Inorganic Chemicals Industry ›› 2025, Vol. 57 ›› Issue (12): 83-91.doi: 10.19964/j.issn.1006-4990.2024-0659

• Environment·Health·Safety • Previous Articles     Next Articles

Study on preparation and morphology of nano-calcium carbonate based on snail shell biomass

TANG Ziling1(), LIANG Meina1,2,3(), TANG Hongjie1, PENG Yuxuan1, JIANG Zhuocheng1, WANG Dunqiu1,2,3, LI Juhao1   

  1. 1. College of Environmental Science and Engineering,Guilin University of Technology,Guilin 541004,China
    2. Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin University of Technology,Guilin 541004,China
    3. Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area,Guilin University of Technology,Guilin 541004,China
  • Received:2024-12-10 Online:2025-12-10 Published:2025-05-13
  • Contact: LIANG Meina E-mail:tangziling126@163.com;liangmeinaa@163.com

Abstract:

By employing discarded spire snail shells from the Beibu Gulf in Guangxi as raw materials,multi-morphology nano-calcium carbonate(nano-CaCO3) was successfully synthesized via an ultrasonic-assisted bubble carbonization method.Glycine(Gly) and sodium dodecyl sulfate(SDS) were used as crystal morphology inducers.The synthesized products were characterized using SEM,XRD,FT-IR,Raman spectroscopy,and TG.The results demonstrated that Gly primarily resulted in cubic CaCO3 particles,while SDS predominantly induced spherical CaCO3.When both Gly and SDS were combined,the CaCO3 morphology was mainly spindle-shaped.This study investigated the effects of individual Gly/SDS carbonization systems and the composite carbonization system on the crystal size,morphology,and thermal stability of nano-CaCO3,proposing a reaction mechanism for Gly/SDS.The analysis indicated that the CaCO3 in the shells exhibited a wurtzite crystal structure with a purity of 95.46%.Spherical nano-CaCO3 prepared at a mass concentration of 3.0 mg/mL had the smallest average particle size of 60.80 nm.Both the individual Gly/SDS carbonization system and the composite system produced calcite-type CaCO3 crystals.The thermal stability of CaCO3 synthesized under Gly regulation was superior to that of other morphologies.

Key words: nano-calcium carbonate, glycine, sodium dodecyl sulfate, carbonization method, biomass

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