Effect of pH and redox potential on concentration of dissolved nutrients in an estuarine sediment

Journal Article · Thu Jan 01 04:00:00 EST 1981 · J. Environ. Qual.; (United States)

OSTI ID:5554794

Deluane, R D; Reddy, C N; Patrick, Jr, W H

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.

• OSTI ID: 5554794
• Journal Information: J. Environ. Qual.; (United States), Journal Name: J. Environ. Qual.; (United States) Vol. 10:3; ISSN JEVQA
• Country of Publication: United States
• Language: English

Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring &amp; Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AMMONIUM COMPOUNDS
AQUATIC ECOSYSTEMS
CARBON
ECOLOGICAL CONCENTRATION
ECOSYSTEMS
ELEMENTS
ESTUARIES
IRON
MANGANESE
METALS
NONMETALS
NUTRIENTS
PH VALUE
PHOSPHORUS
POLLUTION
REDOX POTENTIAL
SEDIMENTS
SURFACE WATERS
TRANSITION ELEMENTS
WATER POLLUTION