Photolysis of polychlorinated biphenyls on octadecylsilylated silica particles

Tatsuo Oida, John R. Barr, Kazuhiro Kimata, P. Cheryl McClure, Chester R. Lapeza, Ken Hosoya, Tohru Ikegami, Christopher J. Smith, Donald George Jr Patterson, Nobuo Tanaka

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

PCBs were decomposed in a quartz column packed with octadecylsilylated silica particles (ODS-silica) by external UV irradiation. The photolysis of PCBs having two to eight chlorines, including those which are the major constituents of Aroclors (PCB-180, PCB-153, PCB-118, and PCB-105) as well as coplanar PCBs, allowed the examination of the factors that affect the reactivity and product distribution. Steric congestion and molecular symmetry were found to be the major factors affecting the reactivity and the site of the reaction. Some general rules can explain the seemingly complicated decomposition pathways of various congeners. The results indicate that the dechlorination at the ortho-position which is predominant leads to products having not only higher toxic equivalency factors but also much longer life under photolysis conditions. Highly chlorinated PCBs showed tendency to lose chlorines from meta- or para-positions. The reaction pathways were not much affected by the light source, a mercury lamp with or without a pyrex filter or sunlight, in spite of the reduction in decomposition rate with a weaker light source. Continuous photolysis of highly chlorinated PCBs trapped on ODS-silica from aqueous solution was also possible.

Original languageEnglish (US)
Pages (from-to)1795-1807
Number of pages13
JournalChemosphere
Volume39
Issue number11
DOIs
StatePublished - Nov 1 1999

Fingerprint

Photolysis
Polychlorinated Biphenyls
photolysis
Polychlorinated biphenyls
Silicon Dioxide
PCB
silica
Silica
2,4,5,2',4',5'-hexachlorobiphenyl
Chlorine
Light sources
Aroclors
Decomposition
Mercury vapor lamps
Light
Dechlorination
Quartz
Sunlight
Poisons
chlorine

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Oida, T., Barr, J. R., Kimata, K., McClure, P. C., Lapeza, C. R., Hosoya, K., ... Tanaka, N. (1999). Photolysis of polychlorinated biphenyls on octadecylsilylated silica particles. Chemosphere, 39(11), 1795-1807. https://doi.org/10.1016/S0045-6535(99)00073-9
Oida, Tatsuo ; Barr, John R. ; Kimata, Kazuhiro ; McClure, P. Cheryl ; Lapeza, Chester R. ; Hosoya, Ken ; Ikegami, Tohru ; Smith, Christopher J. ; Patterson, Donald George Jr ; Tanaka, Nobuo. / Photolysis of polychlorinated biphenyls on octadecylsilylated silica particles. In: Chemosphere. 1999 ; Vol. 39, No. 11. pp. 1795-1807.
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Oida, T, Barr, JR, Kimata, K, McClure, PC, Lapeza, CR, Hosoya, K, Ikegami, T, Smith, CJ, Patterson, DGJ & Tanaka, N 1999, 'Photolysis of polychlorinated biphenyls on octadecylsilylated silica particles', Chemosphere, vol. 39, no. 11, pp. 1795-1807. https://doi.org/10.1016/S0045-6535(99)00073-9

Photolysis of polychlorinated biphenyls on octadecylsilylated silica particles. / Oida, Tatsuo; Barr, John R.; Kimata, Kazuhiro; McClure, P. Cheryl; Lapeza, Chester R.; Hosoya, Ken; Ikegami, Tohru; Smith, Christopher J.; Patterson, Donald George Jr; Tanaka, Nobuo.

In: Chemosphere, Vol. 39, No. 11, 01.11.1999, p. 1795-1807.

Research output: Contribution to journalArticle

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AU - Barr, John R.

AU - Kimata, Kazuhiro

AU - McClure, P. Cheryl

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AU - Hosoya, Ken

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AU - Smith, Christopher J.

AU - Patterson, Donald George Jr

AU - Tanaka, Nobuo

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Oida T, Barr JR, Kimata K, McClure PC, Lapeza CR, Hosoya K et al. Photolysis of polychlorinated biphenyls on octadecylsilylated silica particles. Chemosphere. 1999 Nov 1;39(11):1795-1807. https://doi.org/10.1016/S0045-6535(99)00073-9