Enhanced use of foam fractionation in the photodegradation of perfluorooctane sulfonate (PFOS)

Photo-chemical/catalytic oxidative/reductive decomposition of per- and poly-fluoroalkyl substances (PFAS), decomposition mechanisms and effects of key factors: a review

“…195 Under the combination of foam fractionation, using 1 L min −1 N 2 flow, and photodegradation, using 500 W MP Hg lamp, PFOS decomposition rate was 8.8 times higher than that without foam fractionation. 194 The authors attributed this enhanced photodegradation to the enrichment of PFOS in the foam layer and longer transmission depth of UV irradiation in the foam layer rather than in the solution. 194…”

“…194 The authors attributed this enhanced photodegradation to the enrichment of PFOS in the foam layer and longer transmission depth of UV irradiation in the foam layer rather than in the solution. 194…”

“…Moreover, Lyu et al 194 recently studied coupled foam fractionation and photodegradation treatment of PFOS. Foam fractionation is a green and cost-effective technique in which rising foam serves as a medium to separate surface-active compounds (e.g., PFOS) from their dilute solutions.…”

“…195 Under the combination of foam fractionation, using 1 L min −1 N 2 flow, and photodegradation, using 500 W MP Hg lamp, PFOS decomposition rate was 8.8 times higher than that without foam fractionation. 194 The authors attributed this enhanced Environmental Science: Water Research & Technology Critical review photodegradation to the enrichment of PFOS in the foam layer and longer transmission depth of UV irradiation in the foam layer rather than in the solution. 194 Simultaneous operation of photochemical processes along with other degradation technologies is also expected to improve PFAS treatment through an increase in overall PFAS decomposition and a decrease in operational time or chemical consumption.…”

“…194 The authors attributed this enhanced Environmental Science: Water Research & Technology Critical review photodegradation to the enrichment of PFOS in the foam layer and longer transmission depth of UV irradiation in the foam layer rather than in the solution. 194 Simultaneous operation of photochemical processes along with other degradation technologies is also expected to improve PFAS treatment through an increase in overall PFAS decomposition and a decrease in operational time or chemical consumption. For instance, the combination of ultrasonic (US) and VUV radiations resulted in higher degradation efficiency of PFOS than that of the single US or VUV processes.…”