Record Display for the EPA National Library Catalog

RECORD NUMBER: 748 OF 777

OLS Field Name OLS Field Data
Main Title UV-Sensitive Complex Phosphorus: Association with Dissolved Humic Materials and Iron in a Bog Lake.
Author Francko, D. ; Heath, R. ;
CORP Author Michigan State Univ., Hickory Corners. W.K. Kellogg Biological Station. ;Kent State Univ., OH. Dept. of Biological Sciences.;Corvallis Environmental Research Lab., OR.
Year Published 1982
Report Number CONTRIB-450; EPA-R-801936; EPA/600/J-82/440;
Stock Number PB85-138220
Additional Subjects Water pollution ; Ultraviolet radiation ; Lakes ; Phosphorous inorganic compounds ; Humic acid ; Iron ; Molecular weight ; Samples ; Chemical reactions ; Biochemistry ; Water analysis ; Limnology ; Chemical analysis ; Concentration(Composition) ; Reprints ; Water pollution detection ; Iron ions
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB85-138220 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 9p
Abstract
The concentration of UV-sensitive complex phosphorus compounds in water from an acid bog lake was linearly related to the concentration of dissolved high molecular weight humic material (DHM) both seasonally and diurnally. The first-order rate of photoreduction (Fe(+3) to Fe(+2) of DHM. . iron equaled the rate of release of orthophosphate (SRP) from these compounds. The rate of photoreduction of DHM. . iron was the same as the rate of photoreduction of ferric citrate under similar conditions. Reduced DHM. . iron was auto-oxidizable (Fe(+2) to Fe(+5); ferrous citrate was not. These data support the view that orthophosphate sorbed to ferric iron. . DHM complexes may be released by a mechanism involving UV-induced photoreduction of ferric iron to the ferrous state.