title: Equilibrium and kinetic studies of copper biosorption by dead Ceriporia lacerata biomass isolated from the litter of an invasive plant in China.
abstract: BACKGROUND
  Ceriporia lacerata, a strain of white-rot fungus isolated from the litter of an invasive plant (Solidago canadensis) in China, was little known about its properties and utilization. In this work, the copper(II) biosorption characteristics of formaldehyde inactivated C. lacerata biomass were examined as a function of initial pH, initial copper(II) concentration and contact time, and the adsorptive equilibrium and kinetics were simulated, too.
  
  
  RESULTS
  The optimum pH was found to be 6.0 at experimental conditions of initial copper(II) concentration 100 mg/L, biomass dose 2 g/L, contact time 12 h, shaking rate 150 r/min and temperature 25°C. Biosorption equilibrium cost about 1 hour at experimental conditions of pH 6.0, initial copper(II) concentration 100 mg/L, C. lacerata dose 2 g/L, shaking rate 150 r/min and temperature 25°C. At optimum pH 6.0, highest copper(II) biosorption amounts were 6.79 and 7.76 mg/g for initial copper(II) concentration of 100 and 200 mg/L, respectively (with other experimental parameters of C. lacerata dose 2 g/L, shaking rate 150 r/min and temperature 25°C). The pseudo second-order adsorptive model gave the best adjustment for copper(II) biosorption kinetics. The equilibrium data fitted very well to both Langmuir and Freundlich adsorptive isotherm models.
  
  
  CONCLUSIONS
  Without further acid or alkali treatment for improving adsorption properties, formaldehyde inactivated C. lacerata biomass possesses good biosorption characteristics on copper(II) removal from aqueous solutions.
authors.affiliation: School of Life Science, Nanjing University, Nanjing, 210093 China ; Institute of South China Karst, Guizhou Normal University, Guiyang, 550001 China ; The State Key Laboratory Incubation Base for Karst Mountain Ecology Environment of Guizhou Province, Guizhou Normal University, Guiyang, 550001 China.
authors.forename: Xiaona
authors.initials: X
authors.lastname: Li
authors.affiliation: School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001 China.
authors.forename: Airong
authors.initials: A
authors.lastname: Li
authors.affiliation: Research Center for Karst Wetland Ecology, Guizhou Minzu University, Guiyang, 550025 China.
authors.forename: Mingzhong
authors.initials: M
authors.lastname: Long
authors.affiliation: School of Life Science, Nanjing University, Nanjing, 210093 China ; Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037 China.
authors.forename: Xingjun
authors.initials: X
authors.lastname: Tian
keywords: Adsorption isotherm; Biosorption; Ceriporia lacerata; Copper; Kinetics