Photochemical formation of H2O2 in natural waters exposed to sunlight

Filtered (0.45 um) samples of groundwater and surface waters from various locations in the U.S.A. were irradiated with UV or sunlight. Samples were analysed by a fluorimetric method relating peroxide concentration to an enzyme-mediated depletion of scopoletin fluorescence. Light flux was determined...

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Bibliographic Details
Published in:Environmental science & technology 1988-10, Vol.22 (10), p.1156-1160
Main Authors: COOPER, W. J, ZIKA, R. G, PETASNE, R. G, PLANE, J. M. C
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Photochemistry
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
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Summary:Filtered (0.45 um) samples of groundwater and surface waters from various locations in the U.S.A. were irradiated with UV or sunlight. Samples were analysed by a fluorimetric method relating peroxide concentration to an enzyme-mediated depletion of scopoletin fluorescence. Light flux was determined by ferric oxalate actinometry. Chloride ion concentrations, DOC and hydrogen peroxide accumulation rates are tabulated for 8 groundwaters, 7 filtered surface waters and 2 unfiltered surface waters. Quantum yields of peroxide accumulation for 6 waters at wavelengths between 287.5 and 700 nm are tabulated. Peroxide accumulation rate was related to the concentration of light absorbing organic substances. There are 32 references.
ISSN:0013-936X
1520-5851
DOI:10.1021/es00175a004