Remediation of Contaminated Bauxite Residue Using Gracilaria Sp. Adsorbents

Bauxite residue, often referred to as red mud, is the main waste product of alkaline alumina extraction from bauxite that includes high concentrations of heavy metals. The ecosystems, plants, animals, and human health are all at risk from these heavy metals. The removal of heavy metals (As, Ni, Cr, and Fe) from bauxite residue using Gracilaria sp. is the main topic of this article. By employing the oil spherification process, gracilaria sp. was used to create alginate beads that effectively removed heavy metals from bauxite waste. The contaminated bauxite residue was cleaned up using these beads as adsorbents. According to the findings, gracilaria sp. were successful in eliminating Cr, As, Ni, and Fe. The best concentration for removing iron (Fe) from 30 millilitres of bauxite residue solution at 25 oC was 1g of alginate beads. The optimal concentrations for removing chromium (Cr) were 2g and 3g, whereas 3g of gracilaria sp adsorbents at a constant temperature of 25 oC were ideal for removing arsenic (As) and nickel (Ni).