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The Interaction of Selenate and Selenite with Selected Freshwater Sediments
Author(s) -
Lipinski Norman George,
Huang Pan Ming,
Hammer U. Theodore,
Liaw Wen K.
Publication year - 1987
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.19870720113
Subject(s) - selenate , selenium , sediment , abiotic component , environmental chemistry , organic matter , chemistry , environmental science , ecology , geology , biology , geomorphology , organic chemistry
Selenite and selenate at submicrogram levels were added to suspensions of two lake sediments (Buffalo Pound and Katepwa Lakes) from southeastern Saskatchewan, Canada. The sediment from Buffalo Pound Lake rapidly oxidized selenite in an Arrhenius type reaction and followed first order kinetics. The sediment from Katepwa Lake oxidized selenite, but at a much slower rate. The oxidation of selenite is an abiotic process. The sediment from Katepwa Lake also reduced selenate, while Buffalo Pound Lake sediment did not. The reduction of selenate is likely mediated by biotic activity, associated biochemical processes, and/or organic matter.