Biosorption of copper(II) and cadmium(II) from aqueous solutions by free and immobilized biomass of Aspergillus niger

This study investigates the ability of Aspergillus niger resting cells entrapped into poly(vinyl alcohol) (PVA) network to remove Cu(II) and Cd(II) from single ions solutions. The performance of free and immobilized biosorbent was evaluated by equilibrium and kinetic studies. The PVA-immobilized fun...

Full description

Saved in:
Bibliographic Details
Published in:Bioresource technology 2010-03, Vol.101 (6), p.1727-1731
Main Authors: Tsekova, K., Todorova, D., Dencheva, V., Ganeva, S.
Format: Article
Language:English
Subjects:
Adsorption
Aspergillus niger
Aspergillus niger - metabolism
Biodegradation, Environmental
Biological and medical sciences
Biomass
Biotechnology
Biotechnology - methods
Cadmium
Cadmium - chemistry
Copper
Copper - chemistry
Diffusion
Fundamental and applied biological sciences. Psychology
Fungi - metabolism
Immobilized cells biosorption
Ions
Kinetics
Metals - chemistry
Solutions
Spores, Fungal - chemistry
Time Factors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study investigates the ability of Aspergillus niger resting cells entrapped into poly(vinyl alcohol) (PVA) network to remove Cu(II) and Cd(II) from single ions solutions. The performance of free and immobilized biosorbent was evaluated by equilibrium and kinetic studies. The PVA-immobilized fungal biosorbent removed Cu(II) and Cd(II) rapidly and efficiently with maximum metal removal capacities of 34.13 mg/g and 60.24 mg/g, respectively. These values of heavy metal uptake at equilibrium were higher than the amount of Cu(II) and Cd(II) removal by free biomass (17.60 mg/g and 69.44 mg/g, respectively). Biosorption equilibrium data were best described by Langmuir isotherm model. The biosorption kinetics followed the pseudo-second order model and intraparticle diffusion equation. The results obtained suggest that the immobilized biosorbent holds great potential for wastewater treatment applications.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2009.10.012