| Popis: |
The growth, nutrient (N, P) assimilation and removal of cadmium by immobilized Scenedesmus acutus were investigated. Results obtained with two kinds of immobilization matrices (k-carrageenan and sodium alginate) were compared with control and with suspended cultures of the microalgae. Orthophosphate assimilation of suspended cultures was stimulated by cadmium but nitrate consumption was inhibited. In alginate immobilized cultures cadmium stimulated nitrate consumption but inhibited orthophosphate assimilation. The immobilization material influenced both nutrient assimilation and cadmium removal by Scenedesmus cells. In the first 1.5 h of experimentation, k-carrageenan immobilized cells removed more cadmium than the alginate immobilized cells. However, at a later stage (i.e. after 1.5 h) cadmium removal was higher in alginate immobilized cells. |
