Biosorption of aquatic copper (II) by mushroom biomass Pleurotus eryngii: kinetic and isotherm studies

Biosorption is an effective method for removing heavy metals from effluent. This work mainly aimed to evaluate the adsorption performance of the widely cultivated novel mushroom, Pleurotus eryngii, for the removal of Cu(II) from single aqueous solutions. Kinetics and equilibria were obtained using a...

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Bibliographic Details
Published in:Water science and technology 2015, Vol.71 (2), p.283-288
Main Authors: Kan, Shi-Hong, Sun, Bai-Ye, Xu, Fang, Song, Qi-Xue, Zhang, Sui-Fang
Format: Article
Language:English
Subjects:
Adsorption
Aqueous solutions
Biodegradation, Environmental
Biomass
Biosorption
Capacity
Contamination
Copper
Copper - chemistry
Copper - metabolism
Data mining
Desalination
Equilibrium
Experiments
Free energy
Fungi
Hazardous materials
Heat of adsorption
Heavy metals
Kinetics
Metals
Pleurotus - chemistry
Pleurotus - growth & development
Pleurotus - metabolism
Pleurotus eryngii
Quality
Removal
Soil sciences
Solutions
Sorption
Studies
Waste Water - chemistry
Wastewater
Wastewater pollution
Wastewater treatment
Water Pollutants, Chemical - chemistry
Water Pollutants, Chemical - metabolism
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Summary:Biosorption is an effective method for removing heavy metals from effluent. This work mainly aimed to evaluate the adsorption performance of the widely cultivated novel mushroom, Pleurotus eryngii, for the removal of Cu(II) from single aqueous solutions. Kinetics and equilibria were obtained using a batch technique. The sorption kinetics follows the pseudo-second-order model, whereas the adsorption equilibria are best described by the Langmuir model. The adsorption process is exothermic because both the Langmuir-estimated biosorption capacity and the heat of adsorption estimated from the Temkin model decreased with increasing tested temperature. Based on the adsorption intensity estimated by the Freundlich model and the mean adsorption free energy estimated by the Dubinin-Radushkevich model, the type of adsorption is defined as physical adsorption. The biomass of the macro-fungus P. eryngii has the potential to remove Cu(II) from a large-scale wastewater contaminated by heavy metals, because of its favorable adsorption, short biosorption equilibrium time of 20 min and remarkable biosorption capacity (15.19 mg g⁻¹ as calculated by the Langmuir model). The adsorbed metal-enriched mushroom is a high-quality bio-ore by the virtue of its high metal content of industrial mining grade and easy metal extractability.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2014.511