Water contamination is a growing global issue, with pollutants from agricultural and industrial activities affecting freshwater sources. Common contaminants include metal and non-metal ions, hydrocarbons, dyes, and coliforms. Effective removal of these pollutants from wastewater is crucial before environmental release. This study explores the use of Calcium Silicate By-product (CSB), a metallurgical waste from the LieNa® process developed by Livium Corporation, as an adsorbent for removing contaminants such as Ni, Cu, as, Cd, Hg, and Pb from wastewater. The LieNa® process, which extracts lithium directly from a-spodumene without thermal conversion, generates approximately 40 per cent of its waste as CSB. analysis using XRF, SEM, and TIMa shows that CSB has a small particle size (Pao 10 um) and primarily consists of calcium, sodium, silicon, and oxygen, in the forms of natrite (74 per cent), oyelite (8.80 per cent), and the O-Na-Ca-Si system (10.20 per cent). Experiments conducted under various conditions demonstrate CSB's adsorption properties, after 24 hrs at 25C, initial pH of 1.53, and 100 rev/min stirring speed. The removal efficiency (Re) of contaminants is influenced by CSB dosage and adsorption duration. Results indicate that Re for Hg. Cd and Cu were 94 per cent, 93 per cent, and 93 per cent respectively, achieved with a 10 gL.1 dosage, while the R, for as was 64 per cent at the same dosage. For Pb and Ni, R, reached 96 per cent and 87 per cent, respectively, with a 20 gL-1 dosage. This study highlights the potential of CSB as an effective agent for the removal of specific toxic elements in aqueous solutions, proposes an innovative utilisation of a metallurgical wastes for contaminant removal from wastewater, potentially converting this material into a valuable byproduct for advanced wastewater treatment.