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Biogenic calcite particles from microalgae-Coccoliths as a potential raw material.

Ioanna Jakob1, Makrina Artemis Chairopoulou2, Marijan Vučak3

  • 1Institute of Process Engineering in Life Science Section III: Bioprocess Engineering Karlsruhe Institute of Technology (KIT) Karlsruhe Germany.

Engineering in Life Sciences
|July 14, 2017
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Summary

Microalgae produce unique, porous calcite structures called coccoliths, distinct from industrial synthetic calcite particles. These sophisticated micro-structures show potential for novel applications in the calcite industry.

Keywords:
Biogenic calcium carbonateBio‐inspired materialsCoccoliths productionEmiliania huxleyi

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Area of Science:

  • Biomineralization
  • Materials Science
  • Microbiology

Background:

  • Synthetic calcite (CaCO3) particles are widely used but limited to basic shapes.
  • The microalga Emiliania huxleyi naturally produces intricate calcite structures known as coccoliths.

Purpose of the Study:

  • To evaluate coccoliths as potential industrial calcite particles.
  • To compare the characteristics of coccoliths with existing synthetic calcite particles.
  • To explore novel applications for microalgal calcite.

Main Methods:

  • Characterization of coccolith morphology and composition.
  • Comparison of coccolith properties with industrial calcite standards.
  • Analysis of particle size distribution and structural complexity.

Main Results:

  • Coccoliths exhibit significantly different properties compared to industrial calcite particles.
  • Coccoliths are porous, calcium carbonate-based particles with embedded elements (Mg, Si, Sr, Fe).
  • Coccoliths possess highly sophisticated structures with homogeneous morphology and size distribution.

Conclusions:

  • Coccoliths represent a novel class of calcite particles with unique micro-structures.
  • The sophisticated and homogeneous nature of coccoliths offers potential for specialized applications.
  • Further research into coccolith utilization could drive innovation in the calcite industry.