|
|
Table 1. Uptake of Pb ion by unmodified and modified Aspergillus niger biomass at pH 7. Mean of triplicate analysis; Pb concentration 100 mg l -1 ; biomass loading at 0.3 g; EDTA: ethylenediamine tetra acetic acid. |
% metal uptake (unmodified biomass) |
Modifying agents |
% metal uptake (modified biomass) |
% increase in metal uptake |
28.18 |
Oxalic acid |
92.84 |
69.65 |
|
Malic acid |
48.11 |
41.23 |
|
EDTA |
39.83 |
29.25 |
|
|