as catalyst

Abstract

In this study, Fe3O4 magnetic nanoparticles (MNPs) were synthesized, characterized and used for the degradation of sulfamethazine (SMT). The results showed that Fe3O4 MNPs were efficient and reusable heterogeneous catalytic for SMT degradation in a Fenton‐like system. More than 80% of the SMT was degraded under optimal conditions: initial pH of 3.0, 20 mM of H2O2, Fe3O4 MNPs dose of 1.0 g/L, and initial concentration of SMT 20 mg/L (initial total organic carbon: 10.4 mg/L). Among the parameters that affect SMT degradation, initial pH is of crucial importance to degrade SMT in the Fenton‐like system. A possible pathway of SMT degradation was proposed based on detected products in the solution. The Fe3O4 MNPs exhibited high stability and reusability. The SMT removal remained at 80% over five runs with the catalyst. Slight agglomeration and dissolution of Fe3O4 MNPs after reactions were observed by X‐ray diffraction and field emission scanning electron microscopy analysis. The SMT removal and mineralization could be enhanced using Fe3O4 MNPs/powder‐activated carbon (PAC) composite as catalyst. The removal efficiency of SMT and TOC increased to 94.7% and 80.8% in optimal conditions, respectively, in Fenton‐like system catalyzed by Fe3O4 MNPs/PAC composite. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 1743–1753, 2017

Synthesis and assessment of schwertmannite/few-layer graphene composite for the degradation of sulfamethazine in heterogeneous Fenton-like reaction

“…The performance of the catalysts in some other studies is shown in table 1 . Those catalytic materials generally need to be in a higher temperature (35–45°C) and a narrower pH (2–3.5) range in the catalytic degradation of sulfamethoxazole [ 65 , 69 , 70 ]. However, we found that the catalytic degradation efficiency of SMT (5 g l −1 ) by sch–FLG was around 100% at a lower temperature (28°C), and in a wide range of initial solution pH values (1–9).…”

Degradation of Acid Red 8 Dye Using Photo-Fenton Reaction Mediated by Titanium Modified Catalysts

“…Decrease of catalytic activity in heterogeneous process is often reported in the literature and is mainly related to agglomeration of the catalyst and occupation of reactive sites with degradation products. 1,54 Catalyst CAT3 was used in further experiments to evaluate other degradation parameters such as H 2 O 2 concentration and pH.…”

Facile Synthesis of CuO Nanosheets and Efficient Degradation of Rhodamine B in a Copper Oxide/Ascorbic Acid/Hydrogen Peroxide System: Kinetics, Fate of Ascorbic Acid, and Mechanism

“…Hydroxyl radicals, HO • , are powerful oxidants that are often used in water treatment to oxidize and degrade non‐biodegradable or persistent organic compounds. The classical homogeneous Fenton system (Fe 2+ /H 2 O 2 ) is the most efficient among various technologies for HO • production . However, this system has two drawbacks.…”