Home › Cell Biology › Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
Cell Biology JoVE (Open Access) Citable · DOI

Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent

DOI: 10.3791/55062-v
What you'll learn
  • ✓ Extract calcium from blast furnace slag via acid leaching
  • ✓ Synthesize precipitated calcium carbonate through mineral carbonation
  • ✓ Convert slag residues into zeolitic material by alkaline hydrothermal treatment
  • ✓ Evaluate zeolitic adsorbent performance for heavy metal removal
Protocol

A protocol for the parallel production of precipitated calcium carbonate and zeolitic material from blast furnace slag via mineral carbonation and alkaline hydrothermal conversion, respectively, is presented. The performance of the zeolitic material towards nickel adsorption is tested.

Difficulty
advanced
Total time
~3-4 days (includes leaching, carbonation, hydrothermal conversion, and adsorption testing)

Steps

1
Extract calcium from blast furnace slag

Perform acid leaching of blast furnace slag to selectively dissolve and extract calcium. Separate the purified leachate from solid residues for downstream processing.

▶ 01:06
2
Carbonate purified leachate to produce PCC

Treat the extracted calcium leachate with CO₂ via mineral carbonation to synthesize precipitated calcium carbonate (PCC). Monitor carbonation progress and isolate the final product.

▶ 03:45
3
Convert slag residues to zeolitic material

Subject the solid residues from calcium extraction to alkaline hydrothermal conversion conditions to synthesize zeolitic material suitable for heavy metal adsorption.

▶ 05:02
4
Test zeolitic material nickel adsorption capacity

Perform batch adsorption tests using the synthesized zeolitic material to quantify its ability to remove nickel and other heavy metals from aqueous solutions.

▶ 06:28
5
Analyze PCC and zeolite product characterization

Present results of precipitated calcium carbonate and zeolitic material yields, purity, and heavy metal adsorption performance data from the parallel valorization process.

▶ 08:10
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