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. 2015 Apr 25:13:37.
doi: 10.1186/s40201-015-0191-1. eCollection 2015.

Equilibrium and kinetic studies of copper biosorption by dead Ceriporia lacerata biomass isolated from the litter of an invasive plant in China

Xiaona Li  1 , Airong Li  2 , Mingzhong Long  3 , Xingjun Tian  4
Affiliations

Equilibrium and kinetic studies of copper biosorption by dead Ceriporia lacerata biomass isolated from the litter of an invasive plant in China

Xiaona Li et al. J Environ Health Sci Eng. .

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.

Keywords: Adsorption isotherm; Biosorption; Ceriporia lacerata; Copper; Kinetics.

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Figures

Figure 1
Figure 1
The effect of solution pH on copper biosorption by Ceriporia lacerata. Experimental conditions: initial copper(II) concentration = 100 mg/L, volume of copper(II) solution = 100 mL, Ceriporia lacerata dose = 2 g/L, contact time = 12 h, shaking rate = 150 r/min, temperature = 25°C.
Figure 2
Figure 2
The amount of copper biosorption by Ceriporia lacerata at different contact time. Experimental conditions: pH 6.0, initial copper(II) concentration = 100 mg/L, volume of copper(II) solution = 100 mL, Ceriporia lacerata dose = 2 g/L, shaking rate = 150 r/min, temperature = 25°C.
Figure 3
Figure 3
The effect of initial copper(II) concentration on copper biosorption by Ceriporia lacerata at optimum pH 6.0. Experimental conditions: pH 6.0, volume of copper(II) solution = 100 mL, Ceriporia lacerata dose = 2 g/L, contact time = 12 h, shaking rate = 150 r/min, temperature = 25°C.
Figure 4
Figure 4
Linear plot of the pseudo second-order equation for copper biosorption by Ceriporia lacerata. Experimental conditions: pH 6.0, initial copper(II) concentration = 100 mg/L, volume of copper(II) solution = 100 mL, Ceriporia lacerata dose = 2 g/L, contact time = 12 h, shaking rate = 150 r/min, temperature = 25°C.
Figure 5
Figure 5
Copper biosorption isotherms by Ceriporia lacerata at pH 6 and 25°C. Experimental conditions: pH 6.0, initial copper(II) concentration = 5–200 mg/L, volume of copper(II) solution = 100 mL, Ceriporia lacerata dose = 2 g/L, contact time = 12 h, shaking rate = 150 r/min, temperature = 25°C.
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