Efficient mineralization of a novel fluorotelomer surfactant, 2H,3H,3H,5H,5H,6H,6H-4-thia-perfluoro(2-methyl)-1-dodecanoic acid, in superheated water induced by a combination of potassium permanganate and dioxygen

Hori, Hisao; Ushio, Tomoki; Asai, Takuma; Honma, Ryo; Eid, Nadim; Améduri, Bruno

doi:10.1016/j.cej.2020.127006

Cited by 4 publications

(1 citation statement)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pH value increased with increasing [KMnO 4 ]. This is due to the OH – formation from the reaction between KMnO 4 and water (eq ), and the in - situ -formed MnO 2 is likely to act as the real oxidizing agent …”

Section: Resultsmentioning

confidence: 99%

Oxidative Mineralization of Poly[vinylidene fluoride-co-2-(trifluoromethyl)acrylic acid] Copolymers in Superheated Water

Hori

Honma

Igarashi

et al. 2022

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

The decomposition of functional fluoropolymers poly[vinylidene fluoride-co-2-(trifluoromethyl) acrylic acid] copolymers, [poly(VDF-co-MAF)], in superheated water was investigated as the first example of the decomposition of these copolymers aimed at recycling the fluorine element. Such statistical copolymers were prepared from the conventional radical copolymerization of VDF and MAF in two different feed molar ratios leading to different VDF/MAF molar ratios (90/10 and 58/42 molar percentages). Their degradation was achieved in the presence of two oxidizing agents. By the use of KMnO4 (25–158 mM), these poly(VDF-co-MAF) copolymers efficiently generated F– ions and resulted in low total organic carbon (TOC) content in the reaction solutions. Specifically, when the copolymer containing a 90 mol % VDF was treated with aqueous KMnO4 (158 mM) at 250 °C for 6 h, the F– yield reached 83% and the remaining amount of TOC decreased to 4% of the carbon atom amount in the initial copolymer. Likewise, for the same treatment of the other copolymer (58 mol % VDF), the F– yield reached 90% while the remaining TOC ratio was 4%. Compared to KMnO4, H2O2 induced a lower copolymer mineralization. Adding Ca(OH)2 to the solutions from superheated water treatment with KMnO4 and a subsequent washing procedure gave pure CaF2.

show abstract

Section: Resultsmentioning

confidence: 99%

Oxidative Mineralization of Poly[vinylidene fluoride-co-2-(trifluoromethyl)acrylic acid] Copolymers in Superheated Water

Hori

Honma

Igarashi

et al. 2022

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

show abstract

Thermal decomposition of perfluorinated carboxylic acids: Kinetic model and theoretical requirements for PFAS incineration

2022

View full text Add to dashboard Cite

Mineralization of Next-generation Per- and Polyfluorinated Alkyl Substances by Use of Superheated Water

Hori

2022

Perfluoroalkyl Substances

View full text Add to dashboard Cite

Per- and polyfluoroalkyl substances (PFASs) show unique characteristics such as high thermal and chemical stability, high surface activity, and no light-absorbing ability. As a result, they have been used in a wide variety of industrial and consumer applications. Although PFASs show many functionalities, they have environmentally negative features: high persistence in the environment and bioaccumulation [especially perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA)], and difficulties with waste treatment and recycling. In order to reduce the environmental impact of and to construct a recycling system for PFASs, it is necessary to convert their wastes to fluoride ions (i.e. mineralization). This chapter describes effective methodologies to mineralize next-generation PFASs (PFOS/PFOA alternative compounds and fluorinated ionic liquids) by use of superheated water combined with reductive or oxidative agents.

show abstract

Efficient mineralization of a novel fluorotelomer surfactant, 2H,3H,3H,5H,5H,6H,6H-4-thia-perfluoro(2-methyl)-1-dodecanoic acid, in superheated water induced by a combination of potassium permanganate and dioxygen

Cited by 4 publications

References 50 publications

Oxidative Mineralization of Poly[vinylidene fluoride-co-2-(trifluoromethyl)acrylic acid] Copolymers in Superheated Water

Oxidative Mineralization of Poly[vinylidene fluoride-co-2-(trifluoromethyl)acrylic acid] Copolymers in Superheated Water

Thermal decomposition of perfluorinated carboxylic acids: Kinetic model and theoretical requirements for PFAS incineration

Mineralization of Next-generation Per- and Polyfluorinated Alkyl Substances by Use of Superheated Water

Contact Info

Product

Resources

About