Comparison of the dehalogenation of dihalomethanes (CH2XI, where X = Cl, Br, I) following ultraviolet photolysis in aqueous and NaCl saltwater environments

Yong Du, Xiangguo Guan, Wai Ming Kwok, Lai Man Chu, David Lee Phillips

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12 Citations (Scopus)


The ultraviolet photolysis of low concentrations of CH2XI (X = Cl, Br, I) were investigated in water and saltwater solutions by photochemistry and picosecond time-resolved resonance Raman spectroscopy. Photolysis in both kinds of solutions formed mostly CH2(OH)2and HI and HX products. However, photolysis of the CH2XI molecules in saltwater resulted in production of some CH2XCl products not observed in aqueous solutions without salt present. The appearance of these new products in saltwater solutions is accompanied by a decrease in the amount of CH2(OH)2, HI, and HX products compared to photolysis in aqueous solutions without salt present. The possible implications for photolysis of CH2XI and other polyhalomethanes in seawater and other salt aqueous environments compared to nonsaltwater solvated environments is briefly discussed.
Original languageEnglish
Pages (from-to)5872-5882
Number of pages11
JournalJournal of Physical Chemistry A
Issue number26
Publication statusPublished - 7 Jul 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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