High surface area DPA-hematite for efficient detoxification of bisphenol A via peroxymonosulfate activation

Abstract

DPA-hematite was synthesized for bisphenol A detoxification via peroxymonosulfate (PMS) activation. Correlation between the initial oxone dosage, apparent rate constant and surface area was obtained. Acute toxicity study was conducted. The function of DPA in mediating the PMS activation is schematically illustrated.

Graphene encapsulated FexCoy nanocages derived from metal–organic frameworks as efficient activators for peroxymonosulfate

“…The PMS concentration was determined using an iodometric method. [30][31][32][33][34] Briefly, 200 μL of sample was withdrawn and immediately mixed with 1.8 mL of KI stock solution (0.166 g of KI + 0.04 g of NaHCO 3 )/100 mL. After reaction for 5 min, the mixture was analyzed by a UV-vis spectrophotometer at λ = 352 nm.…”

Hierarchically-structured Co–CuBi 2 O 4 and Cu–CuBi 2 O 4 for sulfanilamide removal via peroxymonosulfate activation

“…At t = 30 min, the Co concentration of the solution was also quantified using a ICP-OES (PerkinElmer, Elmer Optima 2000DV). The total organic carbon (TOC) was determined using a TOC analyzer (Shimadzu ASI-V TOC analyzer) while the PMS concentration was quantified using the iodometric method coupled with spectrophotometer [13]. To ensure reproducibility, each of the experiment was duplicated.…”

“…The sulfate-radical-based AOP is effective over a wide range of pH and can be more effective than hydroxyl radical ( • OH) due to its better selectivity for electron transfer reaction. Sulfate radical can be generated from the activation of peroxymonosulfate (PMS, commercially-known as Oxone ® ) by heterogeneous transition metal oxide catalyst [13,14]. The active transition metal species (M n+ ) in the solid catalyst can transfer one electron from its outer shell to homolytically cleave the peroxide bond ( O O ) of PMS to produce SO 4 •− as follows [15]: The oxidized transition metal is then reduced back to its original oxidation state by a one-electron reduction by PMS Eq.…”

Degradation of methylene blue with magnetic Co-doped Fe3O4@FeOOH nanocomposites as heterogeneous catalysts of peroxymonosulfate

“…In addition, supported and unsupported iron-based materials have been synthesized with remarkable performances including Fe 3 O 4 , 8 Fe 2 O 3 , 9 DPA-Fe 2 O 3 , 10 Fe 3 O 4 @Co/C, 11 CoFe 2 O 4 , 12 and FeOOH. 10,13 For instance, due to the characteristics of Fe 3 O 4 (e.g., easy preparation, high stability and convenient separation), it is an excellent material to catalyze PMS. 14 Moreover, iron oxide magnetic nanoparticles can effectively activate persulfate/PMS anions to produce sulfate-free radicals.…”