Journal
INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
Volume 112, Issue 6, Pages 498-504Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/ijmr-2020-8048
Keywords
Kaolin; Iron; Bacteria; Bioleaching; Fungi
Categories
Funding
- Karaj Materials and Energy Institute
Ask authors/readers for more resources
This study aimed to remove iron from kaolin using a biological method by two different species of Bacillus sp. and the combination of A. niger isolated from pistachio skin & Bacillus subtilis. The results showed that Bacillus subtilis treatment at 30 degrees C achieved better performance in iron removal compared to treatment at 25 degrees C. The combination treatment of A. niger & Bacillus subtilis at 27 degrees C for 14 days resulted in a significant decrease in iron content and improved whiteness in kaolin powder.
This study was carried out to remove iron from kaolin using a biological method by two different species of Bacillus sp. and the combination of A. niger isolated from pistachio skin & Bacillus subtilis and comparing them with the control sample. The experiments were carried out for Bacillus sp. at 30 degrees C and 25 degrees C and for the combination of A. niger & Bacillus subtilis at 27 degrees C. The concentration of dissolved iron increased with increasing temperature in the samples treated with Bacillus sp. X-ray fluorescence spectroscopy results of the samples at 25 degrees C showed a reduction of 31.1% in Fe2O3 and Fe content and a reduction of 37% at 30 degrees C after 28 days. Therefore, iron removal by Bacillus subtilis at 30 degrees C achieves better performance than at 25 degrees C. X-ray fluorescence spectroscopy results of the samples treated with the combination of A. niger & Bacillus subtilis show a decrease of 49% in Fe2O3 and Fe content at 27 degrees C after 14 days. The results of colour measurement showed that kaolin powder treated with the combination of A. niger & Bacillus subtilis at 27 degrees C had the highest degree of whiteness compared to other samples.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available