One Step Bioleaching of Sulphide Ore with Low Concentration of Arsenic by <i>Aspergillus niger</i> and Taguchi Orthogonal Array Optimization<sup>*</sup>

Sadia Ilyas; 池汝安; Jae Chun Lee; Haq Nawaz Bhatti

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One Step Bioleaching of Sulphide Ore with Low Concentration of Arsenic by Aspergillus niger and Taguchi Orthogonal Array Optimization^*

Updated：2026-01-06

- One Step Bioleaching of Sulphide Ore with Low Concentration of Arsenic by Aspergillus niger and Taguchi Orthogonal Array Optimization^*
- Chinese Journal of Chemical Engineering Vol. 20, Issue 5, Pages: 923-929(2012)
- Affiliations：
  
  1. Key Laboratory for Green Chemical Process of Ministry of Education, School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology,Wuhan,China,430073
  2. Mineral Resoures Research Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong,Daejeon,gu,Korea,305-350
  3. Department of Chemistry and Biochemistry, University of Agriculture,Faisalabad,Pakistan,38040
- Author bio：
- Funds：
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- Published：2012
- Accepted：
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and Taguchi Orthogonal Array Optimization
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and Taguchi Orthogonal Array Optimization DOI：

摘要

Abstract

A study was carried out to examine the possibility for

Aspergillus niger

strain KBS4 to bioleach metals from sulphide ore with low concentration of arsenic and to optimize the parameters that affect this process by orthogonal array optimization. Fungal sample was collected

purified and sequenced. The bioleaching process was optimized with L25 Taguchi orthogonal experimental array design. Five factors were investigated and 25 batch bioleaching tests were run at five levels for each factor. The parameters were initial pH

particle size

pulp density

initial inoculums and residence time for bioleaching. The experimental results showed that under optimized leaching conditions: pH 5.5

particle size 180 μm

initial inoculums size 3×10

spores per ml

pulp density 15% and residence time of 20 days

the bioleach ability of metals were 63% Fe

68% Zn

60% As

79% Cu and 54% Al. The biosorption of metal ions by fungal biomass might occur during the bioleaching process but it did not hinder the removal of metal ions by bioleaching.

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One Step Bioleaching of Sulphide Ore with Low Concentration of Arsenic by Aspergillus niger and Taguchi Orthogonal Array Optimization*

DOI：

摘要

Abstract

关键词

Keywords

references

One Step Bioleaching of Sulphide Ore with Low Concentration of Arsenic by Aspergillus niger and Taguchi Orthogonal Array Optimization^*