Yn. Vodyanitskii et al., Application of the Langmuir and Dubinin-Radushkevich equations to the description of Cu and Zn adsorption in rendzinas, EURAS SOIL, 33(11), 2000, pp. 1226-1233
It is proved that, in a number, of cases the modified Dubinin-Radushkevich
equation provides wider means for the description of ion-exchange adsorptio
n of heavy metals by soils as compared to the Langmuir equation. The maximu
m adsorption of title by soddy-calcareous soil rendzina is relatively low,
being equal, on average, to 0.1 mM per 100 g. Zinc is poorly retained by th
e soil. Copper is adsorbed in greater amounts and is retained better.