Abstract: A macrofungi strain LGBS with high copper resistance was screened by plate method.The species was identified by ITS sequencing analysis. Some factors were studied to analyze the biosorption effects, such as dosages of mycelial pellet, pH, temperature, revolutions per minute( r/min), adsroption time and initial Cu2+ concentrations. The results showed that the ITS sequence of the strain LGBS had a high similarity to Irpex lacteus. It was able to grow on the PDA plates with the initial Cu2+ concentrations under 600 mg/L. The adsorption quantity had a decreasing tendency when the dosages of mycelial pellet was increased. The dosages of mycelial pellet was increased from 0.5 to 2.5 g/L, adsorption quantity decreased from 8.33 to 3.40 mg/g, adsorption rate rised from 20.8% to 42.5%. When pH was 4, the strain had the highest adsorption quantity, and at 15℃, it had the best performance of adsorption; the adsorption quantity decreased slightly as temperatures rose; but if the temperature continued to rise, it had little influence on the adsorption quantity. Under 50 r/min, it had a good adsorption property. The adsorption quantity of Cu2+ increased from 3.87 to 17.21 mg /L with the increasing initial Cu2+ concentrations from 20 to 80 mg /L. The best adsroption time was 60 min, and extending the adsroption time could not enhance the adsorption quantity. The study indicated that Irpex lacteus LGBS has high adsorbability on Cu2+, having bright prospects in future research and application.

Key words: macrofungi, heavy metal pollution, Cu2+, biosorption, Irpex lacteus