Fig. 4. Binding of radioactivity following the treatment of ¹⁴C-2,4-DCP-polluted Soils 1 and 2 with different amounts of free or immobilized laccase of Trametes villosa under 55% of maximum water-holding capacity (WHC) moisture condition. The standard error for radioactivity (%) ranged between 0.1 and 4.0. A * indicates original enzyme activity applied for immobilization.