KOPRI Repository

Activation of peroxymonosulfate by bicarbonate and acceleration of the reaction by freezing

Cited 4 time in wos
Cited 5 time in scopus
Activation of peroxymonosulfate by bicarbonate and acceleration of the reaction by freezing
Other Titles
중탄산염에 의한 과산화일황산염의 활성화와 동결에 의한 반응속도의 가속화 연구
Ahn, Yong-Yoon
Kim, Jungwon
Kim, Kitae
Environmental Sciences & Ecology
PeroxymonosulfateBicarbonateOxidationFreeze-concentration effectWater treatmentOrganic pollutant
Issue Date
Ahn, Yong-Yoon, Kim, Jungwon, Kim, Kitae. 2021. "Activation of peroxymonosulfate by bicarbonate and acceleration of the reaction by freezing". SCIENCE OF THE TOTAL ENVIRONMENT, 785: 1-9.
This study demonstrates the positive effects of dissolved bicarbonate and carbonate anions on peroxymonosulfate (PMS) induced oxidation and the remarkable acceleration of the reaction by freezing. More than 90% of the initial 4-chlorophenol (4-CP) decomposed in the frozen case, whereas only less than 20% of the 4-CP was removed in the aqueous case in the same time period. This accelerated reaction is attributed to the freeze-concentration of the dissolved substrates (i.e., PMS, bicarbonate, and pollutants) in the quasi-liquid layer at the ice grain boundaries between ice crystals. The reaction between bicarbonate and PMS was found to be unique because none of the effects were observed in the phosphate and hydroxide cooperated system with freezing, although the base activation of PMS could participate under basic conditions (pH > 9). Based on electron paramagnetic resonance spectroscopy measurements and comparison with the photo-excited Rose Bengal system as a reference system for singlet oxygen (1O2) generation, 1O2 was found to have a minor effect on the oxidation of 4-CP in the frozen bicarbonate-PMS system. While, direct electron transfer from the target organic substrate to the PMS was suggested as a major mechanism of 4-CP oxidation, because the selected target organic substrates were decomposed with different tendencies, and the consumption of PMS was accelerated by the presence of an electron donating compound. The results show the potential applicability of the freezing phenomenon, which occurs naturally in the mid-latitude and polar area, to help a decomposition of water dissolved organic pollutants by the imitation of the natural purification process.
Appears in Collections  
2021-2021, Development of potential candidates as antibiotics based on polar genetic resources (21-21) / Lee, Jun Hyuck (PM21030)
2021-2021, Investigation of ice microstructure properties for developing low-temperature purification and environment/energy materials (21-21) / Kim, Kitae (PE21120)
Files in This Item

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.