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Title: Photochemical formation of H/sub 2/O/sub 2/ in natural waters exposed to sunlight

Abstract

Hydrogen peroxide is formed in most natural waters when they are exposed to sunlight. The rate at which H/sub 2/O/sub 2/ accumulates is related to the concentration of light-absorbing (>295 nm) organic substances in these waters. The photochemical accumulation rate of H/sub 2/O/sub 2/ in sunlight has been measured for several surface waters and ground waters and was found to be 2.7 /times/ 10/sup /minus/7/ to 48 /times/ 10/sup /minus/7/ mol L/sup /minus/1/ h/sup /minus/1/, in waters ranging from 0.53 to 18 mgL/sup -1/ dissolved organic carbon (DOC), respectively. These rates were determined in midday sunlight, 0.4 W m/sup /minus/2/ (295-385 nm), latitude 24.3/degrees/ N. Apparent quantum yields of H/sub 2/O/sub 2/ have been determined for natural waters at different wavelengths. These quantum yields decreased with increasing wavelength, from 10/sup /minus/3/ in the near-ultraviolet to 10/sup /minus/6/ in the visible spectral range. The quantum yields have been used in a photochemical model to calculate H/sub 2/O/sub 2/ accumulation rates of natural water samples. Model calculations agree with H/sub 2/O/sub 2/ accumulation rates obtained from exposing three different water samples to sunlight.

Authors:
; ; ;
Publication Date:
Research Org.:
Florida International Univ., Miami (USA)
OSTI Identifier:
6211279
Resource Type:
Journal Article
Journal Name:
Environ. Sci. Technol.; (United States)
Additional Journal Information:
Journal Volume: 22:10
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; HYDROGEN PEROXIDE; PHOTOCHEMICAL REACTIONS; GROUND WATER; MATHEMATICAL MODELS; ORGANIC MATTER; SOLAR RADIATION; SURFACE WATERS; WATER CHEMISTRY; CHEMICAL REACTIONS; CHEMISTRY; HYDROGEN COMPOUNDS; OXYGEN COMPOUNDS; PEROXIDES; RADIATIONS; STELLAR RADIATION; WATER; 520200* - Environment, Aquatic- Chemicals Monitoring & Transport- (-1989)

Citation Formats

Cooper, W J, Zika, R G, Petasne, R G, and Plane, J M.C. Photochemical formation of H/sub 2/O/sub 2/ in natural waters exposed to sunlight. United States: N. p., 1988. Web. doi:10.1021/es00175a004.
Cooper, W J, Zika, R G, Petasne, R G, & Plane, J M.C. Photochemical formation of H/sub 2/O/sub 2/ in natural waters exposed to sunlight. United States. https://doi.org/10.1021/es00175a004
Cooper, W J, Zika, R G, Petasne, R G, and Plane, J M.C. 1988. "Photochemical formation of H/sub 2/O/sub 2/ in natural waters exposed to sunlight". United States. https://doi.org/10.1021/es00175a004.
@article{osti_6211279,
title = {Photochemical formation of H/sub 2/O/sub 2/ in natural waters exposed to sunlight},
author = {Cooper, W J and Zika, R G and Petasne, R G and Plane, J M.C.},
abstractNote = {Hydrogen peroxide is formed in most natural waters when they are exposed to sunlight. The rate at which H/sub 2/O/sub 2/ accumulates is related to the concentration of light-absorbing (>295 nm) organic substances in these waters. The photochemical accumulation rate of H/sub 2/O/sub 2/ in sunlight has been measured for several surface waters and ground waters and was found to be 2.7 /times/ 10/sup /minus/7/ to 48 /times/ 10/sup /minus/7/ mol L/sup /minus/1/ h/sup /minus/1/, in waters ranging from 0.53 to 18 mgL/sup -1/ dissolved organic carbon (DOC), respectively. These rates were determined in midday sunlight, 0.4 W m/sup /minus/2/ (295-385 nm), latitude 24.3/degrees/ N. Apparent quantum yields of H/sub 2/O/sub 2/ have been determined for natural waters at different wavelengths. These quantum yields decreased with increasing wavelength, from 10/sup /minus/3/ in the near-ultraviolet to 10/sup /minus/6/ in the visible spectral range. The quantum yields have been used in a photochemical model to calculate H/sub 2/O/sub 2/ accumulation rates of natural water samples. Model calculations agree with H/sub 2/O/sub 2/ accumulation rates obtained from exposing three different water samples to sunlight.},
doi = {10.1021/es00175a004},
url = {https://www.osti.gov/biblio/6211279}, journal = {Environ. Sci. Technol.; (United States)},
number = ,
volume = 22:10,
place = {United States},
year = {Sat Oct 01 00:00:00 EDT 1988},
month = {Sat Oct 01 00:00:00 EDT 1988}
}