Adsorptive Removal of Cd²⁺ from Aqueous Solution Using Arecanut Husk-Derived Biochar under Different Experimental Conditions
Heavy metals occur naturally in soil due to the weathering of parent materials. At trace levels, they are nontoxic. Cadmium is a heavy metal that is highly toxic at low levels. This study investigates the potential of Arecanut husk-derived biochar as a low-cost and eco-friendly adsorbent for removing cadmium ions (Cd...