The modification of gamma alumina (_-Al2O3) derived from used aluminium (Al) beverage cans as an adsorbent for wastewater treatment is an eco-friendly strategy that supports the Al recycling initiative in Malaysia. This research aimed to evaluate the potential of thiol functionalised _-Al2O3 as an adsorbent for Cd2+ removal. The research was conducted with three objectives: first the synthesis of _-Al2O3 from Al beverage cans (later named as _-Al2O3(S)) and thiol-functionalised _-Al2O3 (_-Al2O3-BDMT and _-Al2O3-TgA) from both commercial and synthesised _-Al2O3 (named _-Al2O3(C) and _-Al2O3(S) respectively); secondly, the characterisation of the adsorbents and finally the equilibrium adsorption studies in aqueous solution towards Cd2+, which includes adsorption isotherm profile and kinetics. From the adsorption studies, all adsorbents demonstrated an optimum Cd2+ removal at pH 6 at an initial Cd2+ concentration of 10 mg/L. However, _-Al2O3(C)-BDMT, _-Al2O3(S)-BDMT, _-Al2O3(C)-TgA and _-.....

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