Copper binding by dissolved organic matter. II. Variation in type and source of organic matter

Journal Article · Fri Jan 01 00:00:00 EST 1988 · Geochim. Cosmochim. Acta; (United States)

DOI:https://doi.org/10.1016/0016-7037(88)90067-1· OSTI ID:6996702

Cabaniss, S E; Shuman, M S

Copper binding properties of several fulvic acid (FA) and whole water samples are compared by means of an empirical model that was calibrated using Suwannee River FA. Within the calibration limits of the model (pH 5.0-8.5, total Cu concentration 0.1-100 ..mu..M, ionic strength 0.1, and dissolved organic carbon, DOC, 1-10 mg C/1), pCu in solutions of a variety of FA samples are predicted with < 0.2 pCu units root mean square error (RMSE). Within the calibration limits, many whole water sample pCu's are predicted with < 0.3 pCu units RMSE if only one-half of the dissolved organic carbon is assumed to bind Cu. Agreement between prediction and experiment at lower ionic strength is not as good. Variations in Cu binding among different sources of dissolved organic matter appear to be much smaller than those due to chemical factors such as pH and ionic strength.

• Research Organization: Univ. of North Carolina, Chapel Hill (USA)
• OSTI ID: 6996702
• Journal Information: Geochim. Cosmochim. Acta; (United States), Vol. 52:1
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
COPPER IONS
CHEMICAL BONDS
FULVIC ACIDS
CHEMICAL COMPOSITION
GEOCHEMISTRY
CARBON IONS
DISSOLVED GASES
MOLECULAR MODELS
ORGANIC MATTER
OXYGEN
PH VALUE
RIVERS
CHARGED PARTICLES
CHEMISTRY
ELEMENTS
FLUIDS
GASES
IONS
MATHEMATICAL MODELS
NONMETALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
SOLUTES
STREAMS
SURFACE WATERS
580400* - Geochemistry- (-1989)