The trend of cadmium biosorption was quite different, so that the increasing cadmium concentrations resulted in decreasing biomass production by all of the test isolates and positively correlated with increased residual cadmium in the culture broth (Fig. 6).
It has been suggested that metal uptake by T. harzianum is highly pH- and temperature-dependent and the maximum metal uptake takes place at pH 4.36,37 At pH values above 7, metal uptake is reduced as metals exist as hydroxide colloids