Surface modification of polyethylene microplastic particles during the aqueous-phase ozonation process

Rabia Zafar; Seon Yeong Park; Chang Gyun Kim

doi:10.4491/eer.2020.412

journal article Oct 07, 2020

Surface modification of polyethylene microplastic particles during the aqueous-phase ozonation process

Rabia Zafar Seon Yeong Park Chang Gyun Kim

Environmental Engineering Research Vol. 26 No. 5 pp. 200412-0 · Korean Society of Environmental Engineering

View at Publisher Save 10.4491/eer.2020.412

Abstract

Microplastics coexist with the chemical reactive oxygen species in natural waters, however, there is still a lack to elucidate the effect of these radicals on the microplastic surficial oxidation. In this study, the ozonation of polyethylene microplastics was carried out under varying ozone dosages ranging from 4 to 7 mg/min for 60, 120 and 180 min, where its ozone uptake was iodometrically compared and surficial modification was spectroscopically analyzed using FTIR and XPS. For that, the lowest ozone uptake was 16% at 4 mg/min ozone supplied for 60 min whereas the highest was observed of 44% at 7 mg/min ozone added for 180 min. Moreover, in the FTIR analysis, carbonyl (1,600-1,800 cm<sup>-1</sup>) and hydroxyl (3,200-3,600 cm<sup>-1</sup>) indices were improved more than 20% and 13% when they were ozonized at 7 mg/min for 180 min compared to 4 mg/min for 60 min, respectively. XPS also revealed that 7 mg/min of ozone supplied for 180 min provided the highest of oxygen functionalities, but while there was no significant change in C-C bond. It can be concluded that the surficial modification of PE including formation of oxygen functionalities could be more preferably influenced by the reaction time than ozone dosages.

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References

Details

Published: Oct 07, 2020
Vol/Issue: 26(5)
Pages: 200412-0

Authors

Funding

Ministry of Oceans and Fisheries

Korea Institute of Marine Science and Technology promotion Award: 20180341

Cite This Article

Rabia Zafar, Seon Yeong Park, Chang Gyun Kim (2020). Surface modification of polyethylene microplastic particles during the aqueous-phase ozonation process. Environmental Engineering Research, 26(5), 200412-0. https://doi.org/10.4491/eer.2020.412

Surface modification of polyethylene microplastic particles during the aqueous-phase ozonation process

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