Nitrate Controls on Iron and Arsenic in an Urban Lake
- 28 June 2002
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 296 (5577) , 2373-2376
- https://doi.org/10.1126/science.1072402
Abstract
Aquatic ecosystems are often contaminated by multiple substances. Nitrate, a common aquatic pollutant, strongly influenced the cycling of arsenic (As) under anoxic conditions in urban Upper Mystic Lake (Massachusetts, USA) by oxidizing ferrous iron [Fe(II)] to produce As-sorbing particulate hydrous ferric oxides and causing the more oxidized As(V), which is more particle-reactive than As(III) under these conditions, to dominate. This process is likely to be important in many natural waters.Keywords
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