Ekstraksi Alumina dan Besi dari Limbah Fly Ash Menggunakan Asam Sulfat
DOI:
https://doi.org/10.28926/briliant.v11i2.2343Keywords:
Alumina, Fly ash, Iron, LeachingAbstract
Fly ash contains alumina and iron that are generated during industrial production processes. Effective utilization of fly ash requires a clear understanding of its physical and chemical properties to ensure optimal use. Fly ash comprises various components, including 13.05 wt% SiO₂, 16.04 wt% Al₂O₃, 36.06 wt% Fe₂O₂, and 6.20 wt% CaO. The objective of this inquire about was to decide the degree to which alumina and iron can be extracted by means of sulfuric acid (H₂SO₄) leaching. The experimental variables included extraction temperature 85, 90, 95, 100, and 120°C and H₂SO₄ concentration at 3, 6, 9, 12, and 15% by volume. The procedure began with standardizing the fly ash by grinding to 60 mesh, followed by washing and drying. Next, the extraction process was carried out for 60 minutes with the addition of an aqueous H₂SO₄ solution. The coming about filtrate was analyzed utilizing Nuclear Retention Spectrophotometry (AAS) to evaluate the concentrations of broken up aluminum and iron. The highest extraction rates were achieved at 120°C with 15% H₂SO₄, yielding approximately 2.79% Al and 7.61% Fe.
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