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Morphogenesis and evolution mechanisms of bacterially-induced struvite
Tian-Lei Zhao1, Han Li1, Hao-Fan Jiang1
1CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, People's Republic of China.
Scientific Reports
|January 9, 2021
Summary
Bacteria influence struvite crystal formation and shape. This study reveals how Microbacterium marinum H207 modifies struvite morphology, offering insights into bacterially mediated mineralization processes.
Area of Science:
- Biomineralization
- Microbiology
- Crystallography
Background:
- Bacteria can induce struvite precipitation and alter its morphology.
- Understanding bacterially mediated struvite mineralization is limited.
- Actinomycete Microbacterium marinum H207 was investigated for its effect on struvite morphology.
Purpose of the Study:
- To investigate the effect of Microbacterium marinum H207 on struvite morphology.
- To elucidate the mechanisms behind bacterially mediated struvite morphogenesis.
- To provide deeper insights into bio-struvite mineralization.
Main Methods:
- Combined bacterial mineralization and biomimetic mineralization techniques.
- Utilized time-course experiments with bacterial supernatant.
- Analyzed crystal growth and dissolution using various analytical methods.
Main Results:
- Strain H207 induced struvite with a grouping structure (coffin-like crystal on trapezoid substrate).
- Soluble macromolecules secreted by the bacteria were key to struvite grouping.
- Increased pH and ammonium content promoted crystal habit evolution.
- Crystal growth occurred in two stages: b-axis growth followed by dissolution-precipitation.
Conclusions:
- Bacterial secretions play a crucial role in dictating struvite crystal morphology.
- Environmental factors like pH and ammonium influence crystal habit evolution.
- The study provides a detailed understanding of bacterially mediated struvite mineralization and crystal evolution.
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