All Issue

2021 Vol.26, Issue 4
Removal of PCBs in Aqueous Phase in Ultraviolet (UV), Ultrasonic (US), and UV/US Processes

자외선 및 초음파 공정에 의한 수용액 상의 PCBs 분해

Dukyoung Lee12
,
Younggyu Son12*
이덕영 12
,
손영규 12*
1Department of Environmental Engineering, Kumoh National Institute of Technology
2Department of Energy Engineering Convergence, Kumoh National Institute of Technology
1금오공과대학교 환경공학과
2금오공과대학교 에너지공학융합전공
*Corresponding Author
31 August 2021. pp. 1-7
PDF XML Citation
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
References

References

1

Beckett, M.A. and Hua, I., 2001, Impact of ultrasonic frequency on aqueous sonoluminescence and sonochemistry, J. Phys. Chem. A, 105(15), 3796-3802.

10.1021/jp003226x
2

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.

10.1016/s0045-6535(03)00003-1
3

Choi, J., Lee, H., and Son, Y., 2021, Effects of gas sparging and mechanical mixing on sonochemical oxidation activity, Ultrason. Sonochem., 70, 105334.

10.1016/j.ultsonch.2020.105334
4

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.

10.1016/j.jenvman.2014.11.011
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.

10.1016/j.chemosphere.2007.05.076
6

International Agency for Research on Cancer (IARC), 2016, Polychlorinated Biphenyls and Plybrominated Biphenyls.

7

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.

10.1016/j.ultsonch.2012.11.014
8

Matafonova, G. and Batoev, V., 2019, Review on low- and high-frequency sonolytic, sonophotolytic and sonophotochemical processes for inactivating pathogenic microorganisms in aqueous media, Water Res., 166, 115085.

10.1016/j.watres.2019.115085
9

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.

10.1016/s0045-6535(99)00062-4
10

Ministry of Environment (MOE), 2021, White Book of Environmental Monitoring Report on Persistent Organic Pollutants (POPs)

11

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.

10.1016/j.molliq.2017.05.137
12

Pétrier, 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.

10.1016/j.ultsonch.2006.04.007
13

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.

10.1016/j.ultsonch.2016.04.005
14

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.

15

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.

10.1016/j.watres.2013.01.015
16

Zhang, G. and Hua, I., 2000, Cavitation Chemistry of Polychlorinated Biphenyls:  Decomposition Mechanisms and Rates, Environ. Sci. Technol., 34(8), 1529-1534.

10.1021/es981127f
Information
  • Publisher :The Korean Society of Soil and Groundwater Environment
  • Publisher(Ko) :한국지하수토양환경학회
  • Journal Title :Journal of Soil and Groundwater Environment
  • Journal Title(Ko) :지하수토양환경
  • Volume : 26
  • No :4
  • Pages :1-7
  • Received Date : 2021-07-08
  • Revised Date : 2021-07-12
  • Accepted Date : 2021-07-23
  • DOI :https://doi.org/10.7857/JSGE.2021.26.4.001
Journal Informaiton Journal of Soil and Groundwater Environment Journal of Soil and Groundwater Environment
Online Submission
  • KOFST
  • KISTI Current Status
  • KISTI Cited-by
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close