A study of the distribution of lead, cadmium and copper between water and kaolin, bentonite and a river sediment.
Experiments were carried out to monitor the equilibrium distribution of lead, cadmium and copper between an aqueous phase modelling natural water and a solid phase modelling natural sediment, under varying conditions. The aqueous phase was analysed using ETAAS and differential pulse anodic stripping voltammetry (DPASV), whereas XRD and FTIR were used to study the solid phase. Sorption isotherms at constant pH were measured. Conditional distribution constants were calculated as functions of the pH, the time of equilibration and the amount of solid material. The results obtained stress the need for standardization of the approaches to the study of water-sediment interactions in order to be able to evaluate and compare the extensive data from field measurements and to predict these interactions.
Department of Analytical Chemistry, Charles University, Albertov, Prague 2, Czech Republic.
V
V
Pacáková
D
D
Pockeviciute
S
S
Armalis
K
K
Stulík
J
J
Li
J
J
Veselý
D001546:Bentonite / Q000378:metabolism; D002104:Cadmium / Q000032:analysis / Q000493:pharmacokinetics*; D003300:Copper / Q000032:analysis / Q000493:pharmacokinetics*; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007616:Kaolin / Q000378:metabolism; D007854:Lead / Q000032:analysis / Q000493:pharmacokinetics*; D008962:Models, Theoretical; D012016:Reference Values; D014873:Water Pollutants / Q000032:analysis / Q000493:pharmacokinetics
D014873:Water Pollutants; D002104:Cadmium; D001546:Bentonite; D007616:Kaolin; D007854:Lead; D003300:Copper