Effects of soluble organic matter and sewage sludge amendments on cadmium sorption by soils at low cadmium concentrations

Journal Article · Mon Sep 01 04:00:00 EDT 1986 · Soil Sci.; (United States)

DOI:https://doi.org/10.1097/00010694-198609000-00006· OSTI ID:6794548

Neal, R H; Sposito, G

The authors investigated cadmium sorption by soils of different chemical and mineralogical composition at soil solution concentrations between 0.001 and 12 ..mu..mol Cd kg/sup -1/. The application of municipal sewage sludge to the soils generally resulted in a decrease in the amount of Cd sorbed. S-curve isotherms were observed for Cd sorption by all soils, suggesting preferential association of Cd with aqueous solution components at low Cd solution concentrations. The removal of soluble organic material by a careful washing procedure resulted in Cd sorption following an L-curve isotherm, indicating that Cd in soils is complexed by aqueous organic ligands whose effect on adsorption is significant at low Cd concentrations (0.08 ..mu..mol kg/sub a//sup -1/).

• Research Organization: Univ. of California, Riverside
• OSTI ID: 6794548
• Journal Information: Soil Sci.; (United States), Journal Name: Soil Sci.; (United States) Vol. 142:3; ISSN SOSCA
• Country of Publication: United States
• Language: English

Related Subjects

510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORPTION ISOTHERMS
CADMIUM
CONTAMINATION
ECOLOGICAL CONCENTRATION
ELEMENTS
ENVIRONMENTAL EFFECTS
GROUND DISPOSAL
ISOTHERMS
MANAGEMENT
METALS
MUNICIPAL WASTES
ORGANIC MATTER
SEWAGE
SEWAGE SLUDGE
SLUDGES
SOILS
SOLVENT PROPERTIES
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES