Synthesis, Characterization and Mechanism Study of Green Aragonite Crystals from Waste Biomaterials as Calcium Supplement
| Autor: | Mohd Danish Khan, Ji-Whan Ahn, Natnael Shiferaw, Seok ho Jung, Adeeba Farooq, Mee hye Lee, Lulit Habte |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
carbonation Carbonation Geography Planning and Development chemistry.chemical_element TJ807-830 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law engineering.material precipitation TD194-195 01 natural sciences aragonite Renewable energy sources Crystal chemistry.chemical_compound Specific surface area bivalve seashell GE1-350 Calcium oxide 0105 earth and related environmental sciences Acicular Environmental effects of industries and plants Renewable Energy Sustainability and the Environment Precipitation (chemistry) Magnesium Aragonite eggshell 021001 nanoscience & nanotechnology Environmental sciences chemistry Chemical engineering engineering 0210 nano-technology |
| Zdroj: | Sustainability, Vol 12, Iss 5062, p 5062 (2020) |
| ISSN: | 2071-1050 |
| Popis: | In present work, environmentally benign green aragonite crystals were synthesized from waste chicken eggshells and bivalve seashells through a simple and low-cost wet carbonation method. This method involves a constant stirring of calcium oxide slurry and magnesium chloride suspension in aqueous solution with constraint carbon dioxide injection at 80 °C. The physicochemical properties of the synthesized aragonite were further compared with the aragonite synthesized from commercial calcium oxide. The morphological analysis, such as acicular shape and optimum aspect ratio (~21), were confirmed by scanning electron microscopy. The average crystal size (10–30 µm) and specific surface area (2–18 m2 g−1) were determined by particle size and Brunauer–Emmett–Teller analysis, respectively. Moreover, a schematic crystal growth mechanism was proposed to demonstrate the genesis and progression of aragonite crystal. Green aragonite can bridge the void for numerous applications and holds the potential for the commercial-scale synthesis with eggshells and bivalve seashells as low-cost precursors. |
| Databáze: | OpenAIRE |
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