Bioleaching of a High Iron Content Kaolin by Aspergillus niger: The Effects of Organic Acids Biosynthesis

Abstract:

Article Preview

In this work, bioleaching of iron from a kaolin sample was carried out using two different strains of Aspergillus niger, and the effects of strain type, pulp density, and addition time of clay on the iron removal were investigated using a full factorial design. It is concluded that strain type has the most significant effect on the iron removal. Also, the highest removal extent was 42.8% that was achieved by using the strain isolated from pistachio shell at the pulp density of 20 g/l, when the clay was added at the beginning of the experiments. The results showed that for the experiments in which the clay was added in the first day of cultivation, the average organic acids concentration (citric acid: 5.6 g/l, and oxalic acid: 4.54 g/l) were higher in comparison to those experiments in which the clay was added in the third day (citric acid: 5.25 g/l, and oxalic acid: 2.87).

Info:

Periodical:

Advanced Materials Research (Volumes 20-21)

Edited by:

Axel Schippers, Wolfgang Sand, Franz Glombitza and Sabine Willscher

Pages:

111-114

DOI:

10.4028/www.scientific.net/AMR.20-21.111

Citation:

M. Pazouki et al., "Bioleaching of a High Iron Content Kaolin by Aspergillus niger: The Effects of Organic Acids Biosynthesis", Advanced Materials Research, Vols. 20-21, pp. 111-114, 2007

Online since:

July 2007

Export:

Price:

$35.00

[1] D. Ousmanova and W. Parker: Fungal Generation of Organic Acids for Removal of Lead from Contaminated Soil, Water Air Soil Pollute, Volume 179, pp.365-380 (2007).

DOI: 10.1007/s11270-006-9241-8

[2] C. Cameselle, J.T. Bohlmann, M.J. Nunez and J.M. Lema: Oxalic acid production by A. niger Part I: Influence of sucrose and milk whey as carbon source, Bioprocess Engineering, Volume 19, pp.247-252 (1998).

DOI: 10.1007/pl00009022

[3] C.P. Kubicek, G.S. Kunar, W. Wohrer and M. Ro»hr: Evidence for a cytoplasmatic pathway of oxalate biosynthesis in A. niger, Appl. Environ. Microbiol., Volume 54 pp.633-637 (1988).

[4] C. Cameselle, M.T. Ricart, M.J. Nunez and J.M. Lema: Iron removal from kaolin comparison between in situ" and "two stage, bioleaching process, Hydrometallurgy, 65, 97-105 (2003).

DOI: 10.1016/s0304-386x(02)00196-2

[5] G.H. Jeffery, J. Basset, J. Mendham and R.C. Denny: Vogel's textbook of quantitative chemical analysis, Longman Scientific and Technical, Longman Group UK ltd., England, pp.690-692 (1989).

[6] JR. Marrier and M. Boulet: Direct determination of citric acid in milk with an improved, pyridine acetic anhydride method, J. Dairy Sci. (1958).

DOI: 10.3168/jds.s0022-0302(58)91152-4

[7] N. Nelson: A photometric adaptation of the Somogyi method for the determination of glucose, J. Biol. Chem., Volume 153, pp.375-380 (1944).

[8] D.C. Montgomery: Design and analysis of experiments, Wiley, New York, pp.203-264 (2005).

[9] C.N. Mulligan, M. Kamali and B.F. Gibbs: Bioleaching of heavy metals from a low-grade mining ore using A. niger, Journal of Hazardous Materials, Volume 110, pp.77-84 (2004).

DOI: 10.1016/j.jhazmat.2004.02.040

In order to see related information, you need to Login.