RETENTION OF CD BY SOIL CONSTITUENTS UNDER DIFFERENT ENVIRONMENTAL-CONDITIONS

The capability of soil components (montmorillonite, humic acids, resti ng and dead cells of Arthrobacter sp. LII isolated from soil) to immob ilize Cd and the effects of environmental factor changes (pH, temperat ure, soil solution composition, time) on its retention in vitro and un der soil conditions were studied. Among tested soil elements, montmori llonite immobilized the lowest amount of Cd from the liquid but metal retention was at least affected by changes of environmental factors. D ead bacterial cells immobilized the largest amount of Cd. Copyright (C ) 1996 Elsevier Science Ltd