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Granite weathering caused by Acidithiobacillus ferrooxidans under acidic conditions
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Xiaye JIANG1, Bolin WU2, Huan HE2, *, Chenchen XU3, Yu CHENG1, Qiang SUN3, *
Acta Microbiologica Sinica | 2025, 65(6) : 2678 - 2687
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Acta Microbiologica Sinica | 2025, 65(6): 2678-2687
• Research Article •
Granite weathering caused by Acidithiobacillus ferrooxidans under acidic conditions
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Xiaye JIANG1, Bolin WU2, Huan HE2, *, Chenchen XU3, Yu CHENG1, Qiang SUN3, *
Affiliations
  • 1.Coastal Saline-alkali Land Ecological Rehabilitation and Sustainable Utilization Technology Innovation Center, Ministry of Natural Resources, Marin Geological Survey of Jiangsu Province, Nanjing, Jiangsu, China
  • 2.Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, China
  • 3.Geological Research Institute for Coal Green Mining, Xi’an University of Science and Technology, Xi’an, Shaanxi, China
Published: 2025-06-04 doi: 10.13343/j.cnki.wsxb.20250182
Outline
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[Objective] To investigate the bio-weathering effects and mechanisms of Acidithiobacillus ferrooxidans on granite under acidic conditions (pH 2.0). [Methods] A 36-day immersion experiment was conducted, comparing the microbial group, acid solution group (pH 2.0, H2SO4), and pure culture medium (control) group. Physicochemical parameters [pH, redox potential (Eh), and electrical conductivity (EC)] of the soultion, surface chromaticity (CIE-Lab) of granite, and mineral dissolution characteristics were analyzed. [Results] The microbial group significantly accelerated granite weathering, forming a distinct weathered layer on the surface after 9 days. During the initial phase (0‒3 days), plagioclase dissolution caused a pH increase followed by stabilization. Fe3+ accumulation-dominated Eh and EC were regulated by both the initial ion background and weathering products. After bio-weathering, the granite exhibited a decrease of 11.6 in L* (reduced brightness), an increase of 6.8 in a* value (enhanced reddish-brown tone), and an increase of 9.6 in b* value (increased bluish tone). Surface reddish-brown areas were directly correlated with jarosite deposition. [Conclusion] Under acidic conditions, A. ferrooxidans accelerate granite weathering via Fe3+-mediated redox reactions. The chromaticity parameters (ΔL*, Δa*, and Δb*) and morphological characteristics serve as indicators for rapidly assessing weathering intensity. These findings provide a novel basis for evaluating weathering risks caused by acid mine wastewater in surrounding rocks and guiding ecological remediation.

bio-weathering  /  granite  /  Acidithiobacillus ferrooxidans  /  chromaticity analysis
Xiaye JIANG, Bolin WU, Huan HE, Chenchen XU, Yu CHENG, Qiang SUN. Granite weathering caused by Acidithiobacillus ferrooxidans under acidic conditions[J]. Acta Microbiologica Sinica, 2025 , 65 (6) : 2678 -2687 . DOI: 10.13343/j.cnki.wsxb.20250182
Funding
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  • National Key Research and Development Program of China(2023YFF1306003)
  • Pilot Project of Mine-land Integration in Jiangsu Province in 2023(Sucai Zihuan [2023] No.29)
Appendix
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Year 2025 volume 65 Issue 6
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160
59
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Article Info
doi: 10.13343/j.cnki.wsxb.20250182
  • Receive Date：2025-03-06
  • Online Date：2026-02-07
  • Published：2025-06-04
Article Data
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History
  • Received：2025-03-06
  • Accepted：2025-03-28
Funding
National Key Research and Development Program of China(2023YFF1306003)
Pilot Project of Mine-land Integration in Jiangsu Province in 2023(Sucai Zihuan [2023] No.29)
Affiliations
    1.Coastal Saline-alkali Land Ecological Rehabilitation and Sustainable Utilization Technology Innovation Center, Ministry of Natural Resources, Marin Geological Survey of Jiangsu Province, Nanjing, Jiangsu, China
    2.Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, China
    3.Geological Research Institute for Coal Green Mining, Xi’an University of Science and Technology, Xi’an, Shaanxi, China

Corresponding:

*E-mail: HE Huan,
SUN Qiang,
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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