The promotion effect of FeS2 on Sb2S3 bioleaching and Sb speciation transformation
Stibnite (Sb2S3) is an important but difficult to biologically leach mineral, so it is important to find a potential scheme for improving the bioleaching rate of Sb2S3. In this study, by combining experiments and first-principles density functional theory (DFT) calculations, the impact and related m...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2025-01-01
|
| Series: | Frontiers in Microbiology |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmicb.2025.1475572/full |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832592424676884480 |
|---|---|
| author | Xing-fu Zheng Xing-fu Zheng Xing-fu Zheng Jin-lan Xia Jin-lan Xia Zhen-yuan Nie Zhen-yuan Nie Hong-peng Cao Hong-peng Cao Rui-Jia Hu Yu-ting Liang Hong-chang Liu Hong-chang Liu |
| author_facet | Xing-fu Zheng Xing-fu Zheng Xing-fu Zheng Jin-lan Xia Jin-lan Xia Zhen-yuan Nie Zhen-yuan Nie Hong-peng Cao Hong-peng Cao Rui-Jia Hu Yu-ting Liang Hong-chang Liu Hong-chang Liu |
| author_sort | Xing-fu Zheng |
| collection | DOAJ |
| description | Stibnite (Sb2S3) is an important but difficult to biologically leach mineral, so it is important to find a potential scheme for improving the bioleaching rate of Sb2S3. In this study, by combining experiments and first-principles density functional theory (DFT) calculations, the impact and related mechanisms of pyrite (FeS2) on stibnite (Sb2S3) bioleaching were studied for the first time. The bioleaching results revealed that FeS2 obviously improved the Sb2S3 bioleaching rate, and in the 0.5FeS2:0.5CuFeS2 system, the bioleaching rate of Sb2S3 increased from 2.23 to 24.6%, which was the best mass mixing ratio. The XPS and XANES results revealed that during the bioleaching process, Sb2S3 was transformed to Sb2O3 and Sb2O5. The electrochemical results revealed that after FeS2 was mixed, a FeS2-Sb2S3 galvanic cell formed, which promoted the electron transfer efficiency and redox reaction of Sb2S3. The DFT results show that between the Sb2S3 (0 1 0) and FeS2 (1 0 0) surfaces, S-Fe, S-S, S-Sb, and Sb-Fe bonds are formed, and the direction of electron transfer is from Sb2S3 to FeS2; the work functions for Sb2S3 after addition of FeS2 decrease, implying that faster electron transfer occurs; Fe(III)-6H2O derived from FeS2 adsorbs on the surface more easily than does glucose, which is the major component of the extracellular polymeric substances in bacteria, indicating that during the bioleaching process, Fe(III)-6H2O plays an important role; after mixing, both Fe(III)-6H2O and glucose adsorb on the Sb2S3 (0 1 0) surface more easily, with stronger bonds and larger adsorption energies, which are in good agreement with the experimental results. |
| format | Article |
| id | doaj-art-9f426c157dfe4fbc83331fe4d4a7b88e |
| institution | Kabale University |
| issn | 1664-302X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Microbiology |
| spelling | doaj-art-9f426c157dfe4fbc83331fe4d4a7b88e2025-01-21T08:37:01ZengFrontiers Media S.A.Frontiers in Microbiology1664-302X2025-01-011610.3389/fmicb.2025.14755721475572The promotion effect of FeS2 on Sb2S3 bioleaching and Sb speciation transformationXing-fu Zheng0Xing-fu Zheng1Xing-fu Zheng2Jin-lan Xia3Jin-lan Xia4Zhen-yuan Nie5Zhen-yuan Nie6Hong-peng Cao7Hong-peng Cao8Rui-Jia Hu9Yu-ting Liang10Hong-chang Liu11Hong-chang Liu12School of Minerals Processing and Bioengineering, Central South University, Changsha, ChinaGuangxi Academy of Sciences, Nanning, ChinaKey Lab of Biometallurgy of Ministry of Education of China, Central South University, Changsha, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha, ChinaKey Lab of Biometallurgy of Ministry of Education of China, Central South University, Changsha, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha, ChinaKey Lab of Biometallurgy of Ministry of Education of China, Central South University, Changsha, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha, ChinaKey Lab of Biometallurgy of Ministry of Education of China, Central South University, Changsha, ChinaGuangxi Academy of Sciences, Nanning, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha, ChinaSchool of Minerals Processing and Bioengineering, Central South University, Changsha, ChinaKey Lab of Biometallurgy of Ministry of Education of China, Central South University, Changsha, ChinaStibnite (Sb2S3) is an important but difficult to biologically leach mineral, so it is important to find a potential scheme for improving the bioleaching rate of Sb2S3. In this study, by combining experiments and first-principles density functional theory (DFT) calculations, the impact and related mechanisms of pyrite (FeS2) on stibnite (Sb2S3) bioleaching were studied for the first time. The bioleaching results revealed that FeS2 obviously improved the Sb2S3 bioleaching rate, and in the 0.5FeS2:0.5CuFeS2 system, the bioleaching rate of Sb2S3 increased from 2.23 to 24.6%, which was the best mass mixing ratio. The XPS and XANES results revealed that during the bioleaching process, Sb2S3 was transformed to Sb2O3 and Sb2O5. The electrochemical results revealed that after FeS2 was mixed, a FeS2-Sb2S3 galvanic cell formed, which promoted the electron transfer efficiency and redox reaction of Sb2S3. The DFT results show that between the Sb2S3 (0 1 0) and FeS2 (1 0 0) surfaces, S-Fe, S-S, S-Sb, and Sb-Fe bonds are formed, and the direction of electron transfer is from Sb2S3 to FeS2; the work functions for Sb2S3 after addition of FeS2 decrease, implying that faster electron transfer occurs; Fe(III)-6H2O derived from FeS2 adsorbs on the surface more easily than does glucose, which is the major component of the extracellular polymeric substances in bacteria, indicating that during the bioleaching process, Fe(III)-6H2O plays an important role; after mixing, both Fe(III)-6H2O and glucose adsorb on the Sb2S3 (0 1 0) surface more easily, with stronger bonds and larger adsorption energies, which are in good agreement with the experimental results.https://www.frontiersin.org/articles/10.3389/fmicb.2025.1475572/fullSb2S3FeS2bioleachingXANES spectroscopyelectrochemistryDFT calculations |
| spellingShingle | Xing-fu Zheng Xing-fu Zheng Xing-fu Zheng Jin-lan Xia Jin-lan Xia Zhen-yuan Nie Zhen-yuan Nie Hong-peng Cao Hong-peng Cao Rui-Jia Hu Yu-ting Liang Hong-chang Liu Hong-chang Liu The promotion effect of FeS2 on Sb2S3 bioleaching and Sb speciation transformation Frontiers in Microbiology Sb2S3 FeS2 bioleaching XANES spectroscopy electrochemistry DFT calculations |
| title | The promotion effect of FeS2 on Sb2S3 bioleaching and Sb speciation transformation |
| title_full | The promotion effect of FeS2 on Sb2S3 bioleaching and Sb speciation transformation |
| title_fullStr | The promotion effect of FeS2 on Sb2S3 bioleaching and Sb speciation transformation |
| title_full_unstemmed | The promotion effect of FeS2 on Sb2S3 bioleaching and Sb speciation transformation |
| title_short | The promotion effect of FeS2 on Sb2S3 bioleaching and Sb speciation transformation |
| title_sort | promotion effect of fes2 on sb2s3 bioleaching and sb speciation transformation |
| topic | Sb2S3 FeS2 bioleaching XANES spectroscopy electrochemistry DFT calculations |
| url | https://www.frontiersin.org/articles/10.3389/fmicb.2025.1475572/full |
| work_keys_str_mv | AT xingfuzheng thepromotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT xingfuzheng thepromotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT xingfuzheng thepromotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT jinlanxia thepromotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT jinlanxia thepromotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT zhenyuannie thepromotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT zhenyuannie thepromotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT hongpengcao thepromotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT hongpengcao thepromotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT ruijiahu thepromotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT yutingliang thepromotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT hongchangliu thepromotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT hongchangliu thepromotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT xingfuzheng promotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT xingfuzheng promotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT xingfuzheng promotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT jinlanxia promotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT jinlanxia promotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT zhenyuannie promotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT zhenyuannie promotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT hongpengcao promotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT hongpengcao promotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT ruijiahu promotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT yutingliang promotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT hongchangliu promotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation AT hongchangliu promotioneffectoffes2onsb2s3bioleachingandsbspeciationtransformation |