A highly dispersed magnetic polymetallic catalyst to activate peroxymonosulfate for the degradation of organic pollutants in wastewater

Abstract

Oxytetracycline (OTC), a broad-spectrum antibiotic, has posed considerable risk to ecosystem because of its resistance to adsorption and the inefficiency in biodegradation. In this study, nitrogen-sulfur co-doped graphene oxide anchored...

High-efficiency nickel recovery from spent electroless nickel plating solution: effective degradation of high-concentration nickel complexes to form a nickel ferrite nanomaterial via Fe3O4 catalytic oxidation

“…45 The XPS spectrum of C 1s (Fig. 7d) had peaks at 283.5, 285.6, and 289.0 eV, which were related to C-C/CC, C-OH, and CO, [46][47][48][49] and they indicated the presence of small organic molecules on the surface of the product. The XPS peak at 132.8 eV (Fig.…”

Understanding the active sites and associated reaction pathways of metal-free carbocatalysts in persulfate activation and pollutant degradation

“…4a and b. 62 Reduction treatments are effective in increasing the ratio of sp 2 -to sp 3 -hybridized carbon, thus bringing more active sp 2 carbon sites and lowering the inactive sp 3 carbon sites. 61 The free-flowing electrons provided by the conjugated π network can activate PMS/PDS into free radicals based on the following eqn (1) and (2).…”

“…The increasing environmental pollution with the fast development of various industries calls for efficient and lowcost methods to remove the toxic and refractory pollutants from water radically. [1][2][3][4] The current methods involve adsorption, [5][6][7] Fenton oxidation, 8,9 Fenton-like oxidation, 10,11 electro-Fenton, 12,13 photo-Fenton, 14,15 electrochemical oxidation, 16,17 photocatalysis [18][19][20][21] and others. [22][23][24][25][26] Among these methods, Fenton-like oxidation based on peroxomonosulfate (PMS) and peroxydisulfate (PDS) has attracted significant attention due to its long life spans, strong oxidation ability, ease of storing and transporting PMS/PDS relative to liquid H 2 O 2 , applicability to a diversity of refractory organic pollutants, and capability to withstand a wide pH range, which is superior to the Fenton process requiring H 2 O 2 as the reactant, thus causing the storage and delivery to be difficult.…”

Unveiling the mechanism of visible light-assisted peroxymonosulfate activation and carbamazepine degradation using NH2-MIL-125(Ti)@MIL-53(Fe/Co) heterojunction photocatalyst

“…23 Generally, the activation methods include exposure to ultraviolet (UV) light, heat, ultrasound, transition metal ions and metal oxides. [24][25][26][27][28][29][30] The activation of PMS and PDS by UV light and ultrasound is energy intensive, whereas that by heat is only applicable for small-scale processes. In contrast, visible light-driven catalytic processes for the activation of PMS/PDS is a suitable technique for the facile generation of SO 4 ˙− and ˙OH radicals.…”