Adsorption and mobility of cadmium in natural, uncultivated soils

• Published in: Journal of environmental quality Vol. 22; no. 4; pp. 737 - 742
• Main Authors: Sanchez-Martin, M.J, Sanchez-Camazano, M
• Format: Journal Article
• Language: English
• Published: Madison, WI American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America 01.10.1993; Crop Science Society of America; American Society of Agronomy
• Subjects: ADSORCION; ADSORPTION; ARCILLA; ARGILE; CADMIO; CADMIUM; CATION; CATIONES; CIENCIA DEL SUELO; Earth sciences; Earth, ocean, space; ECHANGE D'ION; Engineering and environment geology. Geothermics; Exact sciences and technology; Geochemistry; INTERCAMBIO IONICO; MATERIA ORGANICA; MATIERE ORGANIQUE; MOUVEMENT; MOVIMIENTO; Pollution, environment geology; PROPIEDADES FISICO-QUIMICAS SUELO; PROPRIETE PHYSICOCHIMIQUE DU SOL; SCIENCES DU SOL; Soil and rock geochemistry; SOL; SUELO; Europe; Salamanca Province; Spain; adsorption; mobility; cation exchange capacity; heavy metals; cadmium; statistical analysis; pollution; soils; correlation coefficient
• ISSN: 0047-2425; 1537-2537
• DOI: 10.2134/jeq1993.00472425002200040015x

The influence of soil properties on the adsorption and mobility of Cd was studied in 22 natural, uncultivated soils from Salamanca province to understand the environmental characteristics of Cd as a pollutant. Cadmium adsorption was studied by means of adsorption isotherms, using low Cd concentrations that were similar to those potentially found in polluted soils, and Cd mobility was investigated by using soil thin layer chromatography. The Freundlich adsorption constant (K) was not found to be related to any soil properties studied. In contrast, the distribution coefficients (Kd) at 15 and 30 micrograms L-1 equilibrium concentrations were found to be related to the cation exchange capacity (CEC) of the soil (r = 0.43 and r = 0.44, respectively, p 0.05). The adsorption (Q), amount adsorbed at high concentrations (Ci