This study addresses the optimization and simplification of the production of high-performance activated carbons by integrating chemical activation and metal complexation into a single-step process utilizing char derived from the carbonization of local wood waste. Iron(III), copper(II), and zinc(II) chloride salts were successfully applied simultaneously as activating agents and structural modifiers. The physicochemical, structural, elemental, and adsorptive characteristics of the resulting composite porous materials were thoroughly evaluated. The experimental findings revealed that the single-step co-activation and modification with metal chlorides yielded a well-developed microporous and mesoporous network, large specific surface area, and exceptional binding affinity for organic pollutants in wastewater matrices.