Browse > Article
http://dx.doi.org/10.7857/JSGE.2021.26.4.001

Removal of PCBs in Aqueous Phase in Ultraviolet (UV), Ultrasonic (US), and UV/US Processes  

Lee, Dukyoung (Department of Environmental Engineering, Kumoh National Institute of Technology)
Son, Younggyu (Department of Environmental Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of Soil and Groundwater Environment / v.26, no.4, 2021 , pp. 1-7 More about this Journal
Abstract
The removal of PCBs (Polychlorinated biphenyls) in aqueous phase was investigated in the ultraviolet (UV) process, ultrasonics (US) process and ultraviolet/ultrasonic (UV/US) process using PCB No.7 and Aroclor 1260. For PCB No.7 relatively high removal efficiency over 90% was obtained during 20 min in the UV process and UV/US process. On the other hand, lower removal efficiency of 50 - 70% was achieved for it consisted of individual congeners of PCBs containing 3~8 of chlorine atom. It was found that the dechlorination reaction (the photolytic cleavage of C-Cl bond) was considered as a main removal mechanism in the UV process while PCBs were removed by cavitation-induced radical reaction in the US process. No significant dechlorination occurred in the US process. Consequently, it was suggested that the UV process or UV/US process was applicable for the removal of PCBs in aqueous phase in terms of the removal efficiency and operation time. In addition, the application of saturating gas such as Ar and Air could be considered to control redox condition and enhance the severity of acoustic cavitation for the removal of PCBs.
Keywords
PCBs (Polychlorinated biphenyls); Ultraviolet; Ultrasound; Dechlorination; Cavitation;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Li, B., Li, L., Lin, K., Zhang, W., Lu, S., and Luo, Q., 2013, Removal of 1,1,1-trichloroethane from aqueous solution by a sono-activated persulfate process, Ultrason. Sonochem., 20(3), 855-863.   DOI
2 Miao, X.S., Chu, S.G., and Xu, X.B., 1999, Degradation pathways of PCBs upon UV irradiation in hexane, Chemosphere, 39(10), 1639-1650.   DOI
3 Ministry of Environment (MOE), 2021, White Book of Environmental Monitoring Report on Persistent Organic Pollutants (POPs)
4 Nasseri, S., Mahvi, A.H., Seyedsalehi, M., Yaghmaeian, K., Nabizadeh, R., Alimohammadi, M., and Safari, G.H., 2017, Degradation kinetics of tetracycline in aqueous solutions using peroxydisulfate activated by ultrasound irradiation: Effect of radical scavenger and water matrix, J. Mol. Liq., 241, 704-714.   DOI
5 Gonzalez, M.C., Le Roux, G.C., Rosso, J.A., and Braun, A.M., 2007, Mineralization of CCl4 by the UVC-photolysis of hydrogen peroxide in the presence of methanol, Chemosphere, 69(8), 1238-1244.   DOI
6 Rao, Y., Yang, H., Xue, D., Guo, Y., Qi, F., and Ma, Y., 2016, Sonolytic and sonophotolytic degradation of Carbamazepine: Kinetic and mechanisms, Ultrason. Sonochem., 32, 371-379.   DOI
7 Tang, T., Zheng, Z., Wang, R., Huang, K., Li, H., Tao, X., Dang, Z., Yin, H., and Lu, G., 2018, Photodegradation behaviors of polychlorinated biphenyls in methanol by UV-irradiation: Solvent adducts and sigmatropic arrangement, Chemosphere, 193, 861-868.   DOI
8 Xu, L.J., Chu, W., and Graham, N., 2013, Sonophotolytic degradation of dimethyl phthalate without catalyst: Analysis of the synergistic effect and modeling, Water Res., 47(6), 1996-2004.   DOI
9 Zhang, G. and Hua, I., 2000, Cavitation Chemistry of Polychlorinated Biphenyls: Decomposition Mechanisms and Rates, Environ. Sci. Technol., 34(8), 1529-1534.   DOI
10 Beckett, M.A. and Hua, I., 2001, Impact of ultrasonic frequency on aqueous sonoluminescence and sonochemistry, J. Phys. Chem. A, 105(15), 3796-3802.   DOI
11 Chang, F.C., Chiu, T.C., Yen, J.H., and Wang, Y.S., 2003, Dechlorination pathways of ortho-substituted PCBs by UV irradiation in n-hexane and their correlation to the charge distribution on carbon atom, Chemosphere, 51(8), 775-784.   DOI
12 International Agency for Research on Cancer (IARC), 2016, Polychlorinated Biphenyls and Plybrominated Biphenyls.
13 Choi, J., Lee, H., and Son, Y., 2021, Effects of gas sparging and mechanical mixing on sonochemical oxidation activity, Ultrason. Sonochem., 70, 105334.   DOI
14 Petrier, C., Combet, E., and Mason, T., 2007, Oxygen-induced concurrent ultrasonic degradation of volatile and non-volatile aromatic compounds, Ultrason. Sonochem., 14(2), 117-121.   DOI
15 Matafonova, G. and Batoev, V., 2019, Review on low- and highfrequency sonolytic, sonophotolytic and sonophotochemical processes for inactivating pathogenic microorganisms in aqueous media, Water Res., 166, 115085.   DOI
16 Ghafoori, S., Mowla, A., Jahani, R., Mehrvar, M., and Chan, P.K., 2015, Sonophotolytic degradation of synthetic pharmaceutical wastewater: Statistical experimental design and modeling, J. Environ. Manage., 150, 128-137.   DOI