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Author Reddy, C. N.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword ENVIRONMENTAL SCIENCES ♦ AMMONIUM COMPOUNDS ♦ ECOLOGICAL CONCENTRATION ♦ CARBON ♦ IRON ♦ MANGANESE ♦ PHOSPHORUS ♦ AQUATIC ECOSYSTEMS ♦ ESTUARIES ♦ NUTRIENTS ♦ PH VALUE ♦ REDOX POTENTIAL ♦ SEDIMENTS ♦ WATER POLLUTION ♦ ECOSYSTEMS ♦ ELEMENTS ♦ METALS ♦ NONMETALS ♦ POLLUTION ♦ SURFACE WATERS ♦ TRANSITION ELEMENTS 520200* -- Environment, Aquatic-- Chemicals Monitoring & Transport-- (-1989)
Abstract A study was conducted on sediment suspensions maintained under condition of controlled pH (5.0, 6.5, and 8.0) and redox potentials (-200, 0, 250, and 500 mv) to determine the effect of these parameters on concentrations of dissolved organic C, P, NH/sub 4+/, Fe, and Mn in an estuarine sediment. Concentration of these nutrients was strongly influenced by changes in sediment pH and redox potential. Dissolved organic C increased from 42 micrograms/ml at pH 5.0 and 500 mv, to 93 micrograms/ml at pH 8.0 and -200 mv. Soluble P, NH/sub 4+/, Fe, and Mn concentrations increased with decreasing sediment redox potential and pH. Phosphorus concentrations ranged from 0.002 micrograms/ml at pH 8.0 and 500 mv, to 0.215 micrograms/ml at pH 5.0 and -200 mv. Iron and manganese concentrations ranged from <0.1 micrograms/ml at pH 8.0 and 500 mv, to 101 and 13 micrograms/ml, repsectively, at pH 5.0 and -200 mv.
Educational Use Research
Learning Resource Type Article
Publisher Date 1981-01-01
Publisher Place United States
Journal J. Environ. Qual.
Volume Number 10
Issue Number 3


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